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2023-04-20selftests/powerpc/dscr: Restore timeout to DSCR selftestsBenjamin Gray2-3/+0
Reducing the time taken by dscr_sysfs_test.c allows restoring the default timeout, which was removed in commit 850507f30c38 ("selftests/powerpc: Turn off timeout setting for benchmarks, dscr, signal, tm") because that test took too long. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20selftests/powerpc/dscr: Speed up DSCR sysfs testsBenjamin Gray1-7/+4
This test case is extremely slow, taking around a minute compared to most of the other DSCR tests taking a second at most. Perf shows most time is spent by the kernel switching to each CPU it reads in /sys/devices/system/cpu. This switching is an unavoidable consequnce of reading all the .../cpuN/dscr values. Remove the outer iteration loop from this test case, reducing the reads from 1600 to 16. This still updates the DSCR 16 times and verifies on every CPU each time, so I do not expect the lower coverage to be meaningful. The speedup is significant: back down to ~1 second like the other tests. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20selftests/powerpc/dscr: Improve DSCR explicit random test caseBenjamin Gray3-115/+113
The tests currently have a single writer thread updating the system DSCR with a 1/1000 chance looped only 100 times. So only around one in 10 runs actually do anything. * Add multiple threads to the dscr_explicit_random_test case. * Use a barrier to make all the threads start work as simultaneously as possible. * Use a rwlock and make all threads have a reasonable chance to write to the DSCR on each iteration. PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP is used to prevent writers from starving while all the other threads keep reading. Logging the reads/writes shows a decent mix across the whole test. * Allow all threads a chance to write. * Make the chance of writing more likely. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20selftests/powerpc/dscr: Add lockstep test cases to DSCR explicit testsBenjamin Gray3-14/+159
Add new cases to the relevant tests that use explicitly synchronized threads to test the behaviour across context switches with less randomness. By locking the participants to the same CPU we guarantee a context switch occurs each time they make progress, which is a likely failure point if the kernel is not tracking the thread local DSCR correctly. The random case is left in to keep exercising potential edge cases. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20selftests/powerpc: Allow bind_to_cpu() to automatically pick CPUBenjamin Gray7-15/+21
All current users of bind_to_cpu() don't care _which_ CPU they get, just that they are bound to a single free one. So alter the interface to 1. Accept a BIND_CPU_ANY value that tells it to automatically pick a CPU 2. Return the picked CPU And convert all these users to bind_to_cpu(BIND_CPU_ANY). Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20selftests/powerpc: Move bind_to_cpu() to utils.hBenjamin Gray4-14/+13
This function will be useful in the DSCR test patches later in this series, so promote it to be shared by all powerpc selftests. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20selftests/powerpc/dscr: Correct typosBenjamin Gray3-6/+6
Correct a couple of typos while working on other improvements to the DSCR tests. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-04-20powerpc: add CFUNC assembly label annotationNicholas Piggin2-0/+2
This macro is to be used in assembly where C functions are called. pcrel addressing mode requires branches to functions with a localentry value of 1 to have either a trailing nop or @notoc. This macro permits the latter without changing callers. Signed-off-by: Nicholas Piggin <[email protected]> [mpe: Add dummy definitions to fix selftests build] Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-03-30selftests/powerpc: Make dd output quietBenjamin Gray1-1/+1
dd logs info to stderr by default. This info is pointless in the selftests and makes legitimate issues harder to spot. Pass the option to silence the info logs. Actual errors would still be printed. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-03-30selftests/powerpc: Pass make context to childrenBenjamin Gray2-16/+16
Make supports passing the 'jobserver' (parallel make support) to child invocations of make when either 1. The target command uses $(MAKE) directly 2. The command starts with '+' This context is not passed through expansions that result in $(MAKE), so the macros used in several places fail to pass on the jobserver context. Warnings are also raised by the child mentioning this. Prepend macros lines that invoke $(MAKE) with '+' to allow passing the jobserver context to these children. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-03-30selftests/powerpc: Use CLEAN macro to fix make warningBenjamin Gray1-2/+5
The CLEAN macro was added in 337f1e36 to prevent the Makefile:50: warning: overriding recipe for target 'clean' ../../lib.mk:124: warning: ignoring old recipe for target 'clean' style warnings. Expand it's use to fix another case of redefining a target directly. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-03-15selftests/powerpc/pmu: Fix sample field check in the ↵Kajol Jain1-2/+2
