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-rw-r--r--arch/powerpc/kernel/ptrace.c1597
1 files changed, 1555 insertions, 42 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 060b140f0..bf91658a8 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -38,6 +38,7 @@
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/switch_to.h>
+#include <asm/tm.h>
#define CREATE_TRACE_POINTS
#include <trace/events/syscalls.h>
@@ -64,6 +65,10 @@ struct pt_regs_offset {
{.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
#define REG_OFFSET_END {.name = NULL, .offset = 0}
+#define TVSO(f) (offsetof(struct thread_vr_state, f))
+#define TFSO(f) (offsetof(struct thread_fp_state, f))
+#define TSO(f) (offsetof(struct thread_struct, f))
+
static const struct pt_regs_offset regoffset_table[] = {
GPR_OFFSET_NAME(0),
GPR_OFFSET_NAME(1),
@@ -114,6 +119,24 @@ static const struct pt_regs_offset regoffset_table[] = {
REG_OFFSET_END,
};
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+static void flush_tmregs_to_thread(struct task_struct *tsk)
+{
+ /*
+ * If task is not current, it will have been flushed already to
+ * it's thread_struct during __switch_to().
+ *
+ * A reclaim flushes ALL the state.
+ */
+
+ if (tsk == current && MSR_TM_SUSPENDED(mfmsr()))
+ tm_reclaim_current(TM_CAUSE_SIGNAL);
+
+}
+#else
+static inline void flush_tmregs_to_thread(struct task_struct *tsk) { }
+#endif
+
/**
* regs_query_register_offset() - query register offset from its name
* @name: the name of a register
@@ -181,6 +204,26 @@ static int set_user_msr(struct task_struct *task, unsigned long msr)
return 0;
}
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+static unsigned long get_user_ckpt_msr(struct task_struct *task)
+{
+ return task->thread.ckpt_regs.msr | task->thread.fpexc_mode;
+}
+
+static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr)
+{
+ task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE;
+ task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE;
+ return 0;
+}
+
+static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap)
+{
+ task->thread.ckpt_regs.trap = trap & 0xfff0;
+ return 0;
+}
+#endif
+
#ifdef CONFIG_PPC64
static int get_user_dscr(struct task_struct *task, unsigned long *data)
{
@@ -358,6 +401,29 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
return ret;
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which returns the current running values of
+ * all the FPR registers, needs to know whether any transaction is active
+ * or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ * };
+ *
+ * There are two config options CONFIG_VSX and CONFIG_PPC_TRANSACTIONAL_MEM
+ * which determines the final code in this function. All the combinations of
+ * these two config options are possible except the one below as transactional
+ * memory config pulls in CONFIG_VSX automatically.
+ *
+ * !defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ */
static int fpr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
@@ -368,14 +434,31 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
#endif
flush_fp_to_thread(target);
-#ifdef CONFIG_VSX
+#if defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ /* copy to local buffer then write that out */
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_TRANS_FPR(i);
+ buf[32] = target->thread.transact_fp.fpscr;
+ } else {
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_FPR(i);
+ buf[32] = target->thread.fp_state.fpscr;
+ }
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+#endif
+
+#if defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
/* copy to local buffer then write that out */
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.TS_FPR(i);
buf[32] = target->thread.fp_state.fpscr;
return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+#endif
-#else
+#if !defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));
@@ -384,6 +467,29 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
#endif
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which setss the current running values of
+ * all the FPR registers, needs to know whether any transaction is active
+ * or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ * };
+ *
+ * There are two config options CONFIG_VSX and CONFIG_PPC_TRANSACTIONAL_MEM
+ * which determines the final code in this function. All the combinations of
+ * these two config options are possible except the one below as transactional
+ * memory config pulls in CONFIG_VSX automatically.
