linux/arch/powerpc
Christophe Leroy d4bf905307 powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK
When CONFIG_PROVE_LOCKING is selected together with (now default)
CONFIG_VMAP_STACK, kernel enter deadlock during boot.

At the point of checking whether interrupts are enabled or not, the
value of MSR saved on stack is read using the physical address of the
stack. But at this point, when using VMAP stack the DATA MMU
translation has already been re-enabled, leading to deadlock.

Don't use the physical address of the stack when
CONFIG_VMAP_STACK is set.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: 028474876f ("powerpc/32: prepare for CONFIG_VMAP_STACK")
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/daeacdc0dec0416d1c587cc9f9e7191ad3068dc0.1581095957.git.christophe.leroy@c-s.fr
2020-02-08 21:49:06 +11:00
..
boot powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
configs powerpc: configs: Cleanup old Kconfig options 2020-01-31 21:29:03 +11:00
crypto crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
include powerpc/futex: Fix incorrect user access blocking 2020-02-08 21:48:39 +11:00
kernel powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK 2020-02-08 21:49:06 +11:00
kexec powerpc: Avoid clang warnings around setjmp and longjmp 2019-11-25 21:45:43 +11:00
kvm powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
lib powerpc: Fix __clear_user() with KUAP enabled 2019-12-16 23:19:44 +11:00
math-emu treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mm powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
net treewide: Use sizeof_field() macro 2019-12-09 10:36:44 -08:00
oprofile powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
perf powerpc/8xx: Use alternative scratch registers in DTLB miss handler 2020-01-27 22:36:16 +11:00
platforms powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
purgatory treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
sysdev powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
tools powerpc: Do not consider weak unresolved symbol relocations as bad 2020-01-31 20:17:22 +11:00
xmon powerpc/xmon: Fix compile error in print_insn* functions 2020-01-26 00:11:35 +11:00
Kbuild powerpc/kexec: Move kexec files into a dedicated subdir. 2019-11-21 15:41:34 +11:00
Kconfig powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
Kconfig.debug powerpc/ptdump: Only enable PPC_CHECK_WX with STRICT_KERNEL_RWX 2020-01-23 21:31:13 +11:00
Makefile powerpc: Don't add -mabi= flags when building with Clang 2019-11-25 21:45:43 +11:00
Makefile.postlink powerpc: Do not consider weak unresolved symbol relocations as bad 2020-01-31 20:17:22 +11:00