diff options
Diffstat (limited to 'test')
| -rwxr-xr-x | test/.gitignore | 18 | ||||
| -rw-r--r-- | test/access.c | 30 | ||||
| -rw-r--r-- | test/aes-detect.c | 85 | ||||
| -rw-r--r-- | test/aes-detect.h | 3 | ||||
| -rw-r--r-- | test/eviction.c | 20 | ||||
| -rwxr-xr-x | test/fulltrack | bin | 1326680 -> 0 bytes | |||
| -rw-r--r-- | test/kvm-eviction.c | 613 | ||||
| -rw-r--r-- | test/kvm-pagestep.c (renamed from test/execstep.c) | 0 | ||||
| -rw-r--r-- | test/kvm-step.c (renamed from test/fullstep.c) | 99 | ||||
| -rw-r--r-- | test/qemu-aes_guest.c (renamed from test/aes-detect_guest.c) | 4 | ||||
| -rw-r--r-- | test/qemu-aes_host.c (renamed from test/aes-detect_host.c) | 0 | ||||
| -rw-r--r-- | test/qemu-eviction_guest.c (renamed from test/access-detect_guest.c) | 4 | ||||
| -rw-r--r-- | test/qemu-eviction_host.c (renamed from test/access-detect_host.c) | 0 | ||||
| -rw-r--r-- | test/readsvme.c | 26 |
14 files changed, 696 insertions, 206 deletions
diff --git a/test/.gitignore b/test/.gitignore index b434bc4..2549182 100755 --- a/test/.gitignore +++ b/test/.gitignore @@ -1,13 +1,7 @@ -access eviction -kvm -sev -sev-es -sev-snp -fullstep -execstep -aes-detect_guest -aes-detect_host -access-detect_guest -access-detect_host -readsvme +kvm-eviction +kvm-step +kvm-pagestep +qemu-eviction +qemu-aes +qemu-poc diff --git a/test/access.c b/test/access.c deleted file mode 100644 index dc704fb..0000000 --- a/test/access.c +++ /dev/null @@ -1,30 +0,0 @@ -#include "cachepc/uapi.h" - -#include <sys/ioctl.h> -#include <stdlib.h> -#include <stdio.h> -#include <fcntl.h> -#include <stdint.h> -#include <err.h> -#include <fcntl.h> -#include <unistd.h> - -int -main(int argc, const char **argv) -{ - uint32_t arg; - int fd, ret; - size_t i; - - fd = open("/dev/kvm", O_RDONLY); - if (fd < 0) err(1, "open"); - - for (i = 0; i < 100; i++) { - arg = 48; /* target set */ - ret = ioctl(fd, KVM_CPC_TEST_ACCESS, &arg); - if (ret == -1) err(1, "ioctl TEST_ACCESS"); - if (arg != 1) errx(1, "access result (%i) != 1", arg); - } - - close(fd); -} diff --git a/test/aes-detect.c b/test/aes-detect.c deleted file mode 100644 index d95148b..0000000 --- a/test/aes-detect.c +++ /dev/null @@ -1,85 +0,0 @@ -#include "cachepc/uapi.h" - -#include <stdint.h> - -#define ACCESS_LINE(n) \ - asm volatile ("mov (%0), %%rbx" \ - : : "r"(((uint8_t*) L1) + n * L1_LINESIZE) : "rbx"); - -#define DO_ACCESS_PATTERN() \ - ACCESS_LINE(60) \ - ACCESS_LINE(13) \ - ACCESS_LINE(24) \ - ACCESS_LINE(19) \ - ACCESS_LINE(38) \ - ACCESS_LINE(17) \ - ACCESS_LINE( 2) \ - ACCESS_LINE(12) \ - ACCESS_LINE(22) \ - ACCESS_LINE(46) \ - ACCESS_LINE( 4) \ - ACCESS_LINE(61) \ - ACCESS_LINE( 5) \ - ACCESS_LINE(14) \ - ACCESS_LINE(11) \ - ACCESS_LINE(35) \ - ACCESS_LINE(45) \ - ACCESS_LINE(10) \ - ACCESS_LINE(49) \ - ACCESS_LINE(56) \ - ACCESS_LINE(27) \ - ACCESS_LINE(37) \ - ACCESS_LINE(63) \ - ACCESS_LINE(54) \ - ACCESS_LINE(55) \ - ACCESS_LINE(29) \ - ACCESS_LINE(48) \ - ACCESS_LINE( 9) \ - ACCESS_LINE(16) \ - ACCESS_LINE(39) \ - ACCESS_LINE(20) \ - ACCESS_LINE(21) \ - ACCESS_LINE(62) \ - ACCESS_LINE( 0) \ - ACCESS_LINE(34) \ - ACCESS_LINE( 8) \ - ACCESS_LINE(53) \ - ACCESS_LINE(42) \ - ACCESS_LINE(51) \ - ACCESS_LINE(50) \ - ACCESS_LINE(57) \ - ACCESS_LINE( 7) \ - ACCESS_LINE( 6) \ - ACCESS_LINE(33) \ - ACCESS_LINE(26) \ - ACCESS_LINE(40) \ - ACCESS_LINE(58) \ - ACCESS_LINE( 1) \ - ACCESS_LINE(44) \ - ACCESS_LINE(23) \ - ACCESS_LINE(25) \ - ACCESS_LINE(47) \ - ACCESS_LINE(15) \ - ACCESS_LINE(36) \ - ACCESS_LINE( 3) \ - ACCESS_LINE(41) \ - ACCESS_LINE(52) \ - ACCESS_LINE(59) \ - ACCESS_LINE(18) \ - ACCESS_LINE(31) \ - ACCESS_LINE(28) \ - ACCESS_LINE(32) \ - ACCESS_LINE(30) \ - ACCESS_LINE(43) - -/* corresponding physical memory will also be page-aligned, - * in our