From dc4fbba11e4661a6a77a1f89ba32f9082e6395ff Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Thu, 29 Oct 2015 11:44:05 +1100 Subject: 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 Signed-off-by: Michael Ellerman --- arch/powerpc/crypto/aes-spe-glue.c | 1 + arch/powerpc/crypto/sha1-spe-glue.c | 1 + arch/powerpc/crypto/sha256-spe-glue.c | 1 + 3 files changed, 3 insertions(+) (limited to 'arch/powerpc/crypto') diff --git a/arch/powerpc/crypto/aes-spe-glue.c b/arch/powerpc/crypto/aes-spe-glue.c index bd5e63f..93ee046 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 3e1d222..f9ebc38 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 f4a616f..718a079 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(); } -- cgit v1.1