ARM_PATCH_PHYS_VIRT and AUTO_ZRELADDR have been enabled as default configs to MSM platform

Introduction of PHYS_VIRT config as default would enable phy-to-virt and virt-to-phy translation function at boot and module loading time and enforce dynamic reallocation of memory. AUTO_ZRELADDR config would enable calculation of kernel load address at run time.

PHYS_VIRT config is mutually exclusive to XIP_KERNEL, XIP_KERNEL is used in systems with NOR flash devices, and ZRELADDR config is mutually exclusive to ZBOOT_ROM.

CFT::Call For Testing

Requesting maintainers of MSM platforms to evaluate the changes on the board and comment, as I dont have the board for testing and also requesting an ACK

Signed-off-by: panchaxari panchaxari.prasannamurthy@linaro.org Cc: David Brown davidb@codeaurora.org Cc: Daniel Walker dwalker@fifo99.com Cc: Bryan Huntsman bryanh@codeaurora.org Cc: Russell King linux@arm.linux.org.uk Cc: Linus Walleij linus.walleij@linaro.org Cc: linux-arm-msm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org

--- ARCH_MSM supports for Qualcomm MSM/QSD based systems. This runs on the apps processor of the MSM/QSD and depends on a shared memory interface to the modem processor which runs the baseband stack and controls some vital subsystems like clock and power control.

Snapdragon is based on ARMv7 instruction set. And supports Random memory devices like DDR1, LPDDR2 and LPDDR3. And storage memory devices like NAND, eMMC.

Below lkml link is a quoting by Russell which clears the concept of PHYS_VIRT and ZRELADDR ---------------------------------------------------

https://lkml.org/lkml/2011/10/14/434

------------------------------------------------- --- arch/arm/Kconfig | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 13621ed..3b77864 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -638,6 +638,8 @@ config ARCH_PXA config ARCH_MSM bool "Qualcomm MSM" select ARCH_REQUIRE_GPIOLIB + select ARM_PATCH_PHYS_VIRT + select AUTO_ZRELADDR select CLKSRC_OF if OF select COMMON_CLK select GENERIC_CLOCKEVENTS