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-rw-r--r--arch/x86/kvm/vmx.c1259
1 files changed, 830 insertions, 429 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 92496b9b5f2b..40aa29204baf 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -51,10 +51,12 @@
#include <asm/apic.h>
#include <asm/irq_remapping.h>
#include <asm/mmu_context.h>
-#include <asm/nospec-branch.h>
+#include <asm/spec-ctrl.h>
+#include <asm/mshyperv.h>
#include "trace.h"
#include "pmu.h"
+#include "vmx_evmcs.h"
#define __ex(x) __kvm_handle_fault_on_reboot(x)
#define __ex_clear(x, reg) \
@@ -130,13 +132,15 @@ module_param_named(preemption_timer, enable_preemption_timer, bool, S_IRUGO);
#endif
#define KVM_GUEST_CR0_MASK (X86_CR0_NW | X86_CR0_CD)
-#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST (X86_CR0_WP | X86_CR0_NE)
-#define KVM_VM_CR0_ALWAYS_ON \
- (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
+#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST X86_CR0_NE
+#define KVM_VM_CR0_ALWAYS_ON \
+ (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | \
+ X86_CR0_WP | X86_CR0_PG | X86_CR0_PE)
#define KVM_CR4_GUEST_OWNED_BITS \
(X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
| X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_TSD)
+#define KVM_VM_CR4_ALWAYS_ON_UNRESTRICTED_GUEST X86_CR4_VMXE
#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
@@ -165,34 +169,33 @@ module_param_named(preemption_timer, enable_preemption_timer, bool, S_IRUGO);
* Time is measured based on a counter that runs at the same rate as the TSC,
* refer SDM volume 3b section 21.6.13 & 22.1.3.
*/
-#define KVM_VMX_DEFAULT_PLE_GAP 128
-#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
-#define KVM_VMX_DEFAULT_PLE_WINDOW_GROW 2
-#define KVM_VMX_DEFAULT_PLE_WINDOW_SHRINK 0
-#define KVM_VMX_DEFAULT_PLE_WINDOW_MAX \
- INT_MAX / KVM_VMX_DEFAULT_PLE_WINDOW_GROW
+static unsigned int ple_gap = KVM_DEFAULT_PLE_GAP;
-static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
-module_param(ple_gap, int, S_IRUGO);
-
-static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
-module_param(ple_window, int, S_IRUGO);
+static unsigned int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
+module_param(ple_window, uint, 0444);
/* Default doubles per-vcpu window every exit. */
-static int ple_window_grow = KVM_VMX_DEFAULT_PLE_WINDOW_GROW;
-module_param(ple_window_grow, int, S_IRUGO);
+static unsigned int ple_window_grow = KVM_DEFAULT_PLE_WINDOW_GROW;
+module_param(ple_window_grow, uint, 0444);
/* Default resets per-vcpu window every exit to ple_window. */
-static int ple_window_shrink = KVM_VMX_DEFAULT_PLE_WINDOW_SHRINK;
-module_param(ple_window_shrink, int, S_IRUGO);
+static unsigned int ple_window_shrink = KVM_DEFAULT_PLE_WINDOW_SHRINK;
+module_param(ple_window_shrink, uint, 0444);
/* Default is to compute the maximum so we can never overflow. */
-static int ple_window_actual_max = KVM_VMX_DEFAULT_PLE_WINDOW_MAX;
-static int ple_window_max = KVM_VMX_DEFAULT_PLE_WINDOW_MAX;
-module_param(ple_window_max, int, S_IRUGO);
+static unsigned int ple_window_max = KVM_VMX_DEFAULT_PLE_WINDOW_MAX;
+module_param(ple_window_max, uint, 0444);
extern const ulong vmx_return;
+struct kvm_vmx {
+ struct kvm kvm;
+
+ unsigned int tss_addr;
+ bool ept_identity_pagetable_done;
+ gpa_t ept_identity_map_addr;
+};
+
#define NR_AUTOLOAD_MSRS 8
struct vmcs {
@@ -424,6 +427,35 @@ struct __packed vmcs12 {
*/
#define VMCS12_MAX_FIELD_INDEX 0x17
+struct nested_vmx_msrs {
+ /*
+ * We only store the "true" versions of the VMX capability MSRs. We
+ * generate the "non-true" versions by setting the must-be-1 bits
+ * according to the SDM.
+ */
+ u32 procbased_ctls_low;
+ u32 procbased_ctls_high;
+ u32 secondary_ctls_low;
+ u32 secondary_ctls_high;
+ u32 pinbased_ctls_low;
+ u32 pinbased_ctls_high;
+ u32 exit_ctls_low;
+ u32 exit_ctls_high;
+ u32 entry_ctls_low;
+ u32 entry_ctls_high;
+ u32 misc_low;
+ u32 misc_high;
+ u32 ept_caps;
+ u32 vpid_caps;
+ u64 basic;
+ u64 cr0_fixed0;
+ u64 cr0_fixed1;
+ u64 cr4_fixed0;
+ u64 cr4_fixed1;
+ u64 vmcs_enum;
+ u64 vmfunc_controls;
+};
+
/*
* The nested_vmx structure is part of vcpu_vmx, and holds information we need
* for correct emulation of VMX (i.e., nested VMX) on this vcpu.
@@ -475,32 +507,7 @@ struct nested_vmx {
u16 vpid02;
u16 last_vpid;
- /*
- * We only store the "true" versions of the VMX capability MSRs. We
- * generate the "non-true" versions by setting the must-be-1 bits
- * according to the SDM.
- */
- u32 nested_vmx_procbased_ctls_low;
- u32 nested_vmx_procbased_ctls_high;
- u32 nested_vmx_secondary_ctls_low;
- u32 nested_vmx_secondary_ctls_high;
- u32 nested_vmx_pinbased_ctls_low;
- u32 nested_vmx_pinbased_ctls_high;
- u32 nested_vmx_exit_ctls_low;
- u32 nested_vmx_exit_ctls_high;
- u32 nested_vmx_entry_ctls_low;
- u32 nested_vmx_entry_ctls_high;
- u32 nested_vmx_misc_low;
- u32 nested_vmx_misc_high;
- u32 nested_vmx_ept_caps;
- u32 nested_vmx_vpid_caps;
- u64 nested_vmx_basic;
- u64 nested_vmx_cr0_fixed0;
- u64 nested_vmx_cr0_fixed1;
- u64 nested_vmx_cr4_fixed0;
- u64 nested_vmx_cr4_fixed1;
- u64 nested_vmx_vmcs_enum;
- u64 nested_vmx_vmfunc_controls;
+ struct nested_vmx_msrs msrs;
/* SMM related state */
struct {
@@ -691,6 +698,11 @@ enum segment_cache_field {
SEG_FIELD_NR = 4
};
+static inline struct kvm_vmx *to_kvm_vmx(struct kvm *kvm)
+{
+ return container_of(kvm, struct kvm_vmx, kvm);
+}
+
static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
{
return container_of(vcpu, struct vcpu_vmx, vcpu);
@@ -953,6 +965,7 @@ static struct vmcs_config {
u32 cpu_based_2nd_exec_ctrl;
u32 vmexit_ctrl;
u32 vmentry_ctrl;
+ struct nested_vmx_msrs nested;
} vmcs_config;
static struct vmx_capability {
@@ -999,6 +1012,169 @@ static const u32 vmx_msr_index[] = {
MSR_EFER, MSR_TSC_AUX, MSR_STAR,
};
+DEFINE_STATIC_KEY_FALSE(enable_evmcs);
+
+#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
+
+#define KVM_EVMCS_VERSION 1
+
+#if IS_ENABLED(CONFIG_HYPERV)
+static bool __read_mostly enlightened_vmcs = true;
+module_param(enlightened_vmcs, bool, 0444);
+
+static inline void evmcs_write64(unsigned long field, u64 value)
+{
+ u16 clean_field;
+ int offset = get_evmcs_offset(field, &clean_field);
+
+ if (offset < 0)
+ return;
+
+ *(u64 *)((char *)current_evmcs + offset) = value;
+
+ current_evmcs->hv_clean_fields &= ~clean_field;
+}
+
+static inline void evmcs_write32(unsigned long field, u32 value)
+{
+ u16 clean_field;
+ int offset = get_evmcs_offset(field, &clean_field);
+
+ if (offset < 0)
+ return;
+
+ *(u32 *)((char *)current_evmcs + offset) = value;
+ current_evmcs->hv_clean_fields &= ~clean_field;
+}
+
+static inline void evmcs_write16(unsigned long field, u16 value)
+{
+ u16 clean_field;
+ int offset = get_evmcs_offset(field, &clean_field);
+
+ if (offset < 0)
+ return;
+
+ *(u16 *)((char *)current_evmcs + offset) = value;
+ current_evmcs->hv_clean_fields &= ~clean_field;
+}
+
+static inline u64 evmcs_read64(unsigned long field)
+{
+ int offset = get_evmcs_offset(field, NULL);
+
+ if (offset < 0)
+ return 0;
+
+ return *(u64 *)((char *)current_evmcs + offset);
+}
+
+static inline u32 evmcs_read32(unsigned long field)
+{
+ int offset = get_evmcs_offset(field, NULL);
+
+ if (offset < 0)
+ return 0;
+
+ return *(u32 *)((char *)current_evmcs + offset);
+}
+
+static inline u16 evmcs_read16(unsigned long field)
+{
+ int offset = get_evmcs_offset(field, NULL);
+
+ if (offset < 0)
+ return 0;
+
+ return *(u16 *)((char *)current_evmcs + offset);
+}
+
+static void evmcs_load(u64 phys_addr)
+{
+ struct hv_vp_assist_page *vp_ap =
+ hv_get_vp_assist_page(smp_processor_id());
+
+ vp_ap->current_nested_vmcs = phys_addr;
+ vp_ap->enlighten_vmentry = 1;
+}
+
+static void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
+{
+ /*
+ * Enlightened VMCSv1 doesn't support these:
+ *
+ * POSTED_INTR_NV = 0x00000002,
+ * GUEST_INTR_STATUS = 0x00000810,
+ * APIC_ACCESS_ADDR = 0x00002014,
+ * POSTED_INTR_DESC_ADDR = 0x00002016,
+ * EOI_EXIT_BITMAP0 = 0x0000201c,
+ * EOI_EXIT_BITMAP1 = 0x0000201e,
+ * EOI_EXIT_BITMAP2 = 0x00002020,
+ * EOI_EXIT_BITMAP3 = 0x00002022,
+ */
+ vmcs_conf->pin_based_exec_ctrl &= ~PIN_BASED_POSTED_INTR;
+ vmcs_conf->cpu_based_2nd_exec_ctrl &=
+ ~SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY;
+ vmcs_conf->cpu_based_2nd_exec_ctrl &=
+ ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
+ vmcs_conf->cpu_based_2nd_exec_ctrl &=
+ ~SECONDARY_EXEC_APIC_REGISTER_VIRT;
+
+ /*
+ * GUEST_PML_INDEX = 0x00000812,
+ * PML_ADDRESS = 0x0000200e,
+ */
+ vmcs_conf->cpu_based_2nd_exec_ctrl &= ~SECONDARY_EXEC_ENABLE_PML;
+
+ /* VM_FUNCTION_CONTROL = 0x00002018, */
+ vmcs_conf->cpu_based_2nd_exec_ctrl &= ~SECONDARY_EXEC_ENABLE_VMFUNC;
+
+ /*
+ * EPTP_LIST_ADDRESS = 0x00002024,
+ * VMREAD_BITMAP = 0x00002026,
+ * VMWRITE_BITMAP = 0x00002028,
+ */
+ vmcs_conf->cpu_based_2nd_exec_ctrl &= ~SECONDARY_EXEC_SHADOW_VMCS;
+
+ /*
+ * TSC_MULTIPLIER = 0x00002032,
+ */
+ vmcs_conf->cpu_based_2nd_exec_ctrl &= ~SECONDARY_EXEC_TSC_SCALING;
+
+ /*
+ * PLE_GAP = 0x00004020,
+ * PLE_WINDOW = 0x00004022,
+ */
+ vmcs_conf->cpu_based_2nd_exec_ctrl &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
+
+ /*
+ * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
+ */
+ vmcs_conf->pin_based_exec_ctrl &= ~PIN_BASED_VMX_PREEMPTION_TIMER;
+
+ /*
+ * GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808,
+ * HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04,
+ */
+ vmcs_conf->vmexit_ctrl &= ~VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
+ vmcs_conf->vmentry_ctrl &= ~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
+
+ /*
+ * Currently unsupported in KVM:
+ * GUEST_IA32_RTIT_CTL = 0x00002814,
+ */
+}
+#else /* !IS_ENABLED(CONFIG_HYPERV) */
+static inline void evmcs_write64(unsigned long field, u64 value) {}
+static inline void evmcs_write32(unsigned long field, u32 value) {}
