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-rw-r--r--arch/powerpc/kernel/asm-offsets.c4
-rw-r--r--arch/powerpc/kernel/ptrace.c29
-rw-r--r--arch/powerpc/kernel/signal_32.c59
-rw-r--r--arch/powerpc/kernel/signal_64.c32
-rw-r--r--include/asm-powerpc/processor.h18
5 files changed, 121 insertions, 21 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 8655c767035..92768d3006f 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -78,6 +78,10 @@ int main(void)
DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_VSX
+ DEFINE(THREAD_VSR0, offsetof(struct thread_struct, fpr));
+ DEFINE(THREAD_USED_VSR, offsetof(struct thread_struct, used_vsr));
+#endif /* CONFIG_VSX */
#ifdef CONFIG_PPC64
DEFINE(KSP_VSID, offsetof(struct thread_struct, ksp_vsid));
#else /* CONFIG_PPC64 */
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 59ff08704e9..70fbde84b83 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -215,29 +215,56 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
+#ifdef CONFIG_VSX
+ double buf[33];
+ int i;
+#endif
flush_fp_to_thread(target);
+#ifdef CONFIG_VSX
+ /* copy to local buffer then write that out */
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_FPR(i);
+ memcpy(&buf[32], &target->thread.fpscr, sizeof(double));
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+
+#else
BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
offsetof(struct thread_struct, TS_FPR(32)));
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.fpr, 0, -1);
+#endif
}
static int fpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
+#ifdef CONFIG_VSX
+ double buf[33];
+ int i;
+#endif
flush_fp_to_thread(target);
+#ifdef CONFIG_VSX
+ /* copy to local buffer then write that out */
+ i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ if (i)
+ return i;
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_FPR(i) = buf[i];
+ memcpy(&target->thread.fpscr, &buf[32], sizeof(double));
+ return 0;
+#else
BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
offsetof(struct thread_struct, TS_FPR(32)));
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fpr, 0, -1);
+#endif
}
-
#ifdef CONFIG_ALTIVEC
/*
* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index b057e6852a7..f7fa395b9fb 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -337,14 +337,16 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
int sigret)
{
unsigned long msr = regs->msr;
+#ifdef CONFIG_VSX
+ double buf[32];
+ int i;
+#endif
/* Make sure floating point registers are stored in regs */
flush_fp_to_thread(current);
- /* save general and floating-point registers */
- if (save_general_regs(regs, frame) ||
- __copy_to_user(&frame->mc_fregs, current->thread.fpr,
- ELF_NFPREG * sizeof(double)))
+ /* save general registers */
+ if (save_general_regs(regs, frame))
return 1;
#ifdef CONFIG_ALTIVEC
@@ -368,7 +370,20 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
if (__put_user(current->thread.vrsave, (u32 __user *)&frame->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
-
+#ifdef CONFIG_VSX
+ /* save FPR copy to local buffer then write to the thread_struct */
+ flush_fp_to_thread(current);
+ for (i = 0; i < 32 ; i++)
+ buf[i] = current->thread.TS_FPR(i);
+ memcpy(&buf[i], &current->thread.fpscr, sizeof(double));
+ if (__copy_to_user(&frame->mc_fregs, buf, ELF_NFPREG * sizeof(double)))
+ return 1;
+#else
+ /* save floating-point registers */
+ if (__copy_to_user(&frame->mc_fregs, current->thread.fpr,
+ ELF_NFPREG * sizeof(double)))
+ return 1;
+#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
/* save spe registers */
if (current->thread.used_spe) {
@@ -411,6 +426,10 @@ static long restore_user_regs(struct pt_regs *regs,
long err;
unsigned int save_r2 = 0;
unsigned long msr;
+#ifdef CONFIG_VSX
+ double buf[32];
+ int i;
+#endif
/*
* restore general registers but not including MSR or SOFTE. Also
@@ -438,16 +457,11 @@ static long restore_user_regs(struct pt_regs *regs,
*/
discard_lazy_cpu_state();
- /* force the process to reload the FP registers from
- current->thread when it next does FP instructions */
- regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1);
- if (__copy_from_user(current->thread.fpr, &sr->mc_fregs,
- sizeof(sr->mc_fregs)))
- return 1;
-
#ifdef CONFIG_ALTIVEC
- /* force the process to reload the altivec registers from
- current->thread when it next does altivec instructions */
+ /*
+ * Force the process to reload the altivec registers from
+ * current->thread when it next does altivec instructions
+ */
regs->msr &= ~MSR_VEC;
if (msr & MSR_VEC) {
/* restore altivec registers from the stack */
@@ -462,6 +476,23 @@ static long restore_user_regs(struct pt_regs *regs,
return 1;
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_VSX
