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dda45f701c
linux/arch/mips
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Matt Redfearn dda45f701c MIPS: Switch to the irq_stack in interrupts 
When enterring interrupt context via handle_int or except_vec_vi, switch
to the irq_stack of the current CPU if it is not already in use.

The current stack pointer is masked with the thread size and compared to
the base or the irq stack. If it does not match then the stack pointer
is set to the top of that stack, otherwise this is a nested irq being
handled on the irq stack so the stack pointer should be left as it was.

The in-use stack pointer is placed in the callee saved register s1. It
will be saved to the stack when plat_irq_dispatch is invoked and can be
restored once control returns here.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Acked-by: Jason A. Donenfeld <jason@zx2c4.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14743/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-03 16:34:34 +01:00
..
alchemy clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
ar7 MIPS: ar7: use gpiochip data pointer 2016-02-19 09:51:43 +01:00
ath25 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ath79 MIPS: ath79: Fix test for error return of clk_register_fixed_factor(). 2016-09-13 14:13:26 +02:00
bcm47xx MIPS: BCM47xx: Make serial explicitly non-modular 2016-10-04 16:13:57 +02:00
bcm63xx MIPS: BCM63xx: Let clk_disable() return immediately if clk is NULL 2016-10-04 16:13:57 +02:00
bmips MIPS: BMIPS: Support APPENDED_DTB 2016-10-06 17:31:02 +02:00
boot MIPS: Zboot: Don't use $(LINUXINCLUDE) twice 2017-01-03 16:34:32 +01:00
cavium-octeon MIPS: Octeon: Kill cvmx_helper_link_autoconf() 2017-01-03 16:34:32 +01:00
cobalt MIPS: Cobalt: Fix typo 2016-08-03 08:16:30 +02:00
configs MIPS: generic: Convert SEAD-3 to a generic board 2016-10-06 18:04:20 +02:00
dec Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
emma
fw MIPS: Fix misspellings in comments. 2016-04-03 12:32:09 +02:00
generic MIPS: generic: Fix KASLR for generic kernel. 2016-11-04 00:32:06 +01:00
include MIPS: Only change $28 to thread_info if coming from user mode 2017-01-03 16:34:34 +01:00
jazz Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
jz4740 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
kernel MIPS: Switch to the irq_stack in interrupts 2017-01-03 16:34:34 +01:00
kvm KVM: MIPS: Precalculate MMIO load resume PC 2016-10-26 13:43:55 +02:00
lantiq MIPS: Lantiq: Fix mask of GPE frequency 2016-12-11 11:20:25 +01:00
lasat mips: separate extable.h, switch module.h to it 2016-10-05 18:36:18 -04:00
lib MIPS: dump_tlb: Fix printk continuations 2016-11-04 01:04:32 +01:00
loongson32 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
loongson64 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
math-emu Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mm MIPS: IP22: Fix build error due to binutils 2.25 uselessnes. 2017-01-03 16:34:33 +01:00
mti-malta clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
net treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
netlogic clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
oprofile Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:05:56 -08:00
paravirt MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
pci MIPS: TXx9: Modernize printing of kernel messages 2017-01-03 16:34:32 +01:00
pic32 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
pistachio Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
pmcs-msp71xx MIPS: MSP71xx: Use __flush_cache_all instead of flush_cache_all. 2016-05-13 14:01:38 +02:00
pnx833x MIPS: Squash lines for simple wrapper functions 2016-10-04 16:13:57 +02:00
power
ralink MIPS: ralink: Make timer explicitly non-modular 2016-10-04 16:13:57 +02:00
rb532 MIPS: rb532: use gpiochip data pointer 2016-02-19 09:51:44 +01:00
sgi-ip22 Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sgi-ip27 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
sgi-ip32 Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sibyte Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sni char/genrtc: remove asm-generic/rtc.h from mips 2016-06-04 00:23:36 +02:00
txx9 MIPS: TXx9: Modernize printing of kernel messages 2017-01-03 16:34:32 +01:00
vdso MIPS: VDSO: Drop duplicated -I*/-E* aflags 2016-10-11 15:07:30 +02:00
vr41xx MIPS: VR41xx: Fix typo 2016-05-28 12:35:09 +02:00
xilfpga mips: Remove unnecessary of_platform_populate with default match table 2016-06-23 15:00:29 -05:00
Kbuild MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
Kbuild.platforms MIPS: generic: Convert SEAD-3 to a generic board 2016-10-06 18:04:20 +02:00
Kconfig Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
Kconfig.debug MIPS: Remove compact branch policy Kconfig entries 2016-09-13 14:14:50 +02:00
Makefile MIPS: zboot: Add "uzImage.bin" target 2017-01-03 16:34:31 +01:00