+static inline void evmcs_write16(unsigned long field, u16 value) {}
+static inline u64 evmcs_read64(unsigned long field) { return 0; }
+static inline u32 evmcs_read32(unsigned long field) { return 0; }
+static inline u16 evmcs_read16(unsigned long field) { return 0; }
+static inline void evmcs_load(u64 phys_addr) {}
+static inline void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf) {}
+#endif /* IS_ENABLED(CONFIG_HYPERV) */
+
static inline bool is_exception_n(u32 intr_info, u8 vector)
{
return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
@@ -1031,6 +1207,11 @@ static inline bool is_invalid_opcode(u32 intr_info)
return is_exception_n(intr_info, UD_VECTOR);
}
+static inline bool is_gp_fault(u32 intr_info)
+{
+ return is_exception_n(intr_info, GP_VECTOR);
+}
+
static inline bool is_external_interrupt(u32 intr_info)
{
return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
@@ -1313,6 +1494,12 @@ static inline bool cpu_has_vmx_vmfunc(void)
SECONDARY_EXEC_ENABLE_VMFUNC;
}
+static bool vmx_umip_emulated(void)
+{
+ return vmcs_config.cpu_based_2nd_exec_ctrl &
+ SECONDARY_EXEC_DESC;
+}
+
static inline bool report_flexpriority(void)
{
return flexpriority_enabled;
@@ -1320,7 +1507,7 @@ static inline bool report_flexpriority(void)
static inline unsigned nested_cpu_vmx_misc_cr3_count(struct kvm_vcpu *vcpu)
{
- return vmx_misc_cr3_count(to_vmx(vcpu)->nested.nested_vmx_misc_low);
+ return vmx_misc_cr3_count(to_vmx(vcpu)->nested.msrs.misc_low);
}
static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit)
@@ -1341,6 +1528,16 @@ static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12)
PIN_BASED_VMX_PREEMPTION_TIMER;
}
+static inline bool nested_cpu_has_nmi_exiting(struct vmcs12 *vmcs12)
+{
+ return vmcs12->pin_based_vm_exec_control & PIN_BASED_NMI_EXITING;
+}
+
+static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12)
+{
+ return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS;
+}
+
static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12)
{
return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT);
@@ -1479,6 +1676,9 @@ static void vmcs_load(struct vmcs *vmcs)
u64 phys_addr = __pa(vmcs);
u8 error;
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_load(phys_addr);
+
asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
: "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
: "cc", "memory");
@@ -1652,18 +1852,24 @@ static __always_inline unsigned long __vmcs_readl(unsigned long field)
static __always_inline u16 vmcs_read16(unsigned long field)
{
vmcs_check16(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_read16(field);
return __vmcs_readl(field);
}
static __always_inline u32 vmcs_read32(unsigned long field)
{
vmcs_check32(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_read32(field);
return __vmcs_readl(field);
}
static __always_inline u64 vmcs_read64(unsigned long field)
{
vmcs_check64(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_read64(field);
#ifdef CONFIG_X86_64
return __vmcs_readl(field);
#else
@@ -1674,6 +1880,8 @@ static __always_inline u64 vmcs_read64(unsigned long field)
static __always_inline unsigned long vmcs_readl(unsigned long field)
{
vmcs_checkl(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_read64(field);
return __vmcs_readl(field);
}
@@ -1697,18 +1905,27 @@ static __always_inline void __vmcs_writel(unsigned long field, unsigned long val
static __always_inline void vmcs_write16(unsigned long field, u16 value)
{
vmcs_check16(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_write16(field, value);
+
__vmcs_writel(field, value);
}
static __always_inline void vmcs_write32(unsigned long field, u32 value)
{
vmcs_check32(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_write32(field, value);
+
__vmcs_writel(field, value);
}
static __always_inline void vmcs_write64(unsigned long field, u64 value)
{
vmcs_check64(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_write64(field, value);
+
__vmcs_writel(field, value);
#ifndef CONFIG_X86_64
asm volatile ("");
@@ -1719,6 +1936,9 @@ static __always_inline void vmcs_write64(unsigned long field, u64 value)
static __always_inline void vmcs_writel(unsigned long field, unsigned long value)
{
vmcs_checkl(field);
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_write64(field, value);
+
__vmcs_writel(field, value);
}
@@ -1726,6 +1946,9 @@ static __always_inline void vmcs_clear_bits(unsigned long field, u32 mask)
{
BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
"vmcs_clear_bits does not support 64-bit fields");
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_write32(field, evmcs_read32(field) & ~mask);
+
__vmcs_writel(field, __vmcs_readl(field) & ~mask);
}
@@ -1733,6 +1956,9 @@ static __always_inline void vmcs_set_bits(unsigned long field, u32 mask)
{
BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
"vmcs_set_bits does not support 64-bit fields");
+ if (static_branch_unlikely(&enable_evmcs))
+ return evmcs_write32(field, evmcs_read32(field) | mask);
+
__vmcs_writel(field, __vmcs_readl(field) | mask);
}
@@ -1864,6 +2090,14 @@ static void update_exception_bitmap(struct kvm_vcpu *vcpu)
eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
(1u << DB_VECTOR) | (1u << AC_VECTOR);
+ /*
+ * Guest access to VMware backdoor ports could legitimately
+ * trigger #GP because of TSS I/O permission bitmap.
+ * We intercept those #GP and allow access to them anyway
+ * as VMware does.
+ */
+ if (enable_vmware_backdoor)
+ eb |= (1u << GP_VECTOR);
if ((vcpu->guest_debug &
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
@@ -2129,6 +2363,9 @@ static unsigned long segment_base(u16 selector)
static void vmx_save_host_state(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
+#ifdef CONFIG_X86_64
+ int cpu = raw_smp_processor_id();
+#endif
int i;
if (vmx->host_state.loaded)
@@ -2141,7 +2378,15 @@ static void vmx_save_host_state(struct kvm_vcpu *vcpu)
*/
vmx->host_state.ldt_sel = kvm_read_ldt();
vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
+
+#ifdef CONFIG_X86_64
+ save_fsgs_for_kvm();
+ vmx->host_state.fs_sel = current->thread.fsindex;
+ vmx->host_state.gs_sel = current->thread.gsindex;
+#else
savesegment(fs, vmx->host_state.fs_sel);
+ savesegment(gs, vmx->host_state.gs_sel);
+#endif
if (!(vmx->host_state.fs_sel & 7)) {
vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
vmx->host_state.fs_reload_needed = 0;
@@ -2149,7 +2394,6 @@ static void vmx_save_host_state(struct kvm_vcpu *vcpu)
vmcs_write16(HOST_FS_SELECTOR, 0);
vmx->host_state.fs_reload_needed = 1;
}
- savesegment(gs, vmx->host_state.gs_sel);
if (!(vmx->host_state.gs_sel & 7))
vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
else {
@@ -2160,20 +2404,16 @@ static void vmx_save_host_state(struct kvm_vcpu *vcpu)
#ifdef CONFIG_X86_64
savesegment(ds, vmx->host_state.ds_sel);
savesegment(es, vmx->host_state.es_sel);
-#endif
-#ifdef CONFIG_X86_64
- vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
- vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
-#else
- vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
- vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
-#endif
+ vmcs_writel(HOST_FS_BASE, current->thread.fsbase);
+ vmcs_writel(HOST_GS_BASE, cpu_kernelmode_gs_base(cpu));
-#ifdef CONFIG_X86_64
- rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
+ vmx->msr_host_kernel_gs_base = current->thread.gsbase;
if (is_long_mode(&vmx->vcpu))
wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
+#else
+ vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
+ vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
#endif
if (boot_cpu_has(X86_FEATURE_MPX))
rdmsrl(MSR_IA32_BNDCFGS, vmx->host_state.msr_host_bndcfgs);
@@ -2532,6 +2772,19 @@ static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned long *exit
return 0;
}
+static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
+{
+ /*
+ * Ensure that we clear the HLT state in the VMCS. We don't need to
+ * explicitly skip the instruction because if the HLT state is set,
+ * then the instruction is already executing and RIP has already been
+ * advanced.
+ */
+ if (kvm_hlt_in_guest(vcpu->kvm) &&
+ vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT)
+ vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
+}
+
static void vmx_queue_exception(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -2554,6 +2807,8 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu)
return;
}
+ WARN_ON_ONCE(vmx->emulation_required);
+
if (kvm_exception_is_soft(nr)) {
vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
vmx->vcpu.arch.event_exit_inst_len);
@@ -2562,6 +2817,8 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu)
intr_info |= INTR_TYPE_HARD_EXCEPTION;
vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
+
+ vmx_clear_hlt(vcpu);
}
static bool vmx_rdtscp_supported(void)
@@ -2629,18 +2886,15 @@ static void setup_msrs(struct vcpu_vmx *vmx)
vmx_update_msr_bitmap(&vmx->vcpu);
}
-/*
- * reads and returns guest's timestamp counter "register"
- * guest_tsc = (host_tsc * tsc multiplier) >> 48 + tsc_offset
- * -- Intel TSC Scaling for Virtualization White Paper, sec 1.3
- */
-static u64 guest_read_tsc(struct kvm_vcpu *vcpu)
+static u64 vmx_read_l1_tsc_offset(struct kvm_vcpu *vcpu)
{
- u64 host_tsc, tsc_offset;
+ struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
- host_tsc = rdtsc();
- tsc_offset = vmcs_read64(TSC_OFFSET);
- return kvm_scale_tsc(vcpu, host_tsc) + tsc_offset;
+ if (is_guest_mode(vcpu) &&
+ (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING))
+ return vcpu->arch.tsc_offset - vmcs12->tsc_offset;
+
+ return vcpu->arch.tsc_offset;
}
/*
@@ -2689,8 +2943,13 @@ static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu)
* bit in the high half is on if the corresponding bit in the control field
* may be on. See also vmx_control_verify().
