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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:17:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:17:46 +0000 |
commit | 7f3a4257159dea8e7ef66d1a539dc6df708b8ed3 (patch) | |
tree | bcc69b5f4609f348fac49e2f59e210b29eaea783 /tools/testing/selftests/kvm/x86_64/sev_smoke_test.c | |
parent | Adding upstream version 6.9.12. (diff) | |
download | linux-7f3a4257159dea8e7ef66d1a539dc6df708b8ed3.tar.xz linux-7f3a4257159dea8e7ef66d1a539dc6df708b8ed3.zip |
Adding upstream version 6.10.3.upstream/6.10.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/sev_smoke_test.c')
-rw-r--r-- | tools/testing/selftests/kvm/x86_64/sev_smoke_test.c | 96 |
1 files changed, 95 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c index 026779f3ed..7c70c0da4f 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c @@ -4,6 +4,7 @@ #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> +#include <math.h> #include "test_util.h" #include "kvm_util.h" @@ -13,6 +14,8 @@ #include "sev.h" +#define XFEATURE_MASK_X87_AVX (XFEATURE_MASK_FP | XFEATURE_MASK_SSE | XFEATURE_MASK_YMM) + static void guest_sev_es_code(void) { /* TODO: Check CPUID after GHCB-based hypercall support is added. */ @@ -35,13 +38,98 @@ static void guest_sev_code(void) GUEST_DONE(); } +/* Stash state passed via VMSA before any compiled code runs. */ +extern void guest_code_xsave(void); +asm("guest_code_xsave:\n" + "mov $-1, %eax\n" + "mov $-1, %edx\n" + "xsave (%rdi)\n" + "jmp guest_sev_es_code"); + +static void compare_xsave(u8 *from_host, u8 *from_guest) +{ + int i; + bool bad = false; + for (i = 0; i < 4095; i++) { + if (from_host[i] != from_guest[i]) { + printf("mismatch at %02hhx | %02hhx %02hhx\n", i, from_host[i], from_guest[i]); + bad = true; + } + } + + if (bad) + abort(); +} + +static void test_sync_vmsa(uint32_t policy) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + vm_vaddr_t gva; + void *hva; + + double x87val = M_PI; + struct kvm_xsave __attribute__((aligned(64))) xsave = { 0 }; + struct kvm_sregs sregs; + struct kvm_xcrs xcrs = { + .nr_xcrs = 1, + .xcrs[0].xcr = 0, + .xcrs[0].value = XFEATURE_MASK_X87_AVX, + }; + + vm = vm_sev_create_with_one_vcpu(KVM_X86_SEV_ES_VM, guest_code_xsave, &vcpu); + gva = vm_vaddr_alloc_shared(vm, PAGE_SIZE, KVM_UTIL_MIN_VADDR, + MEM_REGION_TEST_DATA); + hva = addr_gva2hva(vm, gva); + + vcpu_args_set(vcpu, 1, gva); + + vcpu_sregs_get(vcpu, &sregs); + sregs.cr4 |= X86_CR4_OSFXSR | X86_CR4_OSXSAVE; + vcpu_sregs_set(vcpu, &sregs); + + vcpu_xcrs_set(vcpu, &xcrs); + asm("fninit\n" + "vpcmpeqb %%ymm4, %%ymm4, %%ymm4\n" + "fldl %3\n" + "xsave (%2)\n" + "fstp %%st\n" + : "=m"(xsave) + : "A"(XFEATURE_MASK_X87_AVX), "r"(&xsave), "m" (x87val) + : "ymm4", "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)"); + vcpu_xsave_set(vcpu, &xsave); + + vm_sev_launch(vm, SEV_POLICY_ES | policy, NULL); + + /* This page is shared, so make it decrypted. */ + memset(hva, 0, 4096); + + vcpu_run(vcpu); + + TEST_ASSERT(vcpu->run->exit_reason == KVM_EXIT_SYSTEM_EVENT, + "Wanted SYSTEM_EVENT, got %s", + exit_reason_str(vcpu->run->exit_reason)); + TEST_ASSERT_EQ(vcpu->run->system_event.type, KVM_SYSTEM_EVENT_SEV_TERM); + TEST_ASSERT_EQ(vcpu->run->system_event.ndata, 1); + TEST_ASSERT_EQ(vcpu->run->system_event.data[0], GHCB_MSR_TERM_REQ); + + compare_xsave((u8 *)&xsave, (u8 *)hva); + + kvm_vm_free(vm); +} + static void test_sev(void *guest_code, uint64_t policy) { struct kvm_vcpu *vcpu; struct kvm_vm *vm; struct ucall uc; - vm = vm_sev_create_with_one_vcpu(policy, guest_code, &vcpu); + uint32_t type = policy & SEV_POLICY_ES ? KVM_X86_SEV_ES_VM : KVM_X86_SEV_VM; + + vm = vm_sev_create_with_one_vcpu(type, guest_code, &vcpu); + + /* TODO: Validate the measurement is as expected. */ + vm_sev_launch(vm, policy, NULL); for (;;) { vcpu_run(vcpu); @@ -82,6 +170,12 @@ int main(int argc, char *argv[]) if (kvm_cpu_has(X86_FEATURE_SEV_ES)) { test_sev(guest_sev_es_code, SEV_POLICY_ES | SEV_POLICY_NO_DBG); test_sev(guest_sev_es_code, SEV_POLICY_ES); + + if (kvm_has_cap(KVM_CAP_XCRS) && + (xgetbv(0) & XFEATURE_MASK_X87_AVX) == XFEATURE_MASK_X87_AVX) { + test_sync_vmsa(0); + test_sync_vmsa(SEV_POLICY_NO_DBG); + } } return 0; |