From: Mihai Donțu <[email protected]> This function is needed for kvmi_update_ad_flags() and kvm_page_track_emulation_failure().
kvmi_update_ad_flags() uses the existing guest page table walk code to update the A/D bits and return to guest (when the introspection tool write-protects the guest page tables). kvm_page_track_emulation_failure() calls the page tracking code, that can trigger an event for the introspection tool (which might need the GVA in addition to the GPA). Signed-off-by: Mihai Donțu <[email protected]> Co-developed-by: Nicușor Cîțu <[email protected]> Signed-off-by: Nicușor Cîțu <[email protected]> Signed-off-by: Adalbert Lazăr <[email protected]> --- arch/x86/include/asm/kvm-x86-ops.h | 1 + arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/include/asm/vmx.h | 2 ++ arch/x86/kvm/svm/svm.c | 9 +++++++++ arch/x86/kvm/vmx/vmx.c | 9 +++++++++ 5 files changed, 23 insertions(+) diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h index 4228b775a48e..ad6c19d9bef5 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -129,6 +129,7 @@ KVM_X86_OP(control_desc_intercept) KVM_X86_OP(desc_intercepted) KVM_X86_OP(msr_write_intercepted) KVM_X86_OP(control_msr_intercept) +KVM_X86_OP(fault_gla) #undef KVM_X86_OP #undef KVM_X86_OP_NULL diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index db88d38e485d..96058a8a1e5e 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1509,6 +1509,8 @@ struct kvm_x86_ops { int (*complete_emulated_msr)(struct kvm_vcpu *vcpu, int err); void (*vcpu_deliver_sipi_vector)(struct kvm_vcpu *vcpu, u8 vector); + + u64 (*fault_gla)(struct kvm_vcpu *vcpu); }; struct kvm_x86_nested_ops { diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 0ffaa3156a4e..5cef3b96e29a 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -546,6 +546,7 @@ enum vm_entry_failure_code { #define EPT_VIOLATION_READABLE_BIT 3 #define EPT_VIOLATION_WRITABLE_BIT 4 #define EPT_VIOLATION_EXECUTABLE_BIT 5 +#define EPT_VIOLATION_GLA_VALID_BIT 7 #define EPT_VIOLATION_GVA_TRANSLATED_BIT 8 #define EPT_VIOLATION_ACC_READ (1 << EPT_VIOLATION_ACC_READ_BIT) #define EPT_VIOLATION_ACC_WRITE (1 << EPT_VIOLATION_ACC_WRITE_BIT) @@ -553,6 +554,7 @@ enum vm_entry_failure_code { #define EPT_VIOLATION_READABLE (1 << EPT_VIOLATION_READABLE_BIT) #define EPT_VIOLATION_WRITABLE (1 << EPT_VIOLATION_WRITABLE_BIT) #define EPT_VIOLATION_EXECUTABLE (1 << EPT_VIOLATION_EXECUTABLE_BIT) +#define EPT_VIOLATION_GLA_VALID (1 << EPT_VIOLATION_GLA_VALID_BIT) #define EPT_VIOLATION_GVA_TRANSLATED (1 << EPT_VIOLATION_GVA_TRANSLATED_BIT) /* diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index de6cb59a332d..5409438766ee 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -4704,6 +4704,13 @@ static int svm_vm_init(struct kvm *kvm) return 0; } +static u64 svm_fault_gla(struct kvm_vcpu *vcpu) +{ + const struct vcpu_svm *svm = to_svm(vcpu); + + return svm->vcpu.arch.cr2 ? svm->vcpu.arch.cr2 : ~0ull; +} + static struct kvm_x86_ops svm_x86_ops __initdata = { .hardware_unsetup = svm_hardware_teardown, .hardware_enable = svm_hardware_enable, @@ -4839,6 +4846,8 @@ static struct kvm_x86_ops svm_x86_ops __initdata = { .complete_emulated_msr = svm_complete_emulated_msr, .vcpu_deliver_sipi_vector = svm_vcpu_deliver_sipi_vector, + + .fault_gla = svm_fault_gla, }; static struct kvm_x86_init_ops svm_init_ops __initdata = { diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index ceba2e112e26..f3e880ef22c8 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7620,6 +7620,13 @@ static bool vmx_check_apicv_inhibit_reasons(ulong bit) return supported & BIT(bit); } +static u64 vmx_fault_gla(struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.exit_qualification & EPT_VIOLATION_GLA_VALID) + return vmcs_readl(GUEST_LINEAR_ADDRESS); + return ~0ull; +} + static struct kvm_x86_ops vmx_x86_ops __initdata = { .hardware_unsetup = hardware_unsetup, @@ -7762,6 +7769,8 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = { .complete_emulated_msr = kvm_complete_insn_gp, .vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector, + + .fault_gla = vmx_fault_gla, }; static __init void vmx_setup_user_return_msrs(void) _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
