119 lines
2.4 KiB
C
119 lines
2.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Copyright 2017, Michael Neuling, IBM Corp.
|
||
|
|
* Original: Breno Leitao <brenohl@br.ibm.com> &
|
||
|
|
* Gustavo Bueno Romero <gromero@br.ibm.com>
|
||
|
|
* Edited: Michael Neuling
|
||
|
|
*
|
||
|
|
* Force VMX unavailable during a transaction and see if it corrupts
|
||
|
|
* the checkpointed VMX register state after the abort.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <inttypes.h>
|
||
|
|
#include <htmintrin.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
#include <sys/mman.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
|
||
|
|
#include "tm.h"
|
||
|
|
#include "utils.h"
|
||
|
|
|
||
|
|
int passed;
|
||
|
|
|
||
|
|
void *worker(void *unused)
|
||
|
|
{
|
||
|
|
__int128 vmx0;
|
||
|
|
uint64_t texasr;
|
||
|
|
|
||
|
|
asm goto (
|
||
|
|
"li 3, 1;" /* Stick non-zero value in VMX0 */
|
||
|
|
"std 3, 0(%[vmx0_ptr]);"
|
||
|
|
"lvx 0, 0, %[vmx0_ptr];"
|
||
|
|
|
||
|
|
/* Wait here a bit so we get scheduled out 255 times */
|
||
|
|
"lis 3, 0x3fff;"
|
||
|
|
"1: ;"
|
||
|
|
"addi 3, 3, -1;"
|
||
|
|
"cmpdi 3, 0;"
|
||
|
|
"bne 1b;"
|
||
|
|
|
||
|
|
/* Kernel will hopefully turn VMX off now */
|
||
|
|
|
||
|
|
"tbegin. ;"
|
||
|
|
"beq failure;"
|
||
|
|
|
||
|
|
/* Cause VMX unavail. Any VMX instruction */
|
||
|
|
"vaddcuw 0,0,0;"
|
||
|
|
|
||
|
|
"tend. ;"
|
||
|
|
"b %l[success];"
|
||
|
|
|
||
|
|
/* Check VMX0 sanity after abort */
|
||
|
|
"failure: ;"
|
||
|
|
"lvx 1, 0, %[vmx0_ptr];"
|
||
|
|
"vcmpequb. 2, 0, 1;"
|
||
|
|
"bc 4, 24, %l[value_mismatch];"
|
||
|
|
"b %l[value_match];"
|
||
|
|
:
|
||
|
|
: [vmx0_ptr] "r"(&vmx0)
|
||
|
|
: "r3"
|
||
|
|
: success, value_match, value_mismatch
|
||
|
|
);
|
||
|
|
|
||
|
|
/* HTM aborted and VMX0 is corrupted */
|
||
|
|
value_mismatch:
|
||
|
|
texasr = __builtin_get_texasr();
|
||
|
|
|
||
|
|
printf("\n\n==============\n\n");
|
||
|
|
printf("Failure with error: %lx\n", _TEXASR_FAILURE_CODE(texasr));
|
||
|
|
printf("Summary error : %lx\n", _TEXASR_FAILURE_SUMMARY(texasr));
|
||
|
|
printf("TFIAR exact : %lx\n\n", _TEXASR_TFIAR_EXACT(texasr));
|
||
|
|
|
||
|
|
passed = 0;
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
/* HTM aborted but VMX0 is correct */
|
||
|
|
value_match:
|
||
|
|
// printf("!");
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
success:
|
||
|
|
// printf(".");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int tm_vmx_unavail_test()
|
||
|
|
{
|
||
|
|
int threads;
|
||
|
|
pthread_t *thread;
|
||
|
|
|
||
|
|
SKIP_IF(!have_htm());
|
||
|
|
|
||
|
|
passed = 1;
|
||
|
|
|
||
|
|
threads = sysconf(_SC_NPROCESSORS_ONLN) * 4;
|
||
|
|
thread = malloc(sizeof(pthread_t)*threads);
|
||
|
|
if (!thread)
|
||
|
|
return EXIT_FAILURE;
|
||
|
|
|
||
|
|
for (uint64_t i = 0; i < threads; i++)
|
||
|
|
pthread_create(&thread[i], NULL, &worker, NULL);
|
||
|
|
|
||
|
|
for (uint64_t i = 0; i < threads; i++)
|
||
|
|
pthread_join(thread[i], NULL);
|
||
|
|
|
||
|
|
free(thread);
|
||
|
|
|
||
|
|
return passed ? EXIT_SUCCESS : EXIT_FAILURE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
return test_harness(tm_vmx_unavail_test, "tm_vmx_unavail_test");
|
||
|
|
}
|