提交 fee9e574 编写于 作者: P Paolo Bonzini 提交者: Zheng Zengkai

KVM: x86: allow KVM_REQ_GET_NESTED_STATE_PAGES outside guest mode for VMX

stable inclusion
from stable-5.10.13
commit cffcb5e0fe2c994f0aa5d01b3c16e3f8a59350aa
bugzilla: 47995

--------------------------------

commit 9a78e158 upstream.

VMX also uses KVM_REQ_GET_NESTED_STATE_PAGES for the Hyper-V eVMCS,
which may need to be loaded outside guest mode.  Therefore we cannot
WARN in that case.

However, that part of nested_get_vmcs12_pages is _not_ needed at
vmentry time.  Split it out of KVM_REQ_GET_NESTED_STATE_PAGES handling,
so that both vmentry and migration (and in the latter case, independent
of is_guest_mode) do the parts that are needed.

Cc: <stable@vger.kernel.org> # 5.10.x: f2c7ef3b: KVM: nSVM: cancel KVM_REQ_GET_NESTED_STATE_PAGES
Cc: <stable@vger.kernel.org> # 5.10.x
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
上级 994b8689
......@@ -200,6 +200,9 @@ static bool svm_get_nested_state_pages(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
if (WARN_ON(!is_guest_mode(vcpu)))
return true;
if (!nested_svm_vmrun_msrpm(svm)) {
vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
vcpu->run->internal.suberror =
......
......@@ -3123,13 +3123,9 @@ static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
return 0;
}
static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
{
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
struct vcpu_vmx *vmx = to_vmx(vcpu);
struct kvm_host_map *map;
struct page *page;
u64 hpa;
/*
* hv_evmcs may end up being not mapped after migration (when
......@@ -3152,6 +3148,17 @@ static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
}
}
return true;
}
static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
{
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
struct vcpu_vmx *vmx = to_vmx(vcpu);
struct kvm_host_map *map;
struct page *page;
u64 hpa;
if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
/*
* Translate L1 physical address to host physical
......@@ -3220,6 +3227,18 @@ static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
exec_controls_setbit(vmx, CPU_BASED_USE_MSR_BITMAPS);
else
exec_controls_clearbit(vmx, CPU_BASED_USE_MSR_BITMAPS);
return true;
}
static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
{
if (!nested_get_evmcs_page(vcpu))
return false;
if (is_guest_mode(vcpu) && !nested_get_vmcs12_pages(vcpu))
return false;
return true;
}
......@@ -6575,7 +6594,7 @@ struct kvm_x86_nested_ops vmx_nested_ops = {
.hv_timer_pending = nested_vmx_preemption_timer_pending,
.get_state = vmx_get_nested_state,
.set_state = vmx_set_nested_state,
.get_nested_state_pages = nested_get_vmcs12_pages,
.get_nested_state_pages = vmx_get_nested_state_pages,
.write_log_dirty = nested_vmx_write_pml_buffer,
.enable_evmcs = nested_enable_evmcs,
.get_evmcs_version = nested_get_evmcs_version,
......
......@@ -8816,9 +8816,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
if (kvm_request_pending(vcpu)) {
if (kvm_check_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu)) {
if (WARN_ON_ONCE(!is_guest_mode(vcpu)))
;
else if (unlikely(!kvm_x86_ops.nested_ops->get_nested_state_pages(vcpu))) {
if (unlikely(!kvm_x86_ops.nested_ops->get_nested_state_pages(vcpu))) {
r = 0;
goto out;
}
......
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