From: guoren@kernel.org
To: arnd@arndb.de, guoren@kernel.org, palmer@rivosinc.com,
tglx@linutronix.de, peterz@infradead.org, luto@kernel.org,
conor.dooley@microchip.com, heiko@sntech.de, jszhang@kernel.org,
lazyparser@gmail.com, falcon@tinylab.org, chenhuacai@kernel.org,
apatel@ventanamicro.com, atishp@atishpatra.org,
mark.rutland@arm.com, ben@decadent.org.uk, bjorn@kernel.org,
palmer@dabbelt.com
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org,
"Björn Töpel" <bjorn@rivosinc.com>
Subject: [PATCH -next V17 7/7] riscv: entry: Consolidate general regs saving/restoring
Date: Tue, 21 Feb 2023 22:30:21 -0500 [thread overview]
Message-ID: <20230222033021.983168-8-guoren@kernel.org> (raw)
In-Reply-To: <20230222033021.983168-1-guoren@kernel.org>
From: Jisheng Zhang <jszhang@kernel.org>
Consolidate the saving/restoring GPs (except zero, ra, sp, gp,
tp and t0) into save_from_x6_to_x31/restore_from_x6_to_x31 macros.
No functional change intended.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Guo Ren <guoren@kernel.org>
---
arch/riscv/include/asm/asm.h | 61 +++++++++++++++++++++++++
arch/riscv/kernel/entry.S | 81 ++--------------------------------
arch/riscv/kernel/mcount-dyn.S | 57 ++----------------------
3 files changed, 68 insertions(+), 131 deletions(-)
diff --git a/arch/riscv/include/asm/asm.h b/arch/riscv/include/asm/asm.h
index 816e753de636..114bbadaef41 100644
--- a/arch/riscv/include/asm/asm.h
+++ b/arch/riscv/include/asm/asm.h
@@ -69,6 +69,7 @@
#endif
#ifdef __ASSEMBLY__
+#include <asm/asm-offsets.h>
/* Common assembly source macros */
@@ -81,6 +82,66 @@
.endr
.endm
+ /* save all GPs except x1 ~ x5 */
+ .macro save_from_x6_to_x31
+ REG_S x6, PT_T1(sp)
+ REG_S x7, PT_T2(sp)
+ REG_S x8, PT_S0(sp)
+ REG_S x9, PT_S1(sp)
+ REG_S x10, PT_A0(sp)
+ REG_S x11, PT_A1(sp)
+ REG_S x12, PT_A2(sp)
+ REG_S x13, PT_A3(sp)
+ REG_S x14, PT_A4(sp)
+ REG_S x15, PT_A5(sp)
+ REG_S x16, PT_A6(sp)
+ REG_S x17, PT_A7(sp)
+ REG_S x18, PT_S2(sp)
+ REG_S x19, PT_S3(sp)
+ REG_S x20, PT_S4(sp)
+ REG_S x21, PT_S5(sp)
+ REG_S x22, PT_S6(sp)
+ REG_S x23, PT_S7(sp)
+ REG_S x24, PT_S8(sp)
+ REG_S x25, PT_S9(sp)
+ REG_S x26, PT_S10(sp)
+ REG_S x27, PT_S11(sp)
+ REG_S x28, PT_T3(sp)
+ REG_S x29, PT_T4(sp)
+ REG_S x30, PT_T5(sp)
+ REG_S x31, PT_T6(sp)
+ .endm
+
+ /* restore all GPs except x1 ~ x5 */
