From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Shuah Khan <shuah@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>, Oliver Upton <oupton@kernel.org>,
Fuad Tabba <fuad.tabba@linux.dev>,
Mark Rutland <mark.rutland@arm.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org, Mark Brown <broonie@kernel.org>
Subject: [PATCH 01/11] kselftest/arm64: Factor Linux syscalls out of asm-utils.S
Date: Tue, 01 Sep 2026 18:06:41 +0100 [thread overview]
Message-ID: <20260901-arm64-fp-stress-kvm-v1-1-31bce995b49b@kernel.org> (raw)
In-Reply-To: <20260901-arm64-fp-stress-kvm-v1-0-31bce995b49b@kernel.org>
In preparation for building versions of the load programs for fp-stress
that run as KVM guests move the functions that perform syscalls out of
the shared code assembly code in asm-utils.S into a new Linux specific
file asm-utils-linux.S.
No functional change.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
tools/testing/selftests/arm64/fp/Makefile | 17 +++++----
tools/testing/selftests/arm64/fp/asm-utils-linux.S | 43 ++++++++++++++++++++++
tools/testing/selftests/arm64/fp/asm-utils.S | 36 ------------------
3 files changed, 53 insertions(+), 43 deletions(-)
diff --git a/tools/testing/selftests/arm64/fp/Makefile b/tools/testing/selftests/arm64/fp/Makefile
index d171021e4cdd..183e9d319b65 100644
--- a/tools/testing/selftests/arm64/fp/Makefile
+++ b/tools/testing/selftests/arm64/fp/Makefile
@@ -22,21 +22,24 @@ TEST_GEN_PROGS_EXTENDED := fp-pidbench fpsimd-test \
vlset
TEST_PROGS_EXTENDED := fpsimd-stress sve-stress ssve-stress za-stress
-EXTRA_CLEAN += $(OUTPUT)/asm-utils.o $(OUTPUT)/rdvl.o $(OUTPUT)/za-fork-asm.o
+EXTRA_CLEAN += $(OUTPUT)/asm-utils.o $(OUTPUT)/asm-utils-linux.o \
+ $(OUTPUT)/rdvl.o $(OUTPUT)/za-fork-asm.o
+
+ASM_UTILS := $(OUTPUT)/asm-utils.o $(OUTPUT)/asm-utils-linux.o
# Build with nolibc to avoid effects due to libc's clone() support
-$(OUTPUT)/fp-pidbench: fp-pidbench.S $(OUTPUT)/asm-utils.o
+$(OUTPUT)/fp-pidbench: fp-pidbench.S $(ASM_UTILS)
$(CC) -nostdlib $^ -o $@
$(OUTPUT)/fp-ptrace: fp-ptrace.c fp-ptrace-asm.S
-$(OUTPUT)/fpsimd-test: fpsimd-test.S $(OUTPUT)/asm-utils.o
+$(OUTPUT)/fpsimd-test: fpsimd-test.S $(ASM_UTILS)
$(CC) -nostdlib $^ -o $@
$(OUTPUT)/rdvl-sve: rdvl-sve.c $(OUTPUT)/rdvl.o
$(OUTPUT)/rdvl-sme: rdvl-sme.c $(OUTPUT)/rdvl.o
$(OUTPUT)/sve-ptrace: sve-ptrace.c
$(OUTPUT)/sve-probe-vls: sve-probe-vls.c $(OUTPUT)/rdvl.o
-$(OUTPUT)/sve-test: sve-test.S $(OUTPUT)/asm-utils.o
+$(OUTPUT)/sve-test: sve-test.S $(ASM_UTILS)
$(CC) -nostdlib $^ -o $@
-$(OUTPUT)/ssve-test: sve-test.S $(OUTPUT)/asm-utils.o
+$(OUTPUT)/ssve-test: sve-test.S $(ASM_UTILS)
$(CC) -DSSVE -nostdlib $^ -o $@
$(OUTPUT)/vec-syscfg: vec-syscfg.c $(OUTPUT)/rdvl.o
$(OUTPUT)/vlset: vlset.c
@@ -45,10 +48,10 @@ $(OUTPUT)/za-fork: za-fork.c $(OUTPUT)/za-fork-asm.o
-include ../../../../include/nolibc/nolibc.h -I../..\
-static -ffreestanding -Wall $^ -o $@
$(OUTPUT)/za-ptrace: za-ptrace.c
-$(OUTPUT)/za-test: za-test.S $(OUTPUT)/asm-utils.o
+$(OUTPUT)/za-test: za-test.S $(ASM_UTILS)
$(CC) -nostdlib $^ -o $@
$(OUTPUT)/zt-ptrace: zt-ptrace.c
-$(OUTPUT)/zt-test: zt-test.S $(OUTPUT)/asm-utils.o
+$(OUTPUT)/zt-test: zt-test.S $(ASM_UTILS)
$(CC) -nostdlib $^ -o $@
include ../../lib.mk
diff --git a/tools/testing/selftests/arm64/fp/asm-utils-linux.S b/tools/testing/selftests/arm64/fp/asm-utils-linux.S
new file mode 100644
index 000000000000..e6c22b41dc5e
--- /dev/null
+++ b/tools/testing/selftests/arm64/fp/asm-utils-linux.S
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (C) 2015-2021 ARM Limited.
