98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Test Hyper-V extended hypercall, HV_EXT_CALL_QUERY_CAPABILITIES (0x8001),
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* exit to userspace and receive result in guest.
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*
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* Negative tests are present in hyperv_features.c
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*
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* Copyright 2022 Google LLC
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* Author: Vipin Sharma <vipinsh@google.com>
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*/
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#include "kvm_util.h"
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#include "processor.h"
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#include "hyperv.h"
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/* Any value is fine */
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#define EXT_CAPABILITIES 0xbull
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static void guest_code(vm_paddr_t in_pg_gpa, vm_paddr_t out_pg_gpa,
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vm_vaddr_t out_pg_gva)
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{
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uint64_t *output_gva;
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wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID);
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wrmsr(HV_X64_MSR_HYPERCALL, in_pg_gpa);
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output_gva = (uint64_t *)out_pg_gva;
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hyperv_hypercall(HV_EXT_CALL_QUERY_CAPABILITIES, in_pg_gpa, out_pg_gpa);
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/* TLFS states output will be a uint64_t value */
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GUEST_ASSERT_EQ(*output_gva, EXT_CAPABILITIES);
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GUEST_DONE();
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}
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int main(void)
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{
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vm_vaddr_t hcall_out_page;
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vm_vaddr_t hcall_in_page;
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struct kvm_vcpu *vcpu;
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struct kvm_run *run;
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struct kvm_vm *vm;
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uint64_t *outval;
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struct ucall uc;
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/* Verify if extended hypercalls are supported */
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if (!kvm_cpuid_has(kvm_get_supported_hv_cpuid(),
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HV_ENABLE_EXTENDED_HYPERCALLS)) {
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print_skip("Extended calls not supported by the kernel");
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exit(KSFT_SKIP);
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}
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vm = vm_create_with_one_vcpu(&vcpu, guest_code);
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run = vcpu->run;
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vcpu_set_hv_cpuid(vcpu);
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/* Hypercall input */
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hcall_in_page = vm_vaddr_alloc_pages(vm, 1);
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memset(addr_gva2hva(vm, hcall_in_page), 0x0, vm->page_size);
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/* Hypercall output */
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hcall_out_page = vm_vaddr_alloc_pages(vm, 1);
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memset(addr_gva2hva(vm, hcall_out_page), 0x0, vm->page_size);
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vcpu_args_set(vcpu, 3, addr_gva2gpa(vm, hcall_in_page),
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addr_gva2gpa(vm, hcall_out_page), hcall_out_page);
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vcpu_run(vcpu);
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TEST_ASSERT(run->exit_reason == KVM_EXIT_HYPERV,
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"Unexpected exit reason: %u (%s)",
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run->exit_reason, exit_reason_str(run->exit_reason));
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outval = addr_gpa2hva(vm, run->hyperv.u.hcall.params[1]);
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*outval = EXT_CAPABILITIES;
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run->hyperv.u.hcall.result = HV_STATUS_SUCCESS;
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vcpu_run(vcpu);
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TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
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"Unexpected exit reason: %u (%s)",
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run->exit_reason, exit_reason_str(run->exit_reason));
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switch (get_ucall(vcpu, &uc)) {
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case UCALL_ABORT:
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REPORT_GUEST_ASSERT_2(uc, "arg1 = %ld, arg2 = %ld");
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break;
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case UCALL_DONE:
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break;
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default:
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TEST_FAIL("Unhandled ucall: %ld", uc.cmd);
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}
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kvm_vm_free(vm);
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return 0;
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}
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