KVM: SVM: Fix x2APIC MSRs interception

The index for svm_direct_access_msrs was incorrectly initialized with
the APIC MMIO register macros. Fix by introducing a macro for calculating
x2APIC MSRs.

Fixes: 5c127c85472c ("KVM: SVM: Adding support for configuring x2APIC MSRs interception")
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20220718083833.222117-1-suravee.suthikulpanit@amd.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index ba81a7e..aef63aa 100644 (file)
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -74,6 +74,8 @@ static uint64_t osvw_len = 4, osvw_status;
 
 static DEFINE_PER_CPU(u64, current_tsc_ratio);
 
+#define X2APIC_MSR(x)  (APIC_BASE_MSR + (x >> 4))
+
 static const struct svm_direct_access_msrs {
        u32 index;   /* Index of the MSR */
        bool always; /* True if intercept is initially cleared */
@@ -100,31 +102,31 @@ static const struct svm_direct_access_msrs {
        { .index = MSR_IA32_CR_PAT,                     .always = false },
        { .index = MSR_AMD64_SEV_ES_GHCB,               .always = true  },
        { .index = MSR_TSC_AUX,                         .always = false },
-       { .index = (APIC_BASE_MSR + APIC_ID),           .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_TASKPRI),      .always = false },
-       { .index = (APIC_BASE_MSR + APIC_ARBPRI),       .always = false },
-       { .index = (APIC_BASE_MSR + APIC_PROCPRI),      .always = false },
-       { .index = (APIC_BASE_MSR + APIC_EOI),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_RRR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LDR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_DFR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_SPIV),         .always = false },
-       { .index = (APIC_BASE_MSR + APIC_ISR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_TMR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_IRR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_ESR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_ICR),          .always = false },
-       { .index = (APIC_BASE_MSR + APIC_ICR2),         .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVTT),         .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVTTHMR),      .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVTPC),        .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVT0),         .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVT1),         .always = false },
-       { .index = (APIC_BASE_MSR + APIC_LVTERR),       .always = false },
-       { .index = (APIC_BASE_MSR + APIC_TMICT),        .always = false },
-       { .index = (APIC_BASE_MSR + APIC_TMCCT),        .always = false },
-       { .index = (APIC_BASE_MSR + APIC_TDCR),         .always = false },
+       { .index = X2APIC_MSR(APIC_ID),                 .always = false },
+       { .index = X2APIC_MSR(APIC_LVR),                .always = false },
+       { .index = X2APIC_MSR(APIC_TASKPRI),            .always = false },
+       { .index = X2APIC_MSR(APIC_ARBPRI),             .always = false },
+       { .index = X2APIC_MSR(APIC_PROCPRI),            .always = false },
+       { .index = X2APIC_MSR(APIC_EOI),                .always = false },
+       { .index = X2APIC_MSR(APIC_RRR),                .always = false },
+       { .index = X2APIC_MSR(APIC_LDR),                .always = false },
+       { .index = X2APIC_MSR(APIC_DFR),                .always = false },
+       { .index = X2APIC_MSR(APIC_SPIV),               .always = false },
+       { .index = X2APIC_MSR(APIC_ISR),                .always = false },
+       { .index = X2APIC_MSR(APIC_TMR),                .always = false },
+       { .index = X2APIC_MSR(APIC_IRR),                .always = false },
+       { .index = X2APIC_MSR(APIC_ESR),                .always = false },
+       { .index = X2APIC_MSR(APIC_ICR),                .always = false },
+       { .index = X2APIC_MSR(APIC_ICR2),               .always = false },
+       { .index = X2APIC_MSR(APIC_LVTT),               .always = false },
+       { .index = X2APIC_MSR(APIC_LVTTHMR),            .always = false },
+       { .index = X2APIC_MSR(APIC_LVTPC),              .always = false },
+       { .index = X2APIC_MSR(APIC_LVT0),               .always = false },
+       { .index = X2APIC_MSR(APIC_LVT1),               .always = false },
+       { .index = X2APIC_MSR(APIC_LVTERR),             .always = false },
+       { .index = X2APIC_MSR(APIC_TMICT),              .always = false },
+       { .index = X2APIC_MSR(APIC_TMCCT),              .always = false },
+       { .index = X2APIC_MSR(APIC_TDCR),               .always = false },
        { .index = MSR_INVALID,                         .always = false },
 };