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Commit a54b8a7d authored by Elliot Berman's avatar Elliot Berman
Browse files

power: reset: qcom-dload-mode: Store KASLR offset when available 



Store KASLR offset in imem property when requested by devicetree.

Change-Id: I4f5f359fadab413db6bc5e80799a445218251872
Signed-off-by: default avatarElliot Berman <eberman@codeaurora.org>
parent f9dc3d38

drivers/power/reset/qcom-dload-mode.c

+22 −0
Original line number Diff line number Diff line
@@ -213,6 +213,27 @@ static void __iomem *map_prop_mem(const char *propname) 
	return addr;

}



#ifdef CONFIG_RANDOMIZE_BASE

#define KASLR_OFFSET_MASK	0x00000000FFFFFFFF

static void store_kaslr_offset(void)

{

	void __iomem *mem = map_prop_mem("qcom,msm-imem-kaslr_offset");



	if (!mem)

		return;



	__raw_writel(0xdead4ead, mem);

	__raw_writel((kimage_vaddr - KIMAGE_VADDR) & KASLR_OFFSET_MASK,

		     mem + 4);

	__raw_writel(((kimage_vaddr - KIMAGE_VADDR) >> 32) & KASLR_OFFSET_MASK,

		     mem + 8);



	iounmap(mem);

}

#else

static void store_kaslr_offset(void) {}

#endif /* CONFIG_RANDOMIZE_BASE */



static int qcom_dload_probe(struct platform_device *pdev)

{

	struct qcom_dload *poweroff;
@@ -238,6 +259,7 @@ static int qcom_dload_probe(struct platform_device *pdev) 
	}



	poweroff->dload_dest_addr = map_prop_mem("qcom,msm-imem-dload-type");

	store_kaslr_offset();



	if (enable_dump)

		set_download_mode(QCOM_DOWNLOAD_FULLDUMP);