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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>,
npiggin@gmail.com, msuchanek@suse.de
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [RFC PATCH v3 11/15] powerpc/syscall: Save r3 in regs->orig_r3
Date: Mon, 6 Apr 2020 18:16:47 +0000 (UTC) [thread overview]
Message-ID: <6f5cb16636ee153a43e0ca77a7b1cdfaa2d98355.1586196948.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <5aeaa33383e833f6eca30893fbd188b88e019eaa.1586196948.git.christophe.leroy@c-s.fr>
Save r3 in regs->orig_r3 in system_call_exception()
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/kernel/entry_64.S | 1 -
arch/powerpc/kernel/syscall.c | 2 ++
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 63f0a4414618..5ccb65f75712 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -114,7 +114,6 @@ END_BTB_FLUSH_SECTION
std r10,_LINK(r1)
std r11,_TRAP(r1)
std r12,_CCR(r1)
- std r3,ORIG_GPR3(r1)
addi r10,r1,STACK_FRAME_OVERHEAD
ld r11,exception_marker@toc(r2)
std r11,-16(r10) /* "regshere" marker */
diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c
index 0ad4250d2ce8..dfd7b28239b8 100644
--- a/arch/powerpc/kernel/syscall.c
+++ b/arch/powerpc/kernel/syscall.c
@@ -27,6 +27,8 @@ notrace long system_call_exception(long r3, long r4, long r5,
unsigned long ti_flags;
syscall_fn f;
+ regs->orig_gpr3 = r3;
+
if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
BUG_ON(irq_soft_mask_return() != IRQS_ALL_DISABLED);
--
2.25.0
next prev parent reply other threads:[~2020-04-06 18:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 18:16 [RFC PATCH v3 01/15] powerpc/syscall: Refactorise from Nick Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 02/15] powerpc/radix: Make kuap_check_amr() and kuap_restore_amr() generic Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 03/15] powerpc/32s: Create C version of kuap_restore() and kuap_check() Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 04/15] powerpc/8xx: " Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 05/15] powerpc/irq: Add helpers to get and set regs->softe Christophe Leroy
2020-04-07 0:50 ` Nicholas Piggin
2020-04-06 18:16 ` [RFC PATCH v3 06/15] powerpc/irq: Add new helpers to play with MSR_EE and MSR_RI on PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 07/15] powerpc/irq: Add stub irq_soft_mask_return() for PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 08/15] powerpc/syscall: Rename syscall_64.c into syscall.c Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 09/15] powerpc/syscall: Make syscall_64.c buildable on PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 10/15] powerpc/syscall: Use is_compat_task() Christophe Leroy
2020-04-06 18:16 ` Christophe Leroy [this message]
2020-04-06 18:16 ` [RFC PATCH v3 12/15] powerpc/syscall: Selectively check MSR_RI and MSR_PR on syscall entry Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 13/15] powerpc/syscall: system call implement entry/exit logic in C for PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 14/15] powerpc/syscall: Avoid stack frame in likely part of syscall_call_exception() Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 15/15] powerpc/kernel: Do not inconditionally save non volatile registers on system call Christophe Leroy
2020-04-07 1:10 ` Nicholas Piggin
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