+ .macro restore_from_x6_to_x31
+ REG_L x6, PT_T1(sp)
+ REG_L x7, PT_T2(sp)
+ REG_L x8, PT_S0(sp)
+ REG_L x9, PT_S1(sp)
+ REG_L x10, PT_A0(sp)
+ REG_L x11, PT_A1(sp)
+ REG_L x12, PT_A2(sp)
+ REG_L x13, PT_A3(sp)
+ REG_L x14, PT_A4(sp)
+ REG_L x15, PT_A5(sp)
+ REG_L x16, PT_A6(sp)
+ REG_L x17, PT_A7(sp)
+ REG_L x18, PT_S2(sp)
+ REG_L x19, PT_S3(sp)
+ REG_L x20, PT_S4(sp)
+ REG_L x21, PT_S5(sp)
+ REG_L x22, PT_S6(sp)
+ REG_L x23, PT_S7(sp)
+ REG_L x24, PT_S8(sp)
+ REG_L x25, PT_S9(sp)
+ REG_L x26, PT_S10(sp)
+ REG_L x27, PT_S11(sp)
+ REG_L x28, PT_T3(sp)
+ REG_L x29, PT_T4(sp)
+ REG_L x30, PT_T5(sp)
+ REG_L x31, PT_T6(sp)
+ .endm
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_RISCV_ASM_H */
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S
index 5ccef259498d..3fbb100bc9e4 100644
--- a/arch/riscv/kernel/entry.S
+++ b/arch/riscv/kernel/entry.S
@@ -42,32 +42,7 @@ _save_context:
REG_S x1, PT_RA(sp)
REG_S x3, PT_GP(sp)
REG_S x5, PT_T0(sp)
- REG_S x6, PT_T1(sp)
- REG_S x7, PT_T2(sp)
- REG_S x8, PT_S0(sp)
- REG_S x9, PT_S1(sp)
- REG_S x10, PT_A0(sp)
- REG_S x11, PT_A1(sp)
- REG_S x12, PT_A2(sp)
- REG_S x13, PT_A3(sp)
- REG_S x14, PT_A4(sp)
- REG_S x15, PT_A5(sp)
- REG_S x16, PT_A6(sp)
- REG_S x17, PT_A7(sp)
- REG_S x18, PT_S2(sp)
- REG_S x19, PT_S3(sp)
- REG_S x20, PT_S4(sp)
- REG_S x21, PT_S5(sp)
- REG_S x22, PT_S6(sp)
- REG_S x23, PT_S7(sp)
- REG_S x24, PT_S8(sp)
- REG_S x25, PT_S9(sp)
- REG_S x26, PT_S10(sp)
- REG_S x27, PT_S11(sp)
- REG_S x28, PT_T3(sp)
- REG_S x29, PT_T4(sp)
- REG_S x30, PT_T5(sp)
- REG_S x31, PT_T6(sp)
+ save_from_x6_to_x31
/*
* Disable user-mode memory access as it should only be set in the
@@ -182,32 +157,7 @@ SYM_CODE_START_NOALIGN(ret_from_exception)
REG_L x3, PT_GP(sp)
REG_L x4, PT_TP(sp)
REG_L x5, PT_T0(sp)
- REG_L x6, PT_T1(sp)
- REG_L x7, PT_T2(sp)
- REG_L x8, PT_S0(sp)
- REG_L x9, PT_S1(sp)
- REG_L x10, PT_A0(sp)
- REG_L x11, PT_A1(sp)
- REG_L x12, PT_A2(sp)
- REG_L x13, PT_A3(sp)
- REG_L x14, PT_A4(sp)
- REG_L x15, PT_A5(sp)
- REG_L x16, PT_A6(sp)
- REG_L x17, PT_A7(sp)
- REG_L x18, PT_S2(sp)
- REG_L x19, PT_S3(sp)
- REG_L x20, PT_S4(sp)
- REG_L x21, PT_S5(sp)
- REG_L x22, PT_S6(sp)
- REG_L x23, PT_S7(sp)
- REG_L x24, PT_S8(sp)
- REG_L x25, PT_S9(sp)
- REG_L x26, PT_S10(sp)
- REG_L x27, PT_S11(sp)
