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Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/hyperv_features.c')
-rw-r--r--tools/testing/selftests/kvm/x86_64/hyperv_features.c624
1 files changed, 0 insertions, 624 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
deleted file mode 100644
index 3163c3e8db0a..000000000000
--- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c
+++ /dev/null
@@ -1,624 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2021, Red Hat, Inc.
- *
- * Tests for Hyper-V features enablement
- */
-#include <asm/kvm_para.h>
-#include <linux/kvm_para.h>
-#include <stdint.h>
-
-#include "test_util.h"
-#include "kvm_util.h"
-#include "processor.h"
-#include "hyperv.h"
-
-struct msr_data {
- uint32_t idx;
- bool available;
- bool write;
- u64 write_val;
-};
-
-struct hcall_data {
- uint64_t control;
- uint64_t expect;
- bool ud_expected;
-};
-
-static void guest_msr(struct msr_data *msr)
-{
- uint64_t ignored;
- uint8_t vector;
-
- GUEST_ASSERT(msr->idx);
-
- if (!msr->write)
- vector = rdmsr_safe(msr->idx, &ignored);
- else
- vector = wrmsr_safe(msr->idx, msr->write_val);
-
- if (msr->available)
- GUEST_ASSERT_2(!vector, msr->idx, vector);
- else
- GUEST_ASSERT_2(vector == GP_VECTOR, msr->idx, vector);
- GUEST_DONE();
-}
-
-static void guest_hcall(vm_vaddr_t pgs_gpa, struct hcall_data *hcall)
-{
- u64 res, input, output;
- uint8_t vector;
-
- GUEST_ASSERT(hcall->control);
-
- wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID);
- wrmsr(HV_X64_MSR_HYPERCALL, pgs_gpa);
-
- if (!(hcall->control & HV_HYPERCALL_FAST_BIT)) {
- input = pgs_gpa;
- output = pgs_gpa + 4096;
- } else {
- input = output = 0;
- }
-
- vector = __hyperv_hypercall(hcall->control, input, output, &res);
- if (hcall->ud_expected) {
- GUEST_ASSERT_2(vector == UD_VECTOR, hcall->control, vector);
- } else {
- GUEST_ASSERT_2(!vector, hcall->control, vector);
- GUEST_ASSERT_2(res == hcall->expect, hcall->expect, res);
- }
-
- GUEST_DONE();
-}
-
-static void vcpu_reset_hv_cpuid(struct kvm_vcpu *vcpu)
-{
- /*
- * Enable all supported Hyper-V features, then clear the leafs holding
- * the features that will be tested one by one.
- */
- vcpu_set_hv_cpuid(vcpu);
-
- vcpu_clear_cpuid_entry(vcpu, HYPERV_CPUID_FEATURES);
- vcpu_clear_cpuid_entry(vcpu, HYPERV_CPUID_ENLIGHTMENT_INFO);
- vcpu_clear_cpuid_entry(vcpu, HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES);
-}
-
-static void guest_test_msrs_access(void)
-{
- struct kvm_cpuid2 *prev_cpuid = NULL;
- struct kvm_cpuid_entry2 *feat, *dbg;
- struct kvm_vcpu *vcpu;
- struct kvm_run *run;
- struct kvm_vm *vm;
- struct ucall uc;
- int stage = 0;
- vm_vaddr_t msr_gva;
- struct msr_data *msr;
-
- while (true) {
- vm = vm_create_with_one_vcpu(&vcpu, guest_msr);
-
- msr_gva = vm_vaddr_alloc_page(vm);
- memset(addr_gva2hva(vm, msr_gva), 0x0, getpagesize());
- msr = addr_gva2hva(vm, msr_gva);
-
- vcpu_args_set(vcpu, 1, msr_gva);
- vcpu_enable_cap(vcpu, KVM_CAP_HYPERV_ENFORCE_CPUID, 1);
-
- if (!prev_cpuid) {
- vcpu_reset_hv_cpuid(vcpu);
-
- prev_cpuid = allocate_kvm_cpuid2(vcpu->cpuid->nent);
- } else {
- vcpu_init_cpuid(vcpu, prev_cpuid);
- }
-
