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c118c7303a
linux/arch/powerpc
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Christophe Leroy c118c7303a powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct 
We need r1 to be properly set before activating MMU, so
reading task_struct->stack must be done with MMU off.

This means we need an additional register to play with MSR
bits while r11 now points to the stack. For that, move r10
back to CR (As is already done for hash MMU) and use r10.

We still don't have r1 correct yet when we activate MMU.
It is done in following patch.

Fixes: 028474876f ("powerpc/32: prepare for CONFIG_VMAP_STACK")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a027d447022a006c9c4958ac734128e577a3c5c1.1599486108.git.christophe.leroy@csgroup.eu
2020-09-15 22:13:33 +10:00
..
boot powerpc/boot: Update Makefile comment for 64bit wrapper 2020-09-08 22:24:19 +10:00
configs powerpc/configs: Add BLK_DEV_NVME to pseries_defconfig 2020-07-29 23:47:53 +10:00
crypto powerpc: Replace HTTP links with HTTPS ones 2020-07-22 00:01:23 +10:00
include powerpc/uaccess: Remove __put_user_asm() and __put_user_asm2() 2020-09-15 22:13:32 +10:00
kernel powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct 2020-09-15 22:13:33 +10:00
kexec powerpc/kexec_file: Enable early kernel OPAL calls 2020-07-29 23:47:55 +10:00
kvm powerpc/64s: handle ISA v3.1 local copy-paste context switches 2020-09-08 22:57:12 +10:00
lib powerpc/uaccess: Switch __patch_instruction() to __put_user_asm_goto() 2020-09-15 22:13:32 +10:00
math-emu
mm powerpc/8xx: Support 16k hugepages with 4k pages 2020-09-15 22:13:31 +10:00
net powerpc/ppc-opcode: Consolidate powerpc instructions from bpf_jit.h 2020-07-16 13:12:42 +10:00
oprofile powerpc/oprofile: fix spelling mistake "contex" -> "context" 2020-08-25 01:31:33 +10:00
perf Merge branch 'fixes' into next 2020-09-14 22:57:18 +10:00
platforms powerpc/tau: Disable TAU between measurements 2020-09-15 22:13:30 +10:00
purgatory powerpc/kexec_file: Enable early kernel OPAL calls 2020-07-29 23:47:55 +10:00
sysdev powerpc/icp-hv: Fix missing of_node_put() in success path 2020-08-25 01:31:31 +10:00
tools powerpc/tools: Remove 90 line limit in checkpatch script 2020-09-08 22:57:11 +10:00
xmon powerpc/watchpoint: Add hw_len wherever missing 2020-09-15 22:13:20 +10:00
Kbuild
Kconfig powerpc/64/mm: implement page mapping percpu first chunk allocator 2020-09-15 22:13:22 +10:00
Kconfig.debug
Makefile powerpc/4xx: ppc4xx compile flag optimizations 2020-06-22 14:19:12 +10:00
Makefile.postlink powerpc: unrel_branch_check.sh: use nm to find symbol value 2020-09-02 11:00:22 +10:00