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Commit 95791988 authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Alexander Graf
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powerpc: move debug registers in a structure 

This way we can use same data type struct with KVM and
also help in using other debug related function.
Signed-off-by: default avatarBharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 6b3e3b31
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Inline Side-by-side
Showing with 147 additions and 140 deletions
arch/powerpc/include/asm/processor.h
View file @ 95791988
......@@ -147,22 +147,7 @@ typedef struct {
#define TS_FPR(i) fpr[i][TS_FPROFFSET]
#define TS_TRANS_FPR(i) transact_fpr[i][TS_FPROFFSET]
struct thread_struct {
unsigned long ksp; /* Kernel stack pointer */
unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */
#ifdef CONFIG_PPC64
unsigned long ksp_vsid;
#endif
struct pt_regs *regs; /* Pointer to saved register state */
mm_segment_t fs; /* for get_fs() validation */
#ifdef CONFIG_BOOKE
/* BookE base exception scratch space; align on cacheline */
unsigned long normsave[8] ____cacheline_aligned;
#endif
#ifdef CONFIG_PPC32
void *pgdir; /* root of page-table tree */
#endif
struct debug_reg {
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
/*
* The following help to manage the use of Debug Control Registers
......@@ -199,6 +184,27 @@ struct thread_struct {
unsigned long dvc2;
#endif
#endif
};
struct thread_struct {
unsigned long ksp; /* Kernel stack pointer */
unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */
#ifdef CONFIG_PPC64
unsigned long ksp_vsid;
#endif
struct pt_regs *regs; /* Pointer to saved register state */
mm_segment_t fs; /* for get_fs() validation */
#ifdef CONFIG_BOOKE
/* BookE base exception scratch space; align on cacheline */
unsigned long normsave[8] ____cacheline_aligned;
#endif
#ifdef CONFIG_PPC32
void *pgdir; /* root of page-table tree */
#endif
/* Debug Registers */
struct debug_reg debug;
/* FP and VSX 0-31 register set */
double fpr[32][TS_FPRWIDTH] __attribute__((aligned(16)));
struct {
......
arch/powerpc/include/asm/reg_booke.h
View file @ 95791988
......@@ -381,7 +381,7 @@
#define DBCR0_IA34T 0x00004000 /* Instr Addr 3-4 range Toggle */
#define DBCR0_FT 0x00000001 /* Freeze Timers on debug event */
#define dbcr_iac_range(task) ((task)->thread.dbcr0)
#define dbcr_iac_range(task) ((task)->thread.debug.dbcr0)
#define DBCR_IAC12I DBCR0_IA12 /* Range Inclusive */
#define DBCR_IAC12X (DBCR0_IA12 | DBCR0_IA12X) /* Range Exclusive */
#define DBCR_IAC12MODE (DBCR0_IA12 | DBCR0_IA12X) /* IAC 1-2 Mode Bits */
......@@ -395,7 +395,7 @@
#define DBCR1_DAC1W 0x20000000 /* DAC1 Write Debug Event */
#define DBCR1_DAC2W 0x10000000 /* DAC2 Write Debug Event */
#define dbcr_dac(task) ((task)->thread.dbcr1)
#define dbcr_dac(task) ((task)->thread.debug.dbcr1)
#define DBCR_DAC1R DBCR1_DAC1R
#define DBCR_DAC1W DBCR1_DAC1W
#define DBCR_DAC2R DBCR1_DAC2R
......@@ -441,7 +441,7 @@
#define DBCR0_CRET 0x00000020 /* Critical Return Debug Event */
#define DBCR0_FT 0x00000001 /* Freeze Timers on debug event */
#define dbcr_dac(task) ((task)->thread.dbcr0)
#define dbcr_dac(task) ((task)->thread.debug.dbcr0)
#define DBCR_DAC1R DBCR0_DAC1R
#define DBCR_DAC1W DBCR0_DAC1W
#define DBCR_DAC2R DBCR0_DAC2R
......@@ -475,7 +475,7 @@
#define DBCR1_IAC34MX 0x000000C0 /* Instr Addr 3-4 range eXclusive */
#define DBCR1_IAC34AT 0x00000001 /* Instr Addr 3-4 range Toggle */
#define dbcr_iac_range(task) ((task)->thread.dbcr1)
#define dbcr_iac_range(task) ((task)->thread.debug.dbcr1)
#define DBCR_IAC12I DBCR1_IAC12M /* Range Inclusive */
#define DBCR_IAC12X DBCR1_IAC12MX /* Range Exclusive */
#define DBCR_IAC12MODE DBCR1_IAC12MX /* IAC 1-2 Mode Bits */
......