- feat = vcpu_get_cpuid_entry(vcpu, HYPERV_CPUID_FEATURES);
- dbg = vcpu_get_cpuid_entry(vcpu, HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES);
-
- vm_init_descriptor_tables(vm);
- vcpu_init_descriptor_tables(vcpu);
-
- run = vcpu->run;
-
- /* TODO: Make this entire test easier to maintain. */
- if (stage >= 21)
- vcpu_enable_cap(vcpu, KVM_CAP_HYPERV_SYNIC2, 0);
-
- switch (stage) {
- case 0:
- /*
- * Only available when Hyper-V identification is set
- */
- msr->idx = HV_X64_MSR_GUEST_OS_ID;
- msr->write = 0;
- msr->available = 0;
- break;
- case 1:
- msr->idx = HV_X64_MSR_HYPERCALL;
- msr->write = 0;
- msr->available = 0;
- break;
- case 2:
- feat->eax |= HV_MSR_HYPERCALL_AVAILABLE;
- /*
- * HV_X64_MSR_GUEST_OS_ID has to be written first to make
- * HV_X64_MSR_HYPERCALL available.
- */
- msr->idx = HV_X64_MSR_GUEST_OS_ID;
- msr->write = 1;
- msr->write_val = HYPERV_LINUX_OS_ID;
- msr->available = 1;
- break;
- case 3:
- msr->idx = HV_X64_MSR_GUEST_OS_ID;
- msr->write = 0;
- msr->available = 1;
- break;
- case 4:
- msr->idx = HV_X64_MSR_HYPERCALL;
- msr->write = 0;
- msr->available = 1;
- break;
-
- case 5:
- msr->idx = HV_X64_MSR_VP_RUNTIME;
- msr->write = 0;
- msr->available = 0;
- break;
- case 6:
- feat->eax |= HV_MSR_VP_RUNTIME_AVAILABLE;
- msr->idx = HV_X64_MSR_VP_RUNTIME;
- msr->write = 0;
- msr->available = 1;
- break;
- case 7:
- /* Read only */
- msr->idx = HV_X64_MSR_VP_RUNTIME;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 0;
- break;
-
- case 8:
- msr->idx = HV_X64_MSR_TIME_REF_COUNT;
- msr->write = 0;
- msr->available = 0;
- break;
- case 9:
- feat->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
- msr->idx = HV_X64_MSR_TIME_REF_COUNT;
- msr->write = 0;
- msr->available = 1;
- break;
- case 10:
- /* Read only */
- msr->idx = HV_X64_MSR_TIME_REF_COUNT;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 0;
- break;
-
- case 11:
- msr->idx = HV_X64_MSR_VP_INDEX;
- msr->write = 0;
- msr->available = 0;
- break;
- case 12:
- feat->eax |= HV_MSR_VP_INDEX_AVAILABLE;
- msr->idx = HV_X64_MSR_VP_INDEX;
- msr->write = 0;
- msr->available = 1;
- break;
- case 13:
- /* Read only */
- msr->idx = HV_X64_MSR_VP_INDEX;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 0;
- break;
-
- case 14:
- msr->idx = HV_X64_MSR_RESET;
- msr->write = 0;
- msr->available = 0;
- break;
- case 15:
- feat->eax |= HV_MSR_RESET_AVAILABLE;
- msr->idx = HV_X64_MSR_RESET;
- msr->write = 0;
- msr->available = 1;
- break;
- case 16:
- msr->idx = HV_X64_MSR_RESET;
- msr->write = 1;
- msr->write_val = 0;
- msr->available = 1;
- break;
-
- case 17:
- msr->idx = HV_X64_MSR_REFERENCE_TSC;
- msr->write = 0;
- msr->available = 0;
- break;
- case 18:
- feat->eax |= HV_MSR_REFERENCE_TSC_AVAILABLE;
- msr->idx = HV_X64_MSR_REFERENCE_TSC;
- msr->write = 0;
- msr->available = 1;
- break;
- case 19:
- msr->idx = HV_X64_MSR_REFERENCE_TSC;
- msr->write = 1;
- msr->write_val = 0;
- msr->available = 1;
- break;
-
- case 20:
- msr->idx = HV_X64_MSR_EOM;
- msr->write = 0;
- msr->available = 0;
- break;
- case 21:
- /*
- * Remains unavailable even with KVM_CAP_HYPERV_SYNIC2
- * capability enabled and guest visible CPUID bit unset.