+ *
+ * !defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ */
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)
@@ -394,7 +500,27 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
#endif
flush_fp_to_thread(target);
-#ifdef CONFIG_VSX
+#if defined(CONFIG_VSX) && defined(CONFIG_PPC_TRANSACTIONAL_MEM)
+ /* copy to local buffer then write that out */
+ i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ if (i)
+ return i;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_TRANS_FPR(i) = buf[i];
+ target->thread.transact_fp.fpscr = buf[32];
+ } else {
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_FPR(i) = buf[i];
+ target->thread.fp_state.fpscr = buf[32];
+ }
+ return 0;
+#endif
+
+#if defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
/* copy to local buffer then write that out */
i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
if (i)
@@ -403,7 +529,9 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
target->thread.TS_FPR(i) = buf[i];
target->thread.fp_state.fpscr = buf[32];
return 0;
-#else
+#endif
+
+#if !defined(CONFIG_VSX) && !defined(CONFIG_PPC_TRANSACTIONAL_MEM)
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32]));
@@ -433,10 +561,28 @@ static int vr_active(struct task_struct *target,
return target->thread.used_vr ? regset->n : 0;
}
+/*
+ * When the transaction is active, 'transact_vr' holds the current running
+ * value of all the VMX registers and 'vr_state' holds the last checkpointed
+ * value of all the VMX registers for the current transaction to fall back
+ * on in case it aborts. When transaction is not active 'vr_state' holds
+ * the current running state of all the VMX registers. So this function which
+ * gets the current running values of all the VMX registers, needs to know
+ * whether any transaction is active or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ * };
+ */
static int vr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
+ struct thread_vr_state *addr;
int ret;
flush_altivec_to_thread(target);
@@ -444,8 +590,19 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_fp_to_thread(target);
+ flush_tmregs_to_thread(target);
+ addr = &target->thread.transact_vr;
+ } else {
+ addr = &target->thread.vr_state;
+ }
+#else
+ addr = &target->thread.vr_state;
+#endif
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
+ addr, 0,
33 * sizeof(vector128));
if (!ret) {
/*
@@ -456,7 +613,16 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
u32 word;
} vrsave;
memset(&vrsave, 0, sizeof(vrsave));
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ vrsave.word = target->thread.transact_vrsave;
+ else
+ vrsave.word = target->thread.vrsave;
+#else
vrsave.word = target->thread.vrsave;
+#endif
+
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
33 * sizeof(vector128), -1);
}
@@ -464,10 +630,28 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
return ret;
}
+/*
+ * When the transaction is active, 'transact_vr' holds the current running
+ * value of all the VMX registers and 'vr_state' holds the last checkpointed
+ * value of all the VMX registers for the current transaction to fall back
+ * on in case it aborts. When transaction is not active 'vr_state' holds
+ * the current running state of all the VMX registers. So this function which
+ * sets the current running values of all the VMX registers, needs to know
+ * whether any transaction is active or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ * };
+ */
static int vr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
+ struct thread_vr_state *addr;
int ret;
flush_altivec_to_thread(target);
@@ -475,8 +659,19 @@ static int vr_set(struct task_struct *target, const struct user_regset *regset,
BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ flush_fp_to_thread(target);
+ flush_tmregs_to_thread(target);
+ addr = &target->thread.transact_vr;
+ } else {
+ addr = &target->thread.vr_state;
+ }
+#else
+ addr = &target->thread.vr_state;
+#endif
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
+ addr, 0,
33 * sizeof(vector128));
if (!ret && count > 0) {
/*
@@ -487,11 +682,28 @@ static int vr_set(struct task_struct *target, const struct user_regset *regset,
u32 word;
} vrsave;
memset(&vrsave, 0, sizeof(vrsave));
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ vrsave.word = target->thread.transact_vrsave;
+ else
+ vrsave.word = target->thread.vrsave;
+#else
vrsave.word = target->thread.vrsave;
+#endif
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
33 * sizeof(vector128), -1);
- if (!ret)
+ if (!ret) {
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ target->thread.transact_vrsave = vrsave.word;
+ else
+ target->thread.vrsave = vrsave.word;
+#else
target->thread.vrsave = vrsave.word;
+#endif
+ }
}
return ret;
@@ -512,6 +724,21 @@ static int vsr_active(struct task_struct *target,
return target->thread.used_vsr ? regset->n : 0;
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which returns the current running values of
+ * all the FPR registers, needs to know whether any transaction is active
+ * or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 vsx[32];
+ * };
+ */
static int vsr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
@@ -519,16 +746,47 @@ static int vsr_get(struct task_struct *target, const struct user_regset *regset,
u64 buf[32];
int ret, i;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+#endif
flush_vsx_to_thread(target);
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.