*/
-static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
+static void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, bool apicv)
{
+ if (!nested) {
+ memset(msrs, 0, sizeof(*msrs));
+ return;
+ }
+
/*
* Note that as a general rule, the high half of the MSRs (bits in
* the control fields which may be 1) should be initialized by the
@@ -2708,70 +2967,68 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
/* pin-based controls */
rdmsr(MSR_IA32_VMX_PINBASED_CTLS,
- vmx->nested.nested_vmx_pinbased_ctls_low,
- vmx->nested.nested_vmx_pinbased_ctls_high);
- vmx->nested.nested_vmx_pinbased_ctls_low |=
+ msrs->pinbased_ctls_low,
+ msrs->pinbased_ctls_high);
+ msrs->pinbased_ctls_low |=
PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
- vmx->nested.nested_vmx_pinbased_ctls_high &=
+ msrs->pinbased_ctls_high &=
PIN_BASED_EXT_INTR_MASK |
PIN_BASED_NMI_EXITING |
- PIN_BASED_VIRTUAL_NMIS;
- vmx->nested.nested_vmx_pinbased_ctls_high |=
+ PIN_BASED_VIRTUAL_NMIS |
+ (apicv ? PIN_BASED_POSTED_INTR : 0);
+ msrs->pinbased_ctls_high |=
PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
PIN_BASED_VMX_PREEMPTION_TIMER;
- if (kvm_vcpu_apicv_active(&vmx->vcpu))
- vmx->nested.nested_vmx_pinbased_ctls_high |=
- PIN_BASED_POSTED_INTR;
/* exit controls */
rdmsr(MSR_IA32_VMX_EXIT_CTLS,
- vmx->nested.nested_vmx_exit_ctls_low,
- vmx->nested.nested_vmx_exit_ctls_high);
- vmx->nested.nested_vmx_exit_ctls_low =
+ msrs->exit_ctls_low,
+ msrs->exit_ctls_high);
+ msrs->exit_ctls_low =
VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
- vmx->nested.nested_vmx_exit_ctls_high &=
+ msrs->exit_ctls_high &=
#ifdef CONFIG_X86_64
VM_EXIT_HOST_ADDR_SPACE_SIZE |
#endif
VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT;
- vmx->nested.nested_vmx_exit_ctls_high |=
+ msrs->exit_ctls_high |=
VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR |
VM_EXIT_LOAD_IA32_EFER | VM_EXIT_SAVE_IA32_EFER |
VM_EXIT_SAVE_VMX_PREEMPTION_TIMER | VM_EXIT_ACK_INTR_ON_EXIT;
if (kvm_mpx_supported())
- vmx->nested.nested_vmx_exit_ctls_high |= VM_EXIT_CLEAR_BNDCFGS;
+ msrs->exit_ctls_high |= VM_EXIT_CLEAR_BNDCFGS;
/* We support free control of debug control saving. */
- vmx->nested.nested_vmx_exit_ctls_low &= ~VM_EXIT_SAVE_DEBUG_CONTROLS;
+ msrs->exit_ctls_low &= ~VM_EXIT_SAVE_DEBUG_CONTROLS;
/* entry controls */
rdmsr(MSR_IA32_VMX_ENTRY_CTLS,
- vmx->nested.nested_vmx_entry_ctls_low,
- vmx->nested.nested_vmx_entry_ctls_high);
- vmx->nested.nested_vmx_entry_ctls_low =
+ msrs->entry_ctls_low,
+ msrs->entry_ctls_high);
+ msrs->entry_ctls_low =
VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
- vmx->nested.nested_vmx_entry_ctls_high &=
+ msrs->entry_ctls_high &=
#ifdef CONFIG_X86_64
VM_ENTRY_IA32E_MODE |
#endif
VM_ENTRY_LOAD_IA32_PAT;
- vmx->nested.nested_vmx_entry_ctls_high |=
+ msrs->entry_ctls_high |=
(VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER);
if (kvm_mpx_supported())
- vmx->nested.nested_vmx_entry_ctls_high |= VM_ENTRY_LOAD_BNDCFGS;
+ msrs->entry_ctls_high |= VM_ENTRY_LOAD_BNDCFGS;
/* We support free control of debug control loading. */
- vmx->nested.nested_vmx_entry_ctls_low &= ~VM_ENTRY_LOAD_DEBUG_CONTROLS;
+ msrs->entry_ctls_low &= ~VM_ENTRY_LOAD_DEBUG_CONTROLS;
/* cpu-based controls */
rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
- vmx->nested.nested_vmx_procbased_ctls_low,
- vmx->nested.nested_vmx_procbased_ctls_high);
- vmx->nested.nested_vmx_procbased_ctls_low =
+ msrs->procbased_ctls_low,
+ msrs->procbased_ctls_high);
+ msrs->procbased_ctls_low =
CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
- vmx->nested.nested_vmx_procbased_ctls_high &=
+ msrs->procbased_ctls_high &=
CPU_BASED_VIRTUAL_INTR_PENDING |
CPU_BASED_VIRTUAL_NMI_PENDING | CPU_BASED_USE_TSC_OFFSETING |
CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING |
@@ -2791,12 +3048,12 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
* can use it to avoid exits to L1 - even when L0 runs L2
* without MSR bitmaps.
*/
- vmx->nested.nested_vmx_procbased_ctls_high |=
+ msrs->procbased_ctls_high |=
CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
CPU_BASED_USE_MSR_BITMAPS;
/* We support free control of CR3 access interception. */
- vmx->nested.nested_vmx_procbased_ctls_low &=
+ msrs->procbased_ctls_low &=
~(CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING);
/*
@@ -2804,10 +3061,10 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
* depend on CPUID bits, they are added later by vmx_cpuid_update.
*/
rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
- vmx->nested.nested_vmx_secondary_ctls_low,
- vmx->nested.nested_vmx_secondary_ctls_high);
- vmx->nested.nested_vmx_secondary_ctls_low = 0;
- vmx->nested.nested_vmx_secondary_ctls_high &=
+ msrs->secondary_ctls_low,
+ msrs->secondary_ctls_high);
+ msrs->secondary_ctls_low = 0;
+ msrs->secondary_ctls_high &=
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
SECONDARY_EXEC_DESC |
SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
@@ -2817,33 +3074,33 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
if (enable_ept) {
/* nested EPT: emulate EPT also to L1 */
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ msrs->secondary_ctls_high |=
SECONDARY_EXEC_ENABLE_EPT;
- vmx->nested.nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
+ msrs->ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
VMX_EPTP_WB_BIT | VMX_EPT_INVEPT_BIT;
if (cpu_has_vmx_ept_execute_only())
- vmx->nested.nested_vmx_ept_caps |=
+ msrs->ept_caps |=
VMX_EPT_EXECUTE_ONLY_BIT;
- vmx->nested.nested_vmx_ept_caps &= vmx_capability.ept;
- vmx->nested.nested_vmx_ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT |
+ msrs->ept_caps &= vmx_capability.ept;
+ msrs->ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT |
VMX_EPT_EXTENT_CONTEXT_BIT | VMX_EPT_2MB_PAGE_BIT |
VMX_EPT_1GB_PAGE_BIT;
if (enable_ept_ad_bits) {
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ msrs->secondary_ctls_high |=
SECONDARY_EXEC_ENABLE_PML;
- vmx->nested.nested_vmx_ept_caps |= VMX_EPT_AD_BIT;
+ msrs->ept_caps |= VMX_EPT_AD_BIT;
}
}
if (cpu_has_vmx_vmfunc()) {
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ msrs->secondary_ctls_high |=
SECONDARY_EXEC_ENABLE_VMFUNC;
/*
* Advertise EPTP switching unconditionally
* since we emulate it
*/
if (enable_ept)
- vmx->nested.nested_vmx_vmfunc_controls =
+ msrs->vmfunc_controls =
VMX_VMFUNC_EPTP_SWITCHING;
}
@@ -2854,25 +3111,25 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
* not failing the single-context invvpid, and it is worse.
*/
if (enable_vpid) {
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ msrs->secondary_ctls_high |=
SECONDARY_EXEC_ENABLE_VPID;
- vmx->nested.nested_vmx_vpid_caps = VMX_VPID_INVVPID_BIT |
+ msrs->vpid_caps = VMX_VPID_INVVPID_BIT |
VMX_VPID_EXTENT_SUPPORTED_MASK;
}
if (enable_unrestricted_guest)
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ msrs->secondary_ctls_high |=
SECONDARY_EXEC_UNRESTRICTED_GUEST;
/* miscellaneous data */
rdmsr(MSR_IA32_VMX_MISC,
- vmx->nested.nested_vmx_misc_low,
- vmx->nested.nested_vmx_misc_high);
- vmx->nested.nested_vmx_misc_low &= VMX_MISC_SAVE_EFER_LMA;
- vmx->nested.nested_vmx_misc_low |=
+ msrs->misc_low,
+ msrs->misc_high);
+ msrs->misc_low &= VMX_MISC_SAVE_EFER_LMA;
+ msrs->misc_low |=
VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE |
VMX_MISC_ACTIVITY_HLT;
- vmx->nested.nested_vmx_misc_high = 0;
+ msrs->misc_high = 0;
/*
* This MSR reports some information about VMX support. We
@@ -2880,14 +3137,14 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
* guest, and the VMCS structure we give it - not about the
* VMX support of the underlying hardware.
*/
- vmx->nested.nested_vmx_basic =
+ msrs->basic =
VMCS12_REVISION |
VMX_BASIC_TRUE_CTLS |
((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) |
(VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT);
if (cpu_has_vmx_basic_inout())
- vmx->nested.nested_vmx_basic |= VMX_BASIC_INOUT;
+ msrs->basic |= VMX_BASIC_INOUT;
/*
* These MSRs specify bits which the guest must keep fixed on
@@ -2896,15 +3153,15 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
*/
#define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE)
#define VMXON_CR4_ALWAYSON X86_CR4_VMXE
- vmx->nested.nested_vmx_cr0_fixed0 = VMXON_CR0_ALWAYSON;
- vmx->nested.nested_vmx_cr4_fixed0 = VMXON_CR4_ALWAYSON;
+ msrs->cr0_fixed0 = VMXON_CR0_ALWAYSON;
+ msrs->cr4_fixed0 = VMXON_CR4_ALWAYSON;
/* These MSRs specify bits which the guest must keep fixed off. */
- rdmsrl(MSR_IA32_VMX_CR0_FIXED1, vmx->nested.nested_vmx_cr0_fixed1);
- rdmsrl(MSR_IA32_VMX_CR4_FIXED1, vmx->nested.nested_vmx_cr4_fixed1);
+ rdmsrl(MSR_IA32_VMX_CR0_FIXED1, msrs->cr0_fixed1);
+ rdmsrl(MSR_IA32_VMX_CR4_FIXED1, msrs->cr4_fixed1);
/* highest index: VMX_PREEMPTION_TIMER_VALUE */
- vmx->nested.nested_vmx_vmcs_enum = VMCS12_MAX_FIELD_INDEX << 1;
+ msrs->vmcs_enum = VMCS12_MAX_FIELD_INDEX << 1;
}
/*
@@ -2941,7 +3198,7 @@ static int vmx_restore_vmx_basic(struct vcpu_vmx *vmx, u64 data)
BIT_ULL(49) | BIT_ULL(54) | BIT_ULL(55) |
/* reserved */
BIT_ULL(31) | GENMASK_ULL(47, 45) | GENMASK_ULL(63, 56);
- u64 vmx_basic = vmx->nested.nested_vmx_basic;
+ u64 vmx_basic = vmx->nested.msrs.basic;
if (!is_bitwise_subset(vmx_basic, data, feature_and_reserved))
return -EINVAL;
@@ -2960,7 +3217,7 @@ static int vmx_restore_vmx_basic(struct vcpu_vmx *vmx, u64 data)
if (vmx_basic_vmcs_size(vmx_basic) > vmx_basic_vmcs_size(data))
return -EINVAL;
- vmx->nested.nested_vmx_basic = data;
+ vmx->nested.msrs.basic = data;
return 0;
}
@@ -2972,24 +3229,24 @@ vmx_restore_control_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data)
switch (msr_index) {
case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
- lowp = &vmx->nested.nested_vmx_pinbased_ctls_low;
- highp = &vmx->nested.nested_vmx_pinbased_ctls_high;
+ lowp = &vmx->nested.msrs.pinbased_ctls_low;
+ highp = &vmx->nested.msrs.pinbased_ctls_high;
break;
case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
- lowp = &vmx->nested.nested_vmx_procbased_ctls_low;
- highp = &vmx->nested.nested_vmx_procbased_ctls_high;
+ lowp = &vmx->nested.msrs.procbased_ctls_low;
+ highp = &vmx->nested.msrs.procbased_ctls_high;
break;
case MSR_IA32_VMX_TRUE_EXIT_CTLS:
- lowp = &vmx->nested.nested_vmx_exit_ctls_low;
- highp = &vmx->nested.nested_vmx_exit_ctls_high;
+ lowp = &vmx->nested.msrs.exit_ctls_low;
+ highp = &vmx->nested.msrs.exit_ctls_high;
break;