- REG_L x28, PT_T3(sp)
- REG_L x29, PT_T4(sp)
- REG_L x30, PT_T5(sp)
- REG_L x31, PT_T6(sp)
+ restore_from_x6_to_x31
REG_L x2, PT_SP(sp)
@@ -287,32 +237,7 @@ restore_caller_reg:
REG_S x1, PT_RA(sp)
REG_S x3, PT_GP(sp)
REG_S x5, PT_T0(sp)
- REG_S x6, PT_T1(sp)
- REG_S x7, PT_T2(sp)
- REG_S x8, PT_S0(sp)
- REG_S x9, PT_S1(sp)
- REG_S x10, PT_A0(sp)
- REG_S x11, PT_A1(sp)
- REG_S x12, PT_A2(sp)
- REG_S x13, PT_A3(sp)
- REG_S x14, PT_A4(sp)
- REG_S x15, PT_A5(sp)
- REG_S x16, PT_A6(sp)
- REG_S x17, PT_A7(sp)
- REG_S x18, PT_S2(sp)
- REG_S x19, PT_S3(sp)
- REG_S x20, PT_S4(sp)
- REG_S x21, PT_S5(sp)
- REG_S x22, PT_S6(sp)
- REG_S x23, PT_S7(sp)
- REG_S x24, PT_S8(sp)
- REG_S x25, PT_S9(sp)
- REG_S x26, PT_S10(sp)
- REG_S x27, PT_S11(sp)
- REG_S x28, PT_T3(sp)
- REG_S x29, PT_T4(sp)
- REG_S x30, PT_T5(sp)
- REG_S x31, PT_T6(sp)
+ save_from_x6_to_x31
REG_L s0, TASK_TI_KERNEL_SP(tp)
csrr s1, CSR_STATUS
diff --git a/arch/riscv/kernel/mcount-dyn.S b/arch/riscv/kernel/mcount-dyn.S
index 125de818d1ba..669b8697aa38 100644
--- a/arch/riscv/kernel/mcount-dyn.S
+++ b/arch/riscv/kernel/mcount-dyn.S
@@ -66,66 +66,17 @@
REG_S x3, PT_GP(sp)
REG_S x4, PT_TP(sp)
REG_S x5, PT_T0(sp)
- REG_S x6, PT_T1(sp)
- REG_S x7, PT_T2(sp)
- REG_S x8, PT_S0(sp)
- REG_S x9, PT_S1(sp)
- REG_S x10, PT_A0(sp)
- REG_S x11, PT_A1(sp)
- REG_S x12, PT_A2(sp)
- REG_S x13, PT_A3(sp)
- REG_S x14, PT_A4(sp)
- REG_S x15, PT_A5(sp)
- REG_S x16, PT_A6(sp)
- REG_S x17, PT_A7(sp)
- REG_S x18, PT_S2(sp)
- REG_S x19, PT_S3(sp)
- REG_S x20, PT_S4(sp)
- REG_S x21, PT_S5(sp)
- REG_S x22, PT_S6(sp)
- REG_S x23, PT_S7(sp)
- REG_S x24, PT_S8(sp)
- REG_S x25, PT_S9(sp)
- REG_S x26, PT_S10(sp)
- REG_S x27, PT_S11(sp)
- REG_S x28, PT_T3(sp)
- REG_S x29, PT_T4(sp)
- REG_S x30, PT_T5(sp)
- REG_S x31, PT_T6(sp)
+ save_from_x6_to_x31
.endm
.macro RESTORE_ALL
- REG_L t0, PT_EPC(sp)
REG_L x1, PT_RA(sp)
REG_L x2, PT_SP(sp)
REG_L x3, PT_GP(sp)
REG_L x4, PT_TP(sp)
- REG_L x6, PT_T1(sp)
- REG_L x7, PT_T2(sp)
- REG_L x8, PT_S0(sp)
- REG_L x9, PT_S1(sp)
- REG_L x10, PT_A0(sp)
- REG_L x11, PT_A1(sp)
- REG_L x12, PT_A2(sp)
- REG_L x13, PT_A3(sp)
- REG_L x14, PT_A4(sp)
- REG_L x15, PT_A5(sp)
- REG_L x16, PT_A6(sp)
- REG_L x17, PT_A7(sp)
- REG_L x18, PT_S2(sp)
- REG_L x19, PT_S3(sp)
- REG_L x20, PT_S4(sp)
- REG_L x21, PT_S5(sp)
- REG_L x22, PT_S6(sp)