mmcra_thresh_marked_sample_test The testcase verifies the setting of different fields in Monitor Mode Control Register A (MMCRA). In the current code, EV_CODE_EXTRACT macro is used to extract the "sample" field, which then needs to be further processed to fetch rand_samp_elig and rand_samp_mode bits. But the current code is not passing valid sample field to EV_CODE_EXTRACT macro. Patch addresses this by fixing the input for EV_CODE_EXTRACT. Fixes: 29cf373c5766 ("selftests/powerpc/pmu: Add interface test for mmcra register fields") Reported-by: David Binderman <[email protected]> Link: https://lore.kernel.org/r/DB6P189MB0568CF002762C6C43AF6DF169CA89@DB6P189MB0568.EURP189.PROD.OUTLOOK.COM Signed-off-by: Kajol Jain <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-03-15selftests/powerpc: Increase timeout for vsx_signal testMichael Neuling1-0/+1
On the max config P10 machine (1920 threads and 64TB) this test fails with a timeout: Sending signals to all threads 10 times...!! killing vmx_signal !! child died by signal 15 failure: vmx_signal The default timeout is 120sec so increase this 3x to 360sec. With this change the test passes on these large machines. Signed-off-by: Michael Neuling <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
2023-02-15selftests/powerpc: Fix incorrect kernel headers search pathMathieu Desnoyers4-4/+4
Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents building against kernel headers from the build environment in scenarios where kernel headers are installed into a specific output directory (O=...). Cc: [email protected] # v5.18+ Signed-off-by: Mathieu Desnoyers <[email protected]> Acked-by: Shuah Khan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2023-02-09selftests/powerpc: Add automatically allocating read_fileBenjamin Gray5-109/+71
A couple of tests roll their own auto-allocating file read logic. Add a generic implementation and convert them to use it. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2023-02-09selftests/powerpc: Add {read,write}_{long,ulong}Benjamin Gray5-22/+95
Add helper functions to read and write (unsigned) long values directly from/to files. One of the kernel interfaces uses hex strings, so we need to allow passing a base too. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2023-02-09selftests/powerpc: Parse long/unsigned long value safelyBenjamin Gray3-7/+132
Often a file is expected to hold an integral value. Existing functions will use a C stdlib function like atoi or strtol to parse the file. These operations are error prone, with complicated error conditions (atoi returns 0 if not a number, and is undefined behaviour if not in range. strtol returns 0 if not a number, and LONG_MIN/MAX if not in range + sets errno to ERANGE). Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2023-02-09selftests/powerpc: Add read/write debugfs file, intBenjamin Gray5-35/+47
Debugfs files are not always integers, so make *_file return/write a byte buffer, and *_int deal with int values specifically. This increases consistency with the other file read/write helpers. Signed-off-by: Benjamin Gray <[email protected]> Reviewed-by: Andrew Donnellan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2023-02-09selftests/powerpc: Add generic read/write file utilBenjamin Gray7-160/+120
File read/write is reimplemented in about 5 different ways in the various PowerPC selftests. This indicates it should be a common util. Add a common read_file / write_file implementation and convert users to it where (easily) possible. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-12-05selftests/powerpc: Fix resource leaksMiaoqian Lin1-1/+4
In check_all_cpu_dscr_defaults, opendir() opens the directory stream. Add missing closedir() in the error path to release it. In check_cpu_dscr_default, open() creates an open file descriptor. Add missing close() in the error path to release it. Fixes: ebd5858c904b ("selftests/powerpc: Add test for all DSCR sysfs interfaces") Signed-off-by: Miaoqian Lin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-12-02selftests/powerpc: Add ptrace setup_core_pattern() null-terminatorBenjamin Gray1-1/+3
- malloc() does not zero the buffer, - fread() does not null-terminate it's output, - `cat /proc/sys/kernel/core_pattern | hexdump -C` shows the file is not inherently null-terminated So using string operations on the buffer is risky. Explicitly add a null character to the end to make it safer. Signed-off-by: Benjamin Gray <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-12-02selftests/powerpc: Use mfspr/mtspr macrosBenjamin Gray4-21/+10
No need to write inline asm for mtspr/mfspr, we have macros for this in reg.h Signed-off-by: Benjamin Gray <[email protected]> Reviewed-by: Andrew Donnellan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-12-02selftests: powerpc: Use "grep -E" instead of "egrep"Tiezhu Yang1-1/+1
The latest version of grep claims the egrep is now obsolete so the build now contains warnings that look like: egrep: warning: egrep is obsolescent; using grep -E fix this using "grep -E" instead. sed -i "s/egrep/grep -E/g" `grep egrep -rwl tools/testing/selftests/powerpc` Here are the steps to install the latest grep: wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz tar xf grep-3.8.tar.gz cd grep-3.8 && ./configure && make sudo make install export PATH=/usr/local/bin:$PATH Signed-off-by: Tiezhu Yang <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-11-30selftests/powerpc: Account for offline cpus in perf-hwbreak testNaveen N. Rao1-6/+39
