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ARM: 9091/1: Revert "mm: qsd8x50: Fix incorrect permission faults"

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This reverts commit e220ba6022.

The VERIFY_PERMISSION_FAULT is introduced since 2009 but no
one use it, just revert it and clean unused comment.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Wang Kefeng 2021-06-03 13:27:35 +01:00 committed by Russell King (Oracle)
parent 6e121df14c
commit 89a0b011fa
2 changed files with 0 additions and 28 deletions
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2
arch/arm/mm/Kconfig
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@ -601,8 +601,6 @@ config CPU_TLB_V6
config CPU_TLB_V7 config CPU_TLB_V7
bool bool
config VERIFY_PERMISSION_FAULT
bool
endif endif
config CPU_HAS_ASID config CPU_HAS_ASID

26
arch/arm/mm/abort-ev7.S
View File

@ -17,31 +17,5 @@ ENTRY(v7_early_abort)
mrc p15, 0, r1, c5, c0, 0 @ get FSR mrc p15, 0, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR mrc p15, 0, r0, c6, c0, 0 @ get FAR
uaccess_disable ip @ disable userspace access uaccess_disable ip @ disable userspace access
/*
* V6 code adjusts the returned DFSR.
* New designs should not need to patch up faults.
*/
#if defined(CONFIG_VERIFY_PERMISSION_FAULT)
/*
* Detect erroneous permission failures and fix
*/
ldr r3, =0x40d @ On permission fault
and r3, r1, r3
cmp r3, #0x0d
bne do_DataAbort
mcr p15, 0, r0, c7, c8, 0 @ Retranslate FAR
isb
mrc p15, 0, ip, c7, c4, 0 @ Read the PAR
and r3, ip, #0x7b @ On translation fault
cmp r3, #0x0b
bne do_DataAbort
bic r1, r1, #0xf @ Fix up FSR FS[5:0]
and ip, ip, #0x7e
orr r1, r1, ip, LSR #1
#endif
b do_DataAbort b do_DataAbort
ENDPROC(v7_early_abort) ENDPROC(v7_early_abort)