From: Michael Ellerman <mpe@ellerman.id.au>
To: <linuxppc-dev@lists.ozlabs.org>
Subject: [PATCH 04/13] selftests/powerpc: Don't save CR by default in asm helpers
Date: Tue, 28 Jun 2022 00:02:30 +1000 [thread overview]
Message-ID: <20220627140239.2464900-4-mpe@ellerman.id.au> (raw)
In-Reply-To: <20220627140239.2464900-1-mpe@ellerman.id.au>
Thare are some asm helpers for creating/popping stack frames in
basic_asm.h. They always save/restore CR, but none of the selftests
tests touch non-volatile CR fields, so it's unnecessary to save them by
default.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
tools/testing/selftests/powerpc/include/basic_asm.h | 4 ----
1 file changed, 4 deletions(-)
diff --git a/tools/testing/selftests/powerpc/include/basic_asm.h b/tools/testing/selftests/powerpc/include/basic_asm.h
index 807e83e821ec..faec7b11c041 100644
--- a/tools/testing/selftests/powerpc/include/basic_asm.h
+++ b/tools/testing/selftests/powerpc/include/basic_asm.h
@@ -59,14 +59,10 @@
mflr r0; \
std r0, STACK_FRAME_LR_POS(%r1); \
stdu %r1, -(((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE)(%r1); \
- mfcr r0; \
- stw r0, STACK_FRAME_CR_POS(%r1); \
std %r2, STACK_FRAME_TOC_POS(%r1);
#define POP_BASIC_STACK(_extra) \
ld %r2, STACK_FRAME_TOC_POS(%r1); \
- lwz r0, STACK_FRAME_CR_POS(%r1); \
- mtcr r0; \
addi %r1, %r1, (((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE); \
ld r0, STACK_FRAME_LR_POS(%r1); \
mtlr r0;
--
2.35.3
next prev parent reply other threads:[~2022-06-27 14:04 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-27 14:02 [PATCH 01/13] selftests/powerpc: Ensure 16-byte stack pointer alignment Michael Ellerman
2022-06-27 14:02 ` [PATCH 02/13] selftests/powerpc/ptrace: Set LOCAL_HDRS Michael Ellerman
2022-06-27 14:02 ` [PATCH 03/13] selftests/powerpc/ptrace: Split CFLAGS better Michael Ellerman
2022-06-27 14:02 ` Michael Ellerman [this message]
2022-06-27 14:02 ` [PATCH 05/13] selftests/powerpc: Don't save TOC by default in asm helpers Michael Ellerman
2022-06-27 14:02 ` [PATCH 06/13] selftests/powerpc: Add 32-bit support to " Michael Ellerman
2022-06-27 14:02 ` [PATCH 07/13] selftests/powerpc/ptrace: Drop unused load_fpr_single_precision() Michael Ellerman
2022-06-27 14:02 ` [PATCH 08/13] selftests/powerpc/ptrace: Convert to load/store doubles Michael Ellerman
2022-06-27 14:02 ` [PATCH 09/13] selftests/powerpc/ptrace: Build the ptrace-gpr test as 32-bit when possible Michael Ellerman
2022-06-27 14:02 ` [PATCH 10/13] selftests/powerpc/ptrace: Do more of ptrace-gpr in asm Michael Ellerman
2022-06-27 14:02 ` [PATCH 11/13] selftests/powerpc/ptrace: Make child errors more obvious Michael Ellerman
2022-06-27 14:02 ` [PATCH 12/13] selftests/powerpc/ptrace: Use more interesting values Michael Ellerman
2022-06-27 14:02 ` [PATCH 13/13] selftests/powerpc/ptrace: Add peek/poke of FPRs Michael Ellerman
2022-07-29 13:02 ` [PATCH 01/13] selftests/powerpc: Ensure 16-byte stack pointer alignment Michael Ellerman
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