case PAGE_SIZE is the size of our L1 without associativity */ -#pragma DATA_ALIGN(L1, PAGE_SIZE) -uint8_t L1[L1_SETS * L1_LINESIZE]; - -int sync_access_pattern[] = { - 60, 13, 24, 19, 38, 17, 2, 12, 22, 46, 4, 61, 5, 14, 11, 35, - 45, 10, 49, 56, 27, 37, 63, 54, 55, 29, 48, 9, 16, 39, 20, 21, - 62, 0, 34, 8, 53, 42, 51, 50, 57, 7, 6, 33, 26, 40, 58, 1, - 44, 23, 25, 47, 15, 36, 3, 41, 52, 59, 18, 31, 28, 32, 30, 43 -}; diff --git a/test/aes-detect.h b/test/aes-detect.h deleted file mode 100644 index b747860..0000000 --- a/test/aes-detect.h +++ /dev/null @@ -1,3 +0,0 @@ -#pragma once - -extern int sync_access_pattern[]; diff --git a/test/eviction.c b/test/eviction.c index 1570205..8cb5914 100644 --- a/test/eviction.c +++ b/test/eviction.c @@ -2,31 +2,31 @@ #include <sys/ioctl.h> #include <fcntl.h> -#include <stdint.h> #include <assert.h> #include <unistd.h> #include <err.h> -#include <stdlib.h> +#include <stdint.h> #include <stdio.h> +#include <stdlib.h> int main(int argc, const char **argv) { - cpc_msrmt_t counts[L1_SETS]; - uint32_t arg; + uint8_t counts[L1_SETS]; + uint32_t set; int i, fd, ret; fd = open("/dev/kvm", O_RDONLY); if (fd < 0) err(1, "open"); - arg = 48; - if (argc == 2) arg = atoi(argv[1]); + set = 48; + if (argc > 1) set = atoi(argv[1]); - ret = ioctl(fd, KVM_CPC_TEST_EVICTION, &arg); - if (ret == -1) err(1, "ioctl TEST_EVICTION"); + ret = ioctl(fd, KVM_CPC_TEST_EVICTION, &set); + if (ret == -1) err(1, "ioctl KVM_CPC_TEST_EVICTION"); ret = ioctl(fd, KVM_CPC_READ_COUNTS, counts); - if (ret == -1) err(1, "ioctl READ_COUNTS"); + if (ret == -1) err(1, "ioctl KVM_CPC_READ_COUNTS"); for (i = 0; i < 64; i++) { if (i % 16 == 0 && i) @@ -38,6 +38,6 @@ main(int argc, const char **argv) printf("\x1b[0m"); } printf("\n"); - + close(fd); } diff --git a/test/fulltrack b/test/fulltrack Binary files differdeleted file mode 100755 index 5344b51..0000000 --- a/test/fulltrack +++ /dev/null diff --git a/test/kvm-eviction.c b/test/kvm-eviction.c new file mode 100644 index 0000000..21227cb --- /dev/null +++ b/test/kvm-eviction.c @@ -0,0 +1,613 @@ +#define _GNU_SOURCE + +#include "cachepc/uapi.h" + +#include <linux/psp-sev.h> +#include <linux/kvm.h> +#include <sys/syscall.h> +#include <sys/ioctl.h> +#include <sys/user.h> +#include <sys/wait.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> +#include <signal.h> +#include <dirent.h> +#include <assert.h> +#include <errno.h> +#include <err.h> +#include <fcntl.h> +#include <sched.h> +#include <string.h> +#include <stdbool.h> +#include <stdlib.h> +#include <stdint.h> +#include <stdio.h> +#include <stdarg.h> + +#define ARRLEN(x) (sizeof(x) / sizeof((x)[0])) +#define MIN(a,b) ((a) > (b) ? (b) : (a)) + +#define SAMPLE_COUNT 64 + +#define TARGET_CORE 2 +#define SECONDARY_CORE 3 + +#define TARGET_SET 15 + +enum { + WITH, + WITHOUT +}; + +struct kvm { + int fd, vmfd, vcpufd; + void *mem; + size_t memsize; + struct kvm_run *run; +}; + +/* start and end for guest assembly */ +extern uint8_t __start_guest_with[]; +extern uint8_t __stop_guest_with[]; +extern uint8_t __start_guest_without[]; +extern uint8_t __stop_guest_without[]; + +static const char *vmtype; + +static int kvm_dev, sev_dev; + +enum { + GSTATE_UNINIT, + GSTATE_LUPDATE, + GSTATE_LSECRET, + GSTATE_RUNNING, + GSTATE_SUPDATE, + GSTATE_RUPDATE, + GSTATE_SENT +}; + +const char *sev_fwerr_strs[] = { + "Success", + "Platform state is invalid", + "Guest state is invalid", + "Platform configuration is invalid", + "Buffer too small", + "Platform is already owned", + "Certificate is invalid", + "Policy is not allowed", + "Guest is not active", + "Invalid address", + "Bad signature", + "Bad measurement", + "Asid is already owned", + "Invalid ASID", + "WBINVD is required", + "DF_FLUSH is required", + "Guest