- */
- msr->idx = HV_X64_MSR_EOM;
- msr->write = 0;
- msr->available = 0;
- break;
- case 22:
- feat->eax |= HV_MSR_SYNIC_AVAILABLE;
- msr->idx = HV_X64_MSR_EOM;
- msr->write = 0;
- msr->available = 1;
- break;
- case 23:
- msr->idx = HV_X64_MSR_EOM;
- msr->write = 1;
- msr->write_val = 0;
- msr->available = 1;
- break;
-
- case 24:
- msr->idx = HV_X64_MSR_STIMER0_CONFIG;
- msr->write = 0;
- msr->available = 0;
- break;
- case 25:
- feat->eax |= HV_MSR_SYNTIMER_AVAILABLE;
- msr->idx = HV_X64_MSR_STIMER0_CONFIG;
- msr->write = 0;
- msr->available = 1;
- break;
- case 26:
- msr->idx = HV_X64_MSR_STIMER0_CONFIG;
- msr->write = 1;
- msr->write_val = 0;
- msr->available = 1;
- break;
- case 27:
- /* Direct mode test */
- msr->idx = HV_X64_MSR_STIMER0_CONFIG;
- msr->write = 1;
- msr->write_val = 1 << 12;
- msr->available = 0;
- break;
- case 28:
- feat->edx |= HV_STIMER_DIRECT_MODE_AVAILABLE;
- msr->idx = HV_X64_MSR_STIMER0_CONFIG;
- msr->write = 1;
- msr->write_val = 1 << 12;
- msr->available = 1;
- break;
-
- case 29:
- msr->idx = HV_X64_MSR_EOI;
- msr->write = 0;
- msr->available = 0;
- break;
- case 30:
- feat->eax |= HV_MSR_APIC_ACCESS_AVAILABLE;
- msr->idx = HV_X64_MSR_EOI;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 1;
- break;
-
- case 31:
- msr->idx = HV_X64_MSR_TSC_FREQUENCY;
- msr->write = 0;
- msr->available = 0;
- break;
- case 32:
- feat->eax |= HV_ACCESS_FREQUENCY_MSRS;
- msr->idx = HV_X64_MSR_TSC_FREQUENCY;
- msr->write = 0;
- msr->available = 1;
- break;
- case 33:
- /* Read only */
- msr->idx = HV_X64_MSR_TSC_FREQUENCY;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 0;
- break;
-
- case 34:
- msr->idx = HV_X64_MSR_REENLIGHTENMENT_CONTROL;
- msr->write = 0;
- msr->available = 0;
- break;
- case 35:
- feat->eax |= HV_ACCESS_REENLIGHTENMENT;
- msr->idx = HV_X64_MSR_REENLIGHTENMENT_CONTROL;
- msr->write = 0;
- msr->available = 1;
- break;
- case 36:
- msr->idx = HV_X64_MSR_REENLIGHTENMENT_CONTROL;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 1;
- break;
- case 37:
- /* Can only write '0' */
- msr->idx = HV_X64_MSR_TSC_EMULATION_STATUS;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 0;
- break;
-
- case 38:
- msr->idx = HV_X64_MSR_CRASH_P0;
- msr->write = 0;
- msr->available = 0;
- break;
- case 39:
- feat->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
- msr->idx = HV_X64_MSR_CRASH_P0;
- msr->write = 0;
- msr->available = 1;
- break;
- case 40:
- msr->idx = HV_X64_MSR_CRASH_P0;
- msr->write = 1;
- msr->write_val = 1;
- msr->available = 1;
- break;
-
- case 41:
- msr->idx = HV_X64_MSR_SYNDBG_STATUS;
- msr->write = 0;
- msr->available = 0;
- break;
- case 42:
- feat->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE;
- dbg->eax |= HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
