selftests/powerpc: Test TM and VMX register state (cde97f84) · Commits · 戴 / test

tools/testing/selftests/powerpc/tm/.gitignore

+1 −0

Original line number	Diff line number	Diff line
		@@ -11,3 +11,4 @@ tm-signal-context-chk-fpu
		tm-signal-context-chk-gpr
		tm-signal-context-chk-vmx
		tm-signal-context-chk-vsx
		tm-vmx-unavail

tools/testing/selftests/powerpc/tm/Makefile

+3 −1

Original line number	Diff line number	Diff line
		@@ -2,7 +2,8 @@ SIGNAL_CONTEXT_CHK_TESTS := tm-signal-context-chk-gpr tm-signal-context-chk-fpu
		tm-signal-context-chk-vmx tm-signal-context-chk-vsx

		TEST_GEN_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack \
		tm-vmxcopy tm-fork tm-tar tm-tmspr $(SIGNAL_CONTEXT_CHK_TESTS)
		tm-vmxcopy tm-fork tm-tar tm-tmspr tm-vmx-unavail \
		$(SIGNAL_CONTEXT_CHK_TESTS)

		include ../../lib.mk

		@@ -13,6 +14,7 @@ CFLAGS += -mhtm
		$(OUTPUT)/tm-syscall: tm-syscall-asm.S
		$(OUTPUT)/tm-syscall: CFLAGS += -I../../../../../usr/include
		$(OUTPUT)/tm-tmspr: CFLAGS += -pthread
		$(OUTPUT)/tm-vmx-unavail: CFLAGS += -pthread -m64

		SIGNAL_CONTEXT_CHK_TESTS := $(patsubst %,$(OUTPUT)/%,$(SIGNAL_CONTEXT_CHK_TESTS))
		$(SIGNAL_CONTEXT_CHK_TESTS): tm-signal.S

tools/testing/selftests/powerpc/tm/tm-vmx-unavail.c

0 → 100644

+118 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2017, Michael Neuling, IBM Corp.
		* Licensed under GPLv2.
		* Original: Breno Leitao <brenohl@br.ibm.com> &
		* Gustavo Bueno Romero <gromero@br.ibm.com>
		* Edited: Michael Neuling
		*
		* Force VMX unavailable during a transaction and see if it corrupts
		* the checkpointed VMX register state after the abort.
		*/

		#include <inttypes.h>
		#include <htmintrin.h>
		#include <string.h>
		#include <stdlib.h>
		#include <stdio.h>
		#include <pthread.h>
		#include <sys/mman.h>
		#include <unistd.h>
		#include <pthread.h>

		#include "tm.h"
		#include "utils.h"

		int passed;

		void worker(void unused)
		{
		__int128 vmx0;
		uint64_t texasr;

		asm goto (
		"li 3, 1;" /* Stick non-zero value in VMX0 */
		"std 3, 0(%[vmx0_ptr]);"
		"lvx 0, 0, %[vmx0_ptr];"

		/* Wait here a bit so we get scheduled out 255 times */
		"lis 3, 0x3fff;"
		"1: ;"
		"addi 3, 3, -1;"
		"cmpdi 3, 0;"
		"bne 1b;"

		/* Kernel will hopefully turn VMX off now */

		"tbegin. ;"
		"beq failure;"

		/* Cause VMX unavail. Any VMX instruction */
		"vaddcuw 0,0,0;"

		"tend. ;"
		"b %l[success];"

		/* Check VMX0 sanity after abort */
		"failure: ;"
		"lvx 1, 0, %[vmx0_ptr];"
		"vcmpequb. 2, 0, 1;"
		"bc 4, 24, %l[value_mismatch];"
		"b %l[value_match];"
		:
		: [vmx0_ptr] "r"(&vmx0)
		: "r3"
		: success, value_match, value_mismatch
		);

		/* HTM aborted and VMX0 is corrupted */
		value_mismatch:
		texasr = __builtin_get_texasr();

		printf("\n\n==============\n\n");
		printf("Failure with error: %lx\n", _TEXASR_FAILURE_CODE(texasr));
		printf("Summary error : %lx\n", _TEXASR_FAILURE_SUMMARY(texasr));
		printf("TFIAR exact : %lx\n\n", _TEXASR_TFIAR_EXACT(texasr));

		passed = 0;
		return NULL;

		/* HTM aborted but VMX0 is correct */
		value_match:
		// printf("!");
		return NULL;

		success:
		// printf(".");
		return NULL;
		}

		int tm_vmx_unavail_test()
		{
		int threads;
		pthread_t *thread;

		SKIP_IF(!have_htm());

		passed = 1;

		threads = sysconf(_SC_NPROCESSORS_ONLN) * 4;
		thread = malloc(sizeof(pthread_t)*threads);
		if (!thread)
		return EXIT_FAILURE;

		for (uint64_t i = 0; i < threads; i++)
		pthread_create(&thread[i], NULL, &worker, NULL);

		for (uint64_t i = 0; i < threads; i++)
		pthread_join(thread[i], NULL);

		free(thread);

		return passed ? EXIT_SUCCESS : EXIT_FAILURE;
		}


		int main(int argc, char **argv)
		{
		return test_harness(tm_vmx_unavail_test, "tm_vmx_unavail_test");
		}

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