arch/powerpc/kernel/asm-offsets.c
View file @ 95791988
......@@ -113,7 +113,7 @@ int main(void)
#endif /* CONFIG_SPE */
#endif /* CONFIG_PPC64 */
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));
DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, debug.dbcr0));
#endif
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
DEFINE(THREAD_KVM_SVCPU, offsetof(struct thread_struct, kvm_shadow_vcpu));
......
arch/powerpc/kernel/process.c
View file @ 95791988
......@@ -314,28 +314,28 @@ static DEFINE_PER_CPU(struct arch_hw_breakpoint, current_brk);
*/
static void set_debug_reg_defaults(struct thread_struct *thread)
{
thread->iac1 = thread->iac2 = 0;
thread->debug.iac1 = thread->debug.iac2 = 0;
#if CONFIG_PPC_ADV_DEBUG_IACS > 2
thread->iac3 = thread->iac4 = 0;
thread->debug.iac3 = thread->debug.iac4 = 0;
#endif
thread->dac1 = thread->dac2 = 0;
thread->debug.dac1 = thread->debug.dac2 = 0;
#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
thread->dvc1 = thread->dvc2 = 0;
thread->debug.dvc1 = thread->debug.dvc2 = 0;
#endif
thread->dbcr0 = 0;
thread->debug.dbcr0 = 0;
#ifdef CONFIG_BOOKE
/*
* Force User/Supervisor bits to b11 (user-only MSR[PR]=1)
*/
thread->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US |
thread->debug.dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US |
DBCR1_IAC3US | DBCR1_IAC4US;
/*
* Force Data Address Compare User/Supervisor bits to be User-only
* (0b11 MSR[PR]=1) and set all other bits in DBCR2 register to be 0.
*/
thread->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
thread->debug.dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
#else
thread->dbcr1 = 0;
thread->debug.dbcr1 = 0;
#endif
}
......@@ -348,22 +348,22 @@ static void prime_debug_regs(struct thread_struct *thread)
*/
mtmsr(mfmsr() & ~MSR_DE);
mtspr(SPRN_IAC1, thread->iac1);
mtspr(SPRN_IAC2, thread->iac2);
mtspr(SPRN_IAC1, thread->debug.iac1);
mtspr(SPRN_IAC2, thread->debug.iac2);
#if CONFIG_PPC_ADV_DEBUG_IACS > 2
mtspr(SPRN_IAC3, thread->iac3);
mtspr(SPRN_IAC4, thread->iac4);
mtspr(SPRN_IAC3, thread->debug.iac3);
mtspr(SPRN_IAC4, thread->debug.iac4);
#endif
mtspr(SPRN_DAC1, thread->dac1);
mtspr(SPRN_DAC2, thread->dac2);
mtspr(SPRN_DAC1, thread->debug.dac1);
mtspr(SPRN_DAC2, thread->debug.dac2);
#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
mtspr(SPRN_DVC1, thread->dvc1);
mtspr(SPRN_DVC2, thread->dvc2);
mtspr(SPRN_DVC1, thread->debug.dvc1);
mtspr(SPRN_DVC2, thread->debug.dvc2);
#endif
mtspr(SPRN_DBCR0, thread->dbcr0);
mtspr(SPRN_DBCR1, thread->dbcr1);
mtspr(SPRN_DBCR0, thread->debug.dbcr0);
mtspr(SPRN_DBCR1, thread->debug.dbcr1);
#ifdef CONFIG_BOOKE
mtspr(SPRN_DBCR2, thread->dbcr2);
mtspr(SPRN_DBCR2, thread->debug.dbcr2);
#endif
}
/*
......@@ -373,8 +373,8 @@ static void prime_debug_regs(struct thread_struct *thread)
*/
static void switch_booke_debug_regs(struct thread_struct *new_thread)
{
if ((current->thread.dbcr0 & DBCR0_IDM)
|| (new_thread->dbcr0 & DBCR0_IDM))
if ((current->thread.debug.dbcr0 & DBCR0_IDM)
|| (new_thread->debug.dbcr0 & DBCR0_IDM))
prime_debug_regs(new_thread);
}
#else /* !CONFIG_PPC_ADV_DEBUG_REGS */
......
