Commit 05a5980f authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

kselftest/arm64: Count SIGUSR2 deliveries in FP stress tests 



Currently the floating point stress tests mostly support testing that the
data they are checking can be disrupted from a signal handler triggered by
SIGUSR1. This is not properly implemented for all the tests and in testing
is frequently modified to just handle the signal without corrupting data in
order to ensure that signal handling does not corrupt data. Directly support
this usage by installing a SIGUSR2 handler which simply counts the signal
delivery.

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220829154452.824870-3-broonie@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 9e40e627

tools/testing/selftests/arm64/fp/asm-offsets.h

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
#define sa_handler 0

#define sa_mask_sz 8

#define SIGUSR1 10

#define SIGUSR2 12

#define SIGTERM 15

#define SIGINT 2

#define SIGABRT 6

tools/testing/selftests/arm64/fp/fpsimd-test.S

+15 −0
Original line number Diff line number Diff line
@@ -151,6 +151,15 @@ function irritator_handler 
	ret

endfunction



function tickle_handler

	// Increment the signal count (x23):

	ldr	x0, [x2, #ucontext_regs + 8 * 23]

	add	x0, x0, #1

	str	x0, [x2, #ucontext_regs + 8 * 23]



	ret

endfunction



function terminate_handler

	mov	w21, w0

	mov	x20, x2
@@ -255,6 +264,12 @@ _start: 
	orr	w2, w2, #SA_NODEFER

	bl	setsignal



	mov	w0, #SIGUSR2

	adr	x1, tickle_handler

	mov	w2, #SA_SIGINFO

	orr	w2, w2, #SA_NODEFER

	bl	setsignal



	mov	x22, #0		// generation number, increments per iteration

.Ltest_loop:

tools/testing/selftests/arm64/fp/sve-test.S

+15 −0
Original line number Diff line number Diff line
@@ -314,6 +314,15 @@ function irritator_handler 
	ret

endfunction



function tickle_handler

	// Increment the signal count (x23):

	ldr	x0, [x2, #ucontext_regs + 8 * 23]

	add	x0, x0, #1

	str	x0, [x2, #ucontext_regs + 8 * 23]



	ret

endfunction



function terminate_handler

	mov	w21, w0

	mov	x20, x2
@@ -423,6 +432,12 @@ _start: 
	orr	w2, w2, #SA_NODEFER

	bl	setsignal



	mov	w0, #SIGUSR2

	adr	x1, tickle_handler

	mov	w2, #SA_SIGINFO

	orr	w2, w2, #SA_NODEFER

	bl	setsignal



#ifdef SSVE

	smstart_sm		// syscalls will have exited streaming mode

#endif

tools/testing/selftests/arm64/fp/za-test.S

+15 −0
Original line number Diff line number Diff line
@@ -167,6 +167,15 @@ function irritator_handler 
	ret

endfunction



function tickle_handler

	// Increment the signal count (x23):

	ldr	x0, [x2, #ucontext_regs + 8 * 23]

	add	x0, x0, #1

	str	x0, [x2, #ucontext_regs + 8 * 23]



	ret

endfunction



function terminate_handler

	mov	w21, w0

	mov	x20, x2
@@ -273,6 +282,12 @@ _start: 
	orr	w2, w2, #SA_NODEFER

	bl	setsignal



	mov	w0, #SIGUSR2

	adr	x1, tickle_handler

	mov	w2, #SA_SIGINFO

	orr	w2, w2, #SA_NODEFER

	bl	setsignal



	mov	x22, #0		// generation number, increments per iteration

.Ltest_loop:

	rdsvl	0, 8