case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
- lowp = &vmx->nested.nested_vmx_entry_ctls_low;
- highp = &vmx->nested.nested_vmx_entry_ctls_high;
+ lowp = &vmx->nested.msrs.entry_ctls_low;
+ highp = &vmx->nested.msrs.entry_ctls_high;
break;
case MSR_IA32_VMX_PROCBASED_CTLS2:
- lowp = &vmx->nested.nested_vmx_secondary_ctls_low;
- highp = &vmx->nested.nested_vmx_secondary_ctls_high;
+ lowp = &vmx->nested.msrs.secondary_ctls_low;
+ highp = &vmx->nested.msrs.secondary_ctls_high;
break;
default:
BUG();
@@ -3020,13 +3277,13 @@ static int vmx_restore_vmx_misc(struct vcpu_vmx *vmx, u64 data)
GENMASK_ULL(13, 9) | BIT_ULL(31);
u64 vmx_misc;
- vmx_misc = vmx_control_msr(vmx->nested.nested_vmx_misc_low,
- vmx->nested.nested_vmx_misc_high);
+ vmx_misc = vmx_control_msr(vmx->nested.msrs.misc_low,
+ vmx->nested.msrs.misc_high);
if (!is_bitwise_subset(vmx_misc, data, feature_and_reserved_bits))
return -EINVAL;
- if ((vmx->nested.nested_vmx_pinbased_ctls_high &
+ if ((vmx->nested.msrs.pinbased_ctls_high &
PIN_BASED_VMX_PREEMPTION_TIMER) &&
vmx_misc_preemption_timer_rate(data) !=
vmx_misc_preemption_timer_rate(vmx_misc))
@@ -3041,8 +3298,8 @@ static int vmx_restore_vmx_misc(struct vcpu_vmx *vmx, u64 data)
if (vmx_misc_mseg_revid(data) != vmx_misc_mseg_revid(vmx_misc))
return -EINVAL;
- vmx->nested.nested_vmx_misc_low = data;
- vmx->nested.nested_vmx_misc_high = data >> 32;
+ vmx->nested.msrs.misc_low = data;
+ vmx->nested.msrs.misc_high = data >> 32;
return 0;
}
@@ -3050,15 +3307,15 @@ static int vmx_restore_vmx_ept_vpid_cap(struct vcpu_vmx *vmx, u64 data)
{
u64 vmx_ept_vpid_cap;
- vmx_ept_vpid_cap = vmx_control_msr(vmx->nested.nested_vmx_ept_caps,
- vmx->nested.nested_vmx_vpid_caps);
+ vmx_ept_vpid_cap = vmx_control_msr(vmx->nested.msrs.ept_caps,
+ vmx->nested.msrs.vpid_caps);
/* Every bit is either reserved or a feature bit. */
if (!is_bitwise_subset(vmx_ept_vpid_cap, data, -1ULL))
return -EINVAL;
- vmx->nested.nested_vmx_ept_caps = data;
- vmx->nested.nested_vmx_vpid_caps = data >> 32;
+ vmx->nested.msrs.ept_caps = data;
+ vmx->nested.msrs.vpid_caps = data >> 32;
return 0;
}
@@ -3068,10 +3325,10 @@ static int vmx_restore_fixed0_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data)
switch (msr_index) {
case MSR_IA32_VMX_CR0_FIXED0:
- msr = &vmx->nested.nested_vmx_cr0_fixed0;
+ msr = &vmx->nested.msrs.cr0_fixed0;
break;
case MSR_IA32_VMX_CR4_FIXED0:
- msr = &vmx->nested.nested_vmx_cr4_fixed0;
+ msr = &vmx->nested.msrs.cr4_fixed0;
break;
default:
BUG();
@@ -3135,7 +3392,7 @@ static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
case MSR_IA32_VMX_EPT_VPID_CAP:
return vmx_restore_vmx_ept_vpid_cap(vmx, data);
case MSR_IA32_VMX_VMCS_ENUM:
- vmx->nested.nested_vmx_vmcs_enum = data;
+ vmx->nested.msrs.vmcs_enum = data;
return 0;
default:
/*
@@ -3146,77 +3403,75 @@ static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
}
/* Returns 0 on success, non-0 otherwise. */
-static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
+static int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata)
{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
-
switch (msr_index) {
case MSR_IA32_VMX_BASIC:
- *pdata = vmx->nested.nested_vmx_basic;
+ *pdata = msrs->basic;
break;
case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
case MSR_IA32_VMX_PINBASED_CTLS:
*pdata = vmx_control_msr(
- vmx->nested.nested_vmx_pinbased_ctls_low,
- vmx->nested.nested_vmx_pinbased_ctls_high);
+ msrs->pinbased_ctls_low,
+ msrs->pinbased_ctls_high);
if (msr_index == MSR_IA32_VMX_PINBASED_CTLS)
*pdata |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
break;
case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
case MSR_IA32_VMX_PROCBASED_CTLS:
*pdata = vmx_control_msr(
- vmx->nested.nested_vmx_procbased_ctls_low,
- vmx->nested.nested_vmx_procbased_ctls_high);
+ msrs->procbased_ctls_low,
+ msrs->procbased_ctls_high);
if (msr_index == MSR_IA32_VMX_PROCBASED_CTLS)
*pdata |= CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
break;
case MSR_IA32_VMX_TRUE_EXIT_CTLS:
case MSR_IA32_VMX_EXIT_CTLS:
*pdata = vmx_control_msr(
- vmx->nested.nested_vmx_exit_ctls_low,
- vmx->nested.nested_vmx_exit_ctls_high);
+ msrs->exit_ctls_low,
+ msrs->exit_ctls_high);
if (msr_index == MSR_IA32_VMX_EXIT_CTLS)
*pdata |= VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
break;
case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
case MSR_IA32_VMX_ENTRY_CTLS:
*pdata = vmx_control_msr(
- vmx->nested.nested_vmx_entry_ctls_low,
- vmx->nested.nested_vmx_entry_ctls_high);
+ msrs->entry_ctls_low,
+ msrs->entry_ctls_high);
if (msr_index == MSR_IA32_VMX_ENTRY_CTLS)
*pdata |= VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
break;
case MSR_IA32_VMX_MISC:
*pdata = vmx_control_msr(
- vmx->nested.nested_vmx_misc_low,
- vmx->nested.nested_vmx_misc_high);
+ msrs->misc_low,
+ msrs->misc_high);
break;
case MSR_IA32_VMX_CR0_FIXED0:
- *pdata = vmx->nested.nested_vmx_cr0_fixed0;
+ *pdata = msrs->cr0_fixed0;
break;
case MSR_IA32_VMX_CR0_FIXED1:
- *pdata = vmx->nested.nested_vmx_cr0_fixed1;
+ *pdata = msrs->cr0_fixed1;
break;
case MSR_IA32_VMX_CR4_FIXED0:
- *pdata = vmx->nested.nested_vmx_cr4_fixed0;
+ *pdata = msrs->cr4_fixed0;
break;
case MSR_IA32_VMX_CR4_FIXED1:
- *pdata = vmx->nested.nested_vmx_cr4_fixed1;
+ *pdata = msrs->cr4_fixed1;
break;
case MSR_IA32_VMX_VMCS_ENUM:
- *pdata = vmx->nested.nested_vmx_vmcs_enum;
+ *pdata = msrs->vmcs_enum;
break;
case MSR_IA32_VMX_PROCBASED_CTLS2:
*pdata = vmx_control_msr(
- vmx->nested.nested_vmx_secondary_ctls_low,
- vmx->nested.nested_vmx_secondary_ctls_high);
+ msrs->secondary_ctls_low,
+ msrs->secondary_ctls_high);
break;
case MSR_IA32_VMX_EPT_VPID_CAP:
- *pdata = vmx->nested.nested_vmx_ept_caps |
- ((u64)vmx->nested.nested_vmx_vpid_caps << 32);
+ *pdata = msrs->ept_caps |
+ ((u64)msrs->vpid_caps << 32);
break;
case MSR_IA32_VMX_VMFUNC:
- *pdata = vmx->nested.nested_vmx_vmfunc_controls;
+ *pdata = msrs->vmfunc_controls;
break;
default:
return 1;
@@ -3235,7 +3490,16 @@ static inline bool vmx_feature_control_msr_valid(struct kvm_vcpu *vcpu,
static int vmx_get_msr_feature(struct kvm_msr_entry *msr)
{
- return 1;
+ switch (msr->index) {
+ case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC:
+ if (!nested)
+ return 1;
+ return vmx_get_vmx_msr(&vmcs_config.nested, msr->index, &msr->data);
+ default:
+ return 1;
+ }
+
+ return 0;
}
/*
@@ -3263,12 +3527,8 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
#endif
case MSR_EFER:
return kvm_get_msr_common(vcpu, msr_info);
- case MSR_IA32_TSC:
- msr_info->data = guest_read_tsc(vcpu);
- break;
case MSR_IA32_SPEC_CTRL:
if (!msr_info->host_initiated &&
- !guest_cpuid_has(vcpu, X86_FEATURE_IBRS) &&
!guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL))
return 1;
@@ -3309,7 +3569,8 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC:
if (!nested_vmx_allowed(vcpu))
return 1;
- return vmx_get_vmx_msr(vcpu, msr_info->index, &msr_info->data);
+ return vmx_get_vmx_msr(&vmx->nested.msrs, msr_info->index,
+ &msr_info->data);
case MSR_IA32_XSS:
if (!vmx_xsaves_supported())
return 1;
@@ -3384,17 +3645,13 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
return 1;
vmcs_write64(GUEST_BNDCFGS, data);
break;
- case MSR_IA32_TSC:
- kvm_write_tsc(vcpu, msr_info);
- break;
case MSR_IA32_SPEC_CTRL:
if (!msr_info->host_initiated &&
- !guest_cpuid_has(vcpu, X86_FEATURE_IBRS) &&
!guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL))
return 1;
/* The STIBP bit doesn't fault even if it's not advertised */
- if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP))
+ if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
return 1;
vmx->spec_ctrl = data;
@@ -3420,7 +3677,6 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
break;
case MSR_IA32_PRED_CMD:
if (!msr_info->host_initiated &&
- !guest_cpuid_has(vcpu, X86_FEATURE_IBPB) &&
!guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL))
return 1;
@@ -3602,6 +3858,14 @@ static int hardware_enable(void)
if (cr4_read_shadow() & X86_CR4_VMXE)
return -EBUSY;
+ /*
+ * This can happen if we hot-added a CPU but failed to allocate
+ * VP assist page for it.
+ */
+ if (static_branch_unlikely(&enable_evmcs) &&
+ !hv_get_vp_assist_page(cpu))
+ return -EFAULT;
+
INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu));
INIT_LIST_HEAD(&per_cpu(blocked_vcpu_on_cpu, cpu));
spin_lock_init(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
@@ -3700,6 +3964,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
u32 _vmexit_control = 0;
u32 _vmentry_control = 0;
+ memset(vmcs_conf, 0, sizeof(*vmcs_conf));
min = CPU_BASED_HLT_EXITING |
#ifdef CONFIG_X86_64
CPU_BASED_CR8_LOAD_EXITING |
@@ -3710,13 +3975,11 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
CPU_BASED_UNCOND_IO_EXITING |
CPU_BASED_MOV_DR_EXITING |
CPU_BASED_USE_TSC_OFFSETING |
+ CPU_BASED_MWAIT_EXITING |
+ CPU_BASED_MONITOR_EXITING |
CPU_BASED_INVLPG_EXITING |
CPU_BASED_RDPMC_EXITING;
- if (!kvm_mwait_in_guest())
- min |= CPU_BASED_MWAIT_EXITING |
- CPU_BASED_MONITOR_EXITING;
-
opt = CPU_BASED_TPR_SHADOW |
CPU_BASED_USE_MSR_BITMAPS |
CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
@@ -3835,7 +4098,12 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
vmcs_conf->size = vmx_msr_high & 0x1fff;
vmcs_conf->order = get_order(vmcs_conf->size);
vmcs_conf->basic_cap = vmx_msr_high & ~0x1fff;
- vmcs_conf->revision_id = vmx_msr_low;
+
+ /* KVM supports Enlightened VMCS v1 only */
+ if (static_branch_unlikely(&enable_evmcs))
+ vmcs_conf->revision_id = KVM_EVMCS_VERSION;
+ else
+ vmcs_conf->revision_id = vmx_msr_low;
vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
@@ -3843,6 +4111,9 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
vmcs_conf->vmexit_ctrl = _vmexit_control;
vmcs_conf->vmentry_ctrl = _vmentry_control;
+ if (static_branch_unlikely(&enable_evmcs))
+ evmcs_sanitize_exec_ctrls(vmcs_conf);
+
cpu_has_load_ia32_efer =
allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
VM_ENTRY_LOAD_IA32_EFER)
@@ -4162,6 +4433,7 @@ static void enter_rmode(struct kvm_vcpu *vcpu)
{
unsigned long flags;
struct vcpu_vmx *vmx = to_vmx(vcpu);
+ struct kvm_vmx *kvm_vmx = to_kvm_vmx(vcpu->kvm);
vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR);
vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES);
@@ -4177,13 +4449,13 @@ static void enter_rmode(struct kvm_vcpu *vcpu)
* Very old userspace does not call KVM_SET_TSS_ADDR before entering
* vcpu. Warn the user that an update is overdue.
