[PATCH] powerpc: Fix asm offsets to point to actual FP and VMX regs

[PATCH] powerpc: Fix asm offsets to point to actual FP and VMX regs

[Michael Neuling]

The asm code assumes the FP regs are at the start of fp_state. While
this is true now, it may not always be the case and there is nothing
enforcing it.

This fixes the asm-offsets to point to the actual FP registers inside
the fp_state.  Similarly for VMX.

Signed-off-by: Michael Neuling <mikey@neuling.org>
---
 arch/powerpc/kernel/asm-offsets.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 439c257dec..ef1b873fae 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -100,12 +100,12 @@ int main(void)
 	OFFSET(THREAD_NORMSAVES, thread_struct, normsave[0]);
 #endif
 	OFFSET(THREAD_FPEXC_MODE, thread_struct, fpexc_mode);
-	OFFSET(THREAD_FPSTATE, thread_struct, fp_state);
+	OFFSET(THREAD_FPSTATE, thread_struct, fp_state.fpr);
 	OFFSET(THREAD_FPSAVEAREA, thread_struct, fp_save_area);
 	OFFSET(FPSTATE_FPSCR, thread_fp_state, fpscr);
 	OFFSET(THREAD_LOAD_FP, thread_struct, load_fp);
 #ifdef CONFIG_ALTIVEC
-	OFFSET(THREAD_VRSTATE, thread_struct, vr_state);
+	OFFSET(THREAD_VRSTATE, thread_struct, vr_state.vr);
 	OFFSET(THREAD_VRSAVEAREA, thread_struct, vr_save_area);
 	OFFSET(THREAD_VRSAVE, thread_struct, vrsave);
 	OFFSET(THREAD_USED_VR, thread_struct, used_vr);
@@ -145,9 +145,9 @@ int main(void)
 	OFFSET(THREAD_TM_PPR, thread_struct, tm_ppr);
 	OFFSET(THREAD_TM_DSCR, thread_struct, tm_dscr);
 	OFFSET(PT_CKPT_REGS, thread_struct, ckpt_regs);
-	OFFSET(THREAD_CKVRSTATE, thread_struct, ckvr_state);
+	OFFSET(THREAD_CKVRSTATE, thread_struct, ckvr_state.vr);
 	OFFSET(THREAD_CKVRSAVE, thread_struct, ckvrsave);
-	OFFSET(THREAD_CKFPSTATE, thread_struct, ckfp_state);
+	OFFSET(THREAD_CKFPSTATE, thread_struct, ckfp_state.fpr);
 	/* Local pt_regs on stack for Transactional Memory funcs. */
 	DEFINE(TM_FRAME_SIZE, STACK_FRAME_OVERHEAD +
 	       sizeof(struct pt_regs) + 16);
-- 
2.11.0

Re: powerpc: Fix asm offsets to point to actual FP and VMX regs

[Michael Ellerman]

On Mon, 2017-05-08 at 06:23:31 UTC, Michael Neuling wrote:
> The asm code assumes the FP regs are at the start of fp_state. While
> this is true now, it may not always be the case and there is nothing
> enforcing it.
> 
> This fixes the asm-offsets to point to the actual FP registers inside
> the fp_state.  Similarly for VMX.
> 
> Signed-off-by: Michael Neuling <mikey@neuling.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/aa9a95163638bd9acb3e1f61f48cd5

cheers