Merge branches 'for-next/gcs', 'for-next/probes', 'for-next/asm-offsets', 'for-next...

[linux.git] / tools / testing / selftests / arm64 / fp / zt-test.S

diff --git a/tools/testing/selftests/arm64/fp/zt-test.S b/tools/testing/selftests/arm64/fp/zt-test.S
index b5c81e81a37946c1bffe810568855939e9ceb08e..38080f3c328042af6b3e2d7c3300162ea6efa4ea 100644 (file)
--- a/tools/testing/selftests/arm64/fp/zt-test.S
+++ b/tools/testing/selftests/arm64/fp/zt-test.S
@@ -117,21 +117,16 @@ function check_zt
        b       memcmp
 endfunction
 
-// Any SME register modified here can cause corruption in the main
-// thread -- but *only* the locations modified here.
+// Modify the live SME register state, signal return will undo our changes
 function irritator_handler
        // Increment the irritation signal count (x23):
        ldr     x0, [x2, #ucontext_regs + 8 * 23]
        add     x0, x0, #1
        str     x0, [x2, #ucontext_regs + 8 * 23]
 
-       // Corrupt some random ZT data
-#if 0
-       adr     x0, .text + (irritator_handler - .text) / 16 * 16
-       movi    v0.8b, #1
-       movi    v9.16b, #2
-       movi    v31.8b, #3
-#endif
+       // This will reset ZT to all bits 0
+       smstop
+       smstart_za
 
        ret
 endfunction
@@ -200,6 +195,8 @@ endfunction
 // Main program entry point
 .globl _start
 function _start
+       enable_gcs
+
        mov     x23, #0         // signal count
 
        mov     w0, #SIGINT