+ transact_fp.fpr[i][TS_VSRLOWOFFSET];
+ } else {
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.
+ fp_state.fpr[i][TS_VSRLOWOFFSET];
+ }
+#else
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
+#endif
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
buf, 0, 32 * sizeof(double));
return ret;
}
+/*
+ * When the transaction is active, 'transact_fp' holds the current running
+ * value of all FPR registers and 'fp_state' holds the last checkpointed
+ * value of all FPR registers for the current transaction. When transaction
+ * is not active 'fp_state' holds the current running state of all the FPR
+ * registers. So this function which sets the current running values of all
+ * the FPR registers, needs to know whether any transaction is active or not.
+ *
+ * Userspace interface buffer layout:
+ *
+ * struct data {
+ * u64 vsx[32];
+ * };
+ */
static int vsr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
@@ -536,12 +794,30 @@ static int vsr_set(struct task_struct *target, const struct user_regset *regset,
u64 buf[32];
int ret,i;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+#endif
flush_vsx_to_thread(target);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
buf, 0, 32 * sizeof(double));
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (MSR_TM_ACTIVE(target->thread.regs->msr)) {
+ for (i = 0; i < 32 ; i++)
+ target->thread.transact_fp.
+ fpr[i][TS_VSRLOWOFFSET] = buf[i];
+ } else {
+ for (i = 0; i < 32 ; i++)
+ target->thread.fp_state.
+ fpr[i][TS_VSRLOWOFFSET] = buf[i];
+ }
+#else
for (i = 0; i < 32 ; i++)
target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
+#endif
return ret;
@@ -614,8 +890,1030 @@ static int evr_set(struct task_struct *target, const struct user_regset *regset,
}
#endif /* CONFIG_SPE */
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+/**
+ * tm_cgpr_active - get active number of registers in CGPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed GPR category.
+ */
+static int tm_cgpr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cgpr_get - get CGPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets transaction checkpointed GPR registers.
+ *
+ * When the transaction is active, 'ckpt_regs' holds all the checkpointed
+ * GPR register values for the current transaction to fall back on if it
+ * aborts in between. This function gets those checkpointed GPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * struct pt_regs ckpt_regs;
+ * };
+ */
+static int tm_cgpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs,
+ 0, offsetof(struct pt_regs, msr));
+ if (!ret) {
+ unsigned long msr = get_user_ckpt_msr(target);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
+ offsetof(struct pt_regs, msr),
+ offsetof(struct pt_regs, msr) +
+ sizeof(msr));
+ }
+
+ BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
+ offsetof(struct pt_regs, msr) + sizeof(long));
+
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs.orig_gpr3,
+ offsetof(struct pt_regs, orig_gpr3),
+ sizeof(struct pt_regs));
+ if (!ret)
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
/*
+ * tm_cgpr_set - set the CGPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed GPR registers.
