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-rw-r--r--arch/powerpc/kernel/signal_32.c9
-rw-r--r--arch/powerpc/kernel/signal_64.c8
-rw-r--r--arch/powerpc/kernel/tm.S4
3 files changed, 19 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 0f83122e6676..bebdf1a1a540 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -436,7 +436,10 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
* use altivec. Since VSCR only contains 32 bits saved in the least
* significant bits of a vector, we "cheat" and stuff VRSAVE in the
* most significant bits of that same vector. --BenH
+ * Note that the current VRSAVE value is in the SPR at this point.
*/
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ current->thread.vrsave = mfspr(SPRN_VRSAVE);
if (__put_user(current->thread.vrsave, (u32 __user *)&frame->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
@@ -557,6 +560,8 @@ static int save_tm_user_regs(struct pt_regs *regs,
* significant bits of a vector, we "cheat" and stuff VRSAVE in the
* most significant bits of that same vector. --BenH
*/
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ current->thread.vrsave = mfspr(SPRN_VRSAVE);
if (__put_user(current->thread.vrsave,
(u32 __user *)&frame->mc_vregs[32]))
return 1;
@@ -696,6 +701,8 @@ static long restore_user_regs(struct pt_regs *regs,
/* Always get VRSAVE back */
if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
return 1;
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ mtspr(SPRN_VRSAVE, current->thread.vrsave);
#endif /* CONFIG_ALTIVEC */
if (copy_fpr_from_user(current, &sr->mc_fregs))
return 1;
@@ -809,6 +816,8 @@ static long restore_tm_user_regs(struct pt_regs *regs,
__get_user(current->thread.transact_vrsave,
(u32 __user *)&tm_sr->mc_vregs[32]))
return 1;
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ mtspr(SPRN_VRSAVE, current->thread.vrsave);
#endif /* CONFIG_ALTIVEC */
regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1);
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index cbd26928e04d..d0106b8a7484 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -114,6 +114,8 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
/* We always copy to/from vrsave, it's 0 if we don't have or don't
* use altivec.
*/
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ current->thread.vrsave = mfspr(SPRN_VRSAVE);
err |= __put_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
#else /* CONFIG_ALTIVEC */
err |= __put_user(0, &sc->v_regs);
@@ -217,6 +219,8 @@ static long setup_tm_sigcontexts(struct sigcontext __user *sc,
/* We always copy to/from vrsave, it's 0 if we don't have or don't
* use altivec.
*/
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ current->thread.vrsave = mfspr(SPRN_VRSAVE);
err |= __put_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
if (msr & MSR_VEC)
err |= __put_user(current->thread.transact_vrsave,
@@ -356,6 +360,8 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
else
current->thread.vrsave = 0;
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ mtspr(SPRN_VRSAVE, current->thread.vrsave);
#endif /* CONFIG_ALTIVEC */
/* restore floating point */
err |= copy_fpr_from_user(current, &sc->fp_regs);
@@ -484,6 +490,8 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
current->thread.vrsave = 0;
current->thread.transact_vrsave = 0;
}
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ mtspr(SPRN_VRSAVE, current->thread.vrsave);
#endif /* CONFIG_ALTIVEC */
/* restore floating point */
err |= copy_fpr_from_user(current, &sc->fp_regs);
diff --git a/arch/powerpc/kernel/tm.S b/arch/powerpc/kernel/tm.S
index 51be8fb24803..e2145b222f83 100644
--- a/arch/powerpc/kernel/tm.S
+++ b/arch/powerpc/kernel/tm.S
@@ -155,10 +155,10 @@ _GLOBAL(tm_reclaim)
mfvscr vr0
li r6, THREAD_TRANSACT_VSCR
stvx vr0, r3, r6
+dont_backup_vec:
mfspr r0, SPRN_VRSAVE
std r0, THREAD_TRANSACT_VRSAVE(r3)
-dont_backup_vec:
andi. r0, r4, MSR_FP
beq dont_backup_fp
@@ -331,11 +331,11 @@ _GLOBAL(tm_recheckpoint)
lvx vr0, r3, r5
mtvscr vr0
REST_32VRS(0, r5, r3) /* r5 scratch, r3 THREAD ptr */
+dont_restore_vec:
ld r5, THREAD_VRSAVE(r3)
mtspr SPRN_VRSAVE, r5
#endif
-dont_restore_vec:
andi. r0, r4, MSR_FP
beq dont_restore_fp