linux_dsm_epyc7002/arch/powerpc
Nicholas Piggin 3db40c312c powerpc/64: Fix __check_irq_replay missing decrementer interrupt
If the decrementer wraps again and de-asserts the decrementer
exception while hard-disabled, __check_irq_replay() has a test to
notice the wrap when interrupts are re-enabled.

The decrementer check must be done when clearing the PACA_IRQ_HARD_DIS
flag, not when the PACA_IRQ_DEC flag is tested. Previously this worked
because the decrementer interrupt was always the first one checked
after clearing the hard disable flag, but HMI check was moved ahead of
that, which introduced this bug.

This can cause a missed decrementer interrupt if we soft-disable
interrupts then take an HMI which is recorded in irq_happened, then
hard-disable interrupts for > 4s to wrap the decrementer.

Fixes: e0e0d6b739 ("powerpc/64: Replay hypervisor maintenance interrupt first")
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-04 12:55:49 +10:00
..
boot powerpc/boot: Fix 64-bit boot wrapper build with non-biarch compiler 2017-07-28 19:35:46 +10:00
configs powerpc/44x/fsp2: Add defconfig for FSP2 board 2017-05-30 14:59:51 +10:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-05-02 15:53:46 -07:00
include Linux v4.13-rc1 2017-07-31 20:20:29 +10:00
kernel powerpc/64: Fix __check_irq_replay missing decrementer interrupt 2017-08-04 12:55:49 +10:00
kvm Linux v4.13-rc1 2017-07-31 20:20:29 +10:00
lib powerpc fixes for 4.13 #2 2017-07-14 15:33:15 -07:00
math-emu Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mm Linux v4.13-rc1 2017-07-31 20:20:29 +10:00
net bpf: Add jited_len to struct bpf_prog 2017-06-06 15:41:24 -04:00
oprofile ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
perf powerpc/perf: Add POWER9 alternate PM_RUN_CYC and PM_RUN_INST_CMPL events 2017-07-12 12:21:49 +10:00
platforms powerpc/83xx/mpc832x_rdb: fix of_irq_to_resource() error check 2017-08-02 19:26:52 +10:00
purgatory kexec, x86/purgatory: Unbreak it and clean it up 2017-03-10 20:55:09 +01:00
sysdev powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
tools powerpc/64: Tool to check head sections location sanity 2017-05-30 14:59:51 +10:00
xmon powerpc/xmon: Add patch_instruction() support for xmon 2017-07-03 23:12:19 +10:00
Kconfig include/linux/string.h: add the option of fortified string.h functions 2017-07-12 16:26:03 -07:00
Kconfig.debug powerpc/xmon: Enable disassembly files (compilation changes) 2017-02-15 20:02:42 +11:00
Makefile powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain 2017-07-26 16:41:54 +10:00
Makefile.postlink powerpc/64: Tool to check head sections location sanity 2017-05-30 14:59:51 +10:00