summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/x86/include/asm/kvm_host.h1
-rw-r--r--arch/x86/include/asm/vmxfeatures.h2
-rw-r--r--arch/x86/kvm/Kconfig11
-rw-r--r--arch/x86/kvm/lapic.c39
-rw-r--r--arch/x86/kvm/lapic.h2
-rw-r--r--arch/x86/kvm/mmu/mmu.c43
-rw-r--r--arch/x86/kvm/mmu/spte.h9
-rw-r--r--arch/x86/kvm/mmu/tdp_iter.h2
-rw-r--r--arch/x86/kvm/mmu/tdp_mmu.c2
-rw-r--r--arch/x86/kvm/svm/sev.c19
-rw-r--r--arch/x86/kvm/svm/svm.c69
-rw-r--r--arch/x86/kvm/svm/svm.h4
-rw-r--r--arch/x86/kvm/vmx/nested.c5
-rw-r--r--arch/x86/kvm/vmx/vmx.c11
-rw-r--r--arch/x86/kvm/x86.c11
15 files changed, 161 insertions, 69 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index ece45b3f6f20..f8ca74e7678f 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -2154,6 +2154,7 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
void *insn, int insn_len);
+void kvm_mmu_print_sptes(struct kvm_vcpu *vcpu, gpa_t gpa, const char *msg);
void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
void kvm_mmu_invalidate_addr(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
u64 addr, unsigned long roots);
diff --git a/arch/x86/include/asm/vmxfeatures.h b/arch/x86/include/asm/vmxfeatures.h
index 266daf5b5b84..695f36664889 100644
--- a/arch/x86/include/asm/vmxfeatures.h
+++ b/arch/x86/include/asm/vmxfeatures.h
@@ -77,7 +77,7 @@
#define VMX_FEATURE_ENCLS_EXITING ( 2*32+ 15) /* "" VM-Exit on ENCLS (leaf dependent) */
#define VMX_FEATURE_RDSEED_EXITING ( 2*32+ 16) /* "" VM-Exit on RDSEED */
#define VMX_FEATURE_PAGE_MOD_LOGGING ( 2*32+ 17) /* "pml" Log dirty pages into buffer */
-#define VMX_FEATURE_EPT_VIOLATION_VE ( 2*32+ 18) /* "" Conditionally reflect EPT violations as #VE exceptions */
+#define VMX_FEATURE_EPT_VIOLATION_VE ( 2*32+ 18) /* Conditionally reflect EPT violations as #VE exceptions */
#define VMX_FEATURE_PT_CONCEAL_VMX ( 2*32+ 19) /* "" Suppress VMX indicators in Processor Trace */
#define VMX_FEATURE_XSAVES ( 2*32+ 20) /* "" Enable XSAVES and XRSTORS in guest */
#define VMX_FEATURE_MODE_BASED_EPT_EXEC ( 2*32+ 22) /* "ept_mode_based_exec" Enable separate EPT EXEC bits for supervisor vs. user */
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index d64fb2b3eb69..fec95a770270 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -44,6 +44,7 @@ config KVM
select KVM_VFIO
select HAVE_KVM_PM_NOTIFIER if PM
select KVM_GENERIC_HARDWARE_ENABLING
+ select KVM_WERROR if WERROR
help
Support hosting fully virtualized guest machines using hardware
virtualization extensions. You will need a fairly recent
@@ -66,7 +67,7 @@ config KVM_WERROR
# FRAME_WARN, i.e. KVM_WERROR=y with KASAN=y requires special tuning.
# Building KVM with -Werror and KASAN is still doable via enabling
# the kernel-wide WERROR=y.
- depends on KVM && EXPERT && !KASAN
+ depends on KVM && ((EXPERT && !KASAN) || WERROR)
help
Add -Werror to the build flags for KVM.
@@ -97,15 +98,17 @@ config KVM_INTEL
config KVM_INTEL_PROVE_VE
bool "Check that guests do not receive #VE exceptions"
- default KVM_PROVE_MMU || DEBUG_KERNEL
- depends on KVM_INTEL
+ depends on KVM_INTEL && EXPERT
help
-
Checks that KVM's page table management code will not incorrectly
let guests receive a virtualization exception. Virtualization
exceptions will be trapped by the hypervisor rather than injected
in the guest.
