Commit e4da01d8 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'powerpc-5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull more powerpc updates from Michael Ellerman:
 "The bulk of this is the series to make CONFIG_COMPAT user-selectable,
  it's been around for a long time but was blocked behind the
  syscall-in-C series.

  Plus there's also a few fixes and other minor things.

  Summary:

   - A fix for a crash in machine check handling on pseries (ie. guests)

   - A small series to make it possible to disable CONFIG_COMPAT, and
     turn it off by default for ppc64le where it's not used.

   - A few other miscellaneous fixes and small improvements.

  Thanks to: Alexey Kardashevskiy, Anju T Sudhakar, Arnd Bergmann,
  Christophe Leroy, Dan Carpenter, Ganesh Goudar, Geert Uytterhoeven,
  Geoff Levand, Mahesh Salgaonkar, Markus Elfring, Michal Suchanek,
  Nicholas Piggin, Stephen Boyd, Wen Xiong"

* tag 'powerpc-5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  selftests/powerpc: Always build the tm-poison test 64-bit
  powerpc: Improve ppc_save_regs()
  Revert "powerpc/64: irq_work avoid interrupt when called with hardware irqs enabled"
  powerpc/time: Replace <linux/clk-provider.h> by <linux/of_clk.h>
  powerpc/pseries/ddw: Extend upper limit for huge DMA window for persistent memory
  powerpc/perf: split callchain.c by bitness
  powerpc/64: Make COMPAT user-selectable disabled on littleendian by default.
  powerpc/64: make buildable without CONFIG_COMPAT
  powerpc/perf: consolidate valid_user_sp -> invalid_user_sp
  powerpc/perf: consolidate read_user_stack_32
  powerpc: move common register copy functions from signal_32.c to signal.c
  powerpc: Add back __ARCH_WANT_SYS_LLSEEK macro
  powerpc/ps3: Set CONFIG_UEVENT_HELPER=y in ps3_defconfig
  powerpc/ps3: Remove an unneeded NULL check
  powerpc/ps3: Remove duplicate error message
  powerpc/powernv: Re-enable imc trace-mode in kernel
  powerpc/perf: Implement a global lock to avoid races between trace, core and thread imc events.
  powerpc/pseries: Fix MCE handling on pseries
  selftests/eeh: Skip ahci adapters
  powerpc/64s: Fix doorbell wakeup msgclr optimisation
parents 6cff4821 6ba4a2d3
......@@ -266,8 +266,9 @@ config PANIC_TIMEOUT
default 180
config COMPAT
bool
default y if PPC64
bool "Enable support for 32bit binaries"
depends on PPC64
default y if !CPU_LITTLE_ENDIAN
select COMPAT_BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC
select COMPAT_OLD_SIGACTION
......
......@@ -60,6 +60,8 @@ CONFIG_CFG80211=m
CONFIG_CFG80211_WEXT=y
CONFIG_MAC80211=m
# CONFIG_MAC80211_RC_MINSTREL is not set
CONFIG_UEVENT_HELPER=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=65535
......
......@@ -162,10 +162,10 @@ static inline bool test_thread_local_flags(unsigned int flags)
return (ti->local_flags & flags) != 0;
}
#ifdef CONFIG_PPC64
#ifdef CONFIG_COMPAT
#define is_32bit_task() (test_thread_flag(TIF_32BIT))
#else
#define is_32bit_task() (1)
#define is_32bit_task() (IS_ENABLED(CONFIG_PPC32))
#endif
#if defined(CONFIG_PPC64)
......
......@@ -31,6 +31,7 @@
#define __ARCH_WANT_SYS_SOCKETCALL
#define __ARCH_WANT_SYS_FADVISE64
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLD_UNAME
......
......@@ -40,16 +40,17 @@ CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
endif
obj-y := cputable.o syscalls.o \
irq.o align.o signal_32.o pmc.o vdso.o \
irq.o align.o signal_$(BITS).o pmc.o vdso.o \
process.o systbl.o idle.o \
signal.o sysfs.o cacheinfo.o time.o \
prom.o traps.o setup-common.o \
udbg.o misc.o io.o misc_$(BITS).o \
of_platform.o prom_parse.o
obj-y += ptrace/
obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o signal_64.o \
obj-$(CONFIG_PPC64) += setup_64.o \
paca.o nvram_64.o firmware.o note.o \
syscall_64.o
obj-$(CONFIG_COMPAT) += sys_ppc32.o signal_32.o
obj-$(CONFIG_VDSO32) += vdso32/
obj-$(CONFIG_PPC_WATCHDOG) += watchdog.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
......
