mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-19 12:03:56 -04:00
7ce7f8e754
Drop the param-based guest assert macros and enable the printf versions for all selftests. Note! This change can affect tests even if they don't use directly use guest asserts! E.g. via library code, or due to the compiler making different optimization decisions. Link: https://lore.kernel.org/r/20230729003643.1053367-33-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
155 lines
3.1 KiB
C
155 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2020, Google LLC.
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*
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* Tests for KVM paravirtual feature disablement
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*/
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#include <asm/kvm_para.h>
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#include <linux/kvm_para.h>
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#include <stdint.h>
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#include "test_util.h"
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#include "kvm_util.h"
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#include "processor.h"
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struct msr_data {
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uint32_t idx;
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const char *name;
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};
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#define TEST_MSR(msr) { .idx = msr, .name = #msr }
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#define UCALL_PR_MSR 0xdeadbeef
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#define PR_MSR(msr) ucall(UCALL_PR_MSR, 1, msr)
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/*
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* KVM paravirtual msrs to test. Expect a #GP if any of these msrs are read or
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* written, as the KVM_CPUID_FEATURES leaf is cleared.
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*/
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static struct msr_data msrs_to_test[] = {
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TEST_MSR(MSR_KVM_SYSTEM_TIME),
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TEST_MSR(MSR_KVM_SYSTEM_TIME_NEW),
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TEST_MSR(MSR_KVM_WALL_CLOCK),
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TEST_MSR(MSR_KVM_WALL_CLOCK_NEW),
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TEST_MSR(MSR_KVM_ASYNC_PF_EN),
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TEST_MSR(MSR_KVM_STEAL_TIME),
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TEST_MSR(MSR_KVM_PV_EOI_EN),
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TEST_MSR(MSR_KVM_POLL_CONTROL),
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TEST_MSR(MSR_KVM_ASYNC_PF_INT),
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TEST_MSR(MSR_KVM_ASYNC_PF_ACK),
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};
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static void test_msr(struct msr_data *msr)
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{
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uint64_t ignored;
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uint8_t vector;
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PR_MSR(msr);
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vector = rdmsr_safe(msr->idx, &ignored);
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GUEST_ASSERT_EQ(vector, GP_VECTOR);
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vector = wrmsr_safe(msr->idx, 0);
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GUEST_ASSERT_EQ(vector, GP_VECTOR);
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}
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struct hcall_data {
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uint64_t nr;
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const char *name;
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};
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#define TEST_HCALL(hc) { .nr = hc, .name = #hc }
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#define UCALL_PR_HCALL 0xdeadc0de
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#define PR_HCALL(hc) ucall(UCALL_PR_HCALL, 1, hc)
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/*
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* KVM hypercalls to test. Expect -KVM_ENOSYS when called, as the corresponding
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* features have been cleared in KVM_CPUID_FEATURES.
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*/
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static struct hcall_data hcalls_to_test[] = {
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TEST_HCALL(KVM_HC_KICK_CPU),
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TEST_HCALL(KVM_HC_SEND_IPI),
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TEST_HCALL(KVM_HC_SCHED_YIELD),
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};
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static void test_hcall(struct hcall_data *hc)
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{
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uint64_t r;
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PR_HCALL(hc);
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r = kvm_hypercall(hc->nr, 0, 0, 0, 0);
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GUEST_ASSERT_EQ(r, -KVM_ENOSYS);
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}
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static void guest_main(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(msrs_to_test); i++) {
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test_msr(&msrs_to_test[i]);
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}
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for (i = 0; i < ARRAY_SIZE(hcalls_to_test); i++) {
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test_hcall(&hcalls_to_test[i]);
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}
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GUEST_DONE();
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}
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static void pr_msr(struct ucall *uc)
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{
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struct msr_data *msr = (struct msr_data *)uc->args[0];
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pr_info("testing msr: %s (%#x)\n", msr->name, msr->idx);
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}
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static void pr_hcall(struct ucall *uc)
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{
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struct hcall_data *hc = (struct hcall_data *)uc->args[0];
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pr_info("testing hcall: %s (%lu)\n", hc->name, hc->nr);
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}
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static void enter_guest(struct kvm_vcpu *vcpu)
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{
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struct ucall uc;
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while (true) {
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vcpu_run(vcpu);
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
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switch (get_ucall(vcpu, &uc)) {
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case UCALL_PR_MSR:
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pr_msr(&uc);
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break;
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case UCALL_PR_HCALL:
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pr_hcall(&uc);
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break;
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case UCALL_ABORT:
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REPORT_GUEST_ASSERT(uc);
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return;
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case UCALL_DONE:
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return;
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}
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}
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}
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int main(void)
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{
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struct kvm_vcpu *vcpu;
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struct kvm_vm *vm;
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TEST_REQUIRE(kvm_has_cap(KVM_CAP_ENFORCE_PV_FEATURE_CPUID));
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vm = vm_create_with_one_vcpu(&vcpu, guest_main);
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vcpu_enable_cap(vcpu, KVM_CAP_ENFORCE_PV_FEATURE_CPUID, 1);
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vcpu_clear_cpuid_entry(vcpu, KVM_CPUID_FEATURES);
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vm_init_descriptor_tables(vm);
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vcpu_init_descriptor_tables(vcpu);
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enter_guest(vcpu);
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kvm_vm_free(vm);
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}
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