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(parent: 8792468) | patch
powerpc: Add the ability to save Altivec without giving it up
authorCyril Bur <cyrilbur@gmail.com>
Mon, 29 Feb 2016 06:53:50 +0000 (17:53 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 2 Mar 2016 12:34:49 +0000 (23:34 +1100)
commit6f515d842e8e1b205e54f44b9013bf14870b97a7
tree34f133da5b1cd6922f2728645db025bcc81b4183tree
parent8792468da5e12e77e76e1edf081acf0392abb331commit | diff
powerpc: Add the ability to save Altivec without giving it up

This patch adds the ability to be able to save the VEC registers to the
thread struct without giving up (disabling the facility) next time the
process returns to userspace.

This patch builds on a previous optimisation for the FPU registers in the
thread copy path to avoid a possibly pointless reload of VEC state.

Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/include/asm/switch_to.h diff | blob | history
arch/powerpc/kernel/process.c diff | blob | history
arch/powerpc/kernel/vector.S diff | blob | history
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