+// Original author: Dave Martin <Dave.Martin@arm.com>
+//
+// Utility functions for assembly code which use Linux syscalls.
+
+#include <asm/unistd.h>
+#include "assembler.h"
+
+// Print a single character x0 to stdout
+// Clobbers x0-x2,x8
+function putc
+ str x0, [sp, #-16]!
+
+ mov x0, #1 // STDOUT_FILENO
+ mov x1, sp
+ mov x2, #1
+ mov x8, #__NR_write
+ svc #0
+
+ add sp, sp, #16
+ ret
+endfunction
+.globl putc
+
+// Print a NUL-terminated string starting at address x0 to stdout
+// Clobbers x0-x3,x8
+function puts
+ mov x1, x0
+
+ mov x2, #0
+0: ldrb w3, [x0], #1
+ cbz w3, 1f
+ add x2, x2, #1
+ b 0b
+
+1: mov w0, #1 // STDOUT_FILENO
+ mov x8, #__NR_write
+ svc #0
+
+ ret
+endfunction
+.globl puts
diff --git a/tools/testing/selftests/arm64/fp/asm-utils.S b/tools/testing/selftests/arm64/fp/asm-utils.S
index 4b9728efc18d..6d43eb10e01f 100644
--- a/tools/testing/selftests/arm64/fp/asm-utils.S
+++ b/tools/testing/selftests/arm64/fp/asm-utils.S
@@ -4,44 +4,8 @@
//
// Utility functions for assembly code.
-#include <asm/unistd.h>
#include "assembler.h"
-// Print a single character x0 to stdout
-// Clobbers x0-x2,x8
-function putc
- str x0, [sp, #-16]!
-
- mov x0, #1 // STDOUT_FILENO
- mov x1, sp
- mov x2, #1
- mov x8, #__NR_write
- svc #0
-
- add sp, sp, #16
- ret
-endfunction
-.globl putc
-
-// Print a NUL-terminated string starting at address x0 to stdout
-// Clobbers x0-x3,x8
-function puts
- mov x1, x0
-
- mov x2, #0
-0: ldrb w3, [x0], #1
- cbz w3, 1f
- add x2, x2, #1
- b 0b
-
-1: mov w0, #1 // STDOUT_FILENO
- mov x8, #__NR_write
- svc #0
-
- ret
-endfunction
-.globl puts
-
// Print an unsigned decimal number x0 to stdout
// Clobbers x0-x4,x8
function putdec
--
2.47.3
next prev parent reply other threads:[~2026-09-01 17:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 17:06 [PATCH 00/11] kselftest/arm64: Add coverage of interactions with KVM to fp-stress Mark Brown
2026-09-01 17:06 ` Mark Brown [this message]
2026-09-01 17:06 ` [PATCH 02/11] kselftest/arm64: Factor shared signal handlers out of fp-stress loads Mark Brown
2026-09-01 17:06 ` [PATCH 03/11] kselftest/arm64: Move exit calls " Mark Brown
2026-09-01 17:06 ` [PATCH 04/11] kselftest/arm64: Use exit_error() rather than SIGABRT in fp-stress Mark Brown
2026-09-01 17:06 ` [PATCH 05/11] kselftest/arm64: Exit with an error code on data mismatches " Mark Brown
2026-09-01 17:06 ` [PATCH 06/11] kselftest/arm64: Factor startup code out of fp-stress load programs Mark Brown
2026-09-01 17:06 ` [PATCH 07/11] kselftest/arm64: Remove the sched_yield()s from the fp-stress loads Mark Brown
2026-09-01 17:06 ` [PATCH 08/11] kselftest/arm64: Add a very simple VMM for use in fp-stress Mark Brown
2026-09-01 17:06 ` [PATCH 09/11] kselftest/arm64: Build KVM guest versions of the fp-stress loads Mark Brown
2026-09-01 17:06 ` [PATCH 10/11] kselftest/arm64: Use execv() to start fp-stress test loads Mark Brown
2026-09-01 17:06 ` [PATCH 11/11] kselftest/arm64: Run KVM guests from fp-stress Mark Brown
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