+ *
+ * When the transaction is active, 'ckpt_regs' holds the checkpointed
+ * GPR register values for the current transaction to fall back on if it
+ * aborts in between. This function sets those checkpointed GPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * struct pt_regs ckpt_regs;
+ * };
+ */
+static int tm_cgpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ unsigned long reg;
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs,
+ 0, PT_MSR * sizeof(reg));
+
+ if (!ret && count > 0) {
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
+ PT_MSR * sizeof(reg),
+ (PT_MSR + 1) * sizeof(reg));
+ if (!ret)
+ ret = set_user_ckpt_msr(target, reg);
+ }
+
+ BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
+ offsetof(struct pt_regs, msr) + sizeof(long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ckpt_regs.orig_gpr3,
+ PT_ORIG_R3 * sizeof(reg),
+ (PT_MAX_PUT_REG + 1) * sizeof(reg));
+
+ if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
+ ret = user_regset_copyin_ignore(
+ &pos, &count, &kbuf, &ubuf,
+ (PT_MAX_PUT_REG + 1) * sizeof(reg),
+ PT_TRAP * sizeof(reg));
+
+ if (!ret && count > 0) {
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
+ PT_TRAP * sizeof(reg),
+ (PT_TRAP + 1) * sizeof(reg));
+ if (!ret)
+ ret = set_user_ckpt_trap(target, reg);
+ }
+
+ if (!ret)
+ ret = user_regset_copyin_ignore(
+ &pos, &count, &kbuf, &ubuf,
+ (PT_TRAP + 1) * sizeof(reg), -1);
+
+ return ret;
+}
+
+/**
+ * tm_cfpr_active - get active number of registers in CFPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed FPR category.
+ */
+static int tm_cfpr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cfpr_get - get CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed FPR registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * values for the current transaction to fall back on if it aborts
+ * in between. This function gets those checkpointed FPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ *};
+ */
+static int tm_cfpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ u64 buf[33];
+ int i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* copy to local buffer then write that out */
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_FPR(i);
+ buf[32] = target->thread.fp_state.fpscr;
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+}
+
+/**
+ * tm_cfpr_set - set CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed FPR registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * FPR register values for the current transaction to fall back on
+ * if it aborts in between. This function sets these checkpointed
+ * FPR registers. The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ *};
+ */
+static int tm_cfpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ u64 buf[33];
+ int i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* 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];
+ target->thread.fp_state.fpscr = buf[32];
+ return 0;
+}
+
+/**
+ * tm_cvmx_active - get active number of registers in CVMX
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in checkpointed VMX category.
+ */
+static int tm_cvmx_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cvmx_get - get CMVX registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed VMX registers.
+ *
+ * When the transaction is active 'vr_state' and 'vr_save' hold
+ * the checkpointed values for the current transaction to fall
+ * back on if it aborts in between. The userspace interface buffer
+ * layout is as follows.
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ *};
+ */
+static int tm_cvmx_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ /* Flush the state */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.vr_state, 0,
+ 33 * sizeof(vector128));
+ if (!ret) {
+ /*
+ * Copy out only the low-order word of vrsave.
+ */
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
+ 33 * sizeof(vector128), -1);
+ }
+
+ return ret;
+}
+
+/**
+ * tm_cvmx_set - set CMVX registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed VMX registers.
+ *
+ * When the transaction is active 'vr_state' and 'vr_save' hold
+ * the checkpointed values for the current transaction to fall
+ * back on if it aborts in between. The userspace interface buffer
+ * layout is as follows.
+ *
+ * struct data {
+ * vector128 vr[32];
+ * vector128 vscr;
+ * vector128 vrsave;
+ *};
+ */
+static int tm_cvmx_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.vr_state, 0,
+ 33 * sizeof(vector128));
+ if (!ret && count > 0) {
+ /*
+ * We use only the low-order word of vrsave.
+ */
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
+ 33 * sizeof(vector128), -1);
+ if (!ret)
+ target->thread.vrsave = vrsave.word;
+ }
+
+ return ret;
+}
+
+/**
+ * tm_cvsx_active - get active number of registers in CVSX
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed VSX category.
