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85819fa0e3
Now that KVM selftests use gva_t instead of vm_vaddr_t, drop "vaddr_" from the core memory allocation APIs as the information is extraneous and does more harm than good. E.g. the APIs don't _just_ allocate virtual memory, they allocate backing physical memory and install mappings in the guest page tables. And as proven by kmalloc() and malloc(), developers generally expect that allocations come with a working virtual address. Opportunistically clean up the function comment for vm_alloc(), and drop the misleading and superfluous comments for its wrappers. No functional change intended. Link: https://patch.msgid.link/20260420212004.3938325-12-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
99 lines
2.4 KiB
C
99 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(gpa_t in_pg_gpa, gpa_t out_pg_gpa,
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gva_t out_pg_gva)
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{
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u64 *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 = (u64 *)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 u64 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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gva_t hcall_out_page;
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gva_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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u64 *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_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_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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