lkml.org 
[lkml]   [2020]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 10/28] KVM: nSVM: extract preparation of VMCB for nested run
Date
Split out filling svm->vmcb.save and svm->vmcb.control before VMRUN.
Only the latter will be useful when restoring nested SVM state.

This patch introduces no semantic change, so the MMU setup is still
done in nested_prepare_vmcb_save. The next patch will clean up things.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/svm/nested.c | 40 +++++++++++++++++++++++----------------
1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index ea00dcd8c39b..af7c9ce8c5ad 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -245,21 +245,8 @@ static void load_nested_vmcb_control(struct vcpu_svm *svm,
svm->vcpu.arch.tsc_offset += control->tsc_offset;
}

-void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
- struct vmcb *nested_vmcb)
+static void nested_prepare_vmcb_save(struct vcpu_svm *svm, struct vmcb *nested_vmcb)
{
- bool evaluate_pending_interrupts =
- is_intercept(svm, INTERCEPT_VINTR) ||
- is_intercept(svm, INTERCEPT_IRET);
-
- svm->nested.vmcb = vmcb_gpa;
- if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
- svm->vcpu.arch.hflags |= HF_HIF_MASK;
- else
- svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
-
- load_nested_vmcb_control(svm, &nested_vmcb->control);
-
if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE)
nested_svm_init_mmu_context(&svm->vcpu);

@@ -291,7 +278,10 @@ void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
svm->vcpu.arch.dr6 = nested_vmcb->save.dr6;
svm->vmcb->save.cpl = nested_vmcb->save.cpl;
+}

+static void nested_prepare_vmcb_control(struct vcpu_svm *svm, struct vmcb *nested_vmcb)
+{
svm_flush_tlb(&svm->vcpu);
if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
svm->vcpu.arch.hflags |= HF_VINTR_MASK;
@@ -321,6 +311,26 @@ void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
*/
recalc_intercepts(svm);

+ mark_all_dirty(svm->vmcb);
+}
+
+void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
+ struct vmcb *nested_vmcb)
+{
+ bool evaluate_pending_interrupts =
+ is_intercept(svm, INTERCEPT_VINTR) ||
+ is_intercept(svm, INTERCEPT_IRET);
+
+ svm->nested.vmcb = vmcb_gpa;
+ if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
+ svm->vcpu.arch.hflags |= HF_HIF_MASK;
+ else
+ svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
+
+ load_nested_vmcb_control(svm, &nested_vmcb->control);
+ nested_prepare_vmcb_save(svm, nested_vmcb);
+ nested_prepare_vmcb_control(svm, nested_vmcb);
+
/*
* If L1 had a pending IRQ/NMI before executing VMRUN,
* which wasn't delivered because it was disallowed (e.g.
@@ -336,8 +346,6 @@ void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
enable_gif(svm);
if (unlikely(evaluate_pending_interrupts))
kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
-
- mark_all_dirty(svm->vmcb);
}

int nested_svm_vmrun(struct vcpu_svm *svm)
--
2.26.2

\
 
 \ /
  Last update: 2020-05-26 19:25    [W:0.138 / U:16.844 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site