Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Vitaly Kuznetsov | 1201 | 92.67% | 17 | 50.00% |
Sean Christopherson | 68 | 5.25% | 5 | 14.71% |
Paolo Bonzini | 16 | 1.23% | 4 | 11.76% |
Vipin Sharma | 3 | 0.23% | 1 | 2.94% |
Ricardo Koller | 2 | 0.15% | 1 | 2.94% |
Andrew Jones | 2 | 0.15% | 2 | 5.88% |
Jim Mattson | 1 | 0.08% | 1 | 2.94% |
Wainer dos Santos Moschetta | 1 | 0.08% | 1 | 2.94% |
Wei Wang | 1 | 0.08% | 1 | 2.94% |
Colton Lewis | 1 | 0.08% | 1 | 2.94% |
Total | 1296 | 34 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018, Red Hat, Inc. * * Tests for Enlightened VMCS, including nested guest state. */ #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> #include <linux/bitmap.h> #include "test_util.h" #include "kvm_util.h" #include "hyperv.h" #include "vmx.h" static int ud_count; static void guest_ud_handler(struct ex_regs *regs) { ud_count++; regs->rip += 3; /* VMLAUNCH */ } static void guest_nmi_handler(struct ex_regs *regs) { } static inline void rdmsr_from_l2(uint32_t msr) { /* Currently, L1 doesn't preserve GPRs during vmexits. */ __asm__ __volatile__ ("rdmsr" : : "c"(msr) : "rax", "rbx", "rdx", "rsi", "rdi", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"); } /* Exit to L1 from L2 with RDMSR instruction */ void l2_guest_code(void) { u64 unused; GUEST_SYNC(7); GUEST_SYNC(8); /* Forced exit to L1 upon restore */ GUEST_SYNC(9); vmcall(); /* MSR-Bitmap tests */ rdmsr_from_l2(MSR_FS_BASE); /* intercepted */ rdmsr_from_l2(MSR_FS_BASE); /* intercepted */ rdmsr_from_l2(MSR_GS_BASE); /* not intercepted */ vmcall(); rdmsr_from_l2(MSR_GS_BASE); /* intercepted */ /* L2 TLB flush tests */ hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT, 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | HV_FLUSH_ALL_PROCESSORS); rdmsr_from_l2(MSR_FS_BASE); /* * Note: hypercall status (RAX) is not preserved correctly by L1 after * synthetic vmexit, use unchecked version. */ __hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT, 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | HV_FLUSH_ALL_PROCESSORS, &unused); /* Done, exit to L1 and never come back. */ vmcall(); } void guest_code(struct vmx_pages *vmx_pages, struct hyperv_test_pages *hv_pages, vm_vaddr_t hv_hcall_page_gpa) { #define L2_GUEST_STACK_SIZE 64 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID); wrmsr(HV_X64_MSR_HYPERCALL, hv_hcall_page_gpa); x2apic_enable(); GUEST_SYNC(1); GUEST_SYNC(2); enable_vp_assist(hv_pages->vp_assist_gpa, hv_pages->vp_assist); evmcs_enable(); GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages)); GUEST_SYNC(3); GUEST_ASSERT(load_evmcs(hv_pages)); GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa); GUEST_SYNC(4); GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa); prepare_vmcs(vmx_pages, l2_guest_code, &l2_guest_stack[L2_GUEST_STACK_SIZE]); GUEST_SYNC(5); GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa); current_evmcs->revision_id = -1u; GUEST_ASSERT(vmlaunch()); current_evmcs->revision_id = EVMCS_VERSION; GUEST_SYNC(6); vmwrite(PIN_BASED_VM_EXEC_CONTROL, vmreadz(PIN_BASED_VM_EXEC_CONTROL) | PIN_BASED_NMI_EXITING); /* L2 TLB flush setup */ current_evmcs->partition_assist_page = hv_pages->partition_assist_gpa; current_evmcs->hv_enlightenments_control.nested_flush_hypercall = 1; current_evmcs->hv_vm_id = 1; current_evmcs->hv_vp_id = 1; current_vp_assist->nested_control.features.directhypercall = 1; *(u32 *)(hv_pages->partition_assist) = 0; GUEST_ASSERT(!vmlaunch()); GUEST_ASSERT_EQ(vmreadz(VM_EXIT_REASON), EXIT_REASON_EXCEPTION_NMI); GUEST_ASSERT_EQ((vmreadz(VM_EXIT_INTR_INFO) & 0xff), NMI_VECTOR); GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa); /* * NMI forces L2->L1 exit, resuming L2 and hope that EVMCS is * up-to-date (RIP points where it should and not at the beginning * of l2_guest_code(). GUEST_SYNC(9) checkes that. */ GUEST_ASSERT(!vmresume()); GUEST_SYNC(10); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL); current_evmcs->guest_rip += 3; /* vmcall */ /* Intercept RDMSR 0xc0000100 */ vmwrite(CPU_BASED_VM_EXEC_CONTROL, vmreadz(CPU_BASED_VM_EXEC_CONTROL) | CPU_BASED_USE_MSR_BITMAPS); __set_bit(MSR_FS_BASE & 0x1fff, vmx_pages->msr + 0x400); GUEST_ASSERT(!vmresume()); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ); current_evmcs->guest_rip += 2; /* rdmsr */ /* Enable enlightened MSR bitmap */ current_evmcs->hv_enlightenments_control.msr_bitmap = 1; GUEST_ASSERT(!vmresume()); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ); current_evmcs->guest_rip += 2; /* rdmsr */ /* Intercept RDMSR 0xc0000101 without telling KVM about it */ __set_bit(MSR_GS_BASE & 0x1fff, vmx_pages->msr + 0x400); /* Make sure HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP is set */ current_evmcs->hv_clean_fields |= HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP; GUEST_ASSERT(!vmresume()); /* Make sure we don't see EXIT_REASON_MSR_READ here so eMSR bitmap works */ GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL); current_evmcs->guest_rip += 3; /* vmcall */ /* Now tell KVM we've changed MSR-Bitmap */ current_evmcs->hv_clean_fields &= ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP; GUEST_ASSERT(!vmresume()); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ); current_evmcs->guest_rip += 2; /* rdmsr */ /* * L2 TLB flush test. First VMCALL should be handled directly by L0, * no VMCALL exit expected. */ GUEST_ASSERT(!vmresume()); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ); current_evmcs->guest_rip += 2; /* rdmsr */ /* Enable synthetic vmexit */ *(u32 *)(hv_pages->partition_assist) = 1; GUEST_ASSERT(!vmresume()); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == HV_VMX_SYNTHETIC_EXIT_REASON_TRAP_AFTER_FLUSH); GUEST_ASSERT(!vmresume()); GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL); GUEST_SYNC(11); /* Try enlightened vmptrld with an incorrect GPA */ evmcs_vmptrld(0xdeadbeef, hv_pages->enlightened_vmcs); GUEST_ASSERT(vmlaunch()); GUEST_ASSERT(ud_count == 1); GUEST_DONE(); } void inject_nmi(struct kvm_vcpu *vcpu) { struct kvm_vcpu_events events; vcpu_events_get(vcpu, &events); events.nmi.pending = 1; events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING; vcpu_events_set(vcpu, &events); } static struct kvm_vcpu *save_restore_vm(struct kvm_vm *vm, struct kvm_vcpu *vcpu) { struct kvm_regs regs1, regs2; struct kvm_x86_state *state; state = vcpu_save_state(vcpu); memset(®s1, 0, sizeof(regs1)); vcpu_regs_get(vcpu, ®s1); kvm_vm_release(vm); /* Restore state in a new VM. */ vcpu = vm_recreate_with_one_vcpu(vm); vcpu_set_hv_cpuid(vcpu); vcpu_enable_evmcs(vcpu); vcpu_load_state(vcpu, state); kvm_x86_state_cleanup(state); memset(®s2, 0, sizeof(regs2)); vcpu_regs_get(vcpu, ®s2); TEST_ASSERT(!memcmp(®s1, ®s2, sizeof(regs2)), "Unexpected register values after vcpu_load_state; rdi: %lx rsi: %lx", (ulong) regs2.rdi, (ulong) regs2.rsi); return vcpu; } int main(int argc, char *argv[]) { vm_vaddr_t vmx_pages_gva = 0, hv_pages_gva = 0; vm_vaddr_t hcall_page; struct kvm_vcpu *vcpu; struct kvm_vm *vm; struct ucall uc; int stage; TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX)); TEST_REQUIRE(kvm_has_cap(KVM_CAP_NESTED_STATE)); TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)); TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_DIRECT_TLBFLUSH)); vm = vm_create_with_one_vcpu(&vcpu, guest_code); hcall_page = vm_vaddr_alloc_pages(vm, 1); memset(addr_gva2hva(vm, hcall_page), 0x0, getpagesize()); vcpu_set_hv_cpuid(vcpu); vcpu_enable_evmcs(vcpu); vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_alloc_hyperv_test_pages(vm, &hv_pages_gva); vcpu_args_set(vcpu, 3, vmx_pages_gva, hv_pages_gva, addr_gva2gpa(vm, hcall_page)); vcpu_set_msr(vcpu, HV_X64_MSR_VP_INDEX, vcpu->id); vm_install_exception_handler(vm, UD_VECTOR, guest_ud_handler); vm_install_exception_handler(vm, NMI_VECTOR, guest_nmi_handler); pr_info("Running L1 which uses EVMCS to run L2\n"); for (stage = 1;; stage++) { vcpu_run(vcpu); TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO); switch (get_ucall(vcpu, &uc)) { case UCALL_ABORT: REPORT_GUEST_ASSERT(uc); /* NOT REACHED */ case UCALL_SYNC: break; case UCALL_DONE: goto done; default: TEST_FAIL("Unknown ucall %lu", uc.cmd); } /* UCALL_SYNC is handled here. */ TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") && uc.args[1] == stage, "Stage %d: Unexpected register values vmexit, got %lx", stage, (ulong)uc.args[1]); vcpu = save_restore_vm(vm, vcpu); /* Force immediate L2->L1 exit before resuming */ if (stage == 8) { pr_info("Injecting NMI into L1 before L2 had a chance to run after restore\n"); inject_nmi(vcpu); } /* * Do KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE for a freshly * restored VM (before the first KVM_RUN) to check that * KVM_STATE_NESTED_EVMCS is not lost. */ if (stage == 9) { pr_info("Trying extra KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE cycle\n"); vcpu = save_restore_vm(vm, vcpu); } } done: kvm_vm_free(vm); }
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