Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
On Wed, Dec 20, 2017 at 4:05 AM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> Remove duplicate expression in nested_vmx_prepare_msr_bitmap, and make
> the register names clearer in hardware_setup.
>
> Suggested-by: Jim Mattson <jmattson@xxxxxxxxxx>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> ---
> arch/x86/kvm/vmx.c | 19 +++++++++----------
> 1 file changed, 9 insertions(+), 10 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 905aaa778306..65e09096a5ab 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -5256,6 +5256,8 @@ static void pt_disable_intercept_for_msr(bool flag)
> }
> }
>
> +#define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4))
> +
> static void vmx_disable_intercept_msr_x2apic(u32 msr, int type, bool apicv_active)
> {
> if (apicv_active) {
> @@ -7136,7 +7138,7 @@ static __init int hardware_setup(void)
> set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
>
> for (msr = 0x800; msr <= 0x8ff; msr++) {
> - if (msr == 0x839 /* TMCCT */)
> + if (msr == X2APIC_MSR(APIC_TMCCT))
> continue;
> vmx_disable_intercept_msr_x2apic(msr, MSR_TYPE_R, true);
> }
> @@ -7145,12 +7147,9 @@ static __init int hardware_setup(void)
> * TPR reads and writes can be virtualized even if virtual interrupt
> * delivery is not in use.
> */
> - vmx_disable_intercept_msr_x2apic(0x808, MSR_TYPE_R | MSR_TYPE_W, false);
> -
> - /* EOI */
> - vmx_disable_intercept_msr_x2apic(0x80b, MSR_TYPE_W, true);
> - /* SELF-IPI */
> - vmx_disable_intercept_msr_x2apic(0x83f, MSR_TYPE_W, true);
> + vmx_disable_intercept_msr_x2apic(X2APIC_MSR(APIC_TASKPRI), MSR_TYPE_R | MSR_TYPE_W, false);
> + vmx_disable_intercept_msr_x2apic(X2APIC_MSR(APIC_EOI), MSR_TYPE_W, true);
> + vmx_disable_intercept_msr_x2apic(X2APIC_MSR(APIC_SELF_IPI), MSR_TYPE_W, true);
>
> if (enable_ept)
> vmx_enable_tdp();
> @@ -10344,17 +10343,17 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
>
> nested_vmx_disable_intercept_for_msr(
> msr_bitmap_l1, msr_bitmap_l0,
> - APIC_BASE_MSR + (APIC_TASKPRI >> 4),
> + X2APIC_MSR(APIC_TASKPRI),
> MSR_TYPE_W);
>
> if (nested_cpu_has_vid(vmcs12)) {
> nested_vmx_disable_intercept_for_msr(
> msr_bitmap_l1, msr_bitmap_l0,
> - APIC_BASE_MSR + (APIC_EOI >> 4),
> + X2APIC_MSR(APIC_EOI),
> MSR_TYPE_W);
> nested_vmx_disable_intercept_for_msr(
> msr_bitmap_l1, msr_bitmap_l0,
> - APIC_BASE_MSR + (APIC_SELF_IPI >> 4),
> + X2APIC_MSR(APIC_SELF_IPI),
> MSR_TYPE_W);
> }
> kunmap(page);
> --
> 1.8.3.1
>