arch/powerpc/kernel/ptrace.c
View file @ 95791988
This diff is collapsed.
arch/powerpc/kernel/ptrace32.c
View file @ 95791988
......@@ -269,7 +269,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
if (addr > 0)
break;
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
ret = put_user(child->thread.dac1, (u32 __user *)data);
ret = put_user(child->thread.debug.dac1, (u32 __user *)data);
#else
dabr_fake = (
(child->thread.hw_brk.address & (~HW_BRK_TYPE_DABR)) |
......
arch/powerpc/kernel/signal_32.c
View file @ 95791988
......@@ -1309,7 +1309,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
unsigned char tmp;
unsigned long new_msr = regs->msr;
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
unsigned long new_dbcr0 = current->thread.dbcr0;
unsigned long new_dbcr0 = current->thread.debug.dbcr0;
#endif
for (i=0; i<ndbg; i++) {
......@@ -1324,7 +1324,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
} else {
new_dbcr0 &= ~DBCR0_IC;
if (!DBCR_ACTIVE_EVENTS(new_dbcr0,
current->thread.dbcr1)) {
current->thread.debug.dbcr1)) {
new_msr &= ~MSR_DE;
new_dbcr0 &= ~DBCR0_IDM;
}
......@@ -1359,7 +1359,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
the user is really doing something wrong. */
regs->msr = new_msr;
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
current->thread.dbcr0 = new_dbcr0;
current->thread.debug.dbcr0 = new_dbcr0;
#endif
if (!access_ok(VERIFY_READ, ctx, sizeof(*ctx))
......
arch/powerpc/kernel/traps.c
View file @ 95791988
......@@ -351,8 +351,8 @@ static inline int check_io_access(struct pt_regs *regs)
#define REASON_TRAP ESR_PTR
/* single-step stuff */
#define single_stepping(regs) (current->thread.dbcr0 & DBCR0_IC)
#define clear_single_step(regs) (current->thread.dbcr0 &= ~DBCR0_IC)
#define single_stepping(regs) (current->thread.debug.dbcr0 & DBCR0_IC)
#define clear_single_step(regs) (current->thread.debug.dbcr0 &= ~DBCR0_IC)
#else
/* On non-4xx, the reason for the machine check or program
......@@ -1486,7 +1486,7 @@ static void handle_debug(struct pt_regs *regs, unsigned long debug_status)
if (debug_status & (DBSR_DAC1R | DBSR_DAC1W)) {
dbcr_dac(current) &= ~(DBCR_DAC1R | DBCR_DAC1W);
#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
current->thread.dbcr2 &= ~DBCR2_DAC12MODE;
current->thread.debug.dbcr2 &= ~DBCR2_DAC12MODE;
#endif
do_send_trap(regs, mfspr(SPRN_DAC1), debug_status, TRAP_HWBKPT,
5);
......@@ -1497,24 +1497,24 @@ static void handle_debug(struct pt_regs *regs, unsigned long debug_status)
6);
changed |= 0x01;
} else if (debug_status & DBSR_IAC1) {
current->thread.dbcr0 &= ~DBCR0_IAC1;
current->thread.debug.dbcr0 &= ~DBCR0_IAC1;
dbcr_iac_range(current) &= ~DBCR_IAC12MODE;