handle is invalid", + "Invalid command", + "Guest is active", + "Hardware error", + "Hardware unsafe", + "Feature not supported", + "Invalid parameter", + "Out of resources", + "Integrity checks failed" +}; + +const char *sev_gstate_strs[] = { + "UNINIT", + "LUPDATE", + "LSECRET", + "RUNNING", + "SUPDATE", + "RUPDATE", + "SEND" +}; + +void +hexdump(void *data, int len) +{ + int i; + + for (i = 0; i < len; i++) { + if (i % 16 == 0 && i) + printf("\n"); + printf("%02X ", *(uint8_t *)(data + i)); + } + printf("\n"); +} + +__attribute__((section("guest_with"))) void +vm_guest_with(void) +{ + while (1) { + asm volatile("mov (%[v]), %%bl" + : : [v] "r" (L1_LINESIZE * TARGET_SET)); + CPC_DO_VMMCALL(EXIT, 0, 0); + } +} + +__attribute__((section("guest_without"))) void +vm_guest_without(void) +{ + while (1) { + CPC_DO_VMMCALL(EXIT, 0, 0); + } +} + +bool +pin_process(pid_t pid, int cpu, bool assert) +{ + cpu_set_t cpuset; + int ret; + + CPU_ZERO(&cpuset); + CPU_SET(cpu, &cpuset); + ret = sched_setaffinity(pid, sizeof(cpu_set_t), &cpuset); + if (ret < 0) { + if (assert) err(1, "sched_setaffinity"); + return false; + } + + return true; +} + +int +read_stat_core(pid_t pid) +{ + char path[256]; + char line[2048]; + FILE *file; + char *p; + int i, cpu; + + snprintf(path, sizeof(path), "/proc/%u/stat", pid); + file = fopen(path, "r"); + if (!file) return -1; + + if (!fgets(line, sizeof(line), file)) + err(1, "read stat"); + + p = line; + for (i = 0; i < 38 && (p = strchr(p, ' ')); i++) + p += 1; + + if (!p) errx(1, "stat format"); + cpu = atoi(p); + + fclose(file); + + return cpu; +} + +const char * +sev_fwerr_str(int code) +{ + if (code < 0 || code >= ARRLEN(sev_fwerr_strs)) + return "Unknown error"; + + return sev_fwerr_strs[code]; +} + +const char * +sev_gstate_str(int code) +{ + if (code < 0 || code >= ARRLEN(sev_gstate_strs)) + return "Unknown gstate"; + + return sev_gstate_strs[code]; +} + +int +sev_ioctl(int vmfd, int cmd, void *data, int *error) +{ + struct kvm_sev_cmd input; + int ret; + + memset(&input, 0, sizeof(input)); + input.id = cmd; + input.sev_fd = sev_dev; + input.data = (uintptr_t) data; + + ret = ioctl(vmfd, KVM_MEMORY_ENCRYPT_OP, &input); + if (error) *error = input.error; + + return ret; +} + +void +sev_get_measure(int vmfd) +{ + struct kvm_sev_launch_measure msrmt; + int ret, fwerr; + uint8_t *data; + + memset(&msrmt, 0, sizeof(msrmt)); + ret = sev_ioctl(vmfd, KVM_SEV_LAUNCH_MEASURE, &msrmt, &fwerr); + if (ret < 0 && fwerr != SEV_RET_INVALID_LEN) + errx(1, "KVM_SEV_LAUNCH_MEASURE: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + + data = malloc(msrmt.len); + msrmt.uaddr = (uintptr_t) data; + + ret = sev_ioctl(vmfd, KVM_SEV_LAUNCH_MEASURE, &msrmt, &fwerr); + if (ret < 0) + errx(1, "KVM_SEV_LAUNCH_MEASURE: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + + free(data); +} + +uint8_t +sev_guest_state(int vmfd, uint32_t handle) +{ + struct kvm_sev_guest_status status; + int ret, fwerr; + + status.handle = handle; + ret = sev_ioctl(vmfd, KVM_SEV_GUEST_STATUS, &status, &fwerr); + if (ret < 0) { + errx(1, "KVM_SEV_GUEST_STATUS: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + } + + return status.state; +} + +void +sev_debug_encrypt(int vmfd, void *src, void *dst, size_t size) +{ + struct kvm_sev_dbg enc; + int ret, fwerr; + + enc.src_uaddr = (uintptr_t) src; + enc.dst_uaddr = (uintptr_t) dst; + enc.len = size; + ret = sev_ioctl(vmfd, KVM_SEV_DBG_ENCRYPT, &enc, &fwerr); + if (ret < 0) errx(1, "KVM_SEV_DBG_ENCRYPT: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); +} + +void +sev_debug_decrypt(int vmfd, void *src, void *dst, size_t size) +{ + struct kvm_sev_dbg enc; + int ret, fwerr; + + enc.src_uaddr = (uintptr_t) src; + enc.dst_uaddr = (uintptr_t) dst; + enc.len = size; + ret = sev_ioctl(vmfd, KVM_SEV_DBG_DECRYPT, &enc, &fwerr); + if (ret < 0) errx(1, "KVM_SEV_DBG_DECRYPT: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); +} + +void +kvm_init(struct kvm *kvm, size_t ramsize, + void *code_start, void *code_stop) +{ + struct kvm_userspace_memory_region region; + struct kvm_regs regs; + struct kvm_sregs sregs; + int ret; + + /* Create a kvm instance */ + kvm->vmfd = ioctl(kvm_dev, KVM_CREATE_VM, 0); + if (kvm->vmfd < 0) err(1, "KVM_CREATE_VM"); + + /* Allocate guest memory */ + kvm->memsize = ramsize; + kvm->mem = mmap(NULL, kvm->memsize, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, -1, 0); + if (!kvm->mem) err(1, "Allocating guest memory"); + assert(code_stop - code_start <= kvm->memsize); + memcpy(kvm->mem, code_start, code_stop - code_start); + + /* Map it into the vm */ + memset(®ion, 0, sizeof(region)); + region.slot = 0; + region.memory_size = kvm->memsize; + region.guest_phys_addr = 0x0000; + region.userspace_addr = (uintptr_t) kvm->mem; + ret = ioctl(kvm->vmfd, KVM_SET_USER_MEMORY_REGION, ®ion); + if (ret < 0) err(1, "KVM_SET_USER_MEMORY_REGION"); + + /* Create virtual cpu core */ + kvm->vcpufd = ioctl(kvm->vmfd, KVM_CREATE_VCPU, 0); + if (kvm->vcpufd < 0) err(1, "KVM_CREATE_VCPU"); + + /* Initialize segment regs */ + memset(&sregs, 0, sizeof(sregs)); + ret = ioctl(kvm->vcpufd, KVM_GET_SREGS, &sregs); + if (ret < 0) err(1, "KVM_GET_SREGS"); + sregs.cs.base = 0; + sregs.cs.selector = 0; + ret = ioctl(kvm->vcpufd, KVM_SET_SREGS, &sregs); + if (ret < 0) err(1, "KVM_SET_SREGS"); + + /* Initialize rest of registers */ + memset(®s, 0, sizeof(regs)); + regs.rip = 0x0; + regs.rsp = kvm->memsize - 8; + regs.rbp = kvm->memsize - 8; + regs.rax = 0; + regs.rdx = 0; + regs.rflags = 0x2; + ret = ioctl(kvm->vcpufd, KVM_SET_REGS, ®s); + if (ret < 0) err(1, "KVM_SET_REGS"); +} + +void +sev_kvm_init(struct kvm *kvm, size_t ramsize, + void *code_start, void *code_stop) +{ + struct kvm_userspace_memory_region region; + struct kvm_sev_launch_update_data update; + struct kvm_sev_launch_start start; + struct kvm_regs regs; + struct kvm_sregs sregs; + int ret, fwerr; + + /* Create a kvm instance */ + kvm->vmfd = ioctl(kvm_dev, KVM_CREATE_VM, 0); + if (kvm->vmfd < 0) err(1, "KVM_CREATE_VM"); + + /* Allocate guest memory */ + kvm->memsize = ramsize; + kvm->mem = mmap(NULL, kvm->memsize, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, -1, 0); + if (!kvm->mem) err(1, "Allocating guest memory"); + assert(code_stop - code_start <= kvm->memsize); + memcpy(kvm->mem, code_start, code_stop - code_start); + + /* Map it into the vm */ + memset(®ion, 0, sizeof(region)); + region.slot = 0; + region.memory_size = kvm->memsize; + region.guest_phys_addr = 0x0000; + region.userspace_addr = (uintptr_t) kvm->mem; + ret = ioctl(kvm->vmfd, KVM_SET_USER_MEMORY_REGION, ®ion); + if (ret < 0) err(1, "KVM_SET_USER_MEMORY_REGION"); + + /* Enable SEV for vm */ + ret = sev_ioctl(kvm->vmfd, KVM_SEV_INIT, NULL, &fwerr); + if (ret < 0) errx(1, "KVM_SEV_INIT: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + + /* Generate encryption keys and set policy */ + memset(&start, 0, sizeof(start)); + start.handle = 0; + start.policy = 0; + ret = sev_ioctl(kvm->vmfd, KVM_SEV_LAUNCH_START, &start, &fwerr); + if (ret < 0) errx(1, "KVM_SEV_LAUNCH_START: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + + /* Prepare the vm memory (by encrypting it) */ + memset(&update, 0, sizeof(update)); + update.uaddr = (uintptr_t) kvm->mem; + update.len = ramsize; + ret = sev_ioctl(kvm->vmfd, KVM_SEV_LAUNCH_UPDATE_DATA, &update, &fwerr); + if (ret < 0) errx(1, "KVM_SEV_LAUNCH_UPDATE_DATA: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + + /* Collect a measurement (necessary) */ + sev_get_measure(kvm->vmfd); + + /* Finalize