+ Note: some CPUs appear to generate spurious EPT Violations #VEs
+ that trigger KVM's WARN, in particular with eptad=0 and/or nested
+ virtualization.
+
If unsure, say N.
config X86_SGX_KVM
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index ebf41023be38..acd7d48100a1 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -59,7 +59,17 @@
#define MAX_APIC_VECTOR 256
#define APIC_VECTORS_PER_REG 32
-static bool lapic_timer_advance_dynamic __read_mostly;
+/*
+ * Enable local APIC timer advancement (tscdeadline mode only) with adaptive
+ * tuning. When enabled, KVM programs the host timer event to fire early, i.e.
+ * before the deadline expires, to account for the delay between taking the
+ * VM-Exit (to inject the guest event) and the subsequent VM-Enter to resume
+ * the guest, i.e. so that the interrupt arrives in the guest with minimal
+ * latency relative to the deadline programmed by the guest.
+ */
+static bool lapic_timer_advance __read_mostly = true;
+module_param(lapic_timer_advance, bool, 0444);
+
#define LAPIC_TIMER_ADVANCE_ADJUST_MIN 100 /* clock cycles */
#define LAPIC_TIMER_ADVANCE_ADJUST_MAX 10000 /* clock cycles */
#define LAPIC_TIMER_ADVANCE_NS_INIT 1000
@@ -1854,16 +1864,14 @@ static void __kvm_wait_lapic_expire(struct kvm_vcpu *vcpu)
guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc());
trace_kvm_wait_lapic_expire(vcpu->vcpu_id, guest_tsc - tsc_deadline);
- if (lapic_timer_advance_dynamic) {
- adjust_lapic_timer_advance(vcpu, guest_tsc - tsc_deadline);
- /*
- * If the timer fired early, reread the TSC to account for the
- * overhead of the above adjustment to avoid waiting longer
- * than is necessary.
- */
- if (guest_tsc < tsc_deadline)
- guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc());
- }
+ adjust_lapic_timer_advance(vcpu, guest_tsc - tsc_deadline);
+
+ /*
+ * If the timer fired early, reread the TSC to account for the overhead
+ * of the above adjustment to avoid waiting longer than is necessary.
+ */
+ if (guest_tsc < tsc_deadline)
+ guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc());
if (guest_tsc < tsc_deadline)
__wait_lapic_expire(vcpu, tsc_deadline - guest_tsc);
@@ -2812,7 +2820,7 @@ static enum hrtimer_restart apic_timer_fn(struct hrtimer *data)
return HRTIMER_NORESTART;
}
-int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns)
+int kvm_create_lapic(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic;
@@ -2845,13 +2853,8 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns)
hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
HRTIMER_MODE_ABS_HARD);
apic->lapic_timer.timer.function = apic_timer_fn;
- if (timer_advance_ns == -1) {
+ if (lapic_timer_advance)
apic->lapic_timer.timer_advance_ns = LAPIC_TIMER_ADVANCE_NS_INIT;
- lapic_timer_advance_dynamic = true;
- } else {
- apic->lapic_timer.timer_advance_ns = timer_advance_ns;
- lapic_timer_advance_dynamic = false;
- }
/*
* Stuff the APIC ENABLE bit in lieu of temporarily incrementing
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 0a0ea4b5dd8c..a69e706b9080 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -85,7 +85,7 @@ struct kvm_lapic {
struct dest_map;
-int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns);
+int kvm_create_lapic(struct kvm_vcpu *vcpu);
