106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright 2015, Michael Neuling, IBM Corp.
|
|
*
|
|
* Original: Michael Neuling 4/12/2013
|
|
* Edited: Rashmica Gupta 4/12/2015
|
|
*
|
|
* See if the altivec state is leaked out of an aborted transaction due to
|
|
* kernel vmx copy loops.
|
|
*
|
|
* When the transaction aborts, VSR values should rollback to the values
|
|
* they held before the transaction commenced. Using VSRs while transaction
|
|
* is suspended should not affect the checkpointed values.
|
|
*
|
|
* (1) write A to a VSR
|
|
* (2) start transaction
|
|
* (3) suspend transaction
|
|
* (4) change the VSR to B
|
|
* (5) trigger kernel vmx copy loop
|
|
* (6) abort transaction
|
|
* (7) check that the VSR value is A
|
|
*/
|
|
|
|
#include <inttypes.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "tm.h"
|
|
#include "utils.h"
|
|
|
|
int test_vmxcopy()
|
|
{
|
|
long double vecin = 1.3;
|
|
long double vecout;
|
|
unsigned long pgsize = getpagesize();
|
|
int i;
|
|
int fd;
|
|
int size = pgsize*16;
|
|
char tmpfile[] = "/tmp/page_faultXXXXXX";
|
|
char buf[pgsize];
|
|
char *a;
|
|
uint64_t aborted = 0;
|
|
|
|
SKIP_IF(!have_htm());
|
|
SKIP_IF(htm_is_synthetic());
|
|
SKIP_IF(!is_ppc64le());
|
|
|
|
fd = mkstemp(tmpfile);
|
|
assert(fd >= 0);
|
|
|
|
memset(buf, 0, pgsize);
|
|
for (i = 0; i < size; i += pgsize)
|
|
assert(write(fd, buf, pgsize) == pgsize);
|
|
|
|
unlink(tmpfile);
|
|
|
|
a = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
|
|
assert(a != MAP_FAILED);
|
|
|
|
asm __volatile__(
|
|
"lxvd2x 40,0,%[vecinptr];" /* set 40 to initial value*/
|
|
"tbegin.;"
|
|
"beq 3f;"
|
|
"tsuspend.;"
|
|
"xxlxor 40,40,40;" /* set 40 to 0 */
|
|
"std 5, 0(%[map]);" /* cause kernel vmx copy page */
|
|
"tabort. 0;"
|
|
"tresume.;"
|
|
"tend.;"
|
|
"li %[res], 0;"
|
|
"b 5f;"
|
|
|
|
/* Abort handler */
|
|
"3:;"
|
|
"li %[res], 1;"
|
|
|
|
"5:;"
|
|
"stxvd2x 40,0,%[vecoutptr];"
|
|
: [res]"=&r"(aborted)
|
|
: [vecinptr]"r"(&vecin),
|
|
[vecoutptr]"r"(&vecout),
|
|
[map]"r"(a)
|
|
: "memory", "r0", "r3", "r4", "r5", "r6", "r7");
|
|
|
|
if (aborted && (vecin != vecout)){
|
|
printf("FAILED: vector state leaked on abort %f != %f\n",
|
|
(double)vecin, (double)vecout);
|
|
return 1;
|
|
}
|
|
|
|
munmap(a, size);
|
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
return test_harness(test_vmxcopy, "tm_vmxcopy");
|
|
}
|