......@@ -52,8 +52,10 @@
SYS_CALL_TABLE:
.tc sys_call_table[TC],sys_call_table
#ifdef CONFIG_COMPAT
COMPAT_SYS_CALL_TABLE:
.tc compat_sys_call_table[TC],compat_sys_call_table
#endif
/* This value is used to mark exception frames on the stack. */
exception_marker:
......
......@@ -3121,22 +3121,3 @@ handle_dabr_fault:
li r5,SIGSEGV
bl bad_page_fault
b interrupt_return
/*
* When doorbell is triggered from system reset wakeup, the message is
* not cleared, so it would fire again when EE is enabled.
*
* When coming from local_irq_enable, there may be the same problem if
* we were hard disabled.
*
* Execute msgclr to clear pending exceptions before handling it.
*/
h_doorbell_common_msgclr:
LOAD_REG_IMMEDIATE(r3, PPC_DBELL_MSGTYPE << (63-36))
PPC_MSGCLR(3)
b h_doorbell_common_virt
doorbell_super_common_msgclr:
LOAD_REG_IMMEDIATE(r3, PPC_DBELL_MSGTYPE << (63-36))
PPC_MSGCLRP(3)
b doorbell_super_common_virt
......@@ -527,6 +527,19 @@ void irq_set_pending_from_srr1(unsigned long srr1)
return;
}
if (reason == PACA_IRQ_DBELL) {
/*
* When doorbell triggers a system reset wakeup, the message
* is not cleared, so if the doorbell interrupt is replayed
* and the IPI handled, the doorbell interrupt would still
* fire when EE is enabled.
*
* To avoid taking the superfluous doorbell interrupt,
* execute a msgclr here before the interrupt is replayed.
*/
ppc_msgclr(PPC_DBELL_MSGTYPE);
}
/*
* The 0 index (SRR1[42:45]=b0000) must always evaluate to 0,
* so this can be called unconditionally with the SRR1 wake
......
......@@ -55,14 +55,17 @@ _GLOBAL(ppc_save_regs)
PPC_STL r29,29*SZL(r3)
PPC_STL r30,30*SZL(r3)
PPC_STL r31,31*SZL(r3)
lbz r0,PACAIRQSOFTMASK(r13)
PPC_STL r0,SOFTE-STACK_FRAME_OVERHEAD(r3)
#endif
/* go up one stack frame for SP */
PPC_LL r4,0(r1)
PPC_STL r4,1*SZL(r3)
/* get caller's LR */
PPC_LL r0,LRSAVE(r4)
PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3)
mflr r0
PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
mfmsr r0
PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3)
mfctr r0
......@@ -73,4 +76,5 @@ _GLOBAL(ppc_save_regs)
PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3)
li r0,0
PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
PPC_STL r0,ORIG_GPR3-STACK_FRAME_OVERHEAD(r3)
blr
......@@ -6,7 +6,7 @@
CFLAGS_ptrace-view.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
obj-y += ptrace.o ptrace-view.o
obj-$(CONFIG_PPC64) += ptrace32.o
obj-$(CONFIG_COMPAT) += ptrace32.o
obj-$(CONFIG_VSX) += ptrace-vsx.o
ifneq ($(CONFIG_VSX),y)
obj-y += ptrace-novsx.o
......
