From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: Jim Mattson <jmattson@google.com>,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
Ingo Molnar <mingo@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Maxim Levitsky <mlevitsk@redhat.com>,
linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT
AND 64-BIT)), Joerg Roedel <joro@8bytes.org>,
Wanpeng Li <wanpengli@tencent.com>,
"H. Peter Anvin" <hpa@zytor.com>, Borislav Petkov <bp@alien8.de>
Subject: [PATCH v2 3/6] KVM: nSVM: call KVM_REQ_GET_NESTED_STATE_PAGES on exit from SMM mode
Date: Mon, 30 Aug 2021 15:55:36 +0300 [thread overview]
Message-ID: <20210830125539.1768833-4-mlevitsk@redhat.com> (raw)
In-Reply-To: <20210830125539.1768833-1-mlevitsk@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
arch/x86/kvm/svm/nested.c | 10 +++++++---
arch/x86/kvm/svm/svm.c | 8 +++++++-
arch/x86/kvm/svm/svm.h | 3 ++-
3 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 5e13357da21e..e9c326ea9847 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -572,7 +572,7 @@ static void nested_svm_copy_common_state(struct vmcb *from_vmcb, struct vmcb *to
}
int enter_svm_guest_mode(struct kvm_vcpu *vcpu, u64 vmcb12_gpa,
- struct vmcb *vmcb12)
+ struct vmcb *vmcb12, bool from_entry)
{
struct vcpu_svm *svm = to_svm(vcpu);
int ret;
@@ -602,13 +602,17 @@ int enter_svm_guest_mode(struct kvm_vcpu *vcpu, u64 vmcb12_gpa,
nested_vmcb02_prepare_save(svm, vmcb12);
ret = nested_svm_load_cr3(&svm->vcpu, vmcb12->save.cr3,
- nested_npt_enabled(svm), true);
+ nested_npt_enabled(svm), from_entry);
if (ret)
return ret;
if (!npt_enabled)
vcpu->arch.mmu->inject_page_fault = svm_inject_page_fault_nested;
+ if (!from_entry) {
+ kvm_make_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu);
+ }
+
svm_set_gif(svm, true);
return 0;
@@ -674,7 +678,7 @@ int nested_svm_vmrun(struct kvm_vcpu *vcpu)
svm->nested.nested_run_pending = 1;
- if (enter_svm_guest_mode(vcpu, vmcb12_gpa, vmcb12))
+ if (enter_svm_guest_mode(vcpu, vmcb12_gpa, vmcb12, true))
goto out_exit_err;
if (nested_svm_vmrun_msrpm(svm))
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 4aa269a587d0..05b25a627c03 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4354,6 +4354,12 @@ static int svm_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
if (svm_allocate_nested(svm))
return 1;
+ /* Exit from the SMM to the non root mode also uses
+ * the KVM_REQ_GET_NESTED_STATE_PAGES request,
+ * but in this case the pdptrs must be always reloaded
+ */
+ vcpu->arch.pdptrs_from_userspace = false;
+
/*
* Restore L1 host state from L1 HSAVE area as VMCB01 was
* used during SMM (see svm_enter_smm())
@@ -4368,7 +4374,7 @@ static int svm_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
vmcb12 = map.hva;
nested_load_control_from_vmcb12(svm, &vmcb12->control);
- ret = enter_svm_guest_mode(vcpu, vmcb12_gpa, vmcb12);
+ ret = enter_svm_guest_mode(vcpu, vmcb12_gpa, vmcb12, false);
kvm_vcpu_unmap(vcpu, &map, true);
kvm_vcpu_unmap(vcpu, &map_save, true);
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 524d943f3efc..51ffa46ab257 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -459,7 +459,8 @@ static inline bool nested_exit_on_nmi(struct vcpu_svm *svm)
return vmcb_is_intercept(&svm->nested.ctl, INTERCEPT_NMI);
}
-int enter_svm_guest_mode(struct kvm_vcpu *vcpu, u64 vmcb_gpa, struct vmcb *vmcb12);
+int enter_svm_guest_mode(struct kvm_vcpu *vcpu,
+ u64 vmcb_gpa, struct vmcb *vmcb12, bool from_entry);
void svm_leave_nested(struct vcpu_svm *svm);
void svm_free_nested(struct vcpu_svm *svm);
int svm_allocate_nested(struct vcpu_svm *svm);
--
2.26.3
next prev parent reply other threads:[~2021-08-30 12:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-30 12:55 [PATCH v2 0/6] KVM: few more SMM fixes Maxim Levitsky
2021-08-30 12:55 ` [PATCH v2 1/6] KVM: SVM: restore the L1 host state prior to resuming nested guest on SMM exit Maxim Levitsky
2021-08-30 12:55 ` [PATCH v2 2/6] KVM: x86: force PDPTR reload " Maxim Levitsky
2021-08-30 12:55 ` Maxim Levitsky [this message]
2021-08-30 12:55 ` [PATCH v2 4/6] KVM: VMX: synthesize invalid VM exit when emulating invalid guest state Maxim Levitsky
2021-08-30 12:55 ` [PATCH v2 5/6] KVM: nVMX: don't fail nested VM entry on invalid guest state if !from_vmentry Maxim Levitsky
2021-10-08 23:37 ` Sean Christopherson
2021-08-30 12:55 ` [PATCH v2 6/6] KVM: nVMX: re-evaluate emulation_required on nested VM exit Maxim Levitsky
2021-09-21 22:55 ` Sean Christopherson
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