mirror of
https://chromium.googlesource.com/crosvm/crosvm
synced 2024-11-25 05:03:05 +00:00
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>
313 lines
9.4 KiB
C
313 lines
9.4 KiB
C
/*
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* Copyright 2019 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 <signal.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 KILL_ADDRESS 0x3f9
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#define HINT_ADDRESS 0x500
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#define EAX_HINT_VALUE 0x77
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int g_kill_evt;
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int got_regs = 0;
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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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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.rip = 0x1000;
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regs.rax = 2;
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regs.rbx = 7;
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regs.rflags = 2;
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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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if (evt.io_access.address_space == CROSVM_ADDRESS_SPACE_IOPORT &&
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evt.io_access.address == HINT_ADDRESS &&
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evt.io_access.is_write &&
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evt.io_access.length == 1) {
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struct kvm_regs regs = {0};
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struct kvm_sregs sregs = {0};
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struct kvm_debugregs debugregs = {0};
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/*
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* In a properly running test the following
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* get and set calls will return success despite
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* crosvm being halted.
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*/
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if (kill(getppid(), SIGSTOP)) {
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fprintf(stderr, "failed to send stop to crosvm\n");
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exit(1);
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}
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printf("get regs query on crosvm\n");
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if (crosvm_vcpu_get_regs(vcpu, ®s)) {
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/*
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* The failure mode for this test is that crosvm remains
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* halted (since the plugin hasn't returned from
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* crosvm_vcpu_[g|s]et_regs() to resume crosvm) and
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* the test times out.
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*/
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fprintf(stderr, "failed to query regs on hint port\n");
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exit(1);
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}
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printf("set regs query on crosvm\n");
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if (crosvm_vcpu_set_regs(vcpu, ®s)) {
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fprintf(stderr, "failed to set regs on hint port\n");
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exit(1);
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}
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printf("get sregs query on crosvm\n");
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if (crosvm_vcpu_get_sregs(vcpu, &sregs)) {
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fprintf(stderr, "failed to query sregs on hint port\n");
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exit(1);
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}
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printf("set sregs query on crosvm\n");
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if (crosvm_vcpu_set_sregs(vcpu, &sregs)) {
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fprintf(stderr, "failed to set sregs on hint port\n");
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exit(1);
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}
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printf("get debugregs query on crosvm\n");
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if (crosvm_vcpu_get_debugregs(vcpu, &debugregs)) {
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fprintf(stderr, "failed to query debugregs on hint port\n");
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exit(1);
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}
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printf("set debugregs query on crosvm\n");
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if (crosvm_vcpu_set_debugregs(vcpu, &debugregs)) {
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fprintf(stderr, "failed to set debugregs on hint port\n");
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exit(1);
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}
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got_regs = 1;
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if (kill(getppid(), SIGCONT)) {
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fprintf(stderr, "failed to send continue to crosvm\n");
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exit(1);
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}
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}
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if (evt.io_access.address_space == CROSVM_ADDRESS_SPACE_IOPORT &&
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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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}
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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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B007 mov al,0x7
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BA0005 mov dx,0x500
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EE out dx,al
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BAF903 mov dx,0x3f9
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B001 mov al,0x1
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EE out dx,al
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F4 hlt
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*/
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0xb0, EAX_HINT_VALUE,
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0xba, (HINT_ADDRESS & 0xFF), ((HINT_ADDRESS >> 8) & 0xFF),
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0xee,
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0xba, (KILL_ADDRESS & 0xFF), ((KILL_ADDRESS >> 8) & 0xFF),
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0xb0, 0x01,
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0xee,
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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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/*
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* Not strictly necessary, but demonstrates we can have as many connections
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* as we please.
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*/
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struct crosvm *extra_crosvm;
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ret = crosvm_new_connection(crosvm, &extra_crosvm);
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if (ret) {
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fprintf(stderr, "failed to make new socket: %d\n", ret);
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return 1;
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}
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/* We needs this eventfd to know when to exit before being killed. */
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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_IOPORT,
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HINT_ADDRESS, 1);
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if (ret) {
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fprintf(stderr, "failed to reserve hint ioport range: %d\n", ret);
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return 1;
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}
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ret = crosvm_reserve_range(crosvm, CROSVM_ADDRESS_SPACE_IOPORT,
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KILL_ADDRESS, 1);
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if (ret) {
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fprintf(stderr, "failed to reserve kill ioport range: %d\n", ret);
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return 1;
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}
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struct crosvm_hint_detail details = {0};
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details.match_rax = 1;
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details.rax = EAX_HINT_VALUE;
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details.send_sregs = 1;
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details.send_debugregs = 1;
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struct crosvm_hint hint = {0};
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hint.address_space = CROSVM_ADDRESS_SPACE_IOPORT;
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hint.address = HINT_ADDRESS;
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hint.address_flags = CROSVM_HINT_ON_WRITE;
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hint.details_count = 1;
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hint.details = &details;
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ret = crosvm_set_hypercall_hint(crosvm, 1, &hint);
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if (ret) {
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fprintf(stderr, "failed to set hypercall hint: %d\n", ret);
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return 1;
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}
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int mem_size = 0x2000;
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int mem_fd = syscall(SYS_memfd_create, "guest_mem",
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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,
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mem_fd, 0x1000);
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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, code, sizeof(code));
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struct crosvm_memory *mem_obj;
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ret = crosvm_create_memory(crosvm, mem_fd, 0x1000, 0x1000, 0x1000, false,
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false, &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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/* get and creat a thread for each vcpu */
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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,
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vcpus[vcpu_count]);
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}
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ret = crosvm_start(extra_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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/* Wait for crosvm to request that we exit otherwise we will be killed. */
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uint64_t dummy;
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read(g_kill_evt, &dummy, 8);
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ret = crosvm_destroy_memory(crosvm, &mem_obj);
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if (ret) {
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fprintf(stderr, "failed to destroy memory in crosvm: %d\n", ret);
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return 1;
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}
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ret = crosvm_set_hypercall_hint(crosvm, 0, NULL);
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if (ret) {
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fprintf(stderr, "failed to clear hypercall hint: %d\n", ret);
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return 1;
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}
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ret = crosvm_reserve_range(crosvm, CROSVM_ADDRESS_SPACE_IOPORT,
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HINT_ADDRESS, 0);
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if (ret) {
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fprintf(stderr, "failed to unreserve hint ioport range: %d\n", ret);
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return 1;
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}
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ret = crosvm_reserve_range(crosvm, CROSVM_ADDRESS_SPACE_IOPORT,
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KILL_ADDRESS, 0);
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if (ret) {
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fprintf(stderr, "failed to unreserve kill ioport range: %d\n", ret);
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return 1;
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}
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if (!got_regs) {
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fprintf(stderr, "vm ran to completion without reg query\n");
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return 1;
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}
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return 0;
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}
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