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-rw-r--r--arch/powerpc/kernel/Makefile6
-rw-r--r--arch/powerpc/kernel/head_32.h6
-rw-r--r--arch/powerpc/kernel/head_8xx.S13
-rw-r--r--arch/powerpc/kernel/interrupt.c15
-rw-r--r--arch/powerpc/kernel/module_64.c42
-rw-r--r--arch/powerpc/kernel/ptrace/ptrace.c3
-rw-r--r--arch/powerpc/kernel/signal.h10
-rw-r--r--arch/powerpc/kernel/signal_32.c2
-rw-r--r--arch/powerpc/kernel/signal_64.c4
-rw-r--r--arch/powerpc/kernel/syscalls/syscall.tbl1
-rw-r--r--arch/powerpc/kernel/watchdog.c6
11 files changed, 74 insertions, 34 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 0e3640e14eb1..b039877c743d 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -47,7 +47,7 @@ obj-y := cputable.o syscalls.o \
udbg.o misc.o io.o misc_$(BITS).o \
of_platform.o prom_parse.o firmware.o \
hw_breakpoint_constraints.o interrupt.o \
- kdebugfs.o
+ kdebugfs.o stacktrace.o
obj-y += ptrace/
obj-$(CONFIG_PPC64) += setup_64.o \
paca.o nvram_64.o note.o
@@ -116,7 +116,6 @@ obj-$(CONFIG_OPTPROBES) += optprobes.o optprobes_head.o
obj-$(CONFIG_KPROBES_ON_FTRACE) += kprobes-ftrace.o
obj-$(CONFIG_UPROBES) += uprobes.o
obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o
-obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o
obj-$(CONFIG_ARCH_HAS_DMA_SET_MASK) += dma-mask.o
@@ -196,3 +195,6 @@ clean-files := vmlinux.lds
# Force dependency (incbin is bad)
$(obj)/vdso32_wrapper.o : $(obj)/vdso32/vdso32.so.dbg
$(obj)/vdso64_wrapper.o : $(obj)/vdso64/vdso64.so.dbg
+
+# for cleaning
+subdir- += vdso32 vdso64
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
index 6b1ec9e3541b..349c4a820231 100644
--- a/arch/powerpc/kernel/head_32.h
+++ b/arch/powerpc/kernel/head_32.h
@@ -202,11 +202,11 @@ vmap_stack_overflow:
mfspr r1, SPRN_SPRG_THREAD
lwz r1, TASK_CPU - THREAD(r1)
slwi r1, r1, 3
- addis r1, r1, emergency_ctx@ha
+ addis r1, r1, emergency_ctx-PAGE_OFFSET@ha
#else
- lis r1, emergency_ctx@ha
+ lis r1, emergency_ctx-PAGE_OFFSET@ha
#endif
- lwz r1, emergency_ctx@l(r1)
+ lwz r1, emergency_ctx-PAGE_OFFSET@l(r1)
addi r1, r1, THREAD_SIZE - INT_FRAME_SIZE
EXCEPTION_PROLOG_2 0 vmap_stack_overflow
prepare_transfer_to_handler
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 2d596881b70e..0d073b9fd52c 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -733,6 +733,7 @@ _GLOBAL(mmu_pin_tlb)
#ifdef CONFIG_PIN_TLB_DATA
LOAD_REG_IMMEDIATE(r6, PAGE_OFFSET)
LOAD_REG_IMMEDIATE(r7, MI_SVALID | MI_PS8MEG | _PMD_ACCESSED)
+ li r8, 0
#ifdef CONFIG_PIN_TLB_IMMR
li r0, 3
#else
@@ -741,26 +742,26 @@ _GLOBAL(mmu_pin_tlb)
mtctr r0
cmpwi r4, 0
beq 4f
- LOAD_REG_IMMEDIATE(r8, 0xf0 | _PAGE_RO | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT)
LOAD_REG_ADDR(r9, _sinittext)
2: ori r0, r6, MD_EVALID
+ ori r12, r8, 0xf0 | _PAGE_RO | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT
mtspr SPRN_MD_CTR, r5
mtspr SPRN_MD_EPN, r0
mtspr SPRN_MD_TWC, r7
- mtspr SPRN_MD_RPN, r8
+ mtspr SPRN_MD_RPN, r12
addi r5, r5, 0x100
addis r6, r6, SZ_8M@h
addis r8, r8, SZ_8M@h
cmplw r6, r9
bdnzt lt, 2b
-
-4: LOAD_REG_IMMEDIATE(r8, 0xf0 | _PAGE_DIRTY | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT)
+4:
2: ori r0, r6, MD_EVALID
+ ori r12, r8, 0xf0 | _PAGE_DIRTY | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT
mtspr SPRN_MD_CTR, r5
mtspr SPRN_MD_EPN, r0
mtspr SPRN_MD_TWC, r7
- mtspr SPRN_MD_RPN, r8
+ mtspr SPRN_MD_RPN, r12
addi r5, r5, 0x100
addis r6, r6, SZ_8M@h
addis r8, r8, SZ_8M@h
@@ -781,7 +782,7 @@ _GLOBAL(mmu_pin_tlb)
#endif
