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    Subject[PATCH 07/12] KVM: SVM: Add clean-bit for control registers
    Date
    This patch implements the CRx clean-bit for the vmcb. This
    bit covers cr0, cr3, cr4, and efer.

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    arch/x86/kvm/svm.c | 7 +++++++
    1 files changed, 7 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
    index 3b5d894..1b35969 100644
    --- a/arch/x86/kvm/svm.c
    +++ b/arch/x86/kvm/svm.c
    @@ -192,6 +192,7 @@ enum {
    VMCB_ASID, /* ASID */
    VMCB_INTR, /* int_ctl, int_vector */
    VMCB_NPT, /* npt_en, nCR3, gPAT */
    + VMCB_CR, /* CR0, CR3, CR4, EFER */
    VMCB_DIRTY_MAX,
    };

    @@ -441,6 +442,7 @@ static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
    efer &= ~EFER_LME;

    to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
    + mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
    }

    static int is_external_interrupt(u32 info)
    @@ -1338,6 +1340,7 @@ static void update_cr0_intercept(struct vcpu_svm *svm)
    *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
    | (gcr0 & SVM_CR0_SELECTIVE_MASK);

    + mark_dirty(svm->vmcb, VMCB_CR);

    if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
    clr_cr_intercept(svm, INTERCEPT_CR0_READ);
    @@ -1404,6 +1407,7 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
    */
    cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
    svm->vmcb->save.cr0 = cr0;
    + mark_dirty(svm->vmcb, VMCB_CR);
    update_cr0_intercept(svm);
    }

    @@ -1420,6 +1424,7 @@ static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
    cr4 |= X86_CR4_PAE;
    cr4 |= host_cr4_mce;
    to_svm(vcpu)->vmcb->save.cr4 = cr4;
    + mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
    }

    static void svm_set_segment(struct kvm_vcpu *vcpu,
    @@ -3546,6 +3551,7 @@ static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
    struct vcpu_svm *svm = to_svm(vcpu);

    svm->vmcb->save.cr3 = root;
    + mark_dirty(svm->vmcb, VMCB_CR);
    force_new_asid(vcpu);
    }

    @@ -3558,6 +3564,7 @@ static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)

    /* Also sync guest cr3 here in case we live migrate */
    svm->vmcb->save.cr3 = vcpu->arch.cr3;
    + mark_dirty(svm->vmcb, VMCB_CR);

    force_new_asid(vcpu);
    }
    --
    1.7.1



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