2015-06-02 14:11:57

by Vitaly Andrianov

Subject: [PATCH] ARM: mm: use virt_to_idmap to get phys_reset address

This patch is to get correct physical address of the reset function for
PAE systems, which use aliased physical memory for booting.

See the "ARM: mm: Introduce virt_to_idmap() with an arch hook" for details.

Signed-off-by: Vitaly Andrianov <[email protected]>
---
arch/arm/kernel/reboot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c
index 1a4d232..3826935 100644
--- a/arch/arm/kernel/reboot.c
+++ b/arch/arm/kernel/reboot.c
@@ -50,7 +50,7 @@ static void __soft_restart(void *addr)
flush_cache_all();

/* Switch to the identity mapping. */
- phys_reset = (phys_reset_t)(unsigned long)virt_to_phys(cpu_reset);
+ phys_reset = (phys_reset_t)(unsigned long)virt_to_idmap(cpu_reset);
phys_reset((unsigned long)addr);

/* Should never get here. */
--
1.9.1

2015-07-06 14:41:41

by Russell King - ARM Linux

Subject: Re: [PATCH] ARM: mm: use virt_to_idmap to get phys_reset address

On Tue, Jun 02, 2015 at 10:14:30AM -0400, Vitaly Andrianov wrote:
> This patch is to get correct physical address of the reset function for
> PAE systems, which use aliased physical memory for booting.
>
> See the "ARM: mm: Introduce virt_to_idmap() with an arch hook" for details.
>
> Signed-off-by: Vitaly Andrianov <[email protected]>

Please send this to the patch system, thanks.

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