search for: guest_test_xsetbv

.../kvmi_test.c @@ -21,6 +21,8 @@ #define VCPU_ID 5 +#define X86_FEATURE_XSAVE (1<<26) + static int socket_pair[2]; #define Kvm_socket socket_pair[0] #define Userspace_socket socket_pair[1] @@ -53,6 +55,7 @@ enum { GUEST_TEST_BP, GUEST_TEST_CR, GUEST_TEST_HYPERCALL, + GUEST_TEST_XSETBV, }; #define GUEST_REQUEST_TEST() GUEST_SYNC(0) @@ -84,6 +87,45 @@ static void guest_hypercall_test(void) asm volatile(".byte 0x0f,0x01,0xc1"); } +/* from fpu/internal.h */ +static u64 xgetbv(u32 index) +{ + u32 eax, edx; + + asm volatile(".byte 0x0f,0x01,0xd0" /* xg...

.../kvmi_test.c @@ -22,6 +22,8 @@ #define VCPU_ID 5 +#define X86_FEATURE_XSAVE (1<<26) + static int socket_pair[2]; #define Kvm_socket socket_pair[0] #define Userspace_socket socket_pair[1] @@ -54,6 +56,7 @@ enum { GUEST_TEST_BP, GUEST_TEST_CR, GUEST_TEST_HYPERCALL, + GUEST_TEST_XSETBV, }; #define GUEST_REQUEST_TEST() GUEST_SYNC(0) @@ -89,6 +92,45 @@ static void guest_hypercall_test(void) asm volatile(".byte 0x0f,0x01,0xc1"); } +/* from fpu/internal.h */ +static u64 xgetbv(u32 index) +{ + u32 eax, edx; + + asm volatile(".byte 0x0f,0x01,0xd0" /* xg...

...s/testing/selftests/kvm/x86_64/kvmi_test.c index 4308cb995ce3..7bf2b64b62a3 100644 --- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c +++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c @@ -56,6 +56,7 @@ enum { GUEST_TEST_CR, GUEST_TEST_DESCRIPTOR, GUEST_TEST_HYPERCALL, + GUEST_TEST_MSR, GUEST_TEST_XSETBV, }; @@ -96,6 +97,15 @@ static void guest_hypercall_test(void) asm volatile(".byte 0x0f,0x01,0xc1"); } +static void guest_msr_test(void) +{ + uint64_t msr; + + msr = rdmsr(MSR_MISC_FEATURES_ENABLES); + msr |= 1; /* MSR_MISC_FEATURES_ENABLES_CPUID_FAULT */ + wrmsr(MSR_MISC_FEATURES_...

...s/testing/selftests/kvm/x86_64/kvmi_test.c index 0087b91574f0..0ddc0029e3e5 100644 --- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c +++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c @@ -57,6 +57,7 @@ enum { GUEST_TEST_CR, GUEST_TEST_DESCRIPTOR, GUEST_TEST_HYPERCALL, + GUEST_TEST_MSR, GUEST_TEST_XSETBV, }; @@ -101,6 +102,15 @@ static void guest_hypercall_test(void) asm volatile(".byte 0x0f,0x01,0xc1"); } +static void guest_msr_test(void) +{ + uint64_t msr; + + msr = rdmsr(MSR_MISC_FEATURES_ENABLES); + msr |= 1; /* MSR_MISC_FEATURES_ENABLES_CPUID_FAULT */ + wrmsr(MSR_MISC_FEATURE...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

This patch series is based on the VM introspection patches (https://lore.kernel.org/kvm/20200721210922.7646-1-alazar at bitdefender.com/), extending the introspection API with EPT Views and Virtualization Exceptions (#VE) support. The purpose of this series is to get an initial feedback and to see if we are on the right track, especially because the changes made to add the EPT views are not small