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-rw-r--r--test/sevstep.c205
1 files changed, 178 insertions, 27 deletions
diff --git a/test/sevstep.c b/test/sevstep.c
index a2319b5..3970503 100644
--- a/test/sevstep.c
+++ b/test/sevstep.c
@@ -116,12 +116,125 @@ vm_guest_with(void)
{
/* counter starts at 10 */
// asm volatile("mov $10, %%ebx" : : : "ebx");
- asm volatile("mov (%0), %%al" : :
- "r"(L1_LINESIZE * L1_SETS * 3) : "al");
- asm volatile("mov (%0), %%al" : :
- "r"(L1_LINESIZE * L1_SETS * 3) : "al");
- while (1) {
+ //while (1) {
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
+ asm volatile("mov $0x3140, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x3180, %%rax; mov (%%rax), %%al" : : : "rax");
+ asm volatile("mov $0x31c0, %%rax; mov (%%rax), %%al" : : : "rax");
+
/* read from n'th page */
// asm volatile("mov %0, %%ecx" : : "r" (L1_LINESIZE * L1_SETS) : "ecx");
// asm volatile("mov %%ebx, %%eax" : : : "ebx", "eax");
@@ -141,7 +254,7 @@ vm_guest_with(void)
/* L1_LINESIZE * (L1_SETS * 2 + TARGET_SET) = 0x23c0 */
//asm volatile("movq $0x23c0, %%rcx; mov %%eax, (%%rcx); inc %%eax"
// : : : "eax", "ebx", "rcx");
- }
+ //}
asm volatile("hlt");
}
@@ -300,6 +413,29 @@ sev_dbg_decrypt(int vmfd, void *dst, void *src, size_t size)
strerror(errno), sev_fwerr_str(fwerr));
}
+uint64_t
+sev_dbg_rip(int vmfd)
+{
+ void *vmsa;
+ uint64_t rip;
+ uint8_t buf[16];
+ int ret;
+
+ vmsa = NULL;
+ if (posix_memalign(&vmsa, PAGE_SIZE, PAGE_SIZE))
+ err(1, "memalign");
+
+ ret = ioctl(kvm_dev, KVM_CPC_VMSA_READ, vmsa);
+ if (ret == -1) err(1, "ioctl VMSA_READ");
+
+ sev_dbg_decrypt(vmfd, buf, vmsa + 0x160, 16);
+ hexdump(buf, 16);
+
+ free(vmsa);
+
+ return rip;
+}
+
void
sev_kvm_init(struct kvm *kvm, size_t ramsize, void *code_start, void *code_stop)
{
@@ -442,8 +578,24 @@ print_counts(cpc_msrmt_t *counts)
printf("\x1b[0m");
}
printf("\n");
- printf(" Target Set %i Count: %llu\n",
- TARGET_SET, counts[TARGET_SET]);
+}
+
+void
+print_counts_raw(cpc_msrmt_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("%02X ", (uint8_t) counts[i]);
+ if (counts[i] > 0)
+ printf("\x1b[0m");
+ }
printf("\n");
}
@@ -469,31 +621,27 @@ monitor(struct kvm *kvm, bool baseline)
{
struct cpc_track_event event;
cpc_msrmt_t counts[64];
- uint64_t counter_addr;
- uint64_t counter;
+ uint64_t rip;
int ret, i;
/* Get page fault info */
ret = ioctl(kvm_dev, KVM_CPC_POLL_EVENT, &event);
if (!ret) {
- if (baseline && event.data_fault_avail)
- errx(1, "Baseline measurement has data fault\n");
-
if (!baseline) {
- counter_addr = L1_LINESIZE * (L1_SETS + TARGET_SET);
- memcpy(&counter, kvm->mem + counter_addr, 8);
- //sev_dbg_decrypt(kvm->vmfd, &counter, &counter_enc, 8);
- printf("Event: inst:%llu data:%llu retired:%llu cnt:%16llX\n",
+ rip = sev_dbg_rip(kvm->vmfd);
+ printf("Event: inst:%llu data:%llu retired:%llu rip:%llu\n",
event.inst_fault_gfn, event.data_fault_gfn,
- event.retinst, counter);
+ event.retinst, rip);
}
faultcnt++;
ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts);
if (ret == -1) err(1, "ioctl READ_COUNTS");
- if (!baseline)
+ if (!baseline) {
print_counts(counts);
+ printf("\n");
+ }
for (i = 0; i < 64; i++) {
if (counts[i] > 8) {
@@ -552,6 +700,11 @@ main(int argc, const char **argv)
ret = ioctl(kvm_dev, KVM_CPC_RESET_TRACKING, NULL);
if (ret == -1) err(1, "ioctl RESET_TRACKING");
+ /* Do data access stepping */
+ arg = true;
+ ret = ioctl(kvm_dev, KVM_CPC_TRACK_SINGLE_STEP, &arg);
+ if (ret == -1) err(1, "ioctl TRACK_SINGLE_STEP");
+
/* Init page tracking */
track_mode = KVM_PAGE_TRACK_ACCESS;
ret = ioctl(kvm_dev, KVM_CPC_TRACK_ALL, &track_mode);
@@ -575,7 +728,7 @@ main(int argc, const char **argv)
if (ret == -1) err(1, "ioctl MEASURE_BASELINE");
faultcnt = 0;
- while (faultcnt < 100) {
+ while (faultcnt < 20) {
if (monitor(&kvm_with_access, true)) break;
}
@@ -595,11 +748,13 @@ main(int argc, const char **argv)
printf("\n>>> BASELINE:\n");
print_counts(baseline);
printf("\n");
+ print_counts_raw(baseline);
+ printf("\n");
- /* check baseline for saturated sets */
+ /* Check baseline for saturated sets */
for (i = 0; i < 64; i++) {
if (baseline[i] >= 8)
- printf("!!! Baseline set %i full\n", i);
+ errx(1, "!!! Baseline set %i full\n", i);
}
arg = true;
@@ -609,12 +764,8 @@ main(int argc, const char **argv)
ret = ioctl(kvm_dev, KVM_CPC_ACK_EVENT, &event.id);
if (ret == -1) err(1, "ioctl ACK_EVENT");
- arg = true;
- ret = ioctl(kvm_dev, KVM_CPC_TRACK_SINGLE_STEP, &arg);
- if (ret == -1) err(1, "ioctl TRACK_SINGLE_STEP");
-
faultcnt = 0;
- while (faultcnt < 10) {
+ while (faultcnt < 20) {
if (monitor(&kvm_with_access, false)) break;
}
generated by cgit v1.2.3-71-gd317 (git 2.46.0) at 2025-12-05 13:21:56 +0000