For systemwide tests, use online cpu mask to only open events on online cpus. This enables this test to work on systems in lower SMT modes. Signed-off-by: Naveen N. Rao <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/15fd447dcefd19945a7d31f0a475349f548a3603.1669096083.git.naveen.n.rao@linux.vnet.ibm.com
2022-11-30selftests/powerpc: Bump up rlimit for perf-hwbreak testNaveen N. Rao1-0/+12
The systemwide perf hardware breakpoint test tries to open a perf event on each cpu. On large systems, we run out of file descriptors and fail the test. Instead, have the test set the file descriptor limit to an arbitraty high value. Reported-by: Rohan Deshpande <[email protected]> Signed-off-by: Naveen N. Rao <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/187fed5843cecc1e5066677b6296ee88337d7bef.1669096083.git.naveen.n.rao@linux.vnet.ibm.com
2022-11-30selftests/powerpc: Move perror closer to its useNaveen N. Rao1-16/+5
Right now, if perf_event_open() fails for the systemwide tests, error report is printed too late, sometimes after subsequent system calls. Move use of perror() to the main function, just after the syscall. Signed-off-by: Naveen N. Rao <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/372ac78c27899f1f612fbd6ac796604a4a9310aa.1669096083.git.naveen.n.rao@linux.vnet.ibm.com
2022-11-24selftests/powerpc: Remove repeated word in commentsShaomin Deng1-1/+1
Remove the repeated word "not" in comments. Signed-off-by: Shaomin Deng <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-11-24selftests/powerpc: Fix spelling mistake "mmaping" -> "mmapping"Colin Ian King1-1/+1
There is a spelling mistake in a perror message. Fix it. Signed-off-by: Colin Ian King <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-09-28selftests/powerpc: Update bhrb filter sampling test for multiple branch filtersAthira Rajeev1-0/+9
For PERF_SAMPLE_BRANCH_STACK sample type, different branch_sample_type, ie branch filters are supported. The testcase "bhrb_filter_map_test" tests the valid and invalid filter maps in different powerpc platforms. Update this testcase to include scenario to cover multiple branch filters at sametime. Since powerpc doesn't support multiple filters at sametime, expect failure during perf_event_open. Reported-by: Disha Goel <[email protected]> Signed-off-by: Athira Rajeev <[email protected]> Reviewed-by: Kajol Jain <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-09-04selftests/powerpc: Skip 4PB test on 4K PAGE_SIZE systemsMichael Ellerman1-0/+2
Systems using the hash MMU with a 4K page size don't support 4PB address space, so skip the test because the bug it tests for can't be triggered. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-08-26selftests/powerpc: Add a test for execute-only memoryNicholas Miehlbradt2-1/+233
This selftest is designed to cover execute-only protections on the Radix MMU but will also work with Hash. The tests are based on those found in pkey_exec_test with modifications to use the generic mprotect() instead of the pkey variants. Signed-off-by: Nicholas Miehlbradt <[email protected]> Signed-off-by: Russell Currey <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-08-22powerpc/selftests: Use timersub() for gettimeofday()ye xingchen1-2/+4
Use timersub() function to simplify the code. Reported-by: Zeal Robot <[email protected]> Signed-off-by: ye xingchen <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-08-15selftests/powerpc: Add missing PMU selftests to .gitignoresRussell Currey2-4/+34
Some recently added selftests don't have their binaries in .gitignores, so add them. I also alphabetically sorted sampling_tests/.gitignore while I was in there. Signed-off-by: Russell Currey <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-08-01selftests/powerpc: Avoid GCC 12 uninitialised variable warningMichael Ellerman1-0/+1
GCC 12 thinks that `actual` might be used uninitialised. It's not, the use is guarded by `bad_mmcr2` which is only set to true at the same point where `actual` is initialised. cycles_with_mmcr2_test.c: In function ‘cycles_with_mmcr2’: cycles_with_mmcr2_test.c:81:17: error: ‘actual’ may be used uninitialized [-Werror=maybe-uninitialized] 81 | printf("Bad MMCR2 value seen is 0x%lx\n", actual); Silence the warning by initialising `actual` to zero. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-28selftests/powerpc: Fix matrix multiply assist testRashmica Gupta1-0/+3
The ISA states: "when ACC[i] contains defined data, the contents of VSRs 4×i to 4×i+3 are undefined until either a VSX Move From ACC instruction is used to copy the contents of ACC[i] to VSRs 4×i to 4×i+3 or some other instruction directly writes to one of these VSRs." We aren't doing this. This test only works on Power10 because the hardware implementation happens to map ACC0 to VSRs 0-3, but will fail on any other implementation that doesn't do this. So add xxmfacc between writing to the accumulator and accessing the VSRs. Fixes: 3527e1ab9a79 ("selftests/powerpc: Add matrix multiply assist (MMA) test") Signed-off-by: Rashmica Gupta <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Add peek/poke of FPRsMichael Ellerman2-2/+87
