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Diffstat (limited to 'test/sevstep.c')
-rw-r--r--test/sevstep.c177
1 files changed, 19 insertions, 158 deletions
diff --git a/test/sevstep.c b/test/sevstep.c
index e9369e1..252bdcb 100644
--- a/test/sevstep.c
+++ b/test/sevstep.c
@@ -114,149 +114,10 @@ hexdump(void *data, int len)
__attribute__((section("guest_with"))) void
vm_guest_with(void)
{
- /* counter starts at 10 */
- // asm volatile("mov $10, %%ebx" : : : "ebx");
-
- //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");
- // asm volatile("imul %%ecx" : : : "ecx");
- // asm volatile("mov (%%eax), %%al" : : : "rax");
-
- /* increment counter (n) */
- // asm volatile("inc %%ebx" : : : "ebx");
-
- /* modulo 16 */
- // asm volatile("xor %%edx, %%edx" : : : "edx");
- // asm volatile("mov %%ebx, %%eax" : : : "ebx", "eax");
- // asm volatile("mov $16, %%ecx" : : : "ecx");
- // asm volatile("idiv %%ecx" : : : "ecx");
- // asm volatile("mov %%edx, %%ebx" : : : "ebx", "edx");
-
- /* L1_LINESIZE * (L1_SETS * 2 + TARGET_SET) = 0x23c0 */
- //asm volatile("movq $0x23c0, %%rcx; mov %%eax, (%%rcx); inc %%eax"
- // : : : "eax", "ebx", "rcx");
- //}
-
- asm volatile("hlt");
+ while (1) {
+ asm volatile("mov (%0), %%eax" : :
+ "r" (L1_LINESIZE * (L1_SETS * 3 + TARGET_SET)) : "rax");
+ }
}
bool
@@ -418,18 +279,20 @@ 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");
+ memset(vmsa, 0, PAGE_SIZE);
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);
+ sev_dbg_decrypt(vmfd, vmsa, CPC_VMSA_MAGIC_ADDR, PAGE_SIZE);
+ // hexdump(vmsa, PAGE_SIZE);
+
+ rip = *(uint64_t *)(vmsa + 0x178);
free(vmsa);
@@ -551,13 +414,19 @@ cpc_msrmt_t *
read_counts()
{
cpc_msrmt_t *counts;
- int ret;
+ int i, ret;
- counts = malloc(64 * sizeof(cpc_msrmt_t));
+ counts = malloc(L1_SETS * sizeof(cpc_msrmt_t));
if (!counts) err(1, "malloc");
+
ret = ioctl(kvm_dev, KVM_CPC_READ_COUNTS, counts);
if (ret == -1) err(1, "ioctl READ_COUNTS");
+ for (i = 0; i < L1_SETS; i++) {
+ if (counts[i] > 8)
+ errx(1, "Invalid counts set %i", i);
+ }
+
return counts;
}
@@ -608,14 +477,6 @@ runonce(struct kvm *kvm)
if (ret < 0) err(1, "KVM_RUN");
}
-uint64_t
-svm_dbg_rip(struct kvm *kvm)
-{
- /* TODO: decrypt vmsa */
-
- return 0;
-}
-
int
monitor(struct kvm *kvm, bool baseline)
{
@@ -728,7 +589,7 @@ main(int argc, const char **argv)
if (ret == -1) err(1, "ioctl MEASURE_BASELINE");
faultcnt = 0;
- while (faultcnt < 20) {
+ while (faultcnt < 30) {
if (monitor(&kvm_with_access, true)) break;
}
@@ -765,7 +626,7 @@ main(int argc, const char **argv)
if (ret == -1) err(1, "ioctl ACK_EVENT");
faultcnt = 0;
- while (faultcnt < 20) {
+ while (faultcnt < 30) {
if (monitor(&kvm_with_access, false)) break;
}
generated by cgit v1.2.3-71-gd317 (git 2.46.0) at 2025-12-05 13:21:13 +0000