+ */
+static int tm_cvsx_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ flush_vsx_to_thread(target);
+ return target->thread.used_vsr ? regset->n : 0;
+}
+
+/**
+ * tm_cvsx_get - get CVSX registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed VSX registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * values for the current transaction to fall back on if it aborts
+ * in between. This function gets those checkpointed VSX registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 vsx[32];
+ *};
+ */
+static int tm_cvsx_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ u64 buf[32];
+ int ret, i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ /* Flush the state */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ flush_vsx_to_thread(target);
+
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ buf, 0, 32 * sizeof(double));
+
+ return ret;
+}
+
+/**
+ * tm_cvsx_set - set CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed VSX registers.
+ *
+ * When the transaction is active 'fp_state' holds the checkpointed
+ * VSX register values for the current transaction to fall back on
+ * if it aborts in between. This function sets these checkpointed
+ * FPR registers. The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 vsx[32];
+ *};
+ */
+static int tm_cvsx_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ u64 buf[32];
+ int ret, i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ /* Flush the state */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+ flush_vsx_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ buf, 0, 32 * sizeof(double));
+ for (i = 0; i < 32 ; i++)
+ target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
+
+ return ret;
+}
+
+/**
+ * tm_spr_active - get active number of registers in TM SPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks the active number of available
+ * regisers in the transactional memory SPR category.
+ */
+static int tm_spr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ return regset->n;
+}
+
+/**
+ * tm_spr_get - get the TM related SPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets transactional memory related SPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct {
+ * u64 tm_tfhar;
+ * u64 tm_texasr;
+ * u64 tm_tfiar;
+ * };
+ */
+static int tm_spr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
+ BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
+ BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ /* Flush the states */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* TFHAR register */
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfhar, 0, sizeof(u64));
+
+ /* TEXASR register */
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_texasr, sizeof(u64),
+ 2 * sizeof(u64));
+
+ /* TFIAR register */
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfiar,
+ 2 * sizeof(u64), 3 * sizeof(u64));
+ return ret;
+}
+
+/**
+ * tm_spr_set - set the TM related SPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets transactional memory related SPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct {
+ * u64 tm_tfhar;
+ * u64 tm_texasr;
+ * u64 tm_tfiar;
+ * };
+ */
+static int tm_spr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
+ BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
+ BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ /* Flush the states */
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* TFHAR register */
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfhar, 0, sizeof(u64));
+
+ /* TEXASR register */
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_texasr, sizeof(u64),
+ 2 * sizeof(u64));
+
+ /* TFIAR register */
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tfiar,
+ 2 * sizeof(u64), 3 * sizeof(u64));
+ return ret;
+}
+
+static int tm_tar_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ return regset->n;
+
+ return 0;
+}
+
+static int tm_tar_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tar, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_tar_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_tar, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_ppr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ return regset->n;
+
+ return 0;
+}
+
+
+static int tm_ppr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_ppr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_dscr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (MSR_TM_ACTIVE(target->thread.regs->msr))