*/
- if (!vcpu->kvm->arch.tss_addr)
+ if (!kvm_vmx->tss_addr)
printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be "
"called before entering vcpu\n");
vmx_segment_cache_clear(vmx);
- vmcs_writel(GUEST_TR_BASE, vcpu->kvm->arch.tss_addr);
+ vmcs_writel(GUEST_TR_BASE, kvm_vmx->tss_addr);
vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
@@ -4275,12 +4547,6 @@ static void vmx_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
__vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid, invalidate_gpa);
}
-static void vmx_flush_tlb_ept_only(struct kvm_vcpu *vcpu)
-{
- if (enable_ept)
- vmx_flush_tlb(vcpu, true);
-}
-
static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
@@ -4291,7 +4557,7 @@ static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
static void vmx_decache_cr3(struct kvm_vcpu *vcpu)
{
- if (enable_ept && is_paging(vcpu))
+ if (enable_unrestricted_guest || (enable_ept && is_paging(vcpu)))
vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
__set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
}
@@ -4339,11 +4605,11 @@ static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
static bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
{
- u64 fixed0 = to_vmx(vcpu)->nested.nested_vmx_cr0_fixed0;
- u64 fixed1 = to_vmx(vcpu)->nested.nested_vmx_cr0_fixed1;
+ u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0;
+ u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1;
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
- if (to_vmx(vcpu)->nested.nested_vmx_secondary_ctls_high &
+ if (to_vmx(vcpu)->nested.msrs.secondary_ctls_high &
SECONDARY_EXEC_UNRESTRICTED_GUEST &&
nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST))
fixed0 &= ~(X86_CR0_PE | X86_CR0_PG);
@@ -4353,16 +4619,16 @@ static bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
static bool nested_host_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
{
- u64 fixed0 = to_vmx(vcpu)->nested.nested_vmx_cr0_fixed0;
- u64 fixed1 = to_vmx(vcpu)->nested.nested_vmx_cr0_fixed1;
+ u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0;
+ u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1;
return fixed_bits_valid(val, fixed0, fixed1);
}
static bool nested_cr4_valid(struct kvm_vcpu *vcpu, unsigned long val)
{
- u64 fixed0 = to_vmx(vcpu)->nested.nested_vmx_cr4_fixed0;
- u64 fixed1 = to_vmx(vcpu)->nested.nested_vmx_cr4_fixed1;
+ u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr4_fixed0;
+ u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr4_fixed1;
return fixed_bits_valid(val, fixed0, fixed1);
}
@@ -4428,7 +4694,7 @@ static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
}
#endif
- if (enable_ept)
+ if (enable_ept && !enable_unrestricted_guest)
ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
vmcs_writel(CR0_READ_SHADOW, cr0);
@@ -4469,10 +4735,11 @@ static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
if (enable_ept) {
eptp = construct_eptp(vcpu, cr3);
vmcs_write64(EPT_POINTER, eptp);
- if (is_paging(vcpu) || is_guest_mode(vcpu))
+ if (enable_unrestricted_guest || is_paging(vcpu) ||
+ is_guest_mode(vcpu))
guest_cr3 = kvm_read_cr3(vcpu);
else
- guest_cr3 = vcpu->kvm->arch.ept_identity_map_addr;
+ guest_cr3 = to_kvm_vmx(vcpu->kvm)->ept_identity_map_addr;
ept_load_pdptrs(vcpu);
}
@@ -4487,20 +4754,26 @@ static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
* is in force while we are in guest mode. Do not let guests control
* this bit, even if host CR4.MCE == 0.
*/
- unsigned long hw_cr4 =
- (cr4_read_shadow() & X86_CR4_MCE) |
- (cr4 & ~X86_CR4_MCE) |
- (to_vmx(vcpu)->rmode.vm86_active ?
- KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
+ unsigned long hw_cr4;
- if ((cr4 & X86_CR4_UMIP) && !boot_cpu_has(X86_FEATURE_UMIP)) {
- vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL,
- SECONDARY_EXEC_DESC);
- hw_cr4 &= ~X86_CR4_UMIP;
- } else if (!is_guest_mode(vcpu) ||
- !nested_cpu_has2(get_vmcs12(vcpu), SECONDARY_EXEC_DESC))
- vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL,
+ hw_cr4 = (cr4_read_shadow() & X86_CR4_MCE) | (cr4 & ~X86_CR4_MCE);
+ if (enable_unrestricted_guest)
+ hw_cr4 |= KVM_VM_CR4_ALWAYS_ON_UNRESTRICTED_GUEST;
+ else if (to_vmx(vcpu)->rmode.vm86_active)
+ hw_cr4 |= KVM_RMODE_VM_CR4_ALWAYS_ON;
+ else
+ hw_cr4 |= KVM_PMODE_VM_CR4_ALWAYS_ON;
+
+ if (!boot_cpu_has(X86_FEATURE_UMIP) && vmx_umip_emulated()) {
+ if (cr4 & X86_CR4_UMIP) {
+ vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL,
SECONDARY_EXEC_DESC);
+ hw_cr4 &= ~X86_CR4_UMIP;
+ } else if (!is_guest_mode(vcpu) ||
+ !nested_cpu_has2(get_vmcs12(vcpu), SECONDARY_EXEC_DESC))
+ vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL,
+ SECONDARY_EXEC_DESC);
+ }
if (cr4 & X86_CR4_VMXE) {
/*
@@ -4517,16 +4790,17 @@ static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
return 1;
vcpu->arch.cr4 = cr4;
- if (enable_ept) {
- if (!is_paging(vcpu)) {
- hw_cr4 &= ~X86_CR4_PAE;
- hw_cr4 |= X86_CR4_PSE;
- } else if (!(cr4 & X86_CR4_PAE)) {
- hw_cr4 &= ~X86_CR4_PAE;
+
+ if (!enable_unrestricted_guest) {
+ if (enable_ept) {
+ if (!is_paging(vcpu)) {
+ hw_cr4 &= ~X86_CR4_PAE;
+ hw_cr4 |= X86_CR4_PSE;
+ } else if (!(cr4 & X86_CR4_PAE)) {
+ hw_cr4 &= ~X86_CR4_PAE;
+ }
}
- }
- if (!enable_unrestricted_guest && !is_paging(vcpu))
/*
* SMEP/SMAP/PKU is disabled if CPU is in non-paging mode in
* hardware. To emulate this behavior, SMEP/SMAP/PKU needs
@@ -4538,7 +4812,9 @@ static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
* If enable_unrestricted_guest, the CPU automatically
* disables SMEP/SMAP/PKU when the guest sets CR0.PG=0.
*/
- hw_cr4 &= ~(X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE);
+ if (!is_paging(vcpu))
+ hw_cr4 &= ~(X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE);
+ }
vmcs_writel(CR4_READ_SHADOW, cr4);
vmcs_writel(GUEST_CR4, hw_cr4);
@@ -4906,7 +5182,7 @@ static int init_rmode_tss(struct kvm *kvm)
int idx, r;
idx = srcu_read_lock(&kvm->srcu);
- fn = kvm->arch.tss_addr >> PAGE_SHIFT;
+ fn = to_kvm_vmx(kvm)->tss_addr >> PAGE_SHIFT;
r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
if (r < 0)
goto out;
@@ -4932,22 +5208,23 @@ out:
static int init_rmode_identity_map(struct kvm *kvm)
{
+ struct kvm_vmx *kvm_vmx = to_kvm_vmx(kvm);
int i, idx, r = 0;
kvm_pfn_t identity_map_pfn;
u32 tmp;
- /* Protect kvm->arch.ept_identity_pagetable_done. */
+ /* Protect kvm_vmx->ept_identity_pagetable_done. */
mutex_lock(&kvm->slots_lock);
- if (likely(kvm->arch.ept_identity_pagetable_done))
+ if (likely(kvm_vmx->ept_identity_pagetable_done))
goto out2;
- if (!kvm->arch.ept_identity_map_addr)
- kvm->arch.ept_identity_map_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR;
- identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
+ if (!kvm_vmx->ept_identity_map_addr)
+ kvm_vmx->ept_identity_map_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR;
+ identity_map_pfn = kvm_vmx->ept_identity_map_addr >> PAGE_SHIFT;
r = __x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT,
- kvm->arch.ept_identity_map_addr, PAGE_SIZE);
+ kvm_vmx->ept_identity_map_addr, PAGE_SIZE);
if (r < 0)
goto out2;
@@ -4964,7 +5241,7 @@ static int init_rmode_identity_map(struct kvm *kvm)
if (r < 0)
goto out;
}
- kvm->arch.ept_identity_pagetable_done = true;
+ kvm_vmx->ept_identity_pagetable_done = true;
out:
srcu_read_unlock(&kvm->srcu, idx);
@@ -5500,6 +5777,11 @@ static u32 vmx_exec_control(struct vcpu_vmx *vmx)
exec_control |= CPU_BASED_CR3_STORE_EXITING |
CPU_BASED_CR3_LOAD_EXITING |
CPU_BASED_INVLPG_EXITING;
+ if (kvm_mwait_in_guest(vmx->vcpu.kvm))
+ exec_control &= ~(CPU_BASED_MWAIT_EXITING |
+ CPU_BASED_MONITOR_EXITING);
+ if (kvm_hlt_in_guest(vmx->vcpu.kvm))
+ exec_control &= ~CPU_BASED_HLT_EXITING;
return exec_control;
}
@@ -5533,7 +5815,7 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
}
if (!enable_unrestricted_guest)
exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
- if (!ple_gap)
+ if (kvm_pause_in_guest(vmx->vcpu.kvm))
exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
if (!kvm_vcpu_apicv_active(vcpu))
exec_control &= ~(SECONDARY_EXEC_APIC_REGISTER_VIRT |
@@ -5565,10 +5847,10 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
if (nested) {
if (xsaves_enabled)
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ vmx->nested.msrs.secondary_ctls_high |=
SECONDARY_EXEC_XSAVES;
else
- vmx->nested.nested_vmx_secondary_ctls_high &=
+ vmx->nested.msrs.secondary_ctls_high &=
~SECONDARY_EXEC_XSAVES;
}
}
@@ -5580,10 +5862,10 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
if (nested) {
if (rdtscp_enabled)
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ vmx->nested.msrs.secondary_ctls_high |=
SECONDARY_EXEC_RDTSCP;
else
- vmx->nested.nested_vmx_secondary_ctls_high &=
+ vmx->nested.msrs.secondary_ctls_high &=
~SECONDARY_EXEC_RDTSCP;
}
}
@@ -5601,10 +5883,10 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
if (nested) {
if (invpcid_enabled)
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ vmx->nested.msrs.secondary_ctls_high |=
SECONDARY_EXEC_ENABLE_INVPCID;
else
- vmx->nested.nested_vmx_secondary_ctls_high &=
+ vmx->nested.msrs.secondary_ctls_high &=
~SECONDARY_EXEC_ENABLE_INVPCID;
}
}
@@ -5616,10 +5898,10 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
if (nested) {
if (rdrand_enabled)
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ vmx->nested.msrs.secondary_ctls_high |=
SECONDARY_EXEC_RDRAND_EXITING;
else
- vmx->nested.nested_vmx_secondary_ctls_high &=
+ vmx->nested.msrs.secondary_ctls_high &=
~SECONDARY_EXEC_RDRAND_EXITING;
}
}
@@ -5631,10 +5913,10 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
if (nested) {
if (rdseed_enabled)
- vmx->nested.nested_vmx_secondary_ctls_high |=
+ vmx->nested.msrs.secondary_ctls_high |=
SECONDARY_EXEC_RDSEED_EXITING;
else
- vmx->nested.nested_vmx_secondary_ctls_high &=
+ vmx->nested.msrs.secondary_ctls_high &=
~SECONDARY_EXEC_RDSEED_EXITING;
}
}
@@ -5696,7 +5978,7 @@ static void vmx_vcpu_setup(struct vcpu_vmx *vmx)
vmcs_write64(POSTED_INTR_DESC_ADDR, __pa((&vmx->pi_desc)));
}
- if (ple_gap) {
+ if (!kvm_pause_in_guest(vmx->vcpu.kvm)) {
vmcs_write32(PLE_GAP, ple_gap);
vmx->ple_window = ple_window;
vmx->ple_window_dirty = true;
@@ -5861,6 +6143,8 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
update_exception_bitmap(vcpu);
vpid_sync_context(vmx->vpid);
+ if (init_event)
+ vmx_clear_hlt(vcpu);
}
/*
@@ -5885,8 +6169,7 @@ static bool nested_exit_intr_ack_set(struct kvm_vcpu *vcpu)
static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
{
- return get_vmcs12(vcpu)->pin_based_vm_exec_control &
- PIN_BASED_NMI_EXITING;
+ return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
}
static void enable_irq_window(struct kvm_vcpu *vcpu)
@@ -5932,6 +6215,8 @@ static void vmx_inject_irq(struct kvm_vcpu *vcpu)
} else
intr |= INTR_TYPE_EXT_INTR;
vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
+
+ vmx_clear_hlt(vcpu);
}
static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
@@ -5962,6 +6247,8 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
+
+ vmx_clear_hlt(vcpu);
}
static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
@@ -6024,14 +6311,23 @@ static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
int ret;
+ if (enable_unrestricted_guest)
+ return 0;
+
ret = x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, addr,
PAGE_SIZE * 3);
if (ret)
return ret;
- kvm->arch.tss_addr = addr;
+ to_kvm_vmx(kvm)->tss_addr = addr;
return init_rmode_tss(kvm);
}
+static int vmx_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
+{
+ to_kvm_vmx(kvm)->ept_identity_map_addr = ident_addr;
+ return 0;
+}
+
static bool rmode_exception(struct kvm_vcpu *vcpu, int vec)
{
switch (vec) {
@@ -6134,19 +6430,24 @@ static int handle_exception(struct kvm_vcpu *vcpu)
if (is_nmi(intr_info))
return 1; /* already handled by vmx_vcpu_run() */
- if (is_invalid_opcode(intr_info)) {
- er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
- if (er == EMULATE_USER_EXIT)
- return 0;
- if (er != EMULATE_DONE)
- kvm_queue_exception(vcpu, UD_VECTOR);
- return 1;
- }
+ if (is_invalid_opcode(intr_info))
+ return handle_ud(vcpu);
error_code = 0;
if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
+ if (!vmx->rmode.vm86_active && is_gp_fault(intr_info)) {
+ WARN_ON_ONCE(!enable_vmware_backdoor);
+ er = emulate_instruction(vcpu,
+ EMULTYPE_VMWARE | EMULTYPE_NO_UD_ON_FAIL);
+ if (er == EMULATE_USER_EXIT)
+ return 0;
+ else if (er != EMULATE_DONE)
+ kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
+ return 1;
+ }
+
/*
* The #PF with PFEC.RSVD = 1 indicates the guest is accessing
* MMIO, it is better to report an internal error.
