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author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-08-18 10:47:28 +0200 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-18 15:49:55 +0200 |
commit | 51ed00e71f0130e0f3534b8e7d78facd16829426 (patch) | |
tree | 524fc178b50d0eb9d20f013b426728d693e8cf35 /arch/powerpc/kernel/vector.S | |
parent | selftests/powerpc: Remove duplicated include from tm-poison.c (diff) | |
download | linux-51ed00e71f0130e0f3534b8e7d78facd16829426.tar.xz linux-51ed00e71f0130e0f3534b8e7d78facd16829426.zip |
powerpc/32: Remove unneccessary calculations in load_up_{fpu/altivec}
No need to re-read SPRN_THREAD, we can calculate thread address
from current (r2).
And remove a reload of value 1 into r4 as r4 is already 1.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c04cce578b97a76a9e69a096698b1d89f721768a.1629276437.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/vector.S')
-rw-r--r-- | arch/powerpc/kernel/vector.S | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index fc120fac1910..ba03eedfdcd8 100644 --- a/arch/powerpc/kernel/vector.S +++ b/arch/powerpc/kernel/vector.S @@ -65,9 +65,8 @@ _GLOBAL(load_up_altivec) 1: /* enable use of VMX after return */ #ifdef CONFIG_PPC32 - mfspr r5,SPRN_SPRG_THREAD /* current task's THREAD (phys) */ + addi r5,r2,THREAD oris r9,r9,MSR_VEC@h - tovirt(r5, r5) #else ld r4,PACACURRENT(r13) addi r5,r4,THREAD /* Get THREAD */ @@ -81,7 +80,6 @@ _GLOBAL(load_up_altivec) li r4,1 stb r4,THREAD_LOAD_VEC(r5) addi r6,r5,THREAD_VRSTATE - li r4,1 li r10,VRSTATE_VSCR stw r4,THREAD_USED_VR(r5) lvx v0,r10,r6 |