launch process */ + ret = sev_ioctl(kvm->vmfd, KVM_SEV_LAUNCH_FINISH, 0, &fwerr); + if (ret < 0) errx(1, "KVM_SEV_LAUNCH_FINISH: (%s) %s", + strerror(errno), sev_fwerr_str(fwerr)); + ret = sev_guest_state(kvm->vmfd, start.handle); + if (ret != GSTATE_RUNNING) + errx(1, "Bad guest state: %s", sev_gstate_str(fwerr)); + + /* Create virtual cpu core */ + kvm->vcpufd = ioctl(kvm->vmfd, KVM_CREATE_VCPU, 0); + if (kvm->vcpufd < 0) err(1, "KVM_CREATE_VCPU"); + + /* Map the shared kvm_run structure and following data */ + ret = ioctl(kvm_dev, KVM_GET_VCPU_MMAP_SIZE, NULL); + if (ret < 0) err(1, "KVM_GET_VCPU_MMAP_SIZE"); + if (ret < sizeof(struct kvm_run)) + errx(1, "KVM_GET_VCPU_MMAP_SIZE too small"); + kvm->run = mmap(NULL, ret, PROT_READ | PROT_WRITE, + MAP_SHARED, kvm->vcpufd, 0); + if (!kvm->run) err(1, "mmap vcpu"); + + /* Initialize segment regs */ + memset(&sregs, 0, sizeof(sregs)); + ret = ioctl(kvm->vcpufd, KVM_GET_SREGS, &sregs); + if (ret < 0) err(1, "KVM_GET_SREGS"); + sregs.cs.base = 0; + sregs.cs.selector = 0; + ret = ioctl(kvm->vcpufd, KVM_SET_SREGS, &sregs); + if (ret < 0) err(1, "KVM_SET_SREGS"); + + /* Initialize rest of registers */ + memset(®s, 0, sizeof(regs)); + regs.rip = 0x0; + regs.rsp = kvm->memsize - 8; + regs.rbp = kvm->memsize - 8; + regs.rax = 0; + regs.rdx = 0; + regs.rflags = 0x2; + ret = ioctl(kvm->vcpufd, KVM_SET_REGS, ®s); + if (ret < 0) err(1, "KVM_SET_REGS"); +} + +void +sev_es_kvm_init(struct kvm *kvm, size_t ramsize, + void *code_start, void *code_stop) +{ + errx(1, "Not implemented"); +} + +void +sev_snp_kvm_init(struct kvm *kvm, size_t ramsize, + void *code_start, void *code_stop) +{ + errx(1, "Not implemented"); +} + +void +vm_init(struct kvm *kvm, size_t ramsize, void *code_start, void *code_end) +{ + if (!strcmp(vmtype, "kvm")) { + kvm_init(kvm, ramsize, code_start, code_end); + } else if (!strcmp(vmtype, "sev")) { + sev_kvm_init(kvm, ramsize, code_start, code_end); + } else if (!strcmp(vmtype, "sev-es")) { + sev_es_kvm_init(kvm, ramsize, code_start, code_end); + } else if (!strcmp(vmtype, "sev-snp")) { + sev_snp_kvm_init(kvm, ramsize, code_start, code_end); + } else { + errx(1, "invalid version"); + } +} + +void +vm_deinit(struct kvm *kvm) +{ + close(kvm->vmfd); + close(kvm->vcpufd); + munmap(kvm->mem, kvm->memsize); +} + +void +print_counts(uint8_t *counts) +{ + int i; + + for (i = 0; i < 64; i++) { + if (i % 16 == 0 && i) + printf("\n"); + if (counts[i] == 1) + printf("\x1b[38;5;88m"); + else if (counts[i] > 1) + printf("\x1b[38;5;196m"); + printf("%2i ", i); + if (counts[i] > 0) + printf("\x1b[0m"); + } + + printf("\nTarget Set %i Count: %u\n\n", + TARGET_SET, counts[TARGET_SET]); +} + +void +collect(struct kvm *kvm, uint8_t *counts) +{ + struct kvm_regs regs; + int ret; + + /* run vm twice, use count without initial stack setup */ + ret = ioctl(kvm->vcpufd, KVM_RUN, NULL); + if (ret < 0) err(1, "KVM_RUN"); + + if (kvm->run->exit_reason == KVM_EXIT_MMIO) { + memset(®s, 0, sizeof(regs)); + ret = ioctl(kvm->vcpufd, KVM_GET_REGS, ®s); + if (ret < 0) err(1, "KVM_GET_REGS"); + errx(1, "Victim access OOB: %llu %08llx => %02X\n", + kvm->run->mmio.phys_addr, regs.rip, + ((uint8_t *)kvm->mem)[regs.rip]); + } else if (kvm->run->exit_reason != KVM_EXIT_IO) { + errx(1, "KVM died: %i\n", kvm->run->exit_reason); + } + + ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts); + if (ret == -1) err(1, "ioctl KVM_CPC_READ_COUNTS"); +} + +int +main(int argc, const char **argv) +{ + struct kvm vms[2]; + uint8_t counts[2][SAMPLE_COUNT][64]; + uint8_t baseline[64]; + uint32_t calc; + int i, k, ret; + + vmtype = "kvm"; + if (argc > 1) vmtype = argv[1]; + if (strcmp(vmtype, "kvm") && strcmp(vmtype, "sev") + && strcmp(vmtype, "sev-es") + && strcmp(vmtype, "sev-snp")) + errx(1, "invalid