Linux

335,430 Commits 1 Branch 949 Tags

2 Commits

Author	SHA1	Message	Date
Thomas Gleixner	2fd8658931	arm: Implement l2x0 cache disable functions Add flush_all, inv_all and disable functions to the l2x0 code. These functions are called from kexec code to prevent random crashes in the new kernel. Platforms like OMAP which control L2 enable/disable via SMI mode can override the outer_cache.disable() function to implement their own. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Catalin Marinas <[email protected]> Acked-by: Linus Walleij <[email protected]>	2010-10-26 11:39:58 +05:30
Thomas Gleixner	ae360a78f4	arm: Disable outer (L2) cache in kexec kexec does not disable the outer cache before disabling the inner caches in cpu_proc_fin(). So L2 is enabled across the kexec jump. When the new kernel enables chaches again, it randomly crashes. Disabling L2 before calling cpu_proc_fin() cures the problem. Disabling L2 requires the following new functions: flush_all(), inv_all() and disable(). Add them to outer_cache_fns and call them from the kexec code. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Catalin Marinas <[email protected]> Acked-by: Linus Walleij <[email protected]>	2010-10-26 11:39:56 +05:30

Author

SHA1

Message

Date

Thomas Gleixner

2fd8658931

arm: Implement l2x0 cache disable functions

Add flush_all, inv_all and disable functions to the l2x0 code. These
functions are called from kexec code to prevent random crashes in the
new kernel.

Platforms like OMAP which control L2 enable/disable via SMI mode can
override the outer_cache.disable() function to implement their own.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Acked-by: Linus Walleij <[email protected]>

2010-10-26 11:39:58 +05:30

Thomas Gleixner

ae360a78f4

arm: Disable outer (L2) cache in kexec

kexec does not disable the outer cache before disabling the inner
caches in cpu_proc_fin(). So L2 is enabled across the kexec jump. When
the new kernel enables chaches again, it randomly crashes.

Disabling L2 before calling cpu_proc_fin() cures the problem.

Disabling L2 requires the following new functions: flush_all(),
inv_all() and disable(). Add them to outer_cache_fns and call them
from the kexec code.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Acked-by: Linus Walleij <[email protected]>

2010-10-26 11:39:56 +05:30