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| author | Michael Neuling <mikey@neuling.org> | 2013-05-30 01:33:19 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-10 02:36:26 +0400 |
| commit | fb0fce3e554e5513aaa1c1c52b2ece11feea3c7d (patch) | |
| tree | e4cfbf84c5519efd83dbf9cfce5c0e88c5a3a191 | |
| parent | d7c67fb1cf00b84829ae06fca04ad39408f156ba (diff) | |
| download | linux-fb0fce3e554e5513aaa1c1c52b2ece11feea3c7d.tar.xz | |
powerpc/power8: Update denormalization handler
POWER8 can take a denormalisation exception on any VSX registers.
This does the extra 32 VSX registers we don't currently handle.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 3c9296bcf960..e783453f910d 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -480,6 +480,16 @@ FTR_SECTION_ELSE XVCPSGNDP32(0) ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206) + +BEGIN_FTR_SECTION + b denorm_done +END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) +/* + * To denormalise we need to move a copy of the register to itself. + * For POWER8 we need to do that for all 64 VSX registers + */ + XVCPSGNDP32(32) +denorm_done: mtspr SPRN_HSRR0,r11 mtcrf 0x80,r9 ld r9,PACA_EXGEN+EX_R9(r13) |