rseq/selftests: Implement MIPS support (744f4be5) · Commits · 戴 / test

Implement support for both MIPS32 & MIPS64 in the rseq selftests, in order to sanity check the recently enabled rseq syscall. The tests all pass on a MIPS Boston development board running either a MIPS32r2 interAptiv CPU & a MIPS64r6 I6500 CPU, both of which were configured with 2 cores each of which have 2 hardware threads (VP(E)s) - ie. 4 CPUs. Signed-off-by:

Paul Burton <paul.burton@mips.com> Reviewed-by:

James Hogan <jhogan@kernel.org> Patchwork: https://patchwork.linux-mips.org/patch/19524/ Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org

tools/testing/selftests/rseq/param_test.c

+24 −0

Original line number	Diff line number	Diff line
		@@ -137,6 +137,30 @@ unsigned int yield_mod_cnt, nr_abort;
		"subic. %%" INJECT_ASM_REG ", %%" INJECT_ASM_REG ", 1\n\t" \
		"bne 222b\n\t" \
		"333:\n\t"

		#elif defined(__mips__)

		#define RSEQ_INJECT_INPUT \
		, [loop_cnt_1]"m"(loop_cnt[1]) \
		, [loop_cnt_2]"m"(loop_cnt[2]) \
		, [loop_cnt_3]"m"(loop_cnt[3]) \
		, [loop_cnt_4]"m"(loop_cnt[4]) \
		, [loop_cnt_5]"m"(loop_cnt[5]) \
		, [loop_cnt_6]"m"(loop_cnt[6])

		#define INJECT_ASM_REG "$5"

		#define RSEQ_INJECT_CLOBBER \
		, INJECT_ASM_REG

		#define RSEQ_INJECT_ASM(n) \
		"lw " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
		"beqz " INJECT_ASM_REG ", 333f\n\t" \
		"222:\n\t" \
		"addiu " INJECT_ASM_REG ", -1\n\t" \
		"bnez " INJECT_ASM_REG ", 222b\n\t" \
		"333:\n\t"

		#else
		#error unsupported target
		#endif

tools/testing/selftests/rseq/rseq-mips.h

0 → 100644

+725 −0

File added.

Preview size limit exceeded, changes collapsed.

tools/testing/selftests/rseq/rseq.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -73,6 +73,8 @@ extern __thread volatile struct rseq __rseq_abi;
		#include <rseq-arm.h>
		#elif defined(__PPC__)
		#include <rseq-ppc.h>
		#elif defined(__mips__)
		#include <rseq-mips.h>
		#else
		#error unsupported target
		#endif

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