do_send_trap(regs, mfspr(SPRN_IAC1), debug_status, TRAP_HWBKPT,
1);
changed |= 0x01;
} else if (debug_status & DBSR_IAC2) {
current->thread.dbcr0 &= ~DBCR0_IAC2;
current->thread.debug.dbcr0 &= ~DBCR0_IAC2;
do_send_trap(regs, mfspr(SPRN_IAC2), debug_status, TRAP_HWBKPT,
2);
changed |= 0x01;
} else if (debug_status & DBSR_IAC3) {
current->thread.dbcr0 &= ~DBCR0_IAC3;
current->thread.debug.dbcr0 &= ~DBCR0_IAC3;
dbcr_iac_range(current) &= ~DBCR_IAC34MODE;
do_send_trap(regs, mfspr(SPRN_IAC3), debug_status, TRAP_HWBKPT,
3);
changed |= 0x01;
} else if (debug_status & DBSR_IAC4) {
current->thread.dbcr0 &= ~DBCR0_IAC4;
current->thread.debug.dbcr0 &= ~DBCR0_IAC4;
do_send_trap(regs, mfspr(SPRN_IAC4), debug_status, TRAP_HWBKPT,
4);
changed |= 0x01;
......@@ -1524,19 +1524,20 @@ static void handle_debug(struct pt_regs *regs, unsigned long debug_status)
* Check all other debug flags and see if that bit needs to be turned
* back on or not.
*/
if (DBCR_ACTIVE_EVENTS(current->thread.dbcr0, current->thread.dbcr1))
if (DBCR_ACTIVE_EVENTS(current->thread.debug.dbcr0,
current->thread.debug.dbcr1))
regs->msr |= MSR_DE;
else
/* Make sure the IDM flag is off */
current->thread.dbcr0 &= ~DBCR0_IDM;
current->thread.debug.dbcr0 &= ~DBCR0_IDM;
if (changed & 0x01)
mtspr(SPRN_DBCR0, current->thread.dbcr0);
mtspr(SPRN_DBCR0, current->thread.debug.dbcr0);
}
void __kprobes DebugException(struct pt_regs *regs, unsigned long debug_status)
{
current->thread.dbsr = debug_status;
current->thread.debug.dbsr = debug_status;
/* Hack alert: On BookE, Branch Taken stops on the branch itself, while
* on server, it stops on the target of the branch. In order to simulate
......@@ -1553,8 +1554,8 @@ void __kprobes DebugException(struct pt_regs *regs, unsigned long debug_status)
/* Do the single step trick only when coming from userspace */
if (user_mode(regs)) {
current->thread.dbcr0 &= ~DBCR0_BT;
current->thread.dbcr0 |= DBCR0_IDM | DBCR0_IC;
current->thread.debug.dbcr0 &= ~DBCR0_BT;
current->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC;
regs->msr |= MSR_DE;
return;
}
......@@ -1582,13 +1583,13 @@ void __kprobes DebugException(struct pt_regs *regs, unsigned long debug_status)
return;
if (user_mode(regs)) {
current->thread.dbcr0 &= ~DBCR0_IC;
if (DBCR_ACTIVE_EVENTS(current->thread.dbcr0,
current->thread.dbcr1))
current->thread.debug.dbcr0 &= ~DBCR0_IC;
if (DBCR_ACTIVE_EVENTS(current->thread.debug.dbcr0,
current->thread.debug.dbcr1))
regs->msr |= MSR_DE;
else
/* Make sure the IDM bit is off */
current->thread.dbcr0 &= ~DBCR0_IDM;
current->thread.debug.dbcr0 &= ~DBCR0_IDM;
}
_exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
......
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