mirror of
https://chromium.googlesource.com/crosvm/crosvm
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1dab58a2cf
This search/replace updates all copyright notices to drop the "All rights reserved", Use "ChromiumOS" instead of "Chromium OS" and drops the trailing dots. This fulfills the request from legal and unifies our notices. ./tools/health-check has been updated to only accept this style. BUG=b:246579983 TEST=./tools/health-check Change-Id: I87a80701dc651f1baf4820e5cc42469d7c5f5bf7 Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3894243 Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> Commit-Queue: Dennis Kempin <denniskempin@google.com>
180 lines
4.9 KiB
C
180 lines
4.9 KiB
C
/*
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* Copyright 2017 The ChromiumOS Authors
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/memfd.h>
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#include <pthread.h>
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#include <stdint.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/mman.h>
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#include <sys/syscall.h>
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#include <time.h>
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#include <unistd.h>
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#include "crosvm.h"
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#ifndef F_LINUX_SPECIFIC_BASE
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#define F_LINUX_SPECIFIC_BASE 1024
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#endif
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#ifndef F_ADD_SEALS
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#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
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#endif
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#ifndef F_SEAL_SHRINK
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#define F_SEAL_SHRINK 0x0002
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#endif
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#define LOAD_ADDRESS 0x1000
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#define SI_ADDRESS 0x8000
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#define BL_VALUE 0x12
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#define KILL_ADDRESS 0x9000
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int g_kill_evt;
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void *vcpu_thread(void *arg) {
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struct crosvm_vcpu *vcpu = arg;
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struct crosvm_vcpu_event evt;
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int i = 0;
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while (crosvm_vcpu_wait(vcpu, &evt) == 0) {
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if (evt.kind == CROSVM_VCPU_EVENT_KIND_INIT) {
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struct kvm_sregs sregs;
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crosvm_vcpu_get_sregs(vcpu, &sregs);
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sregs.cs.base = 0;
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sregs.cs.selector = 0;
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sregs.es.base = KILL_ADDRESS;
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sregs.es.selector = 0;
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crosvm_vcpu_set_sregs(vcpu, &sregs);
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struct kvm_regs regs;
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crosvm_vcpu_get_regs(vcpu, ®s);
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regs.rflags = 2;
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regs.rip = LOAD_ADDRESS;
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regs.rbx = BL_VALUE;
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regs.rsi = SI_ADDRESS;
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crosvm_vcpu_set_regs(vcpu, ®s);
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}
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if (evt.kind == CROSVM_VCPU_EVENT_KIND_IO_ACCESS &&
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evt.io_access.address_space == CROSVM_ADDRESS_SPACE_MMIO &&
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evt.io_access.address == KILL_ADDRESS &&
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evt.io_access.is_write &&
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evt.io_access.length == 1 &&
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evt.io_access.data[0] == 1)
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{
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uint64_t dummy = 1;
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write(g_kill_evt, &dummy, sizeof(dummy));
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return NULL;
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}
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crosvm_vcpu_resume(vcpu);
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}
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return NULL;
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}
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int main(int argc, char** argv) {
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const uint8_t code[] = {
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/*
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0000 881C mov [si],bl
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0014 26C606000001 mov byte [es:0x0],0x1
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0002 F4 hlt
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*/
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0x88, 0x1c, 0x26, 0xc6, 0x06, 0x00, 0x00, 0x01, 0xf4
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};
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struct crosvm *crosvm;
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int ret = crosvm_connect(&crosvm);
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if (ret) {
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fprintf(stderr, "failed to connect to crosvm: %d\n", ret);
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return 1;
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}
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g_kill_evt = crosvm_get_shutdown_eventfd(crosvm);
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if (g_kill_evt < 0) {
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fprintf(stderr, "failed to get kill eventfd: %d\n", g_kill_evt);
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return 1;
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}
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ret = crosvm_reserve_range(crosvm, CROSVM_ADDRESS_SPACE_MMIO, KILL_ADDRESS, 1);
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if (ret) {
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fprintf(stderr, "failed to reserve mmio range: %d\n", ret);
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return 1;
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}
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int mem_size = 0x9000;
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int mem_fd = syscall(SYS_memfd_create, "guest_mem", MFD_CLOEXEC | MFD_ALLOW_SEALING);
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if (mem_fd < 0) {
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fprintf(stderr, "failed to create guest memfd: %d\n", errno);
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return 1;
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}
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ret = ftruncate(mem_fd, mem_size);
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if (ret) {
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fprintf(stderr, "failed to set size of guest memory: %d\n", errno);
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return 1;
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}
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uint8_t *mem = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, mem_fd, 0);
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if (mem == MAP_FAILED) {
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fprintf(stderr, "failed to mmap guest memory: %d\n", errno);
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return 1;
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}
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fcntl(mem_fd, F_ADD_SEALS, F_SEAL_SHRINK);
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memcpy(mem + LOAD_ADDRESS, code, sizeof(code));
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struct crosvm_memory *mem_obj;
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ret = crosvm_create_memory(crosvm, mem_fd, 0, mem_size, 0, false, true, &mem_obj);
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if (ret) {
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fprintf(stderr, "failed to create memory in crosvm: %d\n", ret);
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return 1;
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}
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struct crosvm_vcpu *vcpus[32];
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pthread_t vcpu_threads[32];
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uint32_t vcpu_count;
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for (vcpu_count = 0; vcpu_count < 32; vcpu_count++) {
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ret = crosvm_get_vcpu(crosvm, vcpu_count, &vcpus[vcpu_count]);
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if (ret == -ENOENT)
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break;
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if (ret) {
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fprintf(stderr, "error while getting all vcpus: %d\n", ret);
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return 1;
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}
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pthread_create(&vcpu_threads[vcpu_count], NULL, vcpu_thread, vcpus[vcpu_count]);
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}
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ret = crosvm_start(crosvm);
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if (ret) {
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fprintf(stderr, "failed to tell crosvm to start: %d\n", ret);
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return 1;
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}
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uint64_t dummy;
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read(g_kill_evt, &dummy, 8);
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uint8_t dirty_log[2] = {0};
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ret = crosvm_memory_get_dirty_log(crosvm, mem_obj, dirty_log);
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if (ret) {
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fprintf(stderr, "failed to get dirty log: %d\n", ret);
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return 1;
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}
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if (dirty_log[1] != 0x1) {
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fprintf(stderr, "dirty log does not have expected bits: %x\n", dirty_log[1]);
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return 1;
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}
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uint64_t val = *(uint64_t*)(&mem[SI_ADDRESS]);
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if (val != BL_VALUE) {
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fprintf(stderr, "memory does not have expected value %d\n", val);
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return 1;
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}
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return 0;
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}
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