From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v3 15/16] powerpc/32: don't do syscall stuff in transfer_to_handler
Date: Tue, 30 Apr 2019 12:39:04 +0000 (UTC) [thread overview]
Message-ID: <26d4ef723e031925d9252390c7f09aec66f18b54.1556627571.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <cover.1556627571.git.christophe.leroy@c-s.fr>
As syscalls are now handled via a fast entry path, syscall related
actions can be removed from the generic transfer_to_handler path.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/kernel/entry_32.S | 19 -------------------
1 file changed, 19 deletions(-)
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index dc58fec51ed6..e65c3e70c648 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -217,7 +217,6 @@ transfer_to_handler_cont:
*/
tophys(r12, r1)
lwz r12,_MSR(r12)
- xor r12,r10,r12
andi. r12,r12,MSR_EE
bne 1f
@@ -258,9 +257,6 @@ reenable_mmu:
* the rest is restored from the exception frame.
*/
- /* Are we enabling or disabling interrupts ? */
- andi. r0,r10,MSR_EE
-
stwu r1,-32(r1)
stw r9,8(r1)
stw r11,12(r1)
@@ -268,8 +264,6 @@ reenable_mmu:
stw r4,20(r1)
stw r5,24(r1)
- bne- 0f
-
/* If we are disabling interrupts (normal case), simply log it with
* lockdep
*/
@@ -287,19 +281,6 @@ reenable_mmu:
mtctr r11
mtlr r9
bctr /* jump to handler */
-
- /* If we are enabling interrupt, this is a syscall. They shouldn't
- * happen while interrupts are disabled, so let's do a warning here.
- */
-0: trap
- EMIT_BUG_ENTRY 0b,__FILE__,__LINE__, BUGFLAG_WARNING
- bl trace_hardirqs_on
-
- /* Now enable for real */
- mfmsr r10
- ori r10,r10,MSR_EE
- mtmsr r10
- b 2b
#endif /* CONFIG_TRACE_IRQFLAGS */
#if defined (CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
--
2.13.3
next prev parent reply other threads:[~2019-04-30 12:39 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 12:38 [PATCH v3 00/16] powerpc/32: Implement fast syscall entry Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 01/16] powerpc/32: Refactor EXCEPTION entry macros for head_8xx.S and head_32.S Christophe Leroy
2019-05-03 6:59 ` Michael Ellerman
2019-04-30 12:38 ` [PATCH v3 02/16] powerpc/32: move LOAD_MSR_KERNEL() into head_32.h and use it Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 03/16] powerpc/32: make the 6xx/8xx EXC_XFER_TEMPLATE() similar to the 40x/booke one Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 04/16] powerpc/40x: Don't use SPRN_SPRG_SCRATCH2 in EXCEPTION_PROLOG Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 05/16] powerpc/40x: add exception frame marker Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 06/16] powerpc/40x: Split and rename NORMAL_EXCEPTION_PROLOG Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 07/16] powerpc/40x: Refactor exception entry macros by using head_32.h Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 08/16] powerpc/fsl_booke: ensure SPEFloatingPointException() reenables interrupts Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 09/16] powerpc/32: enter syscall with MSR_EE inconditionaly set Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 10/16] powerpc/32: Enter exceptions with MSR_EE unset Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 11/16] powerpc/32: get rid of COPY_EE in exception entry Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 12/16] powerpc: Fix 32-bit handling of MSR_EE on exceptions Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 13/16] powerpc/32: implement fast entry for syscalls on non BOOKE Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 14/16] powerpc/32: implement fast entry for syscalls on BOOKE Christophe Leroy
2019-05-23 6:14 ` Paul Mackerras
2019-05-23 7:00 ` Christophe Leroy
2019-05-23 8:10 ` Christophe Leroy
2019-05-28 5:37 ` Michael Ellerman
2019-05-28 17:03 ` Christophe Leroy
2019-06-03 9:16 ` Christophe Leroy
2019-06-04 16:59 ` Christophe Leroy
2019-04-30 12:39 ` Christophe Leroy [this message]
2019-04-30 12:39 ` [PATCH v3 16/16] powerpc/32: Don't add dummy frames when calling trace_hardirqs_on/off Christophe Leroy
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