linux/arch/powerpc
Nicholas Piggin c6ac667b07 powerpc/64e/interrupt: Fix nvgprs being clobbered
Some interrupt handlers have an "extra" that saves 1 or 2
registers (r14, r15) in the paca save area and makes them available to
use by the handler.

The change to always save nvgprs in exception handlers lead to some
interrupt handlers saving those scratch r14 / r15 registers into the
interrupt frame's GPR saves, which get restored on interrupt exit.

Fix this by always reloading those scratch registers from paca before
the EXCEPTION_COMMON that saves nvgprs.

Fixes: 4228b2c3d2 ("powerpc/64e/interrupt: always save nvgprs on interrupt")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210514044008.1955783-1-npiggin@gmail.com
2021-05-14 17:28:54 +10:00
..
boot kbuild: replace LANG=C with LC_ALL=C 2021-05-02 00:43:35 +09:00
configs powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
crypto crypto: powepc/sha1 - remove unneeded semicolon 2021-03-07 15:13:14 +11:00
include powerpc/64s: Make NMI record implicitly soft-masked code as irqs disabled 2021-05-14 17:28:52 +10:00
kernel powerpc/64e/interrupt: Fix nvgprs being clobbered 2021-05-14 17:28:54 +10:00
kexec powerpc/kexec_file: Use current CPU info while setting up FDT 2021-05-04 22:26:57 +10:00
kvm KVM: PPC: Book3S HV: Fix kvm_unmap_gfn_range_hv() for Hash MMU 2021-05-12 11:07:39 +10:00
lib powerpc/64s: Fix stf mitigation patching w/strict RWX & hash 2021-05-14 17:27:37 +10:00
math-emu powerpc/math: Fix missing __user qualifier for get_user() and other sparse warnings 2021-03-29 13:22:12 +11:00
mm Merge branch 'akpm' (patches from Andrew) 2021-05-05 13:50:15 -07:00
net powerpc/ebpf32: Use standard function call for functions within 32M distance 2021-04-21 22:52:33 +10:00
perf powerpc/perf: Fix the threshold event selection for memory events in power10 2021-04-23 01:38:02 +10:00
platforms powerpc/pseries: warn if recursing into the hcall tracing code 2021-05-12 11:07:39 +10:00
purgatory powerpc/kexec: Don't use .machine ppc64 in trampoline_64.S 2021-04-08 21:17:43 +10:00
sysdev Merge branch 'akpm' (patches from Andrew) 2021-04-30 14:38:01 -07:00
tools powerpc/tools: Remove 90 line limit in checkpatch script 2020-09-08 22:57:11 +10:00
xmon powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
Kbuild
Kconfig Merge branch 'master' into next 2021-05-08 21:12:55 +10:00
Kconfig.debug powerpc: iommu: fix build when neither PCI or IBMVIO is set 2021-04-08 21:17:46 +10:00
Makefile powerpc: Only define _TASK_CPU for 32-bit 2021-04-20 14:22:24 +10:00
Makefile.postlink powerpc: unrel_branch_check.sh: use nm to find symbol value 2020-09-02 11:00:22 +10:00