+ return regset->n;
+
+ return 0;
+}
+
+static int tm_dscr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_dscr, 0, sizeof(u64));
+ return ret;
+}
+
+static int tm_dscr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tm_dscr, 0, sizeof(u64));
+ return ret;
+}
+#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
+
+#ifdef CONFIG_PPC64
+static int ppr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int ppr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ppr, 0, sizeof(u64));
+ return ret;
+}
+
+static int dscr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.dscr, 0, sizeof(u64));
+ return ret;
+}
+static int dscr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.dscr, 0, sizeof(u64));
+ return ret;
+}
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+static int tar_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tar, 0, sizeof(u64));
+ return ret;
+}
+static int tar_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.tar, 0, sizeof(u64));
+ return ret;
+}
+
+static int ebb_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ if (target->thread.used_ebb)
+ return regset->n;
+
+ return 0;
+}
+
+static int ebb_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ /* Build tests */
+ BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
+ BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ if (!target->thread.used_ebb)
+ return -ENODATA;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ebbrr, 0, 3 * sizeof(unsigned long));
+}
+
+static int ebb_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret = 0;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
+ BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ if (target->thread.used_ebb)
+ return -ENODATA;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ebbrr, 0, sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.ebbhr, sizeof(unsigned long),
+ 2 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.bescr,
+ 2 * sizeof(unsigned long), 3 * sizeof(unsigned long));
+
+ return ret;
+}
+static int pmu_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ return regset->n;
+}
+
+static int pmu_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ /* Build tests */
+ BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
+ BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
+ BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
+ BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.siar, 0,
+ 5 * sizeof(unsigned long));
+}
+
+static int pmu_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret = 0;
+
+ /* Build tests */
+ BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
+ BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
+ BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
+ BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return -ENODEV;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.siar, 0,
+ sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.sdar, sizeof(unsigned long),
+ 2 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.sier, 2 * sizeof(unsigned long),
+ 3 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.mmcr2, 3 * sizeof(unsigned long),
+ 4 * sizeof(unsigned long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.mmcr0, 4 * sizeof(unsigned long),
+ 5 * sizeof(unsigned long));
+ return ret;
+}
+#endif
+/*
* These are our native regset flavors.
*/
enum powerpc_regset {
@@ -630,6 +1928,25 @@ enum powerpc_regset {
#ifdef CONFIG_SPE
REGSET_SPE,
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ REGSET_TM_CGPR, /* TM checkpointed GPR registers */
+ REGSET_TM_CFPR, /* TM checkpointed FPR registers */
+ REGSET_TM_CVMX, /* TM checkpointed VMX registers */
+ REGSET_TM_CVSX, /* TM checkpointed VSX registers */
+ REGSET_TM_SPR, /* TM specific SPR registers */
+ REGSET_TM_CTAR, /* TM checkpointed TAR register */
+ REGSET_TM_CPPR, /* TM checkpointed PPR register */
+ REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
+#endif
+#ifdef CONFIG_PPC64
+ REGSET_PPR, /* PPR register */
+ REGSET_DSCR, /* DSCR register */
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+ REGSET_TAR, /* TAR register */
+ REGSET_EBB, /* EBB registers */
+ REGSET_PMR, /* Performance Monitor Registers */
+#endif
};
static const struct user_regset native_regsets[] = {
@@ -664,6 +1981,77 @@ static const struct user_regset native_regsets[] = {
.active = evr_active, .get = evr_get, .set = evr_set
},
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ [REGSET_TM_CGPR] = {
