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1// SPDX-License-Identifier: GPL-2.02/*3 * Test for x86 KVM_CAP_MSR_PLATFORM_INFO4 *5 * Copyright (C) 2018, Google LLC.6 *7 * This work is licensed under the terms of the GNU GPL, version 2.8 *9 * Verifies expected behavior of controlling guest access to10 * MSR_PLATFORM_INFO.11 */12#include <fcntl.h>13#include <stdio.h>14#include <stdlib.h>15#include <string.h>16#include <sys/ioctl.h>17 18#include "test_util.h"19#include "kvm_util.h"20#include "processor.h"21 22#define MSR_PLATFORM_INFO_MAX_TURBO_RATIO 0xff0023 24static void guest_code(void)25{26 uint64_t msr_platform_info;27 uint8_t vector;28 29 GUEST_SYNC(true);30 msr_platform_info = rdmsr(MSR_PLATFORM_INFO);31 GUEST_ASSERT_EQ(msr_platform_info & MSR_PLATFORM_INFO_MAX_TURBO_RATIO,32 MSR_PLATFORM_INFO_MAX_TURBO_RATIO);33 34 GUEST_SYNC(false);35 vector = rdmsr_safe(MSR_PLATFORM_INFO, &msr_platform_info);36 GUEST_ASSERT_EQ(vector, GP_VECTOR);37 38 GUEST_DONE();39}40 41int main(int argc, char *argv[])42{43 struct kvm_vcpu *vcpu;44 struct kvm_vm *vm;45 uint64_t msr_platform_info;46 struct ucall uc;47 48 TEST_REQUIRE(kvm_has_cap(KVM_CAP_MSR_PLATFORM_INFO));49 50 vm = vm_create_with_one_vcpu(&vcpu, guest_code);51 52 msr_platform_info = vcpu_get_msr(vcpu, MSR_PLATFORM_INFO);53 vcpu_set_msr(vcpu, MSR_PLATFORM_INFO,54 msr_platform_info | MSR_PLATFORM_INFO_MAX_TURBO_RATIO);55 56 for (;;) {57 vcpu_run(vcpu);58 TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);59 60 switch (get_ucall(vcpu, &uc)) {61 case UCALL_SYNC:62 vm_enable_cap(vm, KVM_CAP_MSR_PLATFORM_INFO, uc.args[1]);63 break;64 case UCALL_DONE:65 goto done;66 case UCALL_ABORT:67 REPORT_GUEST_ASSERT(uc);68 default:69 TEST_FAIL("Unexpected ucall %lu", uc.cmd);70 break;71 }72 }73 74done:75 vcpu_set_msr(vcpu, MSR_PLATFORM_INFO, msr_platform_info);76 77 kvm_vm_free(vm);78 79 return 0;80}81