version: %s", vmtype); + + setvbuf(stdout, NULL, _IONBF, 0); + + pin_process(0, TARGET_CORE, true); + + kvm_dev = open("/dev/kvm", O_RDWR | O_CLOEXEC); + if (kvm_dev < 0) err(1, "open /dev/kvm"); + + sev_dev = open("/dev/sev", O_RDWR | O_CLOEXEC); + if (sev_dev < 0) err(1, "open /dev/sev"); + + /* Make sure we have the stable version of the API */ + ret = ioctl(kvm_dev, KVM_GET_API_VERSION, NULL); + if (ret < 0) err(1, "KVM_GET_API_VERSION"); + if (ret != 12) errx(1, "KVM_GET_API_VERSION %d, expected 12", ret); + + /* Reset kernel module state */ + ret = ioctl(kvm_dev, KVM_CPC_RESET); + if (ret < 0) err(1, "ioctl KVM_CPC_RESET"); + + vm_init(&vms[WITH], 64 * 64 * 8 * 2, + __start_guest_with, __stop_guest_with); + vm_init(&vms[WITHOUT], 64 * 64 * 8 * 2, + __start_guest_without, __stop_guest_without); + + calc = true; + ret = ioctl(kvm_dev, KVM_CPC_CALC_BASELINE, &calc); + if (ret == -1) err(1, "ioctl KVM_CPC_CALC_BASELINE"); + + for (i = 0; i < SAMPLE_COUNT; i++) { + collect(&vms[WITH], counts[WITH][i]); + collect(&vms[WITHOUT], counts[WITHOUT][i]); + } + + calc = false; + ret = ioctl(kvm_dev, KVM_CPC_CALC_BASELINE, &calc); + if (ret == -1) err(1, "ioctl KVM_CPC_CALC_BASELINE"); + + ret = ioctl(kvm_dev, KVM_CPC_READ_BASELINE, baseline); + if (ret == -1) err(1, "ioctl KVM_CPC_READ_BASELINE"); + + for (i = 0; i < SAMPLE_COUNT; i++) { + printf("Evictions with access:\n"); + print_counts(counts[WITH][i]); + + printf("Evictions without access:\n"); + print_counts(counts[WITHOUT][i]); + + for (k = 0; k < 64; k++) { + if (counts[WITH][i][k] >= 8) + warnx("with: Count OOB (%i, %i)", i, k); + if (baseline[k] > counts[WITH][i][k]) + warnx("with: Baseline oob (%i, %i)", i, k); + counts[WITH][i][k] -= baseline[k]; + + if (counts[WITHOUT][i][k] >= 8) + warnx("without: Count OOB (%i, %i)", i, k); + if (baseline[k] > counts[WITHOUT][i][k]) + warnx("without: Baseline OOB (%i, %i)", i, k); + counts[WITHOUT][i][k] -= baseline[k]; + } + + if (!counts[WITH][i][TARGET_SET]) + warnx("with: Missing eviction in target set"); + } + + vm_deinit(&vms[WITH]); + vm_deinit(&vms[WITHOUT]); + + close(kvm_dev); + close(sev_dev); +} + diff --git a/test/execstep.c b/test/kvm-pagestep.c index 14f8d42..14f8d42 100644 --- a/test/execstep.c +++ b/test/kvm-pagestep.c diff --git a/test/fullstep.c b/test/kvm-step.c index 52e745a..14f8d42 100644 --- a/test/fullstep.c +++ b/test/kvm-step.c @@ -81,7 +81,9 @@ const char *sev_fwerr_strs[] = { [0x15] = "Feature not supported", [0x16] = "Invalid parameter", [0x17] = "Out of resources", - [0x18] = "Integrity checks failed" + [0x18] = "Integrity checks failed", + [0x19] = "RMP page size is incorrect", + [0x1A] = "RMP page state is incorrect", }; const char *sev_gstate_strs[] = { @@ -106,13 +108,9 @@ hexdump(void *data, int len) __attribute__((section("guest_with"))) void vm_guest_with(void) { - while (1) { - asm volatile("mov (%0), %%eax" : : - "r" (L1_LINESIZE * (L1_SETS * 3 + TARGET_SET)) : "rax"); - asm volatile("nop"); - asm volatile("mov (%0), %%eax" : : - "r" (L1_LINESIZE * (L1_SETS * 3 + TARGET_SET)) : "rax"); - } + asm volatile ("mov %rbp, %rsp; pop %rbp; \ + movq $4096, %rcx; movq $0, %rdx; cmp %rcx, %rdx; \ + cmovne %rdx, %rcx; jmp *%rcx"); } bool @@ -163,8 +161,10 @@ read_stat_core(pid_t pid) const char * sev_fwerr_str(int code) { - if (code < 0 || code >= ARRLEN(sev_fwerr_strs)) + if (code < 0 || code >= ARRLEN(sev_fwerr_strs)) { + warnx("Unknown firmware error %i", code); return "Unknown error"; + } return sev_fwerr_strs[code]; } @@ -172,8 +172,10 @@ sev_fwerr_str(int code) const char * sev_gstate_str(int code) { - if (code < 0 || code >= ARRLEN(sev_gstate_strs)) + if (code < 0 || code >= ARRLEN(sev_gstate_strs)) { + warnx("Unknown guest state %i", code); return "Unknown gstate"; + } return sev_gstate_strs[code]; } @@ -210,6 +212,7 @@ snp_guest_state(int vmfd) return status.state; } + void snp_dbg_encrypt(int vmfd, void *dst, void *src, size_t size) { @@ -247,7 +250,7 @@ snp_dbg_decrypt(int vmfd, void *dst, void *src, size_t size) } uint64_t -snp_dbg_rip(int vmfd) +snp_dbg_decrypt_rip(int vmfd) { uint8_t vmsa[PAGE_SIZE]; uint64_t rip; @@ -284,7 +287,12 @@ snp_kvm_init(struct kvm *kvm, size_t ramsize, void *code_start, void *code_stop) MAP_SHARED | MAP_ANONYMOUS, -1, 0); if (!kvm->mem) err(1, "Allocating guest memory"); assert(code_stop - code_start <= kvm->memsize); - memcpy(kvm->mem, code_start, code_stop - code_start); + + /* Fill memory with nops and put jump code a bit from start + * such that we access multiple different pages while running */ + memset(kvm->mem, 0x90, kvm->memsize); + memcpy(kvm->mem + L1_SIZE, // - (code_stop - code_start), + code_start, code_stop - code_start); /* Map it into the vm */ memset(®ion, 0, sizeof(region)); @@ -382,7 +390,7 @@ read_counts() if (!counts) err(1, "malloc"); ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts); - if (ret == -1) err(1, "ioctl READ_COUNTS"); + if (ret) err(1, "ioctl READ_COUNTS"); for (i = 0; i < L1_SETS; i++) { if (counts[i] > 8) @@ -444,7 +452,6 @@ monitor(struct kvm *kvm, bool baseline) { struct cpc_event event; cpc_msrmt_t counts[64]; - uint64_t rip; int ret, i; /* Get page fault info */ @@ -452,36 +459,43 @@ monitor(struct kvm *kvm, bool baseline) if (ret) { if (errno == EAGAIN) return 0; - perror("ioctl POLL_EVENT"); + warn("ioctl POLL_EVENT"); return 1; } if (event.type == CPC_EVENT_TRACK_STEP) { ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts); - if (ret == -1) err(1, "ioctl READ_COUNTS"); + if (ret) err(1, "ioctl READ_COUNTS"); if (!baseline) { - rip = snp_dbg_rip(kvm->vmfd); - printf("Event: cnt:%llu inst:%llu data:%llu retired:%llu rip:%lu\n", + printf("Event: cnt:%llu rip:%lu, inst:%llu data:%llu retired:%llu\n", event.step.fault_count, + 0, // snp_dbg_decrypt_rip(kvm->vmfd), event.step.fault_gfns[0], event.step.fault_gfns[1], - event.step.retinst, rip); + event.step.retinst); print_counts(counts); printf("\n"); } - faultcnt++; for (i = 0; i < 64; i++) { if (counts[i] > 8) { - errx(1, "Invalid count for set %i (%llu)", + warnx("Invalid count for set %i (%llu)", i, counts[i]); } } + + if (baseline) faultcnt++; + } else if (event.type == CPC_EVENT_TRACK_PAGE) { + printf("Event: inst page from:%llu to:%llu rip:%lu\n\n", + event.page.inst_gfn_prev, event.page.inst_gfn, + 0); //snp_dbg_decrypt_rip(kvm->vmfd)); + + if (!baseline) faultcnt++; } ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id); - if (ret == -1) err(1, "ioctl ACK_EVENT"); + if (ret) err(1, "ioctl ACK_EVENT"); return 0; } @@ -522,27 +536,29 @@ main(int argc, const char **argv) /* Page tracking init needs to happen after kvm * init so main_kvm is set.. */ + /* Reset previous tracking */ ret = ioctl(kvm_dev, KVM_CPC_RESET_TRACKING, NULL); - if (ret == -1) err(1, "ioctl RESET_TRACKING"); + if (ret) err(1, "ioctl RESET_TRACKING"); - arg = CPC_TRACK_FULL; + /* Do data access stepping */ + arg = CPC_TRACK_STUB; ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &arg); - if (ret == -1) err(1, "ioctl TRACK_MODE"); + if (ret) err(1, "ioctl TRACK_MODE"); /* Init page tracking */ - track_mode = KVM_PAGE_TRACK_ACCESS; + track_mode = KVM_PAGE_TRACK_EXEC; ret = ioctl(kvm_dev, KVM_CPC_TRACK_ALL, &track_mode); - if (ret == -1) err(1, "ioctl TRACK_ALL"); + if (ret) err(1, "ioctl TRACK_ALL"); arg = true; ret = ioctl(kvm_dev, KVM_CPC_MEASURE_BASELINE, &arg); - if (ret == -1) err(1, "ioctl MEASURE_BASELINE"); + if (ret) err(1, "ioctl MEASURE_BASELINE"); ppid = getpid(); if ((pid = fork())) { if (pid < 