@@ -6232,28 +6533,22 @@ static int handle_triple_fault(struct kvm_vcpu *vcpu)
static int handle_io(struct kvm_vcpu *vcpu)
{
unsigned long exit_qualification;
- int size, in, string, ret;
+ int size, in, string;
unsigned port;
exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
string = (exit_qualification & 16) != 0;
- in = (exit_qualification & 8) != 0;
++vcpu->stat.io_exits;
- if (string || in)
+ if (string)
return emulate_instruction(vcpu, 0) == EMULATE_DONE;
port = exit_qualification >> 16;
size = (exit_qualification & 7) + 1;
+ in = (exit_qualification & 8) != 0;
- ret = kvm_skip_emulated_instruction(vcpu);
-
- /*
- * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered
- * KVM_EXIT_DEBUG here.
- */
- return kvm_fast_pio_out(vcpu, size, port) && ret;
+ return kvm_fast_pio(vcpu, size, port, in);
}
static void
@@ -6344,6 +6639,7 @@ static int handle_cr(struct kvm_vcpu *vcpu)
err = handle_set_cr0(vcpu, val);
return kvm_complete_insn_gp(vcpu, err);
case 3:
+ WARN_ON_ONCE(enable_unrestricted_guest);
err = kvm_set_cr3(vcpu, val);
return kvm_complete_insn_gp(vcpu, err);
case 4:
@@ -6376,6 +6672,7 @@ static int handle_cr(struct kvm_vcpu *vcpu)
case 1: /*mov from cr*/
switch (cr) {
case 3:
+ WARN_ON_ONCE(enable_unrestricted_guest);
val = kvm_read_cr3(vcpu);
kvm_register_write(vcpu, reg, val);
trace_kvm_cr_read(cr, val);
@@ -6769,7 +7066,6 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
{
- int ret;
gpa_t gpa;
/*
@@ -6797,17 +7093,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
NULL, 0) == EMULATE_DONE;
}
- ret = kvm_mmu_page_fault(vcpu, gpa, PFERR_RSVD_MASK, NULL, 0);
- if (ret >= 0)
- return ret;
-
- /* It is the real ept misconfig */
- WARN_ON(1);
-
- vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
- vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
-
- return 0;
+ return kvm_mmu_page_fault(vcpu, gpa, PFERR_RSVD_MASK, NULL, 0);
}
static int handle_nmi_window(struct kvm_vcpu *vcpu)
@@ -6830,6 +7116,13 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
bool intr_window_requested;
unsigned count = 130;
+ /*
+ * We should never reach the point where we are emulating L2
+ * due to invalid guest state as that means we incorrectly
+ * allowed a nested VMEntry with an invalid vmcs12.
+ */
+ WARN_ON_ONCE(vmx->emulation_required && vmx->nested.nested_run_pending);
+
cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING;
@@ -6848,12 +7141,12 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
goto out;
}
- if (err != EMULATE_DONE) {
- vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
- vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
- vcpu->run->internal.ndata = 0;
- return 0;
- }
+ if (err != EMULATE_DONE)
+ goto emulation_error;
+
+ if (vmx->emulation_required && !vmx->rmode.vm86_active &&
+ vcpu->arch.exception.pending)
+ goto emulation_error;
if (vcpu->arch.halt_request) {
vcpu->arch.halt_request = 0;
@@ -6869,34 +7162,12 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
out:
return ret;
-}
-
-static int __grow_ple_window(int val)
-{
- if (ple_window_grow < 1)
- return ple_window;
-
- val = min(val, ple_window_actual_max);
-
- if (ple_window_grow < ple_window)
- val *= ple_window_grow;
- else
- val += ple_window_grow;
-
- return val;
-}
-static int __shrink_ple_window(int val, int modifier, int minimum)
-{
- if (modifier < 1)
- return ple_window;
-
- if (modifier < ple_window)
- val /= modifier;
- else
- val -= modifier;
-
- return max(val, minimum);
+emulation_error:
+ vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
+ vcpu->run->internal.ndata = 0;
+ return 0;
}
static void grow_ple_window(struct kvm_vcpu *vcpu)
@@ -6904,7 +7175,9 @@ static void grow_ple_window(struct kvm_vcpu *vcpu)
struct vcpu_vmx *vmx = to_vmx(vcpu);
int old = vmx->ple_window;
- vmx->ple_window = __grow_ple_window(old);
+ vmx->ple_window = __grow_ple_window(old, ple_window,
+ ple_window_grow,
+ ple_window_max);
if (vmx->ple_window != old)
vmx->ple_window_dirty = true;
@@ -6917,8 +7190,9 @@ static void shrink_ple_window(struct kvm_vcpu *vcpu)
struct vcpu_vmx *vmx = to_vmx(vcpu);
int old = vmx->ple_window;
- vmx->ple_window = __shrink_ple_window(old,
- ple_window_shrink, ple_window);
+ vmx->ple_window = __shrink_ple_window(old, ple_window,
+ ple_window_shrink,
+ ple_window);
if (vmx->ple_window != old)
vmx->ple_window_dirty = true;
@@ -6927,21 +7201,6 @@ static void shrink_ple_window(struct kvm_vcpu *vcpu)
}
/*
- * ple_window_actual_max is computed to be one grow_ple_window() below
- * ple_window_max. (See __grow_ple_window for the reason.)
- * This prevents overflows, because ple_window_max is int.
- * ple_window_max effectively rounded down to a multiple of ple_window_grow in
- * this process.
- * ple_window_max is also prevented from setting vmx->ple_window < ple_window.
- */
-static void update_ple_window_actual_max(void)
-{
- ple_window_actual_max =
- __shrink_ple_window(max(ple_window_max, ple_window),
- ple_window_grow, INT_MIN);
-}
-
-/*
* Handler for POSTED_INTERRUPT_WAKEUP_VECTOR.
*/
static void wakeup_handler(void)
@@ -6960,7 +7219,7 @@ static void wakeup_handler(void)
spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu));
}
-void vmx_enable_tdp(void)
+static void vmx_enable_tdp(void)
{
kvm_mmu_set_mask_ptes(VMX_EPT_READABLE_MASK,
enable_ept_ad_bits ? VMX_EPT_ACCESS_BIT : 0ull,
@@ -7061,8 +7320,6 @@ static __init int hardware_setup(void)
else
kvm_disable_tdp();
- update_ple_window_actual_max();
-
/*
* Only enable PML when hardware supports PML feature, and both EPT
* and EPT A/D bit features are enabled -- PML depends on them to work.