void kvm_free_lapic(struct kvm_vcpu *vcpu);
int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 662f62dfb2aa..b7b4426a7221 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -336,16 +336,19 @@ static int is_cpuid_PSE36(void)
#ifdef CONFIG_X86_64
static void __set_spte(u64 *sptep, u64 spte)
{
+ KVM_MMU_WARN_ON(is_ept_ve_possible(spte));
WRITE_ONCE(*sptep, spte);
}
static void __update_clear_spte_fast(u64 *sptep, u64 spte)
{
+ KVM_MMU_WARN_ON(is_ept_ve_possible(spte));
WRITE_ONCE(*sptep, spte);
}
static u64 __update_clear_spte_slow(u64 *sptep, u64 spte)
{
+ KVM_MMU_WARN_ON(is_ept_ve_possible(spte));
return xchg(sptep, spte);
}
@@ -4101,23 +4104,31 @@ static int get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, int *root_level
return leaf;
}
-/* return true if reserved bit(s) are detected on a valid, non-MMIO SPTE. */
-static bool get_mmio_spte(struct kvm_vcpu *vcpu, u64 addr, u64 *sptep)
+static int get_sptes_lockless(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
+ int *root_level)
{
- u64 sptes[PT64_ROOT_MAX_LEVEL + 1];
- struct rsvd_bits_validate *rsvd_check;
- int root, leaf, level;
- bool reserved = false;
+ int leaf;
walk_shadow_page_lockless_begin(vcpu);
if (is_tdp_mmu_active(vcpu))
- leaf = kvm_tdp_mmu_get_walk(vcpu, addr, sptes, &root);
+ leaf = kvm_tdp_mmu_get_walk(vcpu, addr, sptes, root_level);
else
- leaf = get_walk(vcpu, addr, sptes, &root);
+ leaf = get_walk(vcpu, addr, sptes, root_level);
walk_shadow_page_lockless_end(vcpu);
+ return leaf;
+}
+/* return true if reserved bit(s) are detected on a valid, non-MMIO SPTE. */
+static bool get_mmio_spte(struct kvm_vcpu *vcpu, u64 addr, u64 *sptep)
+{
+ u64 sptes[PT64_ROOT_MAX_LEVEL + 1];
+ struct rsvd_bits_validate *rsvd_check;
+ int root, leaf, level;
+ bool reserved = false;
+
+ leaf = get_sptes_lockless(vcpu, addr, sptes, &root);
if (unlikely(leaf < 0)) {
*sptep = 0ull;
return reserved;
@@ -5921,6 +5932,22 @@ emulate:
}
EXPORT_SYMBOL_GPL(kvm_mmu_page_fault);
+void kvm_mmu_print_sptes(struct kvm_vcpu *vcpu, gpa_t gpa, const char *msg)
+{
+ u64 sptes[PT64_ROOT_MAX_LEVEL + 1];
+ int root_level, leaf, level;
+
+ leaf = get_sptes_lockless(vcpu, gpa, sptes, &root_level);
+ if (unlikely(leaf < 0))
+ return;
+
+ pr_err("%s %llx", msg, gpa);
+ for (level = root_level; level >= leaf; level--)
+ pr_cont(", spte[%d] = 0x%llx", level, sptes[level]);
+ pr_cont("\n");
+}
+EXPORT_SYMBOL_GPL(kvm_mmu_print_sptes);
+
static void __kvm_mmu_invalidate_addr(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
u64 addr, hpa_t root_hpa)
{
diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h
index 5dd5405fa07a..52fa004a1fbc 100644
--- a/arch/x86/kvm/mmu/spte.h
+++ b/arch/x86/kvm/mmu/spte.h
@@ -3,6 +3,8 @@
#ifndef KVM_X86_MMU_SPTE_H
#define KVM_X86_MMU_SPTE_H
+#include <asm/vmx.h>
+
#include "mmu.h"
#include "mmu_internal.h"
@@ -276,6 +278,13 @@ static inline bool is_shadow_present_pte(u64 pte)
return !!(pte & SPTE_MMU_PRESENT_MASK);
}
+static inline bool is_ept_ve_possible(u64 spte)
+{
+ return (shadow_present_mask & VMX_EPT_SUPPRESS_VE_BIT) &&
+ !(spte & VMX_EPT_SUPPRESS_VE_BIT) &&
+ (spte & VMX_EPT_RWX_MASK) != VMX_EPT_MISCONFIG_WX_VALUE;
+}
+
/*
* Returns true if A/D bits are supported in hardware and are enabled by KVM.