......@@ -18,12 +18,153 @@
#include <linux/syscalls.h>
#include <asm/hw_breakpoint.h>
#include <linux/uaccess.h>
#include <asm/switch_to.h>
#include <asm/unistd.h>
#include <asm/debug.h>
#include <asm/tm.h>
#include "signal.h"
#ifdef CONFIG_VSX
unsigned long copy_fpr_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NFPREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
buf[i] = task->thread.TS_FPR(i);
buf[i] = task->thread.fp_state.fpscr;
return __copy_to_user(to, buf, ELF_NFPREG * sizeof(double));
}
unsigned long copy_fpr_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NFPREG];
int i;
if (__copy_from_user(buf, from, ELF_NFPREG * sizeof(double)))
return 1;
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
task->thread.TS_FPR(i) = buf[i];
task->thread.fp_state.fpscr = buf[i];
return 0;
}
unsigned long copy_vsx_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NVSRHALFREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < ELF_NVSRHALFREG; i++)
buf[i] = task->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
return __copy_to_user(to, buf, ELF_NVSRHALFREG * sizeof(double));
}
unsigned long copy_vsx_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NVSRHALFREG];
int i;
if (__copy_from_user(buf, from, ELF_NVSRHALFREG * sizeof(double)))
return 1;
for (i = 0; i < ELF_NVSRHALFREG ; i++)
task->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return 0;
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
unsigned long copy_ckfpr_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NFPREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
buf[i] = task->thread.TS_CKFPR(i);
buf[i] = task->thread.ckfp_state.fpscr;
return __copy_to_user(to, buf, ELF_NFPREG * sizeof(double));
}
unsigned long copy_ckfpr_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NFPREG];
int i;
if (__copy_from_user(buf, from, ELF_NFPREG * sizeof(double)))
return 1;
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
task->thread.TS_CKFPR(i) = buf[i];
task->thread.ckfp_state.fpscr = buf[i];
return 0;
}
unsigned long copy_ckvsx_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NVSRHALFREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < ELF_NVSRHALFREG; i++)
buf[i] = task->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
return __copy_to_user(to, buf, ELF_NVSRHALFREG * sizeof(double));
}
unsigned long copy_ckvsx_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NVSRHALFREG];
int i;
if (__copy_from_user(buf, from, ELF_NVSRHALFREG * sizeof(double)))
return 1;
for (i = 0; i < ELF_NVSRHALFREG ; i++)
task->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return 0;
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#else
inline unsigned long copy_fpr_to_user(void __user *to,
struct task_struct *task)
{
return __copy_to_user(to, task->thread.fp_state.fpr,
ELF_NFPREG * sizeof(double));
}
inline unsigned long copy_fpr_from_user(struct task_struct *task,
void __user *from)
{
return __copy_from_user(task->thread.fp_state.fpr, from,
ELF_NFPREG * sizeof(double));
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
inline unsigned long copy_ckfpr_to_user(void __user *to,
struct task_struct *task)
{
return __copy_to_user(to, task->thread.ckfp_state.fpr,
ELF_NFPREG * sizeof(double));
}
inline unsigned long copy_ckfpr_from_user(struct task_struct *task,
void __user *from)
{
return __copy_from_user(task->thread.ckfp_state.fpr, from,
ELF_NFPREG * sizeof(double));
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#endif
/* Log an error when sending an unhandled signal to a process. Controlled
* through debug.exception-trace sysctl.
*/
......@@ -106,7 +247,6 @@ static void do_signal(struct task_struct *tsk)
sigset_t *oldset = sigmask_to_save();
struct ksignal ksig = { .sig = 0 };
int ret;
int is32 = is_32bit_task();
BUG_ON(tsk != current);
......@@ -136,7 +276,7 @@ static void do_signal(struct task_struct *tsk)
rseq_signal_deliver(&ksig, tsk->thread.regs);
if (is32) {
if (is_32bit_task()) {
if (ksig.ka.sa.sa_flags & SA_SIGINFO)
ret = handle_rt_signal32(&ksig, oldset, tsk);
else
......
......@@ -235,146 +235,6 @@ struct rt_sigframe {
int abigap[56];
};
#ifdef CONFIG_VSX
unsigned long copy_fpr_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NFPREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
buf[i] = task->thread.TS_FPR(i);
buf[i] = task->thread.fp_state.fpscr;
return __copy_to_user(to, buf, ELF_NFPREG * sizeof(double));
}
unsigned long copy_fpr_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NFPREG];
int i;
if (__copy_from_user(buf, from, ELF_NFPREG * sizeof(double)))
return 1;
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
task->thread.TS_FPR(i) = buf[i];
task->thread.fp_state.fpscr = buf[i];
return 0;
}