+ if (__copy_from_user(buf, &sr->mc_fregs,sizeof(sr->mc_fregs)))
+ return 1;
+ for (i = 0; i < 32 ; i++)
+ current->thread.TS_FPR(i) = buf[i];
+ memcpy(&current->thread.fpscr, &buf[i], sizeof(double));
+#else
+ if (__copy_from_user(current->thread.fpr, &sr->mc_fregs,
+ sizeof(sr->mc_fregs)))
+ return 1;
+#endif /* CONFIG_VSX */
+ /*
+ * force the process to reload the FP registers from
+ * current->thread when it next does FP instructions
+ */
+ regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1);
+
#ifdef CONFIG_SPE
/* force the process to reload the spe registers from
current->thread when it next does spe instructions */
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index da7c058e373..a587b33cd6b 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -89,6 +89,10 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
#endif
unsigned long msr = regs->msr;
long err = 0;
+#ifdef CONFIG_VSX
+ double buf[FP_REGS_SIZE];
+ int i;
+#endif
flush_fp_to_thread(current);
@@ -112,11 +116,21 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
#else /* CONFIG_ALTIVEC */
err |= __put_user(0, &sc->v_regs);
#endif /* CONFIG_ALTIVEC */
+ flush_fp_to_thread(current);
+#ifdef CONFIG_VSX
+ /* Copy FP to local buffer then write that out */
+ for (i = 0; i < 32 ; i++)
+ buf[i] = current->thread.TS_FPR(i);
+ memcpy(&buf[i], &current->thread.fpscr, sizeof(double));
+ err |= __copy_to_user(&sc->fp_regs, buf, FP_REGS_SIZE);
+#else /* CONFIG_VSX */
+ /* copy fpr regs and fpscr */
+ err |= __copy_to_user(&sc->fp_regs, &current->thread.fpr, FP_REGS_SIZE);
+#endif /* CONFIG_VSX */
err |= __put_user(&sc->gp_regs, &sc->regs);
WARN_ON(!FULL_REGS(regs));
err |= __copy_to_user(&sc->gp_regs, regs, GP_REGS_SIZE);
err |= __put_user(msr, &sc->gp_regs[PT_MSR]);
- err |= __copy_to_user(&sc->fp_regs, &current->thread.fpr, FP_REGS_SIZE);
err |= __put_user(signr, &sc->signal);
err |= __put_user(handler, &sc->handler);
if (set != NULL)
@@ -135,6 +149,9 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
#ifdef CONFIG_ALTIVEC
elf_vrreg_t __user *v_regs;
#endif
+#ifdef CONFIG_VSX
+ double buf[FP_REGS_SIZE];
+#endif
unsigned long err = 0;
unsigned long save_r13 = 0;
elf_greg_t *gregs = (elf_greg_t *)regs;
@@ -182,8 +199,6 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
*/
regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC);
- err |= __copy_from_user(&current->thread.fpr, &sc->fp_regs, FP_REGS_SIZE);
-
#ifdef CONFIG_ALTIVEC
err |= __get_user(v_regs, &sc->v_regs);
if (err)
@@ -202,7 +217,18 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
else
current->thread.vrsave = 0;
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_VSX
+ /* restore floating point */
+ err |= __copy_from_user(buf, &sc->fp_regs, FP_REGS_SIZE);
+ if (err)
+ return err;
+ for (i = 0; i < 32 ; i++)
+ current->thread.TS_FPR(i) = buf[i];
+ memcpy(&current->thread.fpscr, &buf[i], sizeof(double));
+#else
+ err |= __copy_from_user(&current->thread.fpr, &sc->fp_regs, FP_REGS_SIZE);
+#endif
return err;
}
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index a23da6356e0..e93e72df4bc 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -12,7 +12,11 @@
#include <asm/reg.h>
+#ifdef CONFIG_VSX
+#define TS_FPRWIDTH 2
+#else
#define TS_FPRWIDTH 1
+#endif
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
@@ -80,6 +84,7 @@ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
/* Lazy FPU handling on uni-processor */
extern struct task_struct *last_task_used_math;
extern struct task_struct *last_task_used_altivec;
+extern struct task_struct *last_task_used_vsx;
extern struct task_struct *last_task_used_spe;
#ifdef CONFIG_PPC32
@@ -142,7 +147,9 @@ typedef struct {
unsigned long seg;
} mm_segment_t;
-#define TS_FPR(i) fpr[i]
+#define TS_FPROFFSET 0
+#define TS_VSRLOWOFFSET 1
+#define TS_FPR(i) fpr[i][TS_FPROFFSET]
struct thread_struct {
unsigned long ksp; /* Kernel stack pointer */
@@ -160,8 +167,9 @@ struct thread_struct {
unsigned long dbcr0; /* debug control register values */
unsigned long dbcr1;
#endif
- double fpr[32]; /* Complete floating point set */
- struct { /* fpr ... fpscr must be contiguous */
+ /* FP and VSX 0-31 register set */
+ double fpr[32][TS_FPRWIDTH];
+ struct {
unsigned int pad;
unsigned int val; /* Floating point status */
@@ -181,6 +189,10 @@ struct thread_struct {
unsigned long vrsave;
int used_vr; /* set if process has used altivec */
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_VSX
+ /* VSR status */
+ int used_vsr; /* set if process has used altivec */
+#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
unsigned long evr[32]; /* upper 32-bits of SPE regs */
u64 acc; /* Accumulator */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 08:58:00 +0000