linux-kernel - [PATCH 4.4 084/137] ARM: OMAP2+: Fix save_secure_ram

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Date:	Tue, 23 Feb 2016 19:33:35 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Kees Cook <keescook@...omium.org>,
	Laura Abbott <labbott@...hat.com>, Nishanth Menon <nm@...com>,
	Richard Woodruff <r-woodruff2@...com>,
	Russell King <linux@....linux.org.uk>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Tero Kristo <t-kristo@...com>, Nicolas Pitre <nico@...aro.org>,
	Tony Lindgren <tony@...mide.com>
Subject: [PATCH 4.4 084/137] ARM: OMAP2+: Fix save_secure_ram_context for rodata

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tony Lindgren <tony@...mide.com>

commit a5311d4d13df80bd71a9e47f9ecaf327f478fab1 upstream.

We don't want to write to .text and we can move save_secure_ram_context
into .data as it all gets copied into SRAM anyways.

Cc: Kees Cook <keescook@...omium.org>
Cc: Laura Abbott <labbott@...hat.com>
Cc: Nishanth Menon <nm@...com>
Cc: Richard Woodruff <r-woodruff2@...com>
Cc: Russell King <linux@....linux.org.uk>
Cc: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc: Tero Kristo <t-kristo@...com>
Acked-by: Nicolas Pitre <nico@...aro.org>
Fixes: 1e6b48116a95 ("ARM: mm: allow non-text sections to be
non-executable")
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/mach-omap2/sleep34xx.S |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/arch/arm/mach-omap2/sleep34xx.S
+++ b/arch/arm/mach-omap2/sleep34xx.S
@@ -92,8 +92,12 @@ ENTRY(enable_omap3630_toggle_l2_on_resto
 	ldmfd	sp!, {pc}	@ restore regs and return
 ENDPROC(enable_omap3630_toggle_l2_on_restore)
 
-	.text
-/* Function to call rom code to save secure ram context */
+/*
+ * Function to call rom code to save secure ram context. This gets
+ * relocated to SRAM, so it can be all in .data section. Otherwise
+ * we need to initialize api_params separately.
+ */
+	.data
 	.align	3
 ENTRY(save_secure_ram_context)
 	stmfd	sp!, {r4 - r11, lr}	@ save registers on stack
@@ -127,6 +131,8 @@ ENDPROC(save_secure_ram_context)
 ENTRY(save_secure_ram_context_sz)
 	.word	. - save_secure_ram_context
 
+	.text
+
 /*
  * ======================
  * == Idle entry point ==