unsigned long copy_vsx_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NVSRHALFREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < ELF_NVSRHALFREG; i++)
buf[i] = task->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
return __copy_to_user(to, buf, ELF_NVSRHALFREG * sizeof(double));
}
unsigned long copy_vsx_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NVSRHALFREG];
int i;
if (__copy_from_user(buf, from, ELF_NVSRHALFREG * sizeof(double)))
return 1;
for (i = 0; i < ELF_NVSRHALFREG ; i++)
task->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return 0;
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
unsigned long copy_ckfpr_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NFPREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
buf[i] = task->thread.TS_CKFPR(i);
buf[i] = task->thread.ckfp_state.fpscr;
return __copy_to_user(to, buf, ELF_NFPREG * sizeof(double));
}
unsigned long copy_ckfpr_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NFPREG];
int i;
if (__copy_from_user(buf, from, ELF_NFPREG * sizeof(double)))
return 1;
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
task->thread.TS_CKFPR(i) = buf[i];
task->thread.ckfp_state.fpscr = buf[i];
return 0;
}
unsigned long copy_ckvsx_to_user(void __user *to,
struct task_struct *task)
{
u64 buf[ELF_NVSRHALFREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < ELF_NVSRHALFREG; i++)
buf[i] = task->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
return __copy_to_user(to, buf, ELF_NVSRHALFREG * sizeof(double));
}
unsigned long copy_ckvsx_from_user(struct task_struct *task,
void __user *from)
{
u64 buf[ELF_NVSRHALFREG];
int i;
if (__copy_from_user(buf, from, ELF_NVSRHALFREG * sizeof(double)))
return 1;
for (i = 0; i < ELF_NVSRHALFREG ; i++)
task->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return 0;
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#else
inline unsigned long copy_fpr_to_user(void __user *to,
struct task_struct *task)
{
return __copy_to_user(to, task->thread.fp_state.fpr,
ELF_NFPREG * sizeof(double));
}
inline unsigned long copy_fpr_from_user(struct task_struct *task,
void __user *from)
{
return __copy_from_user(task->thread.fp_state.fpr, from,
ELF_NFPREG * sizeof(double));
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
inline unsigned long copy_ckfpr_to_user(void __user *to,
struct task_struct *task)
{
return __copy_to_user(to, task->thread.ckfp_state.fpr,
ELF_NFPREG * sizeof(double));
}
inline unsigned long copy_ckfpr_from_user(struct task_struct *task,
void __user *from)
{
return __copy_from_user(task->thread.ckfp_state.fpr, from,
ELF_NFPREG * sizeof(double));
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#endif
/*
* Save the current user registers on the user stack.
* We only save the altivec/spe registers if the process has used
......
......@@ -22,7 +22,6 @@ notrace long system_call_exception(long r3, long r4, long r5,
long r6, long r7, long r8,
unsigned long r0, struct pt_regs *regs)
{
unsigned long ti_flags;
syscall_fn f;
if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
......@@ -60,8 +59,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
local_irq_enable();
ti_flags = current_thread_info()->flags;
if (unlikely(ti_flags & _TIF_SYSCALL_DOTRACE)) {
if (unlikely(current_thread_info()->flags & _TIF_SYSCALL_DOTRACE)) {
/*
* We use the return value of do_syscall_trace_enter() as the
* syscall number. If the syscall was rejected for any reason
......@@ -86,7 +84,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
/* May be faster to do array_index_nospec? */
barrier_nospec();
if (unlikely(ti_flags & _TIF_32BIT)) {
if (unlikely(is_32bit_task())) {
f = (void *)compat_sys_call_table[r0];
r3 &= 0x00000000ffffffffULL;
......
......@@ -50,7 +50,7 @@
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/irq_work.h>
#include <linux/clk-provider.h>
#include <linux/of_clk.h>
#include <linux/suspend.h>
#include <linux/sched/cputime.h>
#include <linux/processor.h>
......@@ -522,35 +522,6 @@ static inline void clear_irq_work_pending(void)
"i" (offsetof(struct paca_struct, irq_work_pending)));
}
void arch_irq_work_raise(void)
{
preempt_disable();
set_irq_work_pending_flag();
/*
* Non-nmi code running with interrupts disabled will replay
* irq_happened before it re-enables interrupts, so setthe
* decrementer there instead of causing a hardware exception
* which would immediately hit the masked interrupt handler
* and have the net effect of setting the decrementer in
* irq_happened.
*
* NMI interrupts can not check this when they return, so the
* decrementer hardware exception is raised, which will fire
* when interrupts are next enabled.
*
* BookE does not support this yet, it must audit all NMI
* interrupt handlers to ensure they call nmi_enter() so this
* check would be correct.
