79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Test for x86 KVM_CAP_MSR_PLATFORM_INFO
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*
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* Copyright (C) 2018, Google LLC.
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*
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* This work is licensed under the terms of the GNU GPL, version 2.
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*
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* Verifies expected behavior of controlling guest access to
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* MSR_PLATFORM_INFO.
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.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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#define MSR_PLATFORM_INFO_MAX_TURBO_RATIO 0xff00
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static void guest_code(void)
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{
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uint64_t msr_platform_info;
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uint8_t vector;
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GUEST_SYNC(true);
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msr_platform_info = rdmsr(MSR_PLATFORM_INFO);
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GUEST_ASSERT_EQ(msr_platform_info & MSR_PLATFORM_INFO_MAX_TURBO_RATIO,
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MSR_PLATFORM_INFO_MAX_TURBO_RATIO);
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GUEST_SYNC(false);
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vector = rdmsr_safe(MSR_PLATFORM_INFO, &msr_platform_info);
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GUEST_ASSERT_EQ(vector, GP_VECTOR);
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GUEST_DONE();
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}
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int main(int argc, char *argv[])
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{
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struct kvm_vcpu *vcpu;
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struct kvm_vm *vm;
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uint64_t msr_platform_info;
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struct ucall uc;
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TEST_REQUIRE(kvm_has_cap(KVM_CAP_MSR_PLATFORM_INFO));
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vm = vm_create_with_one_vcpu(&vcpu, guest_code);
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msr_platform_info = vcpu_get_msr(vcpu, MSR_PLATFORM_INFO);
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vcpu_set_msr(vcpu, MSR_PLATFORM_INFO,
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msr_platform_info | MSR_PLATFORM_INFO_MAX_TURBO_RATIO);
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for (;;) {
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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_SYNC:
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vm_enable_cap(vm, KVM_CAP_MSR_PLATFORM_INFO, uc.args[1]);
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break;
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case UCALL_DONE:
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goto done;
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case UCALL_ABORT:
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REPORT_GUEST_ASSERT(uc);
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default:
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TEST_FAIL("Unexpected ucall %lu", uc.cmd);
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break;
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}
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}
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done:
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kvm_vm_free(vm);
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return 0;
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}
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