0) err(1, "fork"); - sleep(1); /* wait for child to pin other core */ + sleep(1); /* give time for child to pin other core */ printf("VMRUN\n"); runonce(&kvm_with_access); @@ -558,16 +574,16 @@ main(int argc, const char **argv) do { ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event); - if (ret == -1 && errno != EAGAIN) + if (ret && errno != EAGAIN) err(1, "ioctl POLL_EVENT"); - } while (ret == -1 && errno == EAGAIN); + } while (ret && errno == EAGAIN); arg = false; ret = ioctl(kvm_dev, KVM_CPC_MEASURE_BASELINE, &arg); - if (ret == -1) err(1, "ioctl MEASURE_BASELINE"); + if (ret) err(1, "ioctl MEASURE_BASELINE"); ret = ioctl(kvm_dev, KVM_CPC_READ_BASELINE, baseline); - if (ret == -1) err(1, "ioctl READ_BASELINE"); + if (ret) err(1, "ioctl READ_BASELINE"); printf("\n>>> BASELINE:\n"); print_counts(baseline); @@ -578,15 +594,26 @@ main(int argc, const char **argv) /* Check baseline for saturated sets */ for (i = 0; i < 64; i++) { if (baseline[i] >= 8) - errx(1, "!!! Baseline set %i full\n", i); + warnx("!!! Baseline set %i full\n", i); } arg = true; ret = ioctl(kvm_dev, KVM_CPC_SUB_BASELINE, &arg); - if (ret == -1) err(1, "ioctl SUB_BASELINE"); + if (ret) err(1, "ioctl SUB_BASELINE"); + + ret = ioctl(kvm_dev, KVM_CPC_RESET_TRACKING, NULL); + if (ret) err(1, "ioctl RESET_TRACKING"); + + arg = CPC_TRACK_EXEC; + ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &arg); + if (ret) err(1, "ioctl TRACK_MODE"); + + track_mode = KVM_PAGE_TRACK_EXEC; + ret = ioctl(kvm_dev, KVM_CPC_TRACK_ALL, &track_mode); + if (ret) err(1, "ioctl TRACK_ALL"); ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id); - if (ret == -1) err(1, "ioctl ACK_EVENT"); + if (ret) err(1, "ioctl ACK_EVENT"); faultcnt = 0; while (faultcnt < 20) { diff --git a/test/aes-detect_guest.c b/test/qemu-aes_guest.c index 2b0f2ad..949c661 100644 --- a/test/aes-detect_guest.c +++ b/test/qemu-aes_guest.c @@ -11,8 +11,6 @@ #include <stdint.h> #include <stdlib.h> -// #include "aes-detect.c" - static uint8_t key[16]; void @@ -62,8 +60,6 @@ main(int argc, const char **argv) memset(block, 0, sizeof(block)); strncpy((char *) block, "Hello world", sizeof(block)); - // DO_ACCESS_PATTERN(); - printhex(block, sizeof(block)); n = kcapi_cipher_encrypt(kcapi, block, sizeof(block), NULL, block, sizeof(block), KCAPI_ACCESS_HEURISTIC); diff --git a/test/aes-detect_host.c b/test/qemu-aes_host.c index 0e6dff6..0e6dff6 100644 --- a/test/aes-detect_host.c +++ b/test/qemu-aes_host.c diff --git a/test/access-detect_guest.c b/test/qemu-eviction_guest.c index a54e753..0cb5cab 100644 --- a/test/access-detect_guest.c +++ b/test/qemu-eviction_guest.c @@ -1,5 +1,7 @@ #include "cachepc/uapi.h" +#include <sys/time.h> +#include <sys/resource.h> #include <err.h> #include <unistd.h> #include <stdint.h> @@ -17,6 +19,8 @@ main(int argc, const char **argv) err(1, "memalign"); memset(buf, 0, L1_LINESIZE * L1_SETS); + setpriority(PRIO_PROCESS, 0, -20); + while (1) { printf("LOOP\n"); CPC_DO_VMMCALL(CPC_GUEST_START_TRACK, 0); diff --git a/test/access-detect_host.c b/test/qemu-eviction_host.c index 87a5edd..87a5edd 100644 --- a/test/access-detect_host.c +++ b/test/qemu-eviction_host.c diff --git a/test/readsvme.c b/test/readsvme.c deleted file mode 100644 index 4386e89..0000000 --- a/test/readsvme.c +++ /dev/null @@ -1,26 +0,0 @@ -#include "cachepc/uapi.h" - -#include <sys/ioctl.h> -#include <err.h> -#include <fcntl.h> -#include <unistd.h> -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> - -int -main(int argc, const char **argv) -{ - uint32_t svme; - int kvm_fd; - - kvm_fd = open("/dev/kvm", O_RDWR); - if (kvm_fd < 0) err(1, "open /dev/kvm"); - - if (ioctl(kvm_fd, KVM_CPC_SVME_READ, &svme)) - err(1, "ioctl SVME_READ"); - - printf("%u\n", svme); - - close(kvm_fd); -} |