From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH 06/18] powerpc: add interrupt_cond_local_irq_enable helper
Date: Fri, 6 Nov 2020 00:34:19 +1000 [thread overview]
Message-ID: <20201105143431.1874789-7-npiggin@gmail.com> (raw)
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
Simple helper for synchronous interrupt handlers to use to enable
interrupts if they were taken in interrupt-enabled context.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 7 +++++++
arch/powerpc/kernel/traps.c | 24 +++++++-----------------
arch/powerpc/mm/fault.c | 4 +---
3 files changed, 15 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index c5ffcf144bbd..446e24b0eee1 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -3,6 +3,7 @@
#define _ASM_POWERPC_INTERRUPT_H
#include <linux/context_tracking.h>
+#include <linux/hardirq.h>
#include <asm/ftrace.h>
struct interrupt_state {
@@ -251,4 +252,10 @@ DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
void replay_system_reset(void);
void replay_soft_interrupts(void);
+static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
+{
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+}
+
#endif /* _ASM_POWERPC_INTERRUPT_H */
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 823fa827a70e..2d19df1f6c05 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -343,8 +343,8 @@ static bool exception_common(int signr, struct pt_regs *regs, int code,
show_signal_msg(signr, regs, code, addr);
- if (arch_irqs_disabled() && !arch_irq_disabled_regs(regs))
- local_irq_enable();
+ if (arch_irqs_disabled())
+ interrupt_cond_local_irq_enable(regs);
current->thread.trap_nr = code;
@@ -1575,9 +1575,7 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
if (!user_mode(regs))
goto sigill;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
/* (reason & REASON_ILLEGAL) would be the obvious thing here,
* but there seems to be a hardware bug on the 405GP (RevD)
@@ -1631,9 +1629,7 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception)
int sig, code, fixed = 0;
unsigned long reason;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
reason = get_reason(regs);
@@ -1794,9 +1790,7 @@ DEFINE_INTERRUPT_HANDLER(facility_unavailable_exception)
die("Unexpected facility unavailable exception", regs, SIGABRT);
}
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
if (status == FSCR_DSCR_LG) {
/*
@@ -2141,9 +2135,7 @@ void SPEFloatingPointException(struct pt_regs *regs)
int code = FPE_FLTUNK;
int err;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
flush_spe_to_thread(current);
@@ -2190,9 +2182,7 @@ void SPEFloatingPointRoundException(struct pt_regs *regs)
extern int speround_handler(struct pt_regs *regs);
int err;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
preempt_disable();
if (regs->msr & MSR_SPE)
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index d1c5ef853860..fd0c56c80c3c 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -443,9 +443,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
return bad_area_nosemaphore(regs, address);
}
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
--
2.23.0
next prev parent reply other threads:[~2020-11-05 14:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 14:34 [PATCH 00/18] powerpc: interrupt wrappers Nicholas Piggin
2020-11-05 14:34 ` [PATCH 01/18] powerpc/64s: move the last of the page fault handling logic to C Nicholas Piggin
2020-11-05 21:54 ` kernel test robot
2020-11-05 14:34 ` [PATCH 02/18] powerpc: remove arguments from fault handler functions Nicholas Piggin
2020-11-06 7:59 ` Christophe Leroy
2020-11-10 8:29 ` Nicholas Piggin
2020-11-10 11:15 ` Christophe Leroy
2020-11-11 4:45 ` Nicholas Piggin
2020-11-05 14:34 ` [PATCH 03/18] powerpc: bad_page_fault, do_break get registers from regs Nicholas Piggin
2020-11-05 20:43 ` kernel test robot
2020-11-06 8:14 ` Christophe Leroy
2020-11-10 8:34 ` Nicholas Piggin
2020-11-10 11:19 ` Christophe Leroy
2020-11-11 4:46 ` Nicholas Piggin
2020-11-11 6:39 ` Nicholas Piggin
2020-11-05 14:34 ` [PATCH 04/18] powerpc: interrupt handler wrapper functions Nicholas Piggin
2020-11-05 14:34 ` [PATCH 05/18] powerpc: add interrupt wrapper entry / exit stub functions Nicholas Piggin
2020-11-05 14:34 ` Nicholas Piggin [this message]
2020-11-05 14:34 ` [PATCH 07/18] powerpc/64: context tracking remove _TIF_NOHZ Nicholas Piggin
2020-11-05 14:34 ` [PATCH 08/18] powerpc/64: context tracking move to interrupt wrappers Nicholas Piggin
2020-11-05 14:34 ` [PATCH 09/18] powerpc/64: add context tracking to asynchronous interrupts Nicholas Piggin
2020-11-05 14:34 ` [PATCH 10/18] powerpc/64s: move context tracking exit to interrupt exit path Nicholas Piggin
2020-11-05 14:34 ` [PATCH 11/18] powerpc/64s: reconcile interrupts in C Nicholas Piggin
2020-11-05 14:34 ` [PATCH 12/18] powerpc/64: move account_stolen_time into its own function Nicholas Piggin
2020-11-05 14:34 ` [PATCH 13/18] powerpc/64: entry cpu time accounting in C Nicholas Piggin
2020-11-05 14:34 ` [PATCH 14/18] powerpc: move NMI entry/exit code into wrapper Nicholas Piggin
2020-11-05 14:34 ` [PATCH 15/18] powerpc/64s: move NMI soft-mask handling to C Nicholas Piggin
2020-11-05 14:34 ` [PATCH 16/18] powerpc/64s: runlatch interrupt handling in C Nicholas Piggin
2020-11-05 14:34 ` [PATCH 17/18] powerpc/64s: power4 nap fixup " Nicholas Piggin
2020-11-05 14:34 ` [PATCH 18/18] powerpc/64s: move power4 idle entirely to C Nicholas Piggin
2020-11-06 7:34 ` kernel test robot
2020-11-07 9:43 ` Christophe Leroy
2020-11-10 8:43 ` Nicholas Piggin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201105143431.1874789-7-npiggin@gmail.com \
--to=npiggin@gmail.com \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).