- msr->idx = HV_X64_MSR_SYNDBG_STATUS;
- msr->write = 0;
- msr->available = 1;
- break;
- case 43:
- msr->idx = HV_X64_MSR_SYNDBG_STATUS;
- msr->write = 1;
- msr->write_val = 0;
- msr->available = 1;
- break;
-
- case 44:
- kvm_vm_free(vm);
- return;
- }
-
- vcpu_set_cpuid(vcpu);
-
- memcpy(prev_cpuid, vcpu->cpuid, kvm_cpuid2_size(vcpu->cpuid->nent));
-
- pr_debug("Stage %d: testing msr: 0x%x for %s\n", stage,
- msr->idx, msr->write ? "write" : "read");
-
- vcpu_run(vcpu);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
- "unexpected exit reason: %u (%s)",
- run->exit_reason, exit_reason_str(run->exit_reason));
-
- switch (get_ucall(vcpu, &uc)) {
- case UCALL_ABORT:
- REPORT_GUEST_ASSERT_2(uc, "MSR = %lx, vector = %lx");
- return;
- case UCALL_DONE:
- break;
- default:
- TEST_FAIL("Unhandled ucall: %ld", uc.cmd);
- return;
- }
-
- stage++;
- kvm_vm_free(vm);
- }
-}
-
-static void guest_test_hcalls_access(void)
-{
- struct kvm_cpuid_entry2 *feat, *recomm, *dbg;
- struct kvm_cpuid2 *prev_cpuid = NULL;
- struct kvm_vcpu *vcpu;
- struct kvm_run *run;
- struct kvm_vm *vm;
- struct ucall uc;
- int stage = 0;
- vm_vaddr_t hcall_page, hcall_params;
- struct hcall_data *hcall;
-
- while (true) {
- vm = vm_create_with_one_vcpu(&vcpu, guest_hcall);
-
- vm_init_descriptor_tables(vm);
- vcpu_init_descriptor_tables(vcpu);
-
- /* Hypercall input/output */
- hcall_page = vm_vaddr_alloc_pages(vm, 2);
- memset(addr_gva2hva(vm, hcall_page), 0x0, 2 * getpagesize());
-
- hcall_params = vm_vaddr_alloc_page(vm);
- memset(addr_gva2hva(vm, hcall_params), 0x0, getpagesize());
- hcall = addr_gva2hva(vm, hcall_params);
-
- vcpu_args_set(vcpu, 2, addr_gva2gpa(vm, hcall_page), hcall_params);
- vcpu_enable_cap(vcpu, KVM_CAP_HYPERV_ENFORCE_CPUID, 1);
-
- if (!prev_cpuid) {
- vcpu_reset_hv_cpuid(vcpu);
-
- prev_cpuid = allocate_kvm_cpuid2(vcpu->cpuid->nent);
- } else {
- vcpu_init_cpuid(vcpu, prev_cpuid);
- }
-
- feat = vcpu_get_cpuid_entry(vcpu, HYPERV_CPUID_FEATURES);
- recomm = vcpu_get_cpuid_entry(vcpu, HYPERV_CPUID_ENLIGHTMENT_INFO);
- dbg = vcpu_get_cpuid_entry(vcpu, HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES);
-
- run = vcpu->run;
-
- switch (stage) {
- case 0:
- feat->eax |= HV_MSR_HYPERCALL_AVAILABLE;
- hcall->control = 0xbeef;
- hcall->expect = HV_STATUS_INVALID_HYPERCALL_CODE;
- break;
-
- case 1:
- hcall->control = HVCALL_POST_MESSAGE;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 2:
- feat->ebx |= HV_POST_MESSAGES;
- hcall->control = HVCALL_POST_MESSAGE;
- hcall->expect = HV_STATUS_INVALID_HYPERCALL_INPUT;
- break;
-
- case 3:
- hcall->control = HVCALL_SIGNAL_EVENT;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 4:
- feat->ebx |= HV_SIGNAL_EVENTS;
- hcall->control = HVCALL_SIGNAL_EVENT;
- hcall->expect = HV_STATUS_INVALID_HYPERCALL_INPUT;