- REG_L x23, PT_S7(sp)
- REG_L x24, PT_S8(sp)
- REG_L x25, PT_S9(sp)
- REG_L x26, PT_S10(sp)
- REG_L x27, PT_S11(sp)
- REG_L x28, PT_T3(sp)
- REG_L x29, PT_T4(sp)
- REG_L x30, PT_T5(sp)
- REG_L x31, PT_T6(sp)
+ /* Restore t0 with PT_EPC */
+ REG_L x5, PT_EPC(sp)
+ restore_from_x6_to_x31
addi sp, sp, PT_SIZE_ON_STACK
.endm
--
2.36.1
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next prev parent reply other threads:[~2023-02-22 3:31 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-22 3:30 [PATCH -next V17 0/7] riscv: Add GENERIC_ENTRY support guoren
2023-02-22 3:30 ` [PATCH -next V17 1/7] compiler_types.h: Add __noinstr_section() for noinstr guoren
2023-03-22 14:46 ` Björn Töpel
2023-03-24 1:51 ` Guo Ren
2023-03-23 0:43 ` Lai Jiangshan
2023-02-22 3:30 ` [PATCH -next V17 2/7] riscv: ptrace: Remove duplicate operation guoren
2023-02-22 3:30 ` [PATCH -next V17 3/7] riscv: entry: Add noinstr to prevent instrumentation inserted guoren
2023-02-22 3:30 ` [PATCH -next V17 4/7] riscv: entry: Convert to generic entry guoren
2023-03-31 18:34 ` Conor Dooley
2023-03-31 18:41 ` Conor Dooley
2023-03-31 18:46 ` Heiko Stübner
2023-03-31 18:55 ` Conor Dooley
2023-03-31 21:22 ` Palmer Dabbelt
2023-04-01 2:15 ` Guo Ren
2023-04-01 12:10 ` Heiko Stübner
2023-04-01 13:19 ` Björn Töpel
2023-04-01 13:33 ` Björn Töpel
2023-04-01 14:58 ` Björn Töpel
2023-04-01 15:42 ` Heiko Stübner
2023-04-01 18:41 ` Björn Töpel
2023-04-07 9:13 ` Guo Ren
2023-04-07 9:18 ` Conor.Dooley
2023-04-08 4:59 ` Guo Ren
2023-04-01 1:39 ` Guo Ren
2023-04-01 9:32 ` Conor Dooley
2023-06-29 14:02 ` Daniel Thompson
2023-06-30 11:16 ` Guo Ren
2023-06-30 11:22 ` Guo Ren
2023-06-30 14:50 ` Daniel Thompson
2023-07-01 2:55 ` Guo Ren
2023-07-01 3:08 ` Guo Ren
2023-07-01 4:22 ` Guo Ren
2023-07-03 3:09 ` Guo Ren
2023-02-22 3:30 ` [PATCH -next V17 5/7] riscv: entry: Remove extra level wrappers of trace_hardirqs_{on,off} guoren
2023-02-22 3:30 ` [PATCH -next V17 6/7] riscv: entry: Consolidate ret_from_kernel_thread into ret_from_fork guoren
2023-02-22 3:30 ` guoren [this message]
2023-03-24 22:01 ` (subset) [PATCH -next V17 0/7] riscv: Add GENERIC_ENTRY support Palmer Dabbelt
2023-03-24 22:10 ` patchwork-bot+linux-riscv
2023-03-27 23:27 ` Palmer Dabbelt
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