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| author | Khalid Aziz <khalid.aziz@oracle.com> | 2015-05-27 10:00:46 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-31 22:15:01 -0700 |
| commit | 494e5b6faeda1d1e830a13e10b3c7bc323f35d97 (patch) | |
| tree | 612e28b6b6678d133d960b9241401aa0e8ddc98d /arch/sparc/include/asm/trap_block.h | |
| parent | f0c1a1173773a56d500f1814893e63f97580f76a (diff) | |
| download | linux-494e5b6faeda1d1e830a13e10b3c7bc323f35d97.tar.bz2 | |
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
Bit 9 of TTE is CV (Cacheable in V-cache) on sparc v9 processor while
the same bit 9 is MCDE (Memory Corruption Detection Enable) on M7
processor. This creates a conflicting usage of the same bit. Kernel
sets TTE.cv bit on all pages for sun4v architecture which works well
for sparc v9 but enables memory corruption detection on M7 processor
which is not the intent. This patch adds code to determine if kernel
is running on M7 processor and takes steps to not enable memory
corruption detection in TTE erroneously.
Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm/trap_block.h')
| -rw-r--r-- | arch/sparc/include/asm/trap_block.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/trap_block.h b/arch/sparc/include/asm/trap_block.h index 6fd4436d32f0..ec9c04de3664 100644 --- a/arch/sparc/include/asm/trap_block.h +++ b/arch/sparc/include/asm/trap_block.h @@ -79,6 +79,8 @@ struct sun4v_2insn_patch_entry { }; extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch, __sun4v_2insn_patch_end; +extern struct sun4v_2insn_patch_entry __sun_m7_2insn_patch, + __sun_m7_2insn_patch_end; #endif /* !(__ASSEMBLY__) */ |