* When enabled, KVM uses A/D bits for all non-nested MMUs. Because L1 can
diff --git a/arch/x86/kvm/mmu/tdp_iter.h b/arch/x86/kvm/mmu/tdp_iter.h
index fae559559a80..2880fd392e0c 100644
--- a/arch/x86/kvm/mmu/tdp_iter.h
+++ b/arch/x86/kvm/mmu/tdp_iter.h
@@ -21,11 +21,13 @@ static inline u64 kvm_tdp_mmu_read_spte(tdp_ptep_t sptep)
static inline u64 kvm_tdp_mmu_write_spte_atomic(tdp_ptep_t sptep, u64 new_spte)
{
+ KVM_MMU_WARN_ON(is_ept_ve_possible(new_spte));
return xchg(rcu_dereference(sptep), new_spte);
}
static inline void __kvm_tdp_mmu_write_spte(tdp_ptep_t sptep, u64 new_spte)
{
+ KVM_MMU_WARN_ON(is_ept_ve_possible(new_spte));
WRITE_ONCE(*rcu_dereference(sptep), new_spte);
}
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 1259dd63defc..36539c1b36cd 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -626,7 +626,7 @@ static inline int tdp_mmu_zap_spte_atomic(struct kvm *kvm,
* SPTEs.
*/
handle_changed_spte(kvm, iter->as_id, iter->gfn, iter->old_spte,
- 0, iter->level, true);
+ SHADOW_NONPRESENT_VALUE, iter->level, true);
return 0;
}
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 0623cfaa7bb0..95095a233a45 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -779,6 +779,14 @@ static int __sev_launch_update_vmsa(struct kvm *kvm, struct kvm_vcpu *vcpu,
*/
fpstate_set_confidential(&vcpu->arch.guest_fpu);
vcpu->arch.guest_state_protected = true;
+
+ /*
+ * SEV-ES guest mandates LBR Virtualization to be _always_ ON. Enable it
+ * only after setting guest_state_protected because KVM_SET_MSRS allows
+ * dynamic toggling of LBRV (for performance reason) on write access to
+ * MSR_IA32_DEBUGCTLMSR when guest_state_protected is not set.
+ */
+ svm_enable_lbrv(vcpu);
return 0;
}
@@ -2406,6 +2414,12 @@ void __init sev_hardware_setup(void)
if (!boot_cpu_has(X86_FEATURE_SEV_ES))
goto out;
+ if (!lbrv) {
+ WARN_ONCE(!boot_cpu_has(X86_FEATURE_LBRV),
+ "LBRV must be present for SEV-ES support");
+ goto out;
+ }
+
/* Has the system been allocated ASIDs for SEV-ES? */
if (min_sev_asid == 1)
goto out;
@@ -3216,7 +3230,6 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)
struct kvm_vcpu *vcpu = &svm->vcpu;
svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ES_ENABLE;
- svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
/*
* An SEV-ES guest requires a VMSA area that is a separate from the
@@ -3268,10 +3281,6 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)
/* Clear intercepts on selected MSRs */
set_msr_interception(vcpu, svm->msrpm, MSR_EFER, 1, 1);
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_CR_PAT, 1, 1);
- set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
- set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
- set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
- set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
}
void sev_init_vmcb(struct vcpu_svm *svm)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index c8dc25886c16..296c524988f9 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -99,6 +99,7 @@ static const struct svm_direct_access_msrs {
{ .index = MSR_IA32_SPEC_CTRL, .always = false },
{ .index = MSR_IA32_PRED_CMD, .always = false },
{ .index = MSR_IA32_FLUSH_CMD, .always = false },
+ { .index = MSR_IA32_DEBUGCTLMSR, .always = false },
{ .index = MSR_IA32_LASTBRANCHFROMIP, .always = false },
{ .index = MSR_IA32_LASTBRANCHTOIP, .always = false },
{ .index = MSR_IA32_LASTINTFROMIP, .always = false },
@@ -215,7 +216,7 @@ int vgif = true;
module_param(vgif, int, 0444);
/* enable/disable LBR virtualization */
-static int lbrv = true;
+int lbrv = true;
module_param(lbrv, int, 0444);
static int tsc_scaling = true;
@@ -990,7 +991,7 @@ void svm_copy_lbrs(struct vmcb *to_vmcb, struct vmcb *from_vmcb)
