From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- tools/testing/selftests/arm64/fp/za-fork-asm.S | 61 ++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 tools/testing/selftests/arm64/fp/za-fork-asm.S (limited to 'tools/testing/selftests/arm64/fp/za-fork-asm.S') diff --git a/tools/testing/selftests/arm64/fp/za-fork-asm.S b/tools/testing/selftests/arm64/fp/za-fork-asm.S new file mode 100644 index 000000000..2fafadd49 --- /dev/null +++ b/tools/testing/selftests/arm64/fp/za-fork-asm.S @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (C) 2021 ARM Limited. + +#include "sme-inst.h" + +.arch_extension sve + +#define MAGIC 42 + +#define MAXVL 2048 +#define MAXVL_B (MAXVL / 8) + +.pushsection .text +.data +.align 4 +scratch: + .space MAXVL_B +.popsection + +.globl fork_test +fork_test: + smstart_za + + // For simplicity just set one word in one vector, other tests + // cover general data corruption issues. + ldr x0, =scratch + mov x1, #MAGIC + str x1, [x0] + mov w12, wzr + _ldr_za 12, 0 // ZA.H[W12] loaded from [X0] + + // Tail call into the C portion that does the fork & verify + b fork_test_c + +.globl verify_fork +verify_fork: + // SVCR should have ZA=1, SM=0 + mrs x0, S3_3_C4_C2_2 + and x1, x0, #3 + cmp x1, #2 + beq 1f + mov x0, xzr + b 100f +1: + + // ZA should still have the value we loaded + ldr x0, =scratch + mov w12, wzr + _str_za 12, 0 // ZA.H[W12] stored to [X0] + ldr x1, [x0] + cmp x1, #MAGIC + beq 2f + mov x0, xzr + b 100f + +2: + // All tests passed + mov x0, #1 +100: + ret + -- cgit v1.2.3