*/
if (IS_ENABLED(CONFIG_BOOKE) || !irqs_disabled() || in_nmi()) {
set_dec(1);
} else {
hard_irq_disable();
local_paca->irq_happened |= PACA_IRQ_DEC;
}
preempt_enable();
}
#else /* 32-bit */
DEFINE_PER_CPU(u8, irq_work_pending);
......@@ -559,16 +530,27 @@ DEFINE_PER_CPU(u8, irq_work_pending);
#define test_irq_work_pending() __this_cpu_read(irq_work_pending)
#define clear_irq_work_pending() __this_cpu_write(irq_work_pending, 0)
#endif /* 32 vs 64 bit */
void arch_irq_work_raise(void)
{
/*
* 64-bit code that uses irq soft-mask can just cause an immediate
* interrupt here that gets soft masked, if this is called under
* local_irq_disable(). It might be possible to prevent that happening
* by noticing interrupts are disabled and setting decrementer pending
* to be replayed when irqs are enabled. The problem there is that
* tracing can call irq_work_raise, including in code that does low
* level manipulations of irq soft-mask state (e.g., trace_hardirqs_on)
* which could get tangled up if we're messing with the same state
* here.
*/
preempt_disable();
set_irq_work_pending_flag();
set_dec(1);
preempt_enable();
}
#endif /* 32 vs 64 bit */
#else /* CONFIG_IRQ_WORK */
#define test_irq_work_pending() 0
......@@ -1149,9 +1131,7 @@ void __init time_init(void)
init_decrementer_clockevent();
tick_setup_hrtimer_broadcast();
#ifdef CONFIG_COMMON_CLK
of_clk_init(NULL);
#endif
}
/*
......
......@@ -651,7 +651,8 @@ static void __init vdso_setup_syscall_map(void)
if (sys_call_table[i] != sys_ni_syscall)
vdso_data->syscall_map_64[i >> 5] |=
0x80000000UL >> (i & 0x1f);
if (compat_sys_call_table[i] != sys_ni_syscall)
if (IS_ENABLED(CONFIG_COMPAT) &&
compat_sys_call_table[i] != sys_ni_syscall)
vdso_data->syscall_map_32[i >> 5] |=
0x80000000UL >> (i & 0x1f);
#else /* CONFIG_PPC64 */
......
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PERF_EVENTS) += callchain.o perf_regs.o
obj-$(CONFIG_PERF_EVENTS) += callchain.o callchain_$(BITS).o perf_regs.o
ifdef CONFIG_COMPAT
obj-$(CONFIG_PERF_EVENTS) += callchain_32.o
endif
obj-$(CONFIG_PPC_PERF_CTRS) += core-book3s.o bhrb.o
obj64-$(CONFIG_PPC_PERF_CTRS) += ppc970-pmu.o power5-pmu.o \
......
......@@ -15,11 +15,9 @@
#include <asm/sigcontext.h>
#include <asm/ucontext.h>
#include <asm/vdso.h>
#ifdef CONFIG_PPC64
#include "../kernel/ppc32.h"
#endif
#include <asm/pte-walk.h>
#include "callchain.h"
/*
* Is sp valid as the address of the next kernel stack frame after prev_sp?
......@@ -102,358 +100,6 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re
}
}
#ifdef CONFIG_PPC64
/*
* On 64-bit we don't want to invoke hash_page on user addresses from
* interrupt context, so if the access faults, we read the page tables
* to find which page (if any) is mapped and access it directly.
*/
static int read_user_stack_slow(void __user *ptr, void *buf, int nb)
{
int ret = -EFAULT;
pgd_t *pgdir;
pte_t *ptep, pte;
unsigned shift;
unsigned long addr = (unsigned long) ptr;
unsigned long offset;
unsigned long pfn, flags;
void *kaddr;
pgdir = current->mm->pgd;
if (!pgdir)
return -EFAULT;
local_irq_save(flags);
ptep = find_current_mm_pte(pgdir, addr, NULL, &shift);
if (!ptep)
goto err_out;
if (!shift)
shift = PAGE_SHIFT;
/* align address to page boundary */
offset = addr & ((1UL << shift) - 1);
pte = READ_ONCE(*ptep);
if (!pte_present(pte) || !pte_user(pte))
goto err_out;
pfn = pte_pfn(pte);
if (!page_is_ram(pfn))
goto err_out;
/* no highmem to worry about here */
kaddr = pfn_to_kaddr(pfn);
memcpy(buf, kaddr + offset, nb);
ret = 0;
err_out:
local_irq_restore(flags);
return ret;
}
static int read_user_stack_64(unsigned long __user *ptr, unsigned long *ret)
{
if ((unsigned long)ptr > TASK_SIZE - sizeof(unsigned long) ||
((unsigned long)ptr & 7))
return -EFAULT;
if (!probe_user_read(ret, ptr, sizeof(*ret)))