+ .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
+ .size = sizeof(long), .align = sizeof(long),
+ .active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
+ },
+ [REGSET_TM_CFPR] = {
+ .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ },
+ [REGSET_TM_CVMX] = {
+ .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
+ .size = sizeof(vector128), .align = sizeof(vector128),
+ .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
+ },
+ [REGSET_TM_CVSX] = {
+ .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
+ },
+ [REGSET_TM_SPR] = {
+ .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
+ },
+ [REGSET_TM_CTAR] = {
+ .core_note_type = NT_PPC_TM_CTAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
+ },
+ [REGSET_TM_CPPR] = {
+ .core_note_type = NT_PPC_TM_CPPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
+ },
+ [REGSET_TM_CDSCR] = {
+ .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
+ },
+#endif
+#ifdef CONFIG_PPC64
+ [REGSET_PPR] = {
+ .core_note_type = NT_PPC_PPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = ppr_get, .set = ppr_set
+ },
+ [REGSET_DSCR] = {
+ .core_note_type = NT_PPC_DSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = dscr_get, .set = dscr_set
+ },
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+ [REGSET_TAR] = {
+ .core_note_type = NT_PPC_TAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = tar_get, .set = tar_set
+ },
+ [REGSET_EBB] = {
+ .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = ebb_active, .get = ebb_get, .set = ebb_set
+ },
+ [REGSET_PMR] = {
+ .core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = pmu_active, .get = pmu_get, .set = pmu_set
+ },
+#endif
};
static const struct user_regset_view user_ppc_native_view = {
@@ -674,24 +2062,35 @@ static const struct user_regset_view user_ppc_native_view = {
#ifdef CONFIG_PPC64
#include <linux/compat.h>
-static int gpr32_get(struct task_struct *target,
+static int gpr32_get_common(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ void *kbuf, void __user *ubuf, bool tm_active)
{
const unsigned long *regs = &target->thread.regs->gpr[0];
+ const unsigned long *ckpt_regs;
compat_ulong_t *k = kbuf;
compat_ulong_t __user *u = ubuf;
compat_ulong_t reg;
int i;
- if (target->thread.regs == NULL)
- return -EIO;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ ckpt_regs = &target->thread.ckpt_regs.gpr[0];
+#endif
+ if (tm_active) {
+ regs = ckpt_regs;
+ } else {
+ if (target->thread.regs == NULL)
+ return -EIO;
- if (!FULL_REGS(target->thread.regs)) {
- /* We have a partial register set. Fill 14-31 with bogus values */
- for (i = 14; i < 32; i++)
- target->thread.regs->gpr[i] = NV_REG_POISON;
+ if (!FULL_REGS(target->thread.regs)) {
+ /*
+ * We have a partial register set.
+ * Fill 14-31 with bogus values.
+ */
+ for (i = 14; i < 32; i++)
+ target->thread.regs->gpr[i] = NV_REG_POISON;
+ }
}
pos /= sizeof(reg);
@@ -731,20 +2130,31 @@ static int gpr32_get(struct task_struct *target,
PT_REGS_COUNT * sizeof(reg), -1);
}
-static int gpr32_set(struct task_struct *target,
+static int gpr32_set_common(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
+ const void *kbuf, const void __user *ubuf, bool tm_active)
{
unsigned long *regs = &target->thread.regs->gpr[0];
+ unsigned long *ckpt_regs;
const compat_ulong_t *k = kbuf;
const compat_ulong_t __user *u = ubuf;
compat_ulong_t reg;
- if (target->thread.regs == NULL)
- return -EIO;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ ckpt_regs = &target->thread.ckpt_regs.gpr[0];
+#endif
- CHECK_FULL_REGS(target->thread.regs);
+ if (tm_active) {
+ regs = ckpt_regs;
+ } else {
+ regs = &target->thread.regs->gpr[0];
+
+ if (target->thread.regs == NULL)
+ return -EIO;
+
+ CHECK_FULL_REGS(target->thread.regs);
+ }
pos /= sizeof(reg);
count /= sizeof(reg);
@@ -804,6 +2214,40 @@ static int gpr32_set(struct task_struct *target,
(PT_TRAP + 1) * sizeof(reg), -1);
}
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+static int tm_cgpr32_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 1);
+}
+
+static int tm_cgpr32_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, 1);
+}
+#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
+
+static int gpr32_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 0);
+}
+
+static int gpr32_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, 0);
+}
+
/*
* These are the regset flavors matching the CONFIG_PPC32 native set.
