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67730e6c53
Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
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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TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_CPUID));
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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(uc);
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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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