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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>
static int child;
static struct cpc_event event;
uint64_t
monitor(struct kvm *kvm, bool baseline)
{
uint8_t counts[L1_SETS];
int ret;
ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event);
if (ret && errno == EAGAIN) return 0;
if (ret) err(1, "KVM_CPC_POLL_EVENT");
if (!baseline && event.type == CPC_EVENT_GUEST
&& event.guest.type == CPC_GUEST_STOP_TRACK)
return 2;
if (event.type == CPC_EVENT_TRACK_STEP) {
ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts);
if (ret) err(1, "KVM_CPC_READ_COUNTS");
printf("Event: rip:%08llx cnt:%llu inst:%08llx data:%08llx ret:%llu\n",
vm_get_rip(), 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, "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];
struct cpc_track_cfg cfg;
bool inst_gfn_avail;
uint64_t inst_gfn;
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-targetstep_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, "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");
} 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");
memset(&cfg, 0, sizeof(cfg));
cfg.mode = CPC_TRACK_STEPS;
cfg.steps.with_data = true;
ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &cfg);
if (ret) err(1, "KVM_CPC_TRACK_MODE");
arg = true;
ret = ioctl(kvm_dev, KVM_CPC_CALC_BASELINE, &arg);
if (ret) err(1, "KVM_CPC_CALC_BASELINE");
ipc_signal_child(ipc);
/* run vm while baseline is calculated */
eventcnt = 0;
while (eventcnt < 50) {
eventcnt += monitor(&kvm, true);
}
ret = ioctl(kvm_dev, KVM_CPC_VM_REQ_PAUSE);
if (ret) err(1, "KVM_CPC_VM_REQ_PAUSE");
while (1) {
ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event);
if (ret && errno == EAGAIN) continue;
if (ret) err(1, "KVM_CPC_POLL_EVENT");
if (event.type == CPC_EVENT_PAUSE) break;
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "KVM_CPC_ACK_EVENT");
}
arg = false;
ret = ioctl(kvm_dev, KVM_CPC_CALC_BASELINE, &arg);
if (ret) err(1, "KVM_CPC_CALC_BASELINE");
ret = ioctl(kvm_dev, KVM_CPC_READ_BASELINE, baseline);
if (ret) err(1, "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, "KMV_CPC_APPLY_BASELINE");
memset(&cfg, 0, sizeof(cfg));
cfg.mode = CPC_TRACK_PAGES;
ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &cfg);
if (ret) err(1, "KVM_CPC_TRACK_MODE");
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "KVM_CPC_ACK_EVENT");
/* wait for CPC_GUEST_START_TRACK */
inst_gfn_avail = false;
while (1) {
ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event);
if (ret && errno == EAGAIN) continue;
if (ret) err(1, "KVM_CPC_POLL_EVENT");
if (inst_gfn_avail && event.type == CPC_EVENT_GUEST
&& event.guest.type == CPC_GUEST_START_TRACK)
break;
if (event.type == CPC_EVENT_TRACK_PAGE) {
inst_gfn = event.page.inst_gfn;
inst_gfn_avail = true;
}
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "KVM_CPC_ACK_EVENT");
}
/* start step tracking for target gfn */
printf("Target GFN: %08llx\n", inst_gfn);
memset(&cfg, 0, sizeof(cfg));
cfg.mode = CPC_TRACK_STEPS;
cfg.steps.target_gfn = inst_gfn;
cfg.steps.use_target = true;
cfg.steps.with_data = true;
ret = ioctl(kvm_dev, KVM_CPC_TRACK_MODE, &cfg);
if (ret) err(1, "KVM_CPC_TRACK_MODE");
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret) err(1, "KVM_CPC_ACK_EVENT");
while (monitor(&kvm, false) != 2);
printf("Monitor exit\n");
}
ipc_free(ipc);
kvm_setup_deinit();
}
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