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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2020, Red Hat, Inc.4 */5#include "guest_modes.h"6 7#ifdef __aarch64__8#include "processor.h"9enum vm_guest_mode vm_mode_default;10#endif11 12struct guest_mode guest_modes[NUM_VM_MODES];13 14void guest_modes_append_default(void)15{16#ifndef __aarch64__17 guest_mode_append(VM_MODE_DEFAULT, true);18#else19 {20 unsigned int limit = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);21 uint32_t ipa4k, ipa16k, ipa64k;22 int i;23 24 aarch64_get_supported_page_sizes(limit, &ipa4k, &ipa16k, &ipa64k);25 26 guest_mode_append(VM_MODE_P52V48_4K, ipa4k >= 52);27 guest_mode_append(VM_MODE_P52V48_16K, ipa16k >= 52);28 guest_mode_append(VM_MODE_P52V48_64K, ipa64k >= 52);29 30 guest_mode_append(VM_MODE_P48V48_4K, ipa4k >= 48);31 guest_mode_append(VM_MODE_P48V48_16K, ipa16k >= 48);32 guest_mode_append(VM_MODE_P48V48_64K, ipa64k >= 48);33 34 guest_mode_append(VM_MODE_P40V48_4K, ipa4k >= 40);35 guest_mode_append(VM_MODE_P40V48_16K, ipa16k >= 40);36 guest_mode_append(VM_MODE_P40V48_64K, ipa64k >= 40);37 38 guest_mode_append(VM_MODE_P36V48_4K, ipa4k >= 36);39 guest_mode_append(VM_MODE_P36V48_16K, ipa16k >= 36);40 guest_mode_append(VM_MODE_P36V48_64K, ipa64k >= 36);41 guest_mode_append(VM_MODE_P36V47_16K, ipa16k >= 36);42 43 vm_mode_default = ipa4k >= 40 ? VM_MODE_P40V48_4K : NUM_VM_MODES;44 45 /*46 * Pick the first supported IPA size if the default47 * isn't available.48 */49 for (i = 0; vm_mode_default == NUM_VM_MODES && i < NUM_VM_MODES; i++) {50 if (guest_modes[i].supported && guest_modes[i].enabled)51 vm_mode_default = i;52 }53 54 TEST_ASSERT(vm_mode_default != NUM_VM_MODES,55 "No supported mode!");56 }57#endif58#ifdef __s390x__59 {60 int kvm_fd, vm_fd;61 struct kvm_s390_vm_cpu_processor info;62 63 kvm_fd = open_kvm_dev_path_or_exit();64 vm_fd = __kvm_ioctl(kvm_fd, KVM_CREATE_VM, NULL);65 kvm_device_attr_get(vm_fd, KVM_S390_VM_CPU_MODEL,66 KVM_S390_VM_CPU_PROCESSOR, &info);67 close(vm_fd);68 close(kvm_fd);69 /* Starting with z13 we have 47bits of physical address */70 if (info.ibc >= 0x30)71 guest_mode_append(VM_MODE_P47V64_4K, true);72 }73#endif74#ifdef __riscv75 {76 unsigned int sz = kvm_check_cap(KVM_CAP_VM_GPA_BITS);77 78 if (sz >= 52)79 guest_mode_append(VM_MODE_P52V48_4K, true);80 if (sz >= 48)81 guest_mode_append(VM_MODE_P48V48_4K, true);82 }83#endif84}85 86void for_each_guest_mode(void (*func)(enum vm_guest_mode, void *), void *arg)87{88 int i;89 90 for (i = 0; i < NUM_VM_MODES; ++i) {91 if (!guest_modes[i].enabled)92 continue;93 TEST_ASSERT(guest_modes[i].supported,94 "Guest mode ID %d (%s) not supported.",95 i, vm_guest_mode_string(i));96 func(i, arg);97 }98}99 100void guest_modes_help(void)101{102 int i;103 104 printf(" -m: specify the guest mode ID to test\n"105 " (default: test all supported modes)\n"106 " This option may be used multiple times.\n"107 " Guest mode IDs:\n");108 for (i = 0; i < NUM_VM_MODES; ++i) {109 printf(" %d: %s%s\n", i, vm_guest_mode_string(i),110 guest_modes[i].supported ? " (supported)" : "");111 }112}113 114void guest_modes_cmdline(const char *arg)115{116 static bool mode_selected;117 unsigned int mode;118 int i;119 120 if (!mode_selected) {121 for (i = 0; i < NUM_VM_MODES; ++i)122 guest_modes[i].enabled = false;123 mode_selected = true;124 }125 126 mode = atoi_non_negative("Guest mode ID", arg);127 TEST_ASSERT(mode < NUM_VM_MODES, "Guest mode ID %d too big", mode);128 guest_modes[mode].enabled = true;129}130