diff options
Diffstat (limited to 'tools/testing/selftests/arm64/fp/zt-test.S')
| -rw-r--r-- | tools/testing/selftests/arm64/fp/zt-test.S | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/tools/testing/selftests/arm64/fp/zt-test.S b/tools/testing/selftests/arm64/fp/zt-test.S index d63286397638..a8df05771670 100644 --- 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 @@ -267,6 +264,8 @@ function barf // mov w8, #__NR_exit // svc #0 // end hack + + mrs x13, S3_3_C4_C2_2 smstop mov x10, x0 // expected data mov x11, x1 // actual data @@ -277,7 +276,7 @@ function barf bl putdec puts ", iteration=" mov x0, x22 - bl putdec + bl putdecn puts "\tExpected [" mov x0, x10 mov x1, x12 @@ -287,6 +286,9 @@ function barf mov x1, x12 bl dumphex puts "]\n" + puts "\tSVCR: " + mov x0, x13 + bl putdecn mov x8, #__NR_getpid svc #0 |