diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 4bc018333d76a118175ab35f9b6d5fd304e83119..4459c477af9f873918178a80a0c5dbeb808edef8 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1461,19 +1461,13 @@ static bool nested_svm_exit_handled_msr(struct vcpu_svm *svm) { u32 param = svm->vmcb->control.exit_info_1 & 1; u32 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX]; - struct page *page; bool ret = false; u32 t0, t1; - u8 *msrpm; + u8 val; if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) return false; - msrpm = nested_svm_map(svm, svm->nested.vmcb_msrpm, &page); - - if (!msrpm) - goto out; - switch (msr) { case 0 ... 0x1fff: t0 = (msr * 2) % 8; @@ -1494,11 +1488,10 @@ static bool nested_svm_exit_handled_msr(struct vcpu_svm *svm) goto out; } - ret = msrpm[t1] & ((1 << param) << t0); + if (!kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + t1, &val, 1)) + ret = val & ((1 << param) << t0); out: - nested_svm_unmap(page); - return ret; }