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author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2012-02-20 02:15:03 +0000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-02-23 10:50:01 +1100 |
commit | 3ccc00a7e04ff7718c9aebb4b0c982571c798759 (patch) | |
tree | 8e3dd27ba9fcc6c504409e5e0f76a73dbd38479a /arch/powerpc/mm/hash_utils_64.c | |
parent | eb39c8803d0e3d98fe74825f99287f63d55e6460 (diff) | |
download | op-kernel-dev-3ccc00a7e04ff7718c9aebb4b0c982571c798759.zip op-kernel-dev-3ccc00a7e04ff7718c9aebb4b0c982571c798759.tar.gz |
fadump: Register for firmware assisted dump.
On 2012-02-20 11:02:51 Mon, Paul Mackerras wrote:
> On Thu, Feb 16, 2012 at 04:44:30PM +0530, Mahesh J Salgaonkar wrote:
>
> If I have read the code correctly, we are going to get this printk on
> non-pSeries machines or on older pSeries machines, even if the user
> has not put the fadump=on option on the kernel command line. The
> printk will be annoying since there is no actual error condition. It
> seems to me that the condition for the printk should include
> fw_dump.fadump_enabled. In other words you should probably add
>
> if (!fw_dump.fadump_enabled)
> return 0;
>
> at the beginning of the function.
Hi Paul,
Thanks for pointing it out. Please find the updated patch below.
The existing patches above this (4/10 through 10/10) cleanly applies
on this update.
Thanks,
-Mahesh.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
-rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 2d28218..b534bba 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -55,6 +55,7 @@ #include <asm/spu.h> #include <asm/udbg.h> #include <asm/code-patching.h> +#include <asm/fadump.h> #ifdef DEBUG #define DBG(fmt...) udbg_printf(fmt) @@ -625,6 +626,16 @@ static void __init htab_initialize(void) /* Using a hypervisor which owns the htab */ htab_address = NULL; _SDR1 = 0; +#ifdef CONFIG_FA_DUMP + /* + * If firmware assisted dump is active firmware preserves + * the contents of htab along with entire partition memory. + * Clear the htab if firmware assisted dump is active so + * that we dont end up using old mappings. + */ + if (is_fadump_active() && ppc_md.hpte_clear_all) + ppc_md.hpte_clear_all(); +#endif } else { /* Find storage for the HPT. Must be contiguous in * the absolute address space. On cell we want it to be |