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KVM: selftests: Move Hyper-V VP assist page enablement out of evmcs.h

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Hyper-V VP assist page is not eVMCS specific, it is also used for
enlightened nSVM. Move the code to vendor neutral place.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-41-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2022-11-01 15:54:18 +01:00 committed by Paolo Bonzini
parent d7b14a868a
commit e8f3d23c02
5 changed files with 56 additions and 38 deletions
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1
tools/testing/selftests/kvm/Makefile
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@ -53,6 +53,7 @@ LIBKVM_STRING += lib/string_override.c
LIBKVM_x86_64 += lib/x86_64/apic.c
LIBKVM_x86_64 += lib/x86_64/handlers.S
LIBKVM_x86_64 += lib/x86_64/hyperv.c
LIBKVM_x86_64 += lib/x86_64/memstress.c
LIBKVM_x86_64 += lib/x86_64/processor.c
LIBKVM_x86_64 += lib/x86_64/svm.c

40
tools/testing/selftests/kvm/include/x86_64/evmcs.h
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@ -10,6 +10,7 @@
#define SELFTEST_KVM_EVMCS_H
#include <stdint.h>
#include "hyperv.h"
#include "vmx.h"
#define u16 uint16_t
@ -20,27 +21,6 @@
extern bool enable_evmcs;
struct hv_nested_enlightenments_control {
struct {
__u32 directhypercall:1;
__u32 reserved:31;
} features;
struct {
__u32 reserved;
} hypercallControls;
} __packed;
/* Define virtual processor assist page structure. */
struct hv_vp_assist_page {
__u32 apic_assist;
__u32 reserved1;
__u64 vtl_control[3];
struct hv_nested_enlightenments_control nested_control;
__u8 enlighten_vmentry;
__u8 reserved2[7];
__u64 current_nested_vmcs;
} __packed;
struct hv_enlightened_vmcs {
u32 revision_id;
u32 abort;
@ -257,29 +237,13 @@ struct hv_enlightened_vmcs {
#define HV_VMX_ENLIGHTENED_CLEAN_FIELD_ENLIGHTENMENTSCONTROL BIT(15)
#define HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL 0xFFFF
#define HV_X64_MSR_VP_ASSIST_PAGE 0x40000073
#define HV_X64_MSR_VP_ASSIST_PAGE_ENABLE 0x00000001
#define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT 12
#define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK \
(~((1ull << HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT) - 1))
extern struct hv_enlightened_vmcs *current_evmcs;
extern struct hv_vp_assist_page *current_vp_assist;
int vcpu_enable_evmcs(struct kvm_vcpu *vcpu);
static inline int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist)
static inline void evmcs_enable(void)
{
u64 val = (vp_assist_pa & HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK) |
HV_X64_MSR_VP_ASSIST_PAGE_ENABLE;
wrmsr(HV_X64_MSR_VP_ASSIST_PAGE, val);
current_vp_assist = vp_assist;
enable_evmcs = true;
return 0;
}
static inline int evmcs_vmptrld(uint64_t vmcs_pa, void *vmcs)

31
tools/testing/selftests/kvm/include/x86_64/hyperv.h
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@ -237,4 +237,35 @@ static inline void hyperv_write_xmm_input(void *data, int n_sse_regs)
/* Proper HV_X64_MSR_GUEST_OS_ID value */
#define HYPERV_LINUX_OS_ID ((u64)0x8100 << 48)
#define HV_X64_MSR_VP_ASSIST_PAGE 0x40000073
#define HV_X64_MSR_VP_ASSIST_PAGE_ENABLE 0x00000001
#define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT 12
#define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK \
(~((1ull << HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT) - 1))
struct hv_nested_enlightenments_control {
struct {
__u32 directhypercall:1;
__u32 reserved:31;
} features;
struct {
__u32 reserved;
} hypercallControls;
} __packed;
/* Define virtual processor assist page structure. */
struct hv_vp_assist_page {
__u32 apic_assist;
__u32 reserved1;
__u64 vtl_control[3];
struct hv_nested_enlightenments_control nested_control;
__u8 enlighten_vmentry;
__u8 reserved2[7];
__u64 current_nested_vmcs;
} __packed;
extern struct hv_vp_assist_page *current_vp_assist;
int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist);
#endif /* !SELFTEST_KVM_HYPERV_H */

21
tools/testing/selftests/kvm/lib/x86_64/hyperv.c Normal file
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@ -0,0 +1,21 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Hyper-V specific functions.
*
* Copyright (C) 2021, Red Hat Inc.
*/
#include <stdint.h>
#include "processor.h"
#include "hyperv.h"
int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist)
{
uint64_t val = (vp_assist_pa & HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK) |
HV_X64_MSR_VP_ASSIST_PAGE_ENABLE;
wrmsr(HV_X64_MSR_VP_ASSIST_PAGE, val);
current_vp_assist = vp_assist;
return 0;
}

1
tools/testing/selftests/kvm/x86_64/evmcs_test.c
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@ -79,6 +79,7 @@ void guest_code(struct vmx_pages *vmx_pages)
GUEST_SYNC(2);
enable_vp_assist(vmx_pages->vp_assist_gpa, vmx_pages->vp_assist);
evmcs_enable();
GUEST_ASSERT(vmx_pages->vmcs_gpa);
GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));