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#include "test/kvm-eviction.h"
#include "test/kvm.h"
#include "test/util.h"
#include "cachepc/uapi.h"
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <err.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#define TARGET_CORE 2
#define SECONDARY_CORE 3
static int child;
static struct cpc_event event;
uint64_t
monitor(struct kvm *kvm, bool baseline)
{
uint8_t counts[64];
int ret;
/* Get page fault info */
ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event);
if (ret && errno == EAGAIN) return 0;
if (ret) err(1, "ioctl KVM_CPC_POLL_EVENT");
if (event.type != CPC_EVENT_TRACK_STEP)
errx(1, "unexpected event type %i", event.type);
ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts);
if (ret) err(1, "ioctl KVM_CPC_READ_COUNTS");
printf("Event: rip:%llu cnt:%llu inst:%llu data:%llu ret:%llu\n",
vm_get_rip(kvm), event.step.fault_count,
event.step.fault_gfns[0], event.step.fault_gfns[1],
event.step.retinst);
print_counts(counts);
printf("\n");
print_counts_raw(counts);
printf("\n");
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "ioctl KVM_CPC_ACK_EVENT");
return 1;
}
void
kill_child(void)
{
printf("Killing vm..\n");
kill(child, SIGKILL);
}
int
main(int argc, const char **argv)
{
struct ipc *ipc;
struct guest guest;
struct kvm kvm;
uint8_t baseline[L1_SETS];
uint64_t eventcnt;
uint32_t arg;
int 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 vm mode: %s", vmtype);
setvbuf(stdout, NULL, _IONBF, 0);
kvm_setup_init();
ipc = ipc_alloc();
child = fork();
if (child < 0) err(1, "fork");
if (child == 0) {
pin_process(0, TARGET_CORE, true);
guest_init(&guest, "test/kvm-step_guest");
vm_init(&kvm, &guest);
guest_deinit(&guest);
/* reset kernel module state */
ret = ioctl(kvm_dev, KVM_CPC_RESET, NULL);
if (ret < 0) err(1, "ioctl KVM_CPC_RESET");
ipc_signal_parent(ipc);
ipc_wait_parent(ipc);
printf("VM start\n");
do {
ret = ioctl(kvm.vcpufd, KVM_RUN, NULL);
if (ret < 0) err(1, "KVM_RUN");
if (kvm.run->exit_reason == KVM_EXIT_HLT)
printf("VM halt\n");
} while (kvm.run->exit_reason == KVM_EXIT_HLT);
printf("VM exit\n");
vm_deinit(&kvm);
} else {
pin_process(0, SECONDARY_CORE, true);
atexit(kill_child);
ipc_wait_child(ipc);
printf("Monitor start\n");
/* capture baseline by just letting it fault over and over */
arg = CPC_TRACK_FAULT_NO_RUN;
ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &arg);
if (ret) err(1, "ioctl KVM_CPC_TRACK_MODE");
/* calculate baseline while running vm */
arg = true;
ret = ioctl(kvm_dev, KVM_CPC_CALC_BASELINE, &arg);
if (ret) err(1, "ioctl KVM_CPC_CALC_BASELINE");
ipc_signal_child(ipc);
/* run vm while baseline is calculated */
eventcnt = 0;
while (eventcnt < 50) {
eventcnt += monitor(&kvm, true);
}
printf("Req pause\n");
ret = ioctl(kvm_dev, KVM_CPC_VM_REQ_PAUSE);
if (ret) err(1, "ioctl KVM_CPC_VM_REQ_PAUSE");
while (1) {
printf("Monitor Polling\n");
ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event);
if (ret && errno == EAGAIN) continue;
if (ret) err(1, "ioctl KVM_CPC_POLL_EVENT");
printf("Monitor Event\n");
if (event.type == CPC_EVENT_PAUSE) break;
printf("Skipping non-pause event..\n");
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "ioctl KVM_CPC_ACK_EVENT");
}
arg = false;
ret = ioctl(kvm_dev, KVM_CPC_CALC_BASELINE, &arg);
if (ret) err(1, "ioctl KVM_CPC_CALC_BASELINE");
ret = ioctl(kvm_dev, KVM_CPC_READ_BASELINE, baseline);
if (ret) err(1, "ioctl KVM_CPC_READ_BASELINE");
printf("\nBaseline:\n");
print_counts(baseline);
printf("\n");
print_counts_raw(baseline);
printf("\n\n");
arg = true;
ret = ioctl(kvm_dev, KVM_CPC_APPLY_BASELINE, &arg);
if (ret) err(1, "ioctl KMV_CPC_APPLY_BASELINE");
/* single step and log all accessed pages */
arg = CPC_TRACK_FULL;
ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &arg);
if (ret) err(1, "ioctl KVM_CPC_TRACK_MODE");
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "ioctl KVM_CPC_ACK_EVENT");
eventcnt = 0;
while (eventcnt < 50) {
eventcnt += monitor(&kvm, false);
}
printf("Monitor exit\n");
}
ipc_free(ipc);
kvm_setup_deinit();
}
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