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selftests/x86/amx: Update the ARCH_REQ_XCOMP_PERM test

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Update the arch_prctl test to check the permission bitmap whether the
requested feature is added as expected or not.

Every non-dynamic feature that is enabled is permitted already for use.
TILECFG is not dynamic feature. Ensure the bit is always on from
ARCH_GET_XCOMP_PERM.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220129173647.27981-3-chang.seok.bae@intel.com
This commit is contained in:
Chang S. Bae 2022-01-29 09:36:47 -08:00 committed by Thomas Gleixner
parent 063452fd94
commit 20df737561
1 changed files with 14 additions and 2 deletions
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16
tools/testing/selftests/x86/amx.c
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@ -368,9 +368,16 @@ static void req_xtiledata_perm(void)
static void validate_req_xcomp_perm(enum expected_result exp)
{
unsigned long bitmask;
unsigned long bitmask, expected_bitmask;
long rc;
rc = syscall(SYS_arch_prctl, ARCH_GET_XCOMP_PERM, &bitmask);
if (rc) {
fatal_error("prctl(ARCH_GET_XCOMP_PERM) error: %ld", rc);
} else if (!(bitmask & XFEATURE_MASK_XTILECFG)) {
fatal_error("ARCH_GET_XCOMP_PERM returns XFEATURE_XTILECFG off.");
}
rc = syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_PERM, XFEATURE_XTILEDATA);
if (exp == FAIL_EXPECTED) {
if (rc) {
@ -383,10 +390,15 @@ static void validate_req_xcomp_perm(enum expected_result exp)
fatal_error("ARCH_REQ_XCOMP_PERM saw unexpected failure.\n");
}
expected_bitmask = bitmask | XFEATURE_MASK_XTILEDATA;
rc = syscall(SYS_arch_prctl, ARCH_GET_XCOMP_PERM, &bitmask);
if (rc) {
fatal_error("prctl(ARCH_GET_XCOMP_PERM) error: %ld", rc);
} else if (bitmask & XFEATURE_MASK_XTILE) {
} else if (bitmask != expected_bitmask) {
fatal_error("ARCH_REQ_XCOMP_PERM set a wrong bitmask: %lx, expected: %lx.\n",
bitmask, expected_bitmask);
} else {
printf("\tARCH_REQ_XCOMP_PERM is successful.\n");
}
}