diff options
Diffstat (limited to 'tools')
7 files changed, 59 insertions, 14 deletions
diff --git a/tools/testing/selftests/powerpc/alignment/alignment_handler.c b/tools/testing/selftests/powerpc/alignment/alignment_handler.c index c25cf7cd45e9..33ee34fc0828 100644 --- a/tools/testing/selftests/powerpc/alignment/alignment_handler.c +++ b/tools/testing/selftests/powerpc/alignment/alignment_handler.c @@ -10,16 +10,7 @@ * * We create two sets of source and destination buffers, one in regular memory, * the other cache-inhibited (by default we use /dev/fb0 for this, but an - * alterative path for cache-inhibited memory may be provided). - * - * One way to get cache-inhibited memory is to use the "mem" kernel parameter - * to limit the kernel to less memory than actually exists. Addresses above - * the limit may still be accessed but will be treated as cache-inhibited. For - * example, if there is actually 4GB of memory and the parameter "mem=3GB" is - * used, memory from address 0xC0000000 onwards is treated as cache-inhibited. - * To access this region /dev/mem is used. The kernel should be configured - * without CONFIG_STRICT_DEVMEM. In this case use: - * ./alignment_handler /dev/mem 0xc0000000 + * alterative path for cache-inhibited memory may be provided, e.g. memtrace). * * We initialise the source buffers, then use whichever set of load/store * instructions is under test to copy bytes from the source buffers to the diff --git a/tools/testing/selftests/powerpc/mm/Makefile b/tools/testing/selftests/powerpc/mm/Makefile index defe488d6bf1..40253abc6208 100644 --- a/tools/testing/selftests/powerpc/mm/Makefile +++ b/tools/testing/selftests/powerpc/mm/Makefile @@ -5,6 +5,7 @@ noarg: TEST_GEN_PROGS := hugetlb_vs_thp_test subpage_prot prot_sao segv_errors wild_bctr \ large_vm_fork_separation bad_accesses pkey_exec_prot \ pkey_siginfo stack_expansion_signal stack_expansion_ldst +TEST_PROGS := stress_code_patching.sh TEST_GEN_PROGS_EXTENDED := tlbie_test TEST_GEN_FILES := tempfile diff --git a/tools/testing/selftests/powerpc/mm/stress_code_patching.sh b/tools/testing/selftests/powerpc/mm/stress_code_patching.sh new file mode 100755 index 000000000000..e454509659f6 --- /dev/null +++ b/tools/testing/selftests/powerpc/mm/stress_code_patching.sh @@ -0,0 +1,49 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +TIMEOUT=30 + +DEBUFS_DIR=`cat /proc/mounts | grep debugfs | awk '{print $2}'` +if [ ! -e "$DEBUFS_DIR" ] +then + echo "debugfs not found, skipping" 1>&2 + exit 4 +fi + +if [ ! -e "$DEBUFS_DIR/tracing/current_tracer" ] +then + echo "Tracing files not found, skipping" 1>&2 + exit 4 +fi + + +echo "Testing for spurious faults when mapping kernel memory..." + +if grep -q "FUNCTION TRACING IS CORRUPTED" "$DEBUFS_DIR/tracing/trace" +then + echo "FAILED: Ftrace already dead. Probably due to a spurious fault" 1>&2 + exit 1 +fi + +dmesg -C +START_TIME=`date +%s` +END_TIME=`expr $START_TIME + $TIMEOUT` +while [ `date +%s` -lt $END_TIME ] +do + echo function > $DEBUFS_DIR/tracing/current_tracer + echo nop > $DEBUFS_DIR/tracing/current_tracer + if dmesg | grep -q 'ftrace bug' + then + break + fi +done + +echo nop > $DEBUFS_DIR/tracing/current_tracer +if dmesg | grep -q 'ftrace bug' +then + echo "FAILED: Mapping kernel memory causes spurious faults" 1>&2 + exit 1 +else + echo "OK: Mapping kernel memory does not cause spurious faults" + exit 0 +fi diff --git a/tools/testing/selftests/powerpc/security/entry_flush.c b/tools/testing/selftests/powerpc/security/entry_flush.c index 78cf914fa321..68ce377b205e 100644 --- a/tools/testing/selftests/powerpc/security/entry_flush.c +++ b/tools/testing/selftests/powerpc/security/entry_flush.c @@ -53,7 +53,7 @@ int entry_flush_test(void) entry_flush = entry_flush_orig; - fd = perf_event_open_counter(PERF_TYPE_RAW, /* L1d miss */ 0x400f0, -1); + fd = perf_event_open_counter(PERF_TYPE_HW_CACHE, PERF_L1D_READ_MISS_CONFIG, -1); FAIL_IF(fd < 0); p = (char *)memalign(zero_size, CACHELINE_SIZE); diff --git a/tools/testing/selftests/powerpc/security/flush_utils.h b/tools/testing/selftests/powerpc/security/flush_utils.h index 07a5eb301466..7a3d60292916 100644 --- a/tools/testing/selftests/powerpc/security/flush_utils.h +++ b/tools/testing/selftests/powerpc/security/flush_utils.h @@ -9,6 +9,10 @@ #define CACHELINE_SIZE 128 +#define PERF_L1D_READ_MISS_CONFIG ((PERF_COUNT_HW_CACHE_L1D) | \ + (PERF_COUNT_HW_CACHE_OP_READ << 8) | \ + (PERF_COUNT_HW_CACHE_RESULT_MISS << 16)) + void syscall_loop(char *p, unsigned long iterations, unsigned long zero_size); diff --git a/tools/testing/selftests/powerpc/security/rfi_flush.c b/tools/testing/selftests/powerpc/security/rfi_flush.c index 7565fd786640..f73484a6470f 100644 --- a/tools/testing/selftests/powerpc/security/rfi_flush.c +++ b/tools/testing/selftests/powerpc/security/rfi_flush.c @@ -54,7 +54,7 @@ int rfi_flush_test(void) rfi_flush = rfi_flush_orig; - fd = perf_event_open_counter(PERF_TYPE_RAW, /* L1d miss */ 0x400f0, -1); + fd = perf_event_open_counter(PERF_TYPE_HW_CACHE, PERF_L1D_READ_MISS_CONFIG, -1); FAIL_IF(fd < 0); p = (char *)memalign(zero_size, CACHELINE_SIZE); diff --git a/tools/testing/selftests/powerpc/tm/tm-trap.c b/tools/testing/selftests/powerpc/tm/tm-trap.c index c75960af8018..11521077f915 100644 --- a/tools/testing/selftests/powerpc/tm/tm-trap.c +++ b/tools/testing/selftests/powerpc/tm/tm-trap.c @@ -66,7 +66,7 @@ void trap_signal_handler(int signo, siginfo_t *si, void *uc) /* Get thread endianness: extract bit LE from MSR */ thread_endianness = MSR_LE & ucp->uc_mcontext.gp_regs[PT_MSR]; - /*** + /* * Little-Endian Machine */ @@ -126,7 +126,7 @@ void trap_signal_handler(int signo, siginfo_t *si, void *uc) } } - /*** + /* * Big-Endian Machine */ |