*/
@@ -832,6 +2276,73 @@ static const struct user_regset compat_regsets[] = {
.active = evr_active, .get = evr_get, .set = evr_set
},
#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ [REGSET_TM_CGPR] = {
+ .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
+ .size = sizeof(long), .align = sizeof(long),
+ .active = tm_cgpr_active,
+ .get = tm_cgpr32_get, .set = tm_cgpr32_set
+ },
+ [REGSET_TM_CFPR] = {
+ .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ },
+ [REGSET_TM_CVMX] = {
+ .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
+ .size = sizeof(vector128), .align = sizeof(vector128),
+ .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
+ },
+ [REGSET_TM_CVSX] = {
+ .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
+ },
+ [REGSET_TM_SPR] = {
+ .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
+ },
+ [REGSET_TM_CTAR] = {
+ .core_note_type = NT_PPC_TM_CTAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
+ },
+ [REGSET_TM_CPPR] = {
+ .core_note_type = NT_PPC_TM_CPPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
+ },
+ [REGSET_TM_CDSCR] = {
+ .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
+ },
+#endif
+#ifdef CONFIG_PPC64
+ [REGSET_PPR] = {
+ .core_note_type = NT_PPC_PPR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = ppr_get, .set = ppr_set
+ },
+ [REGSET_DSCR] = {
+ .core_note_type = NT_PPC_DSCR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = dscr_get, .set = dscr_set
+ },
+#endif
+#ifdef CONFIG_PPC_BOOK3S_64
+ [REGSET_TAR] = {
+ .core_note_type = NT_PPC_TAR, .n = 1,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .get = tar_get, .set = tar_set
+ },
+ [REGSET_EBB] = {
+ .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
+ .size = sizeof(u64), .align = sizeof(u64),
+ .active = ebb_active, .get = ebb_get, .set = ebb_set
+ },
+#endif
};
static const struct user_regset_view user_ppc_compat_view = {
@@ -1783,12 +3294,12 @@ static int do_seccomp(struct pt_regs *regs)
* have already loaded -ENOSYS into r3, or seccomp has put
* something else in r3 (via SECCOMP_RET_ERRNO/TRACE).
*/
- if (__secure_computing())
+ if (__secure_computing(NULL))
return -1;
/*
* The syscall was allowed by seccomp, restore the register
- * state to what ptrace and audit expect.
+ * state to what audit expects.
* Note that we use orig_gpr3, which means a seccomp tracer can
* modify the first syscall parameter (in orig_gpr3) and also
* allow the syscall to proceed.
@@ -1822,22 +3333,25 @@ static inline int do_seccomp(struct pt_regs *regs) { return 0; }
*/
long do_syscall_trace_enter(struct pt_regs *regs)
{
- bool abort = false;
-
user_exit();
+ /*
+ * The tracer may decide to abort the syscall, if so tracehook
+ * will return !0. Note that the tracer may also just change
+ * regs->gpr[0] to an invalid syscall number, that is handled
+ * below on the exit path.
+ */
+ if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+ tracehook_report_syscall_entry(regs))
+ goto skip;
+
+ /* Run seccomp after ptrace; allow it to set gpr[3]. */
if (do_seccomp(regs))
return -1;
- if (test_thread_flag(TIF_SYSCALL_TRACE)) {
- /*
- * The tracer may decide to abort the syscall, if so tracehook
- * will return !0. Note that the tracer may also just change
- * regs->gpr[0] to an invalid syscall number, that is handled
- * below on the exit path.
- */
- abort = tracehook_report_syscall_entry(regs) != 0;
- }
+ /* Avoid trace and audit when syscall is invalid. */
+ if (regs->gpr[0] >= NR_syscalls)
+ goto skip;
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->gpr[0]);
@@ -1854,17 +3368,16 @@ long do_syscall_trace_enter(struct pt_regs *regs)
regs->gpr[5] & 0xffffffff,
regs->gpr[6] & 0xffffffff);
- if (abort || regs->gpr[0] >= NR_syscalls) {
- /*
- * If we are aborting explicitly, or if the syscall number is
- * now invalid, set the return value to -ENOSYS.
- */
- regs->gpr[3] = -ENOSYS;
- return -1;
- }
-
/* Return the possibly modified but valid syscall number */
return regs->gpr[0];
+
+skip:
+ /*
+ * If we are aborting explicitly, or if the syscall number is
+ * now invalid, set the return value to -ENOSYS.
+ */
+ regs->gpr[3] = -ENOSYS;
+ return -1;
}
void do_syscall_trace_leave(struct pt_regs *regs)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-13 12:48:47 +0000