diff options
| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2013-10-30 20:05:11 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-12-05 16:04:39 +1100 |
| commit | e22a22740c1ac23aaa10835f026b3549ee3e4e75 (patch) | |
| tree | b9657323d8977882dab4d970316f88281466e9ed /arch/powerpc/include/asm/bitops.h | |
| parent | 0440705049b041d84268ea57f6e90e2f16618897 (diff) | |
| download | blackbird-obmc-linux-e22a22740c1ac23aaa10835f026b3549ee3e4e75.tar.gz blackbird-obmc-linux-e22a22740c1ac23aaa10835f026b3549ee3e4e75.zip | |
powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power7.
If we get a machine check exception due to SLB or TLB errors, then flush
SLBs/TLBs and reload SLBs to recover. We do this in real mode before turning
on MMU. Otherwise we would run into nested machine checks.
If we get a machine check when we are in guest, then just flush the
SLBs and continue. This patch handles errors for power7. The next
patch will handle errors for power8
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/bitops.h')
| -rw-r--r-- | arch/powerpc/include/asm/bitops.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h index 910194e9a1e2..a5e9a7d494d8 100644 --- a/arch/powerpc/include/asm/bitops.h +++ b/arch/powerpc/include/asm/bitops.h @@ -46,6 +46,11 @@ #include <asm/asm-compat.h> #include <asm/synch.h> +/* PPC bit number conversion */ +#define PPC_BITLSHIFT(be) (BITS_PER_LONG - 1 - (be)) +#define PPC_BIT(bit) (1UL << PPC_BITLSHIFT(bit)) +#define PPC_BITMASK(bs, be) ((PPC_BIT(bs) - PPC_BIT(be)) | PPC_BIT(bs)) + /* * clear_bit doesn't imply a memory barrier */ |
