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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KVM_X86_VMX_EVMCS_H
#define __KVM_X86_VMX_EVMCS_H
#include <linux/jump_label.h>
#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
#include <asm/vmx.h>
#include "capabilities.h"
#include "vmcs.h"
#include "vmcs12.h"
struct vmcs_config;
DECLARE_STATIC_KEY_FALSE(enable_evmcs);
#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
#define KVM_EVMCS_VERSION 1
/*
* 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,
* GUEST_PML_INDEX = 0x00000812,
* PML_ADDRESS = 0x0000200e,
* VM_FUNCTION_CONTROL = 0x00002018,
* EPTP_LIST_ADDRESS = 0x00002024,
* VMREAD_BITMAP = 0x00002026,
* VMWRITE_BITMAP = 0x00002028,
*
* TSC_MULTIPLIER = 0x00002032,
* PLE_GAP = 0x00004020,
* PLE_WINDOW = 0x00004022,
* VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
*
* Currently unsupported in KVM:
* GUEST_IA32_RTIT_CTL = 0x00002814,
*/
#define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \
PIN_BASED_VMX_PREEMPTION_TIMER)
#define EVMCS1_UNSUPPORTED_EXEC_CTRL (CPU_BASED_ACTIVATE_TERTIARY_CONTROLS)
#define EVMCS1_UNSUPPORTED_2NDEXEC \
(SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | \
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | \
SECONDARY_EXEC_APIC_REGISTER_VIRT | \
SECONDARY_EXEC_ENABLE_PML | \
SECONDARY_EXEC_ENABLE_VMFUNC | \
SECONDARY_EXEC_SHADOW_VMCS | \
SECONDARY_EXEC_TSC_SCALING | \
SECONDARY_EXEC_PAUSE_LOOP_EXITING)
#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL \
(VM_EXIT_SAVE_VMX_PREEMPTION_TIMER)
#define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (0)
#define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING)
struct evmcs_field {
u16 offset;
u16 clean_field;
};
extern const struct evmcs_field vmcs_field_to_evmcs_1[];
extern const unsigned int nr_evmcs_1_fields;
static __always_inline int evmcs_field_offset(unsigned long field,
u16 *clean_field)
{
unsigned int index = ROL16(field, 6);
const struct evmcs_field *evmcs_field;
if (unlikely(index >= nr_evmcs_1_fields))
return -ENOENT;
evmcs_field = &vmcs_field_to_evmcs_1[index];
/*
* Use offset=0 to detect holes in eVMCS. This offset belongs to
* 'revision_id' but this field has no encoding and is supposed to
* be accessed directly.
*/
if (unlikely(!evmcs_field->offset))
return -ENOENT;
if (clean_field)
*clean_field = evmcs_field->clean_field;
return evmcs_field->offset;
}
static inline u64 evmcs_read_any(struct hv_enlightened_vmcs *evmcs,
unsigned long field, u16 offset)
{
/*
* vmcs12_read_any() doesn't care whether the supplied structure
* is 'struct vmcs12' or 'struct hv_enlightened_vmcs' as it takes
* the exact offset of the required field, use it for convenience
* here.
*/
return vmcs12_read_any((void *)evmcs, field, offset);
}
#if IS_ENABLED(CONFIG_HYPERV)
static __always_inline int get_evmcs_offset(unsigned long field,
u16 *clean_field)
{
int offset = evmcs_field_offset(field, clean_field);
WARN_ONCE(offset < 0, "KVM: accessing unsupported EVMCS field %lx\n",
field);
return offset;
}
static __always_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 inline void evmcs_touch_msr_bitmap(void)
{
if (unlikely(!current_evmcs))
return;
if (current_evmcs->hv_enlightenments_control.msr_bitmap)
current_evmcs->hv_clean_fields &=
~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
}
static inline void evmcs_load(u64 phys_addr)
{
struct hv_vp_assist_page *vp_ap =
hv_get_vp_assist_page(smp_processor_id());
if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall)
vp_ap->nested_control.features.directhypercall = 1;
vp_ap->current_nested_vmcs = phys_addr;
vp_ap->enlighten_vmentry = 1;
}
#else /* !IS_ENABLED(CONFIG_HYPERV) */
static __always_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_touch_msr_bitmap(void) {}
#endif /* IS_ENABLED(CONFIG_HYPERV) */
#define EVMPTR_INVALID (-1ULL)
#define EVMPTR_MAP_PENDING (-2ULL)
static inline bool evmptr_is_valid(u64 evmptr)
{
return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
}
enum nested_evmptrld_status {
EVMPTRLD_DISABLED,
EVMPTRLD_SUCCEEDED,
EVMPTRLD_VMFAIL,
EVMPTRLD_ERROR,
};
bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa);
uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
int nested_enable_evmcs(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version);
void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
#endif /* __KVM_X86_VMX_EVMCS_H */
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