vmcb_mark_dirty(to_vmcb, VMCB_LBR);
}
-static void svm_enable_lbrv(struct kvm_vcpu *vcpu)
+void svm_enable_lbrv(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
@@ -1000,6 +1001,9 @@ static void svm_enable_lbrv(struct kvm_vcpu *vcpu)
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
+ if (sev_es_guest(vcpu->kvm))
+ set_msr_interception(vcpu, svm->msrpm, MSR_IA32_DEBUGCTLMSR, 1, 1);
+
/* Move the LBR msrs to the vmcb02 so that the guest can see them. */
if (is_guest_mode(vcpu))
svm_copy_lbrs(svm->vmcb, svm->vmcb01.ptr);
@@ -1009,6 +1013,8 @@ static void svm_disable_lbrv(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
+ KVM_BUG_ON(sev_es_guest(vcpu->kvm), vcpu->kvm);
+
svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
@@ -2822,10 +2828,24 @@ static int svm_get_msr_feature(struct kvm_msr_entry *msr)
return 0;
}
+static bool
+sev_es_prevent_msr_access(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
+{
+ return sev_es_guest(vcpu->kvm) &&
+ vcpu->arch.guest_state_protected &&
+ svm_msrpm_offset(msr_info->index) != MSR_INVALID &&
+ !msr_write_intercepted(vcpu, msr_info->index);
+}
+
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
{
struct vcpu_svm *svm = to_svm(vcpu);
+ if (sev_es_prevent_msr_access(vcpu, msr_info)) {
+ msr_info->data = 0;
+ return -EINVAL;
+ }
+
switch (msr_info->index) {
case MSR_AMD64_TSC_RATIO:
if (!msr_info->host_initiated &&
@@ -2976,6 +2996,10 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
u32 ecx = msr->index;
u64 data = msr->data;
+
+ if (sev_es_prevent_msr_access(vcpu, msr))
+ return -EINVAL;
+
switch (ecx) {
case MSR_AMD64_TSC_RATIO:
@@ -3846,16 +3870,27 @@ static void svm_enable_nmi_window(struct kvm_vcpu *vcpu)
struct vcpu_svm *svm = to_svm(vcpu);
/*
- * KVM should never request an NMI window when vNMI is enabled, as KVM
- * allows at most one to-be-injected NMI and one pending NMI, i.e. if
- * two NMIs arrive simultaneously, KVM will inject one and set
- * V_NMI_PENDING for the other. WARN, but continue with the standard
- * single-step approach to try and salvage the pending NMI.
+ * If NMIs are outright masked, i.e. the vCPU is already handling an
+ * NMI, and KVM has not yet intercepted an IRET, then there is nothing
+ * more to do at this time as KVM has already enabled IRET intercepts.
+ * If KVM has already intercepted IRET, then single-step over the IRET,
+ * as NMIs aren't architecturally unmasked until the IRET completes.
+ *
+ * If vNMI is enabled, KVM should never request an NMI window if NMIs
+ * are masked, as KVM allows at most one to-be-injected NMI and one
+ * pending NMI. If two NMIs arrive simultaneously, KVM will inject one
+ * NMI and set V_NMI_PENDING for the other, but if and only if NMIs are
+ * unmasked. KVM _will_ request an NMI window in some situations, e.g.
+ * if the vCPU is in an STI shadow or if GIF=0, KVM can't immediately
+ * inject the NMI. In those situations, KVM needs to single-step over
+ * the STI shadow or intercept STGI.
*/
- WARN_ON_ONCE(is_vnmi_enabled(svm));
+ if (svm_get_nmi_mask(vcpu)) {
+ WARN_ON_ONCE(is_vnmi_enabled(svm));
- if (svm_get_nmi_mask(vcpu) && !svm->awaiting_iret_completion)
- return; /* IRET will cause a vm exit */
+ if (!svm->awaiting_iret_completion)
+ return; /* IRET will cause a vm exit */
+ }
/*
* SEV-ES guests are responsible for signaling when a vCPU is ready to
@@ -5265,6 +5300,12 @@ static __init int svm_hardware_setup(void)
nrips = nrips && boot_cpu_has(X86_FEATURE_NRIPS);
+ if (lbrv) {
+ if (!boot_cpu_has(X86_FEATURE_LBRV))
+ lbrv = false;
+ else
+ pr_info("LBR virtualization supported\n");
+ }
/*
* Note, SEV setup consumes npt_enabled and enable_mmio_caching (which
* may be modified by svm_adjust_mmio_mask()), as well as nrips.