Currently the ptrace-gpr test only tests the GET/SET(FP)REGS ptrace APIs. But there's an alternate (older) API, called PEEK/POKEUSR. Add some minimal testing of PEEK/POKEUSR of the FPRs. This is sufficient to detect the bug that was fixed recently in the 32-bit ptrace FPR handling. Depends-on: 8e1278444446 ("powerpc/32: Fix overread/overwrite of thread_struct via ptrace") Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Use more interesting valuesMichael Ellerman1-14/+57
The ptrace-gpr test uses fixed values to test that registers can be read/written via ptrace. In particular it sets all GPRs to 1, which means the test could miss some types of bugs - eg. if the kernel was only returning the low word. So generate some random values at startup and use those instead. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Make child errors more obviousMichael Ellerman1-8/+5
Use the FAIL_IF() macro so that errors in the child report a line number, rather than just silently exiting. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Do more of ptrace-gpr in asmMichael Ellerman4-17/+73
The ptrace-gpr test includes some inline asm to load GPR and FPR registers. It then goes back to C to wait for the parent to trace it and then checks register contents. The split between inline asm and C is fragile, it relies on the compiler not using any non-volatile GPRs after the inline asm block. It also requires a very large and unwieldy inline asm block. So convert the logic to set registers, wait, and store registers to a single asm function, meaning there's no window for the compiler to intervene. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Build the ptrace-gpr test as 32-bit when possibleMichael Ellerman1-2/+3
The ptrace-gpr test can now be built 32-bit, so do that if that's the compiler default rather than forcing a 64-bit build. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Convert to load/store doublesMichael Ellerman7-109/+111
Some of the ptrace tests check the contents of floating pointer registers. Currently these use float, which is always 4 bytes, but the ptrace API supports saving/restoring 8 bytes per register, so switch to using doubles to exercise the code more fully. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Drop unused load_fpr_single_precision()Michael Ellerman2-38/+0
This function is never called, drop it. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc: Add 32-bit support to asm helpersMichael Ellerman1-9/+38
Add support for 32-bit builds to the asm helpers. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc: Don't save TOC by default in asm helpersMichael Ellerman1-3/+1
Thare are some asm helpers for creating/popping stack frames in basic_asm.h. They always save/restore r2 (TOC pointer), but none of the selftests change r2, so it's unnecessary to save it by default. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc: Don't save CR by default in asm helpersMichael Ellerman1-4/+0
Thare are some asm helpers for creating/popping stack frames in basic_asm.h. They always save/restore CR, but none of the selftests tests touch non-volatile CR fields, so it's unnecessary to save them by default. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Split CFLAGS betterMichael Ellerman1-5/+28
Currently all ptrace tests are built 64-bit and with TM enabled. Only the TM tests need TM enabled, so split those out into a separate variable so that can be specified precisely. Split the rest of the tests into a variable, and add -m64 to CFLAGS for those tests, so that in a subsequent patch some tests can be made to build 32-bit. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc/ptrace: Set LOCAL_HDRSMichael Ellerman1-2/+3
Set LOCAL_HDRS so header changes cause rebuilds. The lib.mk logic adds all the headers in LOCAL_HDRS as dependencies, so there's no need to also list them explicitly. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-07-25selftests/powerpc: Ensure 16-byte stack pointer alignmentMichael Ellerman1-2/+2
The PUSH/POP_BASIC_STACK helpers in basic_asm.h do not ensure that the stack pointer is always 16-byte aligned, which is required per the ABI. Fix the macros to do the alignment if the caller fails to. Currently only one caller passes a non-aligned size, tm_signal_self(), which hasn't been caught in testing, presumably because it's a leaf function. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-06-29selftests/powerpc: Add missing files to .gitignoresMichael Ellerman4-0/+4
These were missed when the respective tests were added, add them now. Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2022-06-29selftests/powerpc/pmu: Add test for hardware cache eventsKajol Jain2-1/+90
The testcase checks if the transalation of a generic hardware cache event is done properly via perf interface. The hardware cache events has type as PERF_TYPE_HW_CACHE and each event points to raw event code id. Testcase checks different combination of cache level, cache event operation type and cache event result type and verify for a given event code, whether transalation matches with the current cache event mappings via perf interface. Signed-off-by: Kajol Jain <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
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