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ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata

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We don't want to write to .text so let's move ppa_zero_params and
ppa_por_params to .data and access them via pointers.

Note that I have not been able to test as we I don't have a HS
omap4 to test with. The code has been changed in similar way as
for omap3 though.

Cc: Kees Cook <keescook@chromium.org>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Richard Woodruff <r-woodruff2@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Tero Kristo <t-kristo@ti.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org # v4.0+
Fixes: 1e6b48116a ("ARM: mm: allow non-text sections to be
non-executable")
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2016-01-14 12:20:48 -08:00
parent 0a0b132755
commit 4da597d166
1 changed files with 17 additions and 8 deletions
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25
arch/arm/mach-omap2/sleep44xx.S
View File

@ -29,12 +29,6 @@
dsb
.endm
ppa_zero_params:
.word 0x0
ppa_por_params:
.word 1, 0
#ifdef CONFIG_ARCH_OMAP4
/*
@ -266,7 +260,9 @@ ENTRY(omap4_cpu_resume)
beq skip_ns_smp_enable
ppa_actrl_retry:
mov r0, #OMAP4_PPA_CPU_ACTRL_SMP_INDEX
adr r3, ppa_zero_params @ Pointer to parameters
adr r1, ppa_zero_params_offset
ldr r3, [r1]
add r3, r3, r1 @ Pointer to ppa_zero_params
mov r1, #0x0 @ Process ID
mov r2, #0x4 @ Flag
mov r6, #0xff
@ -303,7 +299,9 @@ skip_ns_smp_enable:
ldr r0, =OMAP4_PPA_L2_POR_INDEX
ldr r1, =OMAP44XX_SAR_RAM_BASE
ldr r4, [r1, #L2X0_PREFETCH_CTRL_OFFSET]
adr r3, ppa_por_params
adr r1, ppa_por_params_offset
ldr r3, [r1]
add r3, r3, r1 @ Pointer to ppa_por_params
str r4, [r3, #0x04]
mov r1, #0x0 @ Process ID
mov r2, #0x4 @ Flag
@ -328,6 +326,8 @@ skip_l2en:
#endif
b cpu_resume @ Jump to generic resume
ppa_por_params_offset:
.long ppa_por_params - .
ENDPROC(omap4_cpu_resume)
#endif /* CONFIG_ARCH_OMAP4 */
@ -380,4 +380,13 @@ ENTRY(omap_do_wfi)
nop
ldmfd sp!, {pc}
ppa_zero_params_offset:
.long ppa_zero_params - .
ENDPROC(omap_do_wfi)
.data
ppa_zero_params:
.word 0
ppa_por_params:
.word 1, 0