diff options
| author | Cyril Bur <cyrilbur@gmail.com> | 2016-02-29 07:53:48 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-03-02 13:34:48 +0100 |
| commit | de2a20aa7237b45d3c14a2505804a8daa95a8f53 (patch) | |
| tree | 13593cbcaa3c487fa1a8a9ce76c1bdc5e50b602f /arch/powerpc/include/asm/reg.h | |
| parent | powerpc: Restore FPU/VEC/VSX if previously used (diff) | |
| download | linux-de2a20aa7237b45d3c14a2505804a8daa95a8f53.tar.xz linux-de2a20aa7237b45d3c14a2505804a8daa95a8f53.zip | |
powerpc: Prepare for splitting giveup_{fpu, altivec, vsx} in two
This prepares for the decoupling of saving {fpu,altivec,vsx} registers and
marking {fpu,altivec,vsx} as being unused by a thread.
Currently giveup_{fpu,altivec,vsx}() does both however optimisations to
task switching can be made if these two operations are decoupled.
save_all() will permit the saving of registers to thread structs and leave
threads MSR with bits enabled.
This patch introduces no functional change.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/reg.h')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 11a81bd5dabd..52ed654d01ba 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -75,6 +75,14 @@ #define MSR_HV 0 #endif +/* + * To be used in shared book E/book S, this avoids needing to worry about + * book S/book E in shared code + */ +#ifndef MSR_SPE +#define MSR_SPE 0 +#endif + #define MSR_VEC __MASK(MSR_VEC_LG) /* Enable AltiVec */ #define MSR_VSX __MASK(MSR_VSX_LG) /* Enable VSX */ #define MSR_POW __MASK(MSR_POW_LG) /* Enable Power Management */ |