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| author | Anton Blanchard | 2015-10-29 01:44:05 +0100 |
|---|---|---|
| committer | Michael Ellerman | 2015-12-01 03:52:25 +0100 |
| commit | dc4fbba11e4661a6a77a1f89ba32f9082e6395ff (patch) | |
| tree | 567037dc8e93063615e558eda1c80f8a82154749 /arch/powerpc/crypto | |
| parent | powerpc: Create msr_check_and_{set,clear}() (diff) | |
| download | kernel-qcow2-linux-dc4fbba11e4661a6a77a1f89ba32f9082e6395ff.tar.gz kernel-qcow2-linux-dc4fbba11e4661a6a77a1f89ba32f9082e6395ff.tar.xz kernel-qcow2-linux-dc4fbba11e4661a6a77a1f89ba32f9082e6395ff.zip | |
powerpc: Create disable_kernel_{fp,altivec,vsx,spe}()
The enable_kernel_*() functions leave the relevant MSR bits enabled
until we exit the kernel sometime later. Create disable versions
that wrap the kernel use of FP, Altivec VSX or SPE.
While we don't want to disable it normally for performance reasons
(MSR writes are slow), it will be used for a debug boot option that
does this and catches bad uses in other areas of the kernel.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/crypto')
| -rw-r--r-- | arch/powerpc/crypto/aes-spe-glue.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/crypto/sha1-spe-glue.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/crypto/sha256-spe-glue.c | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/crypto/aes-spe-glue.c b/arch/powerpc/crypto/aes-spe-glue.c index bd5e63f72ad4..93ee046d12cd 100644 --- a/arch/powerpc/crypto/aes-spe-glue.c +++ b/arch/powerpc/crypto/aes-spe-glue.c @@ -85,6 +85,7 @@ static void spe_begin(void) static void spe_end(void) { + disable_kernel_spe(); /* reenable preemption */ preempt_enable(); } diff --git a/arch/powerpc/crypto/sha1-spe-glue.c b/arch/powerpc/crypto/sha1-spe-glue.c index 3e1d22212521..f9ebc38d3fe7 100644 --- a/arch/powerpc/crypto/sha1-spe-glue.c +++ b/arch/powerpc/crypto/sha1-spe-glue.c @@ -46,6 +46,7 @@ static void spe_begin(void) static void spe_end(void) { + disable_kernel_spe(); /* reenable preemption */ preempt_enable(); } diff --git a/arch/powerpc/crypto/sha256-spe-glue.c b/arch/powerpc/crypto/sha256-spe-glue.c index f4a616fe1a82..718a079dcdbf 100644 --- a/arch/powerpc/crypto/sha256-spe-glue.c +++ b/arch/powerpc/crypto/sha256-spe-glue.c @@ -47,6 +47,7 @@ static void spe_begin(void) static void spe_end(void) { + disable_kernel_spe(); /* reenable preemption */ preempt_enable(); } |