@@ -5318,14 +5359,6 @@ static __init int svm_hardware_setup(void)
svm_x86_ops.set_vnmi_pending = NULL;
}
-
- if (lbrv) {
- if (!boot_cpu_has(X86_FEATURE_LBRV))
- lbrv = false;
- else
- pr_info("LBR virtualization supported\n");
- }
-
if (!enable_pmu)
pr_info("PMU virtualization is disabled\n");
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index be57213cd295..0f1472690b59 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -30,7 +30,7 @@
#define IOPM_SIZE PAGE_SIZE * 3
#define MSRPM_SIZE PAGE_SIZE * 2
-#define MAX_DIRECT_ACCESS_MSRS 47
+#define MAX_DIRECT_ACCESS_MSRS 48
#define MSRPM_OFFSETS 32
extern u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
extern bool npt_enabled;
@@ -39,6 +39,7 @@ extern int vgif;
extern bool intercept_smi;
extern bool x2avic_enabled;
extern bool vnmi;
+extern int lbrv;
/*
* Clean bits in VMCB.
@@ -552,6 +553,7 @@ u32 *svm_vcpu_alloc_msrpm(void);
void svm_vcpu_init_msrpm(struct kvm_vcpu *vcpu, u32 *msrpm);
void svm_vcpu_free_msrpm(u32 *msrpm);
void svm_copy_lbrs(struct vmcb *to_vmcb, struct vmcb *from_vmcb);
+void svm_enable_lbrv(struct kvm_vcpu *vcpu);
void svm_update_lbrv(struct kvm_vcpu *vcpu);
int svm_set_efer(struct kvm_vcpu *vcpu, u64 efer);
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index d5b832126e34..643935a0f70a 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2242,6 +2242,9 @@ static void prepare_vmcs02_constant_state(struct vcpu_vmx *vmx)
vmcs_write64(EPT_POINTER,
construct_eptp(&vmx->vcpu, 0, PT64_ROOT_4LEVEL));
+ if (vmx->ve_info)
+ vmcs_write64(VE_INFORMATION_ADDRESS, __pa(vmx->ve_info));
+
/* All VMFUNCs are currently emulated through L0 vmexits. */
if (cpu_has_vmx_vmfunc())
vmcs_write64(VM_FUNCTION_CONTROL, 0);
@@ -6230,6 +6233,8 @@ static bool nested_vmx_l0_wants_exit(struct kvm_vcpu *vcpu,
else if (is_alignment_check(intr_info) &&
!vmx_guest_inject_ac(vcpu))
return true;
+ else if (is_ve_fault(intr_info))
+ return true;
return false;
case EXIT_REASON_EXTERNAL_INTERRUPT:
return true;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 6051fad5945f..b3c83c06f826 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5218,8 +5218,15 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu)
if (is_invalid_opcode(intr_info))
return handle_ud(vcpu);
- if (KVM_BUG_ON(is_ve_fault(intr_info), vcpu->kvm))
- return -EIO;
+ if (WARN_ON_ONCE(is_ve_fault(intr_info))) {
+ struct vmx_ve_information *ve_info = vmx->ve_info;
+
+ WARN_ONCE(ve_info->exit_reason != EXIT_REASON_EPT_VIOLATION,
+ "Unexpected #VE on VM-Exit reason 0x%x", ve_info->exit_reason);
+ dump_vmcs(vcpu);
+ kvm_mmu_print_sptes(vcpu, ve_info->guest_physical_address, "#VE");
+ return 1;
+ }
error_code = 0;
if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 082ac6d95a3a..8c9e4281d978 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -164,15 +164,6 @@ module_param(kvmclock_periodic_sync, bool, 0444);
static u32 __read_mostly tsc_tolerance_ppm = 250;
module_param(tsc_tolerance_ppm, uint, 0644);
-/*
- * lapic timer advance (tscdeadline mode only) in nanoseconds. '-1' enables
- * adaptive tuning starting from default advancement of 1000ns. '0' disables
- * advancement entirely. Any other value is used as-is and disables adaptive
- * tuning, i.e. allows privileged userspace to set an exact advancement time.
- */
-static int __read_mostly lapic_timer_advance_ns = -1;
-module_param(lapic_timer_advance_ns, int, 0644);
-
static bool __read_mostly vector_hashing = true;
module_param(vector_hashing, bool, 0444);
@@ -12169,7 +12160,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
if (r < 0)
return r;
- r = kvm_create_lapic(vcpu, lapic_timer_advance_ns);
+ r = kvm_create_lapic(vcpu);
if (r < 0)
goto fail_mmu_destroy;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 14:53:31 +0100