mirror of
https://github.com/apple-oss-distributions/xnu.git
synced 2026-01-11 20:06:33 +00:00
91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2021 Apple Computer, Inc. All rights reserved.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
|
|
*
|
|
* This file contains Original Code and/or Modifications of Original Code
|
|
* as defined in and that are subject to the Apple Public Source License
|
|
* Version 2.0 (the 'License'). You may not use this file except in
|
|
* compliance with the License. The rights granted to you under the License
|
|
* may not be used to create, or enable the creation or redistribution of,
|
|
* unlawful or unlicensed copies of an Apple operating system, or to
|
|
* circumvent, violate, or enable the circumvention or violation of, any
|
|
* terms of an Apple operating system software license agreement.
|
|
*
|
|
* Please obtain a copy of the License at
|
|
* http://www.opensource.apple.com/apsl/ and read it before using this file.
|
|
*
|
|
* The Original Code and all software distributed under the License are
|
|
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
|
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
|
* Please see the License for the specific language governing rights and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
|
|
*/
|
|
/**
|
|
* On devices that support it, this test ensures that PSTATE.SSBS is set by
|
|
* default and is writeable by userspace.
|
|
*/
|
|
#include <darwintest.h>
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <mach/mach.h>
|
|
#include <mach/thread_status.h>
|
|
#include <sys/sysctl.h>
|
|
#include <inttypes.h>
|
|
|
|
|
|
T_GLOBAL_META(
|
|
T_META_RADAR_COMPONENT_NAME("xnu"),
|
|
T_META_RADAR_COMPONENT_VERSION("arm"),
|
|
T_META_OWNER("dmitry_grinberg"),
|
|
T_META_RUN_CONCURRENTLY(true));
|
|
|
|
|
|
#define PSR64_SSBS (0x1000)
|
|
#define REG_SSBS "S3_3_C4_C2_6" /* clang will not emit MRS/MSR to "SSBS" itself since it doesnt always exist */
|
|
|
|
T_DECL(armv85_ssbs,
|
|
"Test that ARMv8.5 SSBS is off by default (PSTATE.SSBS==1, don't ask!) and can be enabled by userspace.", T_META_TAG_VM_NOT_ELIGIBLE)
|
|
{
|
|
#ifndef __arm64__
|
|
T_SKIP("Running on non-arm64 target, skipping...");
|
|
#else
|
|
uint32_t ssbs_support = 19180;
|
|
size_t ssbs_support_len = sizeof(ssbs_support);
|
|
if (sysctlbyname("hw.optional.arm.FEAT_SSBS", &ssbs_support, &ssbs_support_len, NULL, 0)) {
|
|
T_SKIP("Could not get SSBS support sysctl, skipping...");
|
|
} else if (!ssbs_support) {
|
|
T_SKIP("HW has no SSBS support, skipping...");
|
|
} else if (ssbs_support != 1) {
|
|
T_FAIL("SSBS support sysctl contains garbage: %u!", ssbs_support);
|
|
} else {
|
|
uint64_t ssbs_state = __builtin_arm_rsr64(REG_SSBS);
|
|
|
|
if (!(ssbs_state & PSR64_SSBS)) {
|
|
T_FAIL("SSBS does not default to off (value seen: 0x%" PRIx64 ")!", ssbs_state);
|
|
}
|
|
|
|
__builtin_arm_wsr64(REG_SSBS, 0);
|
|
ssbs_state = __builtin_arm_rsr64(REG_SSBS);
|
|
|
|
if (ssbs_state & PSR64_SSBS) {
|
|
T_FAIL("SSBS did not turn on (value seen: 0x%" PRIx64 ")!", ssbs_state);
|
|
}
|
|
|
|
__builtin_arm_wsr64(REG_SSBS, PSR64_SSBS);
|
|
ssbs_state = __builtin_arm_rsr64(REG_SSBS);
|
|
|
|
if (!(ssbs_state & PSR64_SSBS)) {
|
|
T_FAIL("SSBS did not turn off (value seen: 0x%" PRIx64 ")!", ssbs_state);
|
|
}
|
|
|
|
T_PASS("SSBS test passes");
|
|
}
|
|
#endif /* __arm64__ */
|
|
}
|