@@ -7094,6 +7351,7 @@ static __init int hardware_setup(void)
init_vmcs_shadow_fields();
kvm_set_posted_intr_wakeup_handler(wakeup_handler);
+ nested_vmx_setup_ctls_msrs(&vmcs_config.nested, enable_apicv);
kvm_mce_cap_supported |= MCG_LMCE_P;
@@ -7122,7 +7380,7 @@ static __exit void hardware_unsetup(void)
*/
static int handle_pause(struct kvm_vcpu *vcpu)
{
- if (ple_gap)
+ if (!kvm_pause_in_guest(vcpu->kvm))
grow_ple_window(vcpu);
/*
@@ -7954,9 +8212,9 @@ static int handle_invept(struct kvm_vcpu *vcpu)
u64 eptp, gpa;
} operand;
- if (!(vmx->nested.nested_vmx_secondary_ctls_high &
+ if (!(vmx->nested.msrs.secondary_ctls_high &
SECONDARY_EXEC_ENABLE_EPT) ||
- !(vmx->nested.nested_vmx_ept_caps & VMX_EPT_INVEPT_BIT)) {
+ !(vmx->nested.msrs.ept_caps & VMX_EPT_INVEPT_BIT)) {
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
@@ -7967,7 +8225,7 @@ static int handle_invept(struct kvm_vcpu *vcpu)
vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
- types = (vmx->nested.nested_vmx_ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6;
+ types = (vmx->nested.msrs.ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6;
if (type >= 32 || !(types & (1 << type))) {
nested_vmx_failValid(vcpu,
@@ -8018,9 +8276,9 @@ static int handle_invvpid(struct kvm_vcpu *vcpu)
u64 gla;
} operand;
- if (!(vmx->nested.nested_vmx_secondary_ctls_high &
+ if (!(vmx->nested.msrs.secondary_ctls_high &
SECONDARY_EXEC_ENABLE_VPID) ||
- !(vmx->nested.nested_vmx_vpid_caps & VMX_VPID_INVVPID_BIT)) {
+ !(vmx->nested.msrs.vpid_caps & VMX_VPID_INVVPID_BIT)) {
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
@@ -8031,7 +8289,7 @@ static int handle_invvpid(struct kvm_vcpu *vcpu)
vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
- types = (vmx->nested.nested_vmx_vpid_caps &
+ types = (vmx->nested.msrs.vpid_caps &
VMX_VPID_EXTENT_SUPPORTED_MASK) >> 8;
if (type >= 32 || !(types & (1 << type))) {
@@ -8125,11 +8383,11 @@ static bool valid_ept_address(struct kvm_vcpu *vcpu, u64 address)
/* Check for memory type validity */
switch (address & VMX_EPTP_MT_MASK) {
case VMX_EPTP_MT_UC:
- if (!(vmx->nested.nested_vmx_ept_caps & VMX_EPTP_UC_BIT))
+ if (!(vmx->nested.msrs.ept_caps & VMX_EPTP_UC_BIT))
return false;
break;
case VMX_EPTP_MT_WB:
- if (!(vmx->nested.nested_vmx_ept_caps & VMX_EPTP_WB_BIT))
+ if (!(vmx->nested.msrs.ept_caps & VMX_EPTP_WB_BIT))
return false;
break;
default:
@@ -8146,7 +8404,7 @@ static bool valid_ept_address(struct kvm_vcpu *vcpu, u64 address)
/* AD, if set, should be supported */
if (address & VMX_EPTP_AD_ENABLE_BIT) {
- if (!(vmx->nested.nested_vmx_ept_caps & VMX_EPT_AD_BIT))
+ if (!(vmx->nested.msrs.ept_caps & VMX_EPT_AD_BIT))
return false;
}
@@ -8790,7 +9048,8 @@ static void dump_vmcs(void)
pr_err("DebugCtl = 0x%016llx DebugExceptions = 0x%016lx\n",
vmcs_read64(GUEST_IA32_DEBUGCTL),
vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS));
- if (vmentry_ctl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
+ if (cpu_has_load_perf_global_ctrl &&
+ vmentry_ctl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
pr_err("PerfGlobCtl = 0x%016llx\n",
vmcs_read64(GUEST_IA32_PERF_GLOBAL_CTRL));
if (vmentry_ctl & VM_ENTRY_LOAD_BNDCFGS)
@@ -8826,7 +9085,8 @@ static void dump_vmcs(void)
pr_err("EFER = 0x%016llx PAT = 0x%016llx\n",
vmcs_read64(HOST_IA32_EFER),
vmcs_read64(HOST_IA32_PAT));
- if (vmexit_ctl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
+ if (cpu_has_load_perf_global_ctrl &&
+ vmexit_ctl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
pr_err("PerfGlobCtl = 0x%016llx\n",
vmcs_read64(HOST_IA32_PERF_GLOBAL_CTRL));
@@ -9017,7 +9277,7 @@ static void vmx_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
} else {
sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE;
sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
- vmx_flush_tlb_ept_only(vcpu);
+ vmx_flush_tlb(vcpu, true);
}
vmcs_write32(SECONDARY_VM_EXEC_CONTROL, sec_exec_control);
@@ -9045,7 +9305,7 @@ static void vmx_set_apic_access_page_addr(struct kvm_vcpu *vcpu, hpa_t hpa)
!nested_cpu_has2(get_vmcs12(&vmx->vcpu),
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
vmcs_write64(APIC_ACCESS_ADDR, hpa);
- vmx_flush_tlb_ept_only(vcpu);
+ vmx_flush_tlb(vcpu, true);
}
}
@@ -9178,9 +9438,9 @@ static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
/* We need to handle NMIs before interrupts are enabled */
if (is_nmi(exit_intr_info)) {
- kvm_before_handle_nmi(&vmx->vcpu);
+ kvm_before_interrupt(&vmx->vcpu);
asm("int $2");
- kvm_after_handle_nmi(&vmx->vcpu);
+ kvm_after_interrupt(&vmx->vcpu);
}
}
@@ -9225,9 +9485,21 @@ static void vmx_handle_external_intr(struct kvm_vcpu *vcpu)
}
STACK_FRAME_NON_STANDARD(vmx_handle_external_intr);
-static bool vmx_has_high_real_mode_segbase(void)
+static bool vmx_has_emulated_msr(int index)
{
- return enable_unrestricted_guest || emulate_invalid_guest_state;
+ switch (index) {
+ case MSR_IA32_SMBASE:
+ /*
+ * We cannot do SMM unless we can run the guest in big
+ * real mode.
+ */
+ return enable_unrestricted_guest || emulate_invalid_guest_state;
+ case MSR_AMD64_VIRT_SPEC_CTRL:
+ /* This is AMD only. */
+ return false;
+ default:
+ return true;
+ }
}
static bool vmx_mpx_supported(void)
@@ -9242,12 +9514,6 @@ static bool vmx_xsaves_supported(void)
SECONDARY_EXEC_XSAVES;
}
-static bool vmx_umip_emulated(void)
-{
- return vmcs_config.cpu_based_2nd_exec_ctrl &
- SECONDARY_EXEC_DESC;
-}
-
static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx)
{
u32 exit_intr_info;
@@ -9403,7 +9669,7 @@ static void vmx_arm_hv_timer(struct kvm_vcpu *vcpu)
static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
- unsigned long cr3, cr4;
+ unsigned long cr3, cr4, evmcs_rsp;
/* Record the guest's net vcpu time for enforced NMI injections. */
if (unlikely(!enable_vnmi &&
@@ -9465,10 +9731,13 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
* is no need to worry about the conditional branch over the wrmsr
* being speculatively taken.
*/
- if (vmx->spec_ctrl)
- native_wrmsrl(MSR_IA32_SPEC_CTRL, vmx->spec_ctrl);
+ x86_spec_ctrl_set_guest(vmx->spec_ctrl, 0);
vmx->__launched = vmx->loaded_vmcs->launched;
+
+ evmcs_rsp = static_branch_unlikely(&enable_evmcs) ?
+ (unsigned long)&current_evmcs->host_rsp : 0;
+
asm(
/* Store host registers */
"push %%" _ASM_DX "; push %%" _ASM_BP ";"
@@ -9477,15 +9746,21 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
"cmp %%" _ASM_SP ", %c[host_rsp](%0) \n\t"
"je 1f \n\t"
"mov %%" _ASM_SP ", %c[host_rsp](%0) \n\t"
+ /* Avoid VMWRITE when Enlightened VMCS is in use */
+ "test %%" _ASM_SI ", %%" _ASM_SI " \n\t"
+ "jz 2f \n\t"
+ "mov %%" _ASM_SP ", (%%" _ASM_SI ") \n\t"
+ "jmp 1f \n\t"
+ "2: \n\t"
__ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
"1: \n\t"
/* Reload cr2 if changed */
"mov %c[cr2](%0), %%" _ASM_AX " \n\t"
"mov %%cr2, %%" _ASM_DX " \n\t"
"cmp %%" _ASM_AX ", %%" _ASM_DX " \n\t"
- "je 2f \n\t"
+ "je 3f \n\t"
"mov %%" _ASM_AX", %%cr2 \n\t"
- "2: \n\t"
+ "3: \n\t"
/* Check if vmlaunch of vmresume is needed */
"cmpl $0, %c[launched](%0) \n\t"
/* Load guest registers. Don't clobber flags. */
@@ -9554,7 +9829,7 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
".global vmx_return \n\t"
"vmx_return: " _ASM_PTR " 2b \n\t"
".popsection"
- : : "c"(vmx), "d"((unsigned long)HOST_RSP),
+ : : "c"(vmx), "d"((unsigned long)HOST_RSP), "S"(evmcs_rsp),
[launched]"i"(offsetof(struct vcpu_vmx, __launched)),
[fail]"i"(offsetof(struct vcpu_vmx, fail)),
[host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
@@ -9579,10 +9854,10 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
[wordsize]"i"(sizeof(ulong))
: "cc", "memory"
#ifdef CONFIG_X86_64
- , "rax", "rbx", "rdi", "rsi"
+ , "rax", "rbx", "rdi"
, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
#else
- , "eax", "ebx", "edi", "esi"
+ , "eax", "ebx", "edi"
#endif
);
@@ -9604,12 +9879,16 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
vmx->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
- if (vmx->spec_ctrl)
- native_wrmsrl(MSR_IA32_SPEC_CTRL, 0);
+ x86_spec_ctrl_restore_host(vmx->spec_ctrl, 0);
/* Eliminate branch target predictions from guest mode */
vmexit_fill_RSB();
+ /* All fields are clean at this point */
+ if (static_branch_unlikely(&enable_evmcs))
+ current_evmcs->hv_clean_fields |=
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
+
/* MSR_IA32_DEBUGCTLMSR is zeroed on vmexit. Restore it if needed */
if (vmx->host_debugctlmsr)
update_debugctlmsr(vmx->host_debugctlmsr);
@@ -9646,14 +9925,6 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
__write_pkru(vmx->host_pkru);
}
- /*
- * the KVM_REQ_EVENT optimization bit is only on for one entry, and if
- * we did not inject a still-pending event to L1 now because of
- * nested_run_pending, we need to re-enable this bit.
- */
- if (vmx->nested.nested_run_pending)
- kvm_make_request(KVM_REQ_EVENT, vcpu);
-
vmx->nested.nested_run_pending = 0;
vmx->idt_vectoring_info = 0;
@@ -9670,6 +9941,17 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
}
STACK_FRAME_NON_STANDARD(vmx_vcpu_run);
+static struct kvm *vmx_vm_alloc(void)
+{
+ struct kvm_vmx *kvm_vmx = kzalloc(sizeof(struct kvm_vmx), GFP_KERNEL);
+ return &kvm_vmx->kvm;
+}
+
+static void vmx_vm_free(struct kvm *kvm)
+{
+ kfree(to_kvm_vmx(kvm));
+}
+
static void vmx_switch_vmcs(struct kvm_vcpu *vcpu, struct loaded_vmcs *vmcs)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -9777,14 +10059,15 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
goto free_vmcs;
}
- if (enable_ept) {
+ if (enable_ept && !enable_unrestricted_guest) {
err = init_rmode_identity_map(kvm);
if (err)
goto free_vmcs;
}
if (nested) {
- nested_vmx_setup_ctls_msrs(vmx);
+ nested_vmx_setup_ctls_msrs(&vmx->nested.msrs,
+ kvm_vcpu_apicv_active(&vmx->vcpu));
vmx->nested.vpid02 = allocate_vpid();
}
@@ -9817,6 +10100,13 @@ free_vcpu:
return ERR_PTR(err);
}
+static int vmx_vm_init(struct kvm *kvm)
+{
+ if (!ple_gap)
+ kvm->arch.pause_in_guest = true;
+ return 0;
+}
+
static void __init vmx_check_processor_compat(void *rtn)
{
struct vmcs_config vmcs_conf;
@@ -9824,6 +10114,7 @@ static void __init vmx_check_processor_compat(void *rtn)
*(int *)rtn = 0;
if (setup_vmcs_config(&vmcs_conf) < 0)
*(int *)rtn = -EIO;
+ nested_vmx_setup_ctls_msrs(&vmcs_conf.nested, enable_apicv);
if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
smp_processor_id());
@@ -9911,12 +10202,12 @@ static void nested_vmx_cr_fixed1_bits_update(struct kvm_vcpu *vcpu)
struct vcpu_vmx *vmx = to_vmx(vcpu);
struct kvm_cpuid_entry2 *entry;
- vmx->nested.nested_vmx_cr0_fixed1 = 0xffffffff;
- vmx->nested.nested_vmx_cr4_fixed1 = X86_CR4_PCE;
+ vmx->nested.msrs.cr0_fixed1 = 0xffffffff;
+ vmx->nested.msrs.cr4_fixed1 = X86_CR4_PCE;
#define cr4_fixed1_update(_cr4_mask, _reg, _cpuid_mask) do { \
if (entry && (entry->_reg & (_cpuid_mask))) \
- vmx->nested.nested_vmx_cr4_fixed1 |= (_cr4_mask); \
+ vmx->nested.msrs.cr4_fixed1 |= (_cr4_mask); \
} while (0)
entry = kvm_find_cpuid_entry(vcpu, 0x1, 0);
@@ -10013,7 +10304,7 @@ static int nested_ept_init_mmu_context(struct kvm_vcpu *vcpu)
kvm_mmu_unload(vcpu);
kvm_init_shadow_ept_mmu(vcpu,
- to_vmx(vcpu)->nested.nested_vmx_ept_caps &
+ to_vmx(vcpu)->nested.msrs.ept_caps &
VMX_EPT_EXECUTE_ONLY_BIT,
nested_ept_ad_enabled(vcpu));
vcpu->arch.mmu.set_cr3 = vmx_set_cr3;
@@ -10311,6 +10602,16 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
return true;
}
+static int nested_vmx_check_apic_access_controls(struct kvm_vcpu *vcpu,
+ struct vmcs12 *vmcs12)
+{
+ if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) &&
+ !page_address_valid(vcpu, vmcs12->apic_access_addr))
+ return -EINVAL;
+ else
+ return 0;
+}
+
static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu,
struct vmcs12 *vmcs12)
{
@@ -10879,11 +11180,8 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
}
- if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
- vmcs_write64(TSC_OFFSET,
- vcpu->arch.tsc_offset + vmcs12->tsc_offset);
- else
- vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset);
+ vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset);
+
if (kvm_has_tsc_control)
decache_tsc_multiplier(vmx);
@@ -10925,7 +11223,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
}
} else if (nested_cpu_has2(vmcs12,
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
- vmx_flush_tlb_ept_only(vcpu);
+ vmx_flush_tlb(vcpu, true);
}
/*
@@ -10952,6 +11250,16 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
/* Note: modifies VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */
vmx_set_efer(vcpu, vcpu->arch.efer);
+ /*
+ * Guest state is invalid and unrestricted guest is disabled,
+ * which means L1 attempted VMEntry to L2 with invalid state.
