[PATCH 1/2] powerpc/e500: make load_up_spe a normal fuction

[PATCH 1/2] powerpc/e500: make load_up_spe a normal fuction

[Olivia Yin]

So that we can call it in kernel.

Signed-off-by: Liu Yu <yu.liu@freescale.com>
---
 arch/powerpc/kernel/head_fsl_booke.S |   23 ++++++-----------------
 1 files changed, 6 insertions(+), 17 deletions(-)

diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index d5d78c4..c96e025 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -539,8 +539,10 @@ interrupt_base:
 	/* SPE Unavailable */
 	START_EXCEPTION(SPEUnavailable)
 	NORMAL_EXCEPTION_PROLOG
-	bne	load_up_spe
-	addi	r3,r1,STACK_FRAME_OVERHEAD
+	beq	1f
+	bl	load_up_spe
+	b	fast_exception_return
+1:	addi	r3,r1,STACK_FRAME_OVERHEAD
 	EXC_XFER_EE_LITE(0x2010, KernelSPE)
 #else
 	EXCEPTION(0x2020, SPEUnavailable, unknown_exception, EXC_XFER_EE)
@@ -743,7 +745,7 @@ tlb_write_entry:
 /* Note that the SPE support is closely modeled after the AltiVec
  * support.  Changes to one are likely to be applicable to the
  * other!  */
-load_up_spe:
+_GLOBAL(load_up_spe)
 /*
  * Disable SPE for the task which had SPE previously,
  * and save its SPE registers in its thread_struct.
@@ -791,20 +793,7 @@ load_up_spe:
 	subi	r4,r5,THREAD
 	stw	r4,last_task_used_spe@l(r3)
 #endif /* !CONFIG_SMP */
-	/* restore registers and return */
-2:	REST_4GPRS(3, r11)
-	lwz	r10,_CCR(r11)
-	REST_GPR(1, r11)
-	mtcr	r10
-	lwz	r10,_LINK(r11)
-	mtlr	r10
-	REST_GPR(10, r11)
-	mtspr	SPRN_SRR1,r9
-	mtspr	SPRN_SRR0,r12
-	REST_GPR(9, r11)
-	REST_GPR(12, r11)
-	lwz	r11,GPR11(r11)
-	rfi
+	blr
 
 /*
  * SPE unavailable trap from kernel - print a message, but let
-- 
1.6.4

Re: [PATCH 1/2] powerpc/e500: make load_up_spe a normal fuction

[Tabi Timur-B04825]

On Mon, Feb 27, 2012 at 4:59 AM, Olivia Yin <hong-hua.yin@freescale.com> wr=
ote:
> So that we can call it in kernel.

And why would we want that?

--=20
Timur Tabi
Linux kernel developer at Freescale=

Re: [PATCH 1/2] powerpc/e500: make load_up_spe a normal fuction

[Scott Wood]

On 02/27/2012 04:59 AM, Olivia Yin wrote:
> So that we can call it in kernel.
> 
> Signed-off-by: Liu Yu <yu.liu@freescale.com>

Explain why we want this, and point out that this makes it similar to
load_up_fpu.

> ---
>  arch/powerpc/kernel/head_fsl_booke.S |   23 ++++++-----------------
>  1 files changed, 6 insertions(+), 17 deletions(-)

When posting a patch authored by someone else, more or less unchanged,
you should put a From: line in the body of the e-mail.

git send-email will do this automatically if you preserve the authorship
in the git commit.

Also, you should add your own Signed-off-by.

-Scott

RE: [PATCH 1/2] powerpc/e500: make load_up_spe a normal fuction

[Yin Olivia-R63875]

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Re: [PATCH 1/2] powerpc/e500: make load_up_spe a normal fuction

[Alexander Graf]

On 02/28/2012 08:09 AM, Yin Olivia-R63875 wrote:
> Hi Scott,
>
> This had been reviewed before and accepted by internal tree.
> http://linux.freescale.net/patchwork/patch/11100/
> http://git.am.freescale.net/gitolite/gitweb.cgi/sdk/kvm.git/commit/?h=for-sdk1.2&id=c5088844dc665dbdae4fa51b8d58dc203bacc17e
>
> I didn't change anything except the line.
> I just commit to external kvm-ppc mailing list. Should I add my own Signed-off-by?

Yes, if you just take a patch from someone else and direct it to another 
tree, you keep the From: line (git cherry-pick or git am should do that 
automatically for you) and add your own SOB-line (git am -s can do that 
for example).

Since you're also supposed to change the description, please note that 
between Yu's SOB line and your SOB line with something like

Signed-off-by: Liu Yu<yu.liu@freescale.com>
[olivia: change description]
Signed-off-by: Olivia Yin<r63875@freescale.com>



Alex