Commit 09024aa6 authored Dec 17, 2013 by Geoff Levand Committed by Catalin Marinas Feb 26, 2014

arm64: Fix the soft_restart routine



Change the soft_restart() routine to call cpu_reset() at its identity mapped
physical address.

The cpu_reset() routine must be called at its identity mapped physical address
so that when the MMU is turned off the instruction pointer will be at the correct
location in physical memory.

Signed-off-by: Geoff Levand <geoff@infradead.org> for Huawei, Linaro
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent ea8c2e11

arch/arm64/kernel/process.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -72,8 +72,17 @@ static void setup_restart(void)

		void soft_restart(unsigned long addr)
		{
		typedef void (*phys_reset_t)(unsigned long);
		phys_reset_t phys_reset;

		setup_restart();
		cpu_reset(addr);

		/* Switch to the identity mapping */
		phys_reset = (phys_reset_t)virt_to_phys(cpu_reset);
		phys_reset(addr);

		/* Should never get here */
		BUG();
		}

		/*