+ * Fail the VMEntry.
+ */
+ if (vmx->emulation_required) {
+ *entry_failure_code = ENTRY_FAIL_DEFAULT;
+ return 1;
+ }
+
/* Shadow page tables on either EPT or shadow page tables. */
if (nested_vmx_load_cr3(vcpu, vmcs12->guest_cr3, nested_cpu_has_ept(vmcs12),
entry_failure_code))
@@ -10965,6 +11273,19 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
return 0;
}
+static int nested_vmx_check_nmi_controls(struct vmcs12 *vmcs12)
+{
+ if (!nested_cpu_has_nmi_exiting(vmcs12) &&
+ nested_cpu_has_virtual_nmis(vmcs12))
+ return -EINVAL;
+
+ if (!nested_cpu_has_virtual_nmis(vmcs12) &&
+ nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING))
+ return -EINVAL;
+
+ return 0;
+}
+
static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -10979,6 +11300,9 @@ static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
if (nested_vmx_check_msr_bitmap_controls(vcpu, vmcs12))
return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
+ if (nested_vmx_check_apic_access_controls(vcpu, vmcs12))
+ return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
+
if (nested_vmx_check_tpr_shadow_controls(vcpu, vmcs12))
return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
@@ -10992,26 +11316,29 @@ static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
if (!vmx_control_verify(vmcs12->cpu_based_vm_exec_control,
- vmx->nested.nested_vmx_procbased_ctls_low,
- vmx->nested.nested_vmx_procbased_ctls_high) ||
+ vmx->nested.msrs.procbased_ctls_low,
+ vmx->nested.msrs.procbased_ctls_high) ||
(nested_cpu_has(vmcs12, CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
!vmx_control_verify(vmcs12->secondary_vm_exec_control,
- vmx->nested.nested_vmx_secondary_ctls_low,
- vmx->nested.nested_vmx_secondary_ctls_high)) ||
+ vmx->nested.msrs.secondary_ctls_low,
+ vmx->nested.msrs.secondary_ctls_high)) ||
!vmx_control_verify(vmcs12->pin_based_vm_exec_control,
- vmx->nested.nested_vmx_pinbased_ctls_low,
- vmx->nested.nested_vmx_pinbased_ctls_high) ||
+ vmx->nested.msrs.pinbased_ctls_low,
+ vmx->nested.msrs.pinbased_ctls_high) ||
!vmx_control_verify(vmcs12->vm_exit_controls,
- vmx->nested.nested_vmx_exit_ctls_low,
- vmx->nested.nested_vmx_exit_ctls_high) ||
+ vmx->nested.msrs.exit_ctls_low,
+ vmx->nested.msrs.exit_ctls_high) ||
!vmx_control_verify(vmcs12->vm_entry_controls,
- vmx->nested.nested_vmx_entry_ctls_low,
- vmx->nested.nested_vmx_entry_ctls_high))
+ vmx->nested.msrs.entry_ctls_low,
+ vmx->nested.msrs.entry_ctls_high))
+ return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
+
+ if (nested_vmx_check_nmi_controls(vmcs12))
return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
if (nested_cpu_has_vmfunc(vmcs12)) {
if (vmcs12->vm_function_control &
- ~vmx->nested.nested_vmx_vmfunc_controls)
+ ~vmx->nested.msrs.vmfunc_controls)
return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
if (nested_cpu_has_eptp_switching(vmcs12)) {
@@ -11097,6 +11424,7 @@ static int enter_vmx_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
u32 msr_entry_idx;
u32 exit_qual;
+ int r;
enter_guest_mode(vcpu);
@@ -11106,26 +11434,21 @@ static int enter_vmx_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
vmx_switch_vmcs(vcpu, &vmx->nested.vmcs02);
vmx_segment_cache_clear(vmx);
- if (prepare_vmcs02(vcpu, vmcs12, from_vmentry, &exit_qual)) {
- leave_guest_mode(vcpu);
- vmx_switch_vmcs(vcpu, &vmx->vmcs01);
- nested_vmx_entry_failure(vcpu, vmcs12,
- EXIT_REASON_INVALID_STATE, exit_qual);
- return 1;
- }
+ if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
+ vcpu->arch.tsc_offset += vmcs12->tsc_offset;
+
+ r = EXIT_REASON_INVALID_STATE;
+ if (prepare_vmcs02(vcpu, vmcs12, from_vmentry, &exit_qual))
+ goto fail;
nested_get_vmcs12_pages(vcpu, vmcs12);
+ r = EXIT_REASON_MSR_LOAD_FAIL;
msr_entry_idx = nested_vmx_load_msr(vcpu,
vmcs12->vm_entry_msr_load_addr,
vmcs12->vm_entry_msr_load_count);
- if (msr_entry_idx) {
- leave_guest_mode(vcpu);
- vmx_switch_vmcs(vcpu, &vmx->vmcs01);
- nested_vmx_entry_failure(vcpu, vmcs12,
- EXIT_REASON_MSR_LOAD_FAIL, msr_entry_idx);
- return 1;
- }
+ if (msr_entry_idx)
+ goto fail;
/*
* Note no nested_vmx_succeed or nested_vmx_fail here. At this point
@@ -11134,6 +11457,14 @@ static int enter_vmx_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
* the success flag) when L2 exits (see nested_vmx_vmexit()).
*/
return 0;
+
+fail:
+ if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
+ vcpu->arch.tsc_offset -= vmcs12->tsc_offset;
+ leave_guest_mode(vcpu);
+ vmx_switch_vmcs(vcpu, &vmx->vmcs01);
+ nested_vmx_entry_failure(vcpu, vmcs12, r, exit_qual);
+ return 1;
}
/*
@@ -11293,7 +11624,7 @@ static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu,
} else if (vcpu->arch.nmi_injected) {
vmcs12->idt_vectoring_info_field =
INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR;
- } else if (vcpu->arch.interrupt.pending) {
+ } else if (vcpu->arch.interrupt.injected) {
nr = vcpu->arch.interrupt.nr;
idt_vectoring = nr | VECTORING_INFO_VALID_MASK;
@@ -11705,6 +12036,9 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
leave_guest_mode(vcpu);
+ if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
+ vcpu->arch.tsc_offset -= vmcs12->tsc_offset;
+
if (likely(!vmx->fail)) {
if (exit_reason == -1)
sync_vmcs12(vcpu, vmcs12);
@@ -11742,7 +12076,7 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
} else if (!nested_cpu_has_ept(vmcs12) &&
nested_cpu_has2(vmcs12,
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
- vmx_flush_tlb_ept_only(vcpu);
+ vmx_flush_tlb(vcpu, true);
}
/* This is needed for same reason as it was needed in prepare_vmcs02 */
@@ -11901,10 +12235,16 @@ static inline int u64_shl_div_u64(u64 a, unsigned int shift,
static int vmx_set_hv_timer(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc)
{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u64 tscl = rdtsc();
- u64 guest_tscl = kvm_read_l1_tsc(vcpu, tscl);
- u64 delta_tsc = max(guest_deadline_tsc, guest_tscl) - guest_tscl;
+ struct vcpu_vmx *vmx;
+ u64 tscl, guest_tscl, delta_tsc;
+
+ if (kvm_mwait_in_guest(vcpu->kvm))
+ return -EOPNOTSUPP;
+
+ vmx = to_vmx(vcpu);
+ tscl = rdtsc();
+ guest_tscl = kvm_read_l1_tsc(vcpu, tscl);
+ delta_tsc = max(guest_deadline_tsc, guest_tscl) - guest_tscl;
/* Convert to host delta tsc if tsc scaling is enabled */
if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio &&
@@ -11941,7 +12281,7 @@ static void vmx_cancel_hv_timer(struct kvm_vcpu *vcpu)
static void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
- if (ple_gap)
+ if (!kvm_pause_in_guest(vcpu->kvm))
shrink_ple_window(vcpu);
}
@@ -12210,7 +12550,7 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu));
vcpu_info.vector = irq.vector;
- trace_kvm_pi_irte_update(vcpu->vcpu_id, host_irq, e->gsi,
+ trace_kvm_pi_irte_update(host_irq, vcpu->vcpu_id, e->gsi,
vcpu_info.vector, vcpu_info.pi_desc_addr, set);
if (set)
@@ -12259,6 +12599,7 @@ static int vmx_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
vmx->nested.smm.vmxon = vmx->nested.vmxon;
vmx->nested.vmxon = false;
+ vmx_clear_hlt(vcpu);
return 0;
}
@@ -12298,7 +12639,11 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.hardware_enable = hardware_enable,
.hardware_disable = hardware_disable,
.cpu_has_accelerated_tpr = report_flexpriority,
- .cpu_has_high_real_mode_segbase = vmx_has_high_real_mode_segbase,
+ .has_emulated_msr = vmx_has_emulated_msr,
+
+ .vm_init = vmx_vm_init,
+ .vm_alloc = vmx_vm_alloc,
+ .vm_free = vmx_vm_free,
.vcpu_create = vmx_create_vcpu,
.vcpu_free = vmx_free_vcpu,
@@ -12367,6 +12712,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.deliver_posted_interrupt = vmx_deliver_posted_interrupt,
.set_tss_addr = vmx_set_tss_addr,
+ .set_identity_map_addr = vmx_set_identity_map_addr,
.get_tdp_level = get_ept_level,
.get_mt_mask = vmx_get_mt_mask,
@@ -12383,6 +12729,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
+ .read_l1_tsc_offset = vmx_read_l1_tsc_offset,
.write_tsc_offset = vmx_write_tsc_offset,
.set_tdp_cr3 = vmx_set_cr3,
@@ -12425,7 +12772,38 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
static int __init vmx_init(void)
{
- int r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
+ int r;
+
+#if IS_ENABLED(CONFIG_HYPERV)
+ /*
+ * Enlightened VMCS usage should be recommended and the host needs
+ * to support eVMCS v1 or above. We can also disable eVMCS support
+ * with module parameter.
+ */
+ if (enlightened_vmcs &&
+ ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED &&
+ (ms_hyperv.nested_features & HV_X64_ENLIGHTENED_VMCS_VERSION) >=
+ KVM_EVMCS_VERSION) {
+ int cpu;
+
+ /* Check that we have assist pages on all online CPUs */
+ for_each_online_cpu(cpu) {
+ if (!hv_get_vp_assist_page(cpu)) {
+ enlightened_vmcs = false;
+ break;
+ }
+ }
+
+ if (enlightened_vmcs) {
+ pr_info("KVM: vmx: using Hyper-V Enlightened VMCS\n");
+ static_branch_enable(&enable_evmcs);
+ }
+ } else {
+ enlightened_vmcs = false;
+ }
+#endif
+
+ r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
__alignof__(struct vcpu_vmx), THIS_MODULE);
if (r)
return r;
@@ -12446,6 +12824,29 @@ static void __exit vmx_exit(void)
#endif
kvm_exit();
+
+#if IS_ENABLED(CONFIG_HYPERV)
+ if (static_branch_unlikely(&enable_evmcs)) {
+ int cpu;
+ struct hv_vp_assist_page *vp_ap;
+ /*
+ * Reset everything to support using non-enlightened VMCS
+ * access later (e.g. when we reload the module with
+ * enlightened_vmcs=0)
+ */
+ for_each_online_cpu(cpu) {
+ vp_ap = hv_get_vp_assist_page(cpu);
+
+ if (!vp_ap)
+ continue;
+
+ vp_ap->current_nested_vmcs = 0;
+ vp_ap->enlighten_vmentry = 0;
+ }
+
+ static_branch_disable(&enable_evmcs);
+ }
+#endif
}
module_init(vmx_init)
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-08 11:57:21 +0100