From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/7] powerpc: Remove SYNC on non 6xx
Date: Tue, 29 Sep 2020 06:09:17 +0000 (UTC) [thread overview]
Message-ID: <27951fa6c9a8f80724d1bc81a6117ac32343a55d.1601359702.git.christophe.leroy@csgroup.eu> (raw)
SYNC is usefull for Powerpc 601 only. On everything else,
SYNC is empty.
Remove it from code that is not made to run on 6xx.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/kernel/head_40x.S | 1 -
arch/powerpc/kernel/head_booke.h | 1 -
arch/powerpc/kernel/misc_64.S | 1 -
3 files changed, 3 deletions(-)
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 5b282d9965a5..44c9018aed1b 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -72,7 +72,6 @@ turn_on_mmu:
lis r0,start_here@h
ori r0,r0,start_here@l
mtspr SPRN_SRR0,r0
- SYNC
rfi /* enables MMU */
b . /* prevent prefetch past rfi */
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 18f87bf9e32b..71c359d438b5 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -176,7 +176,6 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
#endif
mtspr SPRN_SRR1,r10
mtspr SPRN_SRR0,r11
- SYNC
RFI /* jump to handler, enable MMU */
99: b ret_from_kernel_syscall
.endm
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 7bb46ad98207..070465825c21 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -365,7 +365,6 @@ _GLOBAL(kexec_smp_wait)
li r4,KEXEC_STATE_REAL_MODE
stb r4,PACAKEXECSTATE(r13)
- SYNC
b kexec_wait
--
2.25.0
next reply other threads:[~2020-09-29 6:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 6:09 Christophe Leroy [this message]
2020-09-29 6:09 ` [PATCH v2 2/7] powerpc: Remove CONFIG_PPC601_SYNC_FIX Christophe Leroy
2020-09-29 6:09 ` [PATCH v2 3/7] powerpc: Drop SYNC_601() ISYNC_601() and SYNC() Christophe Leroy
2020-09-29 6:09 ` [PATCH v2 4/7] powerpc: Remove PowerPC 601 Christophe Leroy
2020-09-29 22:01 ` Segher Boessenkool
2020-09-29 6:09 ` [PATCH v2 5/7] powerpc: Remove support for " Christophe Leroy
2020-09-29 6:09 ` [PATCH v2 6/7] powerpc: Tidy up a bit after removal of " Christophe Leroy
2020-09-29 6:09 ` [PATCH v2 7/7] powerpc: Remove __USE_RTC() Christophe Leroy
2020-09-29 6:46 ` [PATCH v2 1/7] powerpc: Remove SYNC on non 6xx Christophe Leroy
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