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Commit 0fd42612 authored by Neil Leeder's avatar Neil Leeder
Browse files

cpaccess: use mmu function to write to memory 



Kernel memory can be write protected, so use the
provided mmu function which will temporarily remove
the write protection to replace a word in kernel memory.

Change-Id: I22abfd9f7b61fd9494d6b39825ca465b3338533a
Signed-off-by: default avatarNeil Leeder <nleeder@codeaurora.org>
parent f522312c

drivers/soc/qcom/cpaccess64.c

+2 −3
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <linux/types.h>

#include <asm/cacheflush.h>

#include <asm/smp_plat.h>

#include <asm/mmu.h>



#define TYPE_MAX_CHARACTERS 20
@@ -113,9 +114,7 @@ static u64 do_cpregister_rw(int write) 
	 * instruction, ensuring cache coherency.

	 */

	p_opcode = (u32 *)&cpaccess_dummy_inst;

	*p_opcode = opcode;

	flush_icache_range((unsigned long) p_opcode,

		(unsigned long)(p_opcode+sizeof(unsigned long)));

	mem_text_write_kernel_word(p_opcode, opcode);



	/*

	 * Use smp_call_function_single to do CPU core specific