ARM: OMAP2+: Fix l2_inv_api_params for rodata

We don't want to write to .text, so let's move l2_inv_api_params
to .data and access it via a pointer.

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: 1e6b48116a95 ("ARM: mm: allow non-text sections to be
non-executable")
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S
index 8e2a7acb823b6bc1e7ec02cb97d7f4221d28d418..1b9f0520dea9154afa31f9668241e03f211fdc6a 100644 (file)
--- a/arch/arm/mach-omap2/sleep34xx.S
+++ b/arch/arm/mach-omap2/sleep34xx.S
@@ -436,12 +436,14 @@ skipl2dis:
        and     r1, #0x700
        cmp     r1, #0x300
        beq     l2_inv_gp
+       adr     r0, l2_inv_api_params_offset
+       ldr     r3, [r0]
+       add     r3, r3, r0              @ r3 points to dummy parameters
        mov     r0, #40                 @ set service ID for PPA
        mov     r12, r0                 @ copy secure Service ID in r12
        mov     r1, #0                  @ set task id for ROM code in r1
        mov     r2, #4                  @ set some flags in r2, r6
        mov     r6, #0xff
-       adr     r3, l2_inv_api_params   @ r3 points to dummy parameters
        dsb                             @ data write barrier
        dmb                             @ data memory barrier
        smc     #1                      @ call SMI monitor (smi #1)
@@ -475,8 +477,8 @@ skipl2dis:
        b       logic_l1_restore
 
        .align
-l2_inv_api_params:
-       .word   0x1, 0x00
+l2_inv_api_params_offset:
+       .long   l2_inv_api_params - .
 l2_inv_gp:
        /* Execute smi to invalidate L2 cache */
        mov r12, #0x1                   @ set up to invalidate L2
@@ -531,6 +533,10 @@ l2dis_3630_offset:
 l2dis_3630:
        .word   0
 
+       .data
+l2_inv_api_params:
+       .word   0x1, 0x00
+
 /*
  * Internal functions
  */