- break;
-
- case 5:
- hcall->control = HVCALL_RESET_DEBUG_SESSION;
- hcall->expect = HV_STATUS_INVALID_HYPERCALL_CODE;
- break;
- case 6:
- dbg->eax |= HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
- hcall->control = HVCALL_RESET_DEBUG_SESSION;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 7:
- feat->ebx |= HV_DEBUGGING;
- hcall->control = HVCALL_RESET_DEBUG_SESSION;
- hcall->expect = HV_STATUS_OPERATION_DENIED;
- break;
-
- case 8:
- hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 9:
- recomm->eax |= HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
- hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE;
- hcall->expect = HV_STATUS_SUCCESS;
- break;
- case 10:
- hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 11:
- recomm->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED;
- hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX;
- hcall->expect = HV_STATUS_SUCCESS;
- break;
-
- case 12:
- hcall->control = HVCALL_SEND_IPI;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 13:
- recomm->eax |= HV_X64_CLUSTER_IPI_RECOMMENDED;
- hcall->control = HVCALL_SEND_IPI;
- hcall->expect = HV_STATUS_INVALID_HYPERCALL_INPUT;
- break;
- case 14:
- /* Nothing in 'sparse banks' -> success */
- hcall->control = HVCALL_SEND_IPI_EX;
- hcall->expect = HV_STATUS_SUCCESS;
- break;
-
- case 15:
- hcall->control = HVCALL_NOTIFY_LONG_SPIN_WAIT;
- hcall->expect = HV_STATUS_ACCESS_DENIED;
- break;
- case 16:
- recomm->ebx = 0xfff;
- hcall->control = HVCALL_NOTIFY_LONG_SPIN_WAIT;
- hcall->expect = HV_STATUS_SUCCESS;
- break;
- case 17:
- /* XMM fast hypercall */
- hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT;
- hcall->ud_expected = true;
- break;
- case 18:
- feat->edx |= HV_X64_HYPERCALL_XMM_INPUT_AVAILABLE;
- hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT;
- hcall->ud_expected = false;
- hcall->expect = HV_STATUS_SUCCESS;
- break;
- case 19:
- kvm_vm_free(vm);
- return;
- }
-
- vcpu_set_cpuid(vcpu);
-
- memcpy(prev_cpuid, vcpu->cpuid, kvm_cpuid2_size(vcpu->cpuid->nent));
-
- pr_debug("Stage %d: testing hcall: 0x%lx\n", stage, hcall->control);
-
- vcpu_run(vcpu);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
- "unexpected exit reason: %u (%s)",
- run->exit_reason, exit_reason_str(run->exit_reason));
-
- switch (get_ucall(vcpu, &uc)) {
- case UCALL_ABORT:
- REPORT_GUEST_ASSERT_2(uc, "arg1 = %lx, arg2 = %lx");
- return;
- case UCALL_DONE:
- break;
- default:
- TEST_FAIL("Unhandled ucall: %ld", uc.cmd);
- return;
- }
-
- stage++;
- kvm_vm_free(vm);
- }
-}
-
-int main(void)
-{
- pr_info("Testing access to Hyper-V specific MSRs\n");
- guest_test_msrs_access();
-
- pr_info("Testing access to Hyper-V hypercalls\n");
- guest_test_hcalls_access();
-}
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