#if defined(CONFIG_PIN_TLB_IMMR) || defined(CONFIG_PIN_TLB_DATA)
lis r0, (MD_RSV4I | MD_TWAM)@h
- mtspr SPRN_MI_CTR, r0
+ mtspr SPRN_MD_CTR, r0
#endif
mtspr SPRN_SRR1, r10
mtspr SPRN_SRR0, r11
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index 835b626cd476..563ebfcd16e2 100644
--- a/arch/powerpc/kernel/interrupt.c
+++ b/arch/powerpc/kernel/interrupt.c
@@ -148,7 +148,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
*/
if (IS_ENABLED(CONFIG_PPC_TRANSACTIONAL_MEM) &&
unlikely(MSR_TM_TRANSACTIONAL(regs->msr)))
- current_thread_info()->flags |= _TIF_RESTOREALL;
+ set_bits(_TIF_RESTOREALL, &current_thread_info()->flags);
/*
* If the system call was made with a transaction active, doom it and
@@ -181,7 +181,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
local_irq_enable();
- if (unlikely(current_thread_info()->flags & _TIF_SYSCALL_DOTRACE)) {
+ if (unlikely(read_thread_flags() & _TIF_SYSCALL_DOTRACE)) {
if (unlikely(trap_is_unsupported_scv(regs))) {
/* Unsupported scv vector */
_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
@@ -343,7 +343,7 @@ interrupt_exit_user_prepare_main(unsigned long ret, struct pt_regs *regs)
unsigned long ti_flags;
again:
- ti_flags = READ_ONCE(current_thread_info()->flags);
+ ti_flags = read_thread_flags();
while (unlikely(ti_flags & (_TIF_USER_WORK_MASK & ~_TIF_RESTORE_TM))) {
local_irq_enable();
if (ti_flags & _TIF_NEED_RESCHED) {
@@ -359,7 +359,7 @@ again:
do_notify_resume(regs, ti_flags);
}
local_irq_disable();
- ti_flags = READ_ONCE(current_thread_info()->flags);
+ ti_flags = read_thread_flags();
}
if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && IS_ENABLED(CONFIG_PPC_FPU)) {
@@ -437,7 +437,7 @@ notrace unsigned long syscall_exit_prepare(unsigned long r3,
/* Check whether the syscall is issued inside a restartable sequence */
rseq_syscall(regs);
- ti_flags = current_thread_info()->flags;
+ ti_flags = read_thread_flags();
if (unlikely(r3 >= (unsigned long)-MAX_ERRNO) && is_not_scv) {
if (likely(!(ti_flags & (_TIF_NOERROR | _TIF_RESTOREALL)))) {
@@ -532,8 +532,7 @@ notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs)
unsigned long flags;
unsigned long ret = 0;
unsigned long kuap;
- bool stack_store = current_thread_info()->flags &
- _TIF_EMULATE_STACK_STORE;
+ bool stack_store = read_thread_flags() & _TIF_EMULATE_STACK_STORE;
if (regs_is_unrecoverable(regs))
unrecoverable_exception(regs);
@@ -554,7 +553,7 @@ notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs)
again:
if (IS_ENABLED(CONFIG_PREEMPT)) {
/* Return to preemptible kernel context */
- if (unlikely(current_thread_info()->flags & _TIF_NEED_RESCHED)) {
+ if (unlikely(read_thread_flags() & _TIF_NEED_RESCHED)) {
if (preempt_count() == 0)
preempt_schedule_irq();
}
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 6baa676e7cb6..5d77d3f5fbb5 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -422,11 +422,17 @@ static inline int create_stub(const Elf64_Shdr *sechdrs,
const char *name)
{
long reladdr;
+ func_desc_t desc;
+ int i;
if (is_mprofile_ftrace_call(name))
return create_ftrace_stub(entry, addr, me);
- memcpy(entry->jump, ppc64_stub_insns, sizeof(ppc64_stub_insns));
+ for (i = 0; i < sizeof(ppc64_stub_insns) / sizeof(u32); i++) {
+ if (patch_instruction(&entry->jump[i],
+ ppc_inst(ppc64_stub_insns[i])))
+ return 0;
+ }
/* Stub uses address relative to r2. */
reladdr = (unsigned long)entry - my_r2(sechdrs, me);
@@ -437,10 +443,24 @@ static inline int create_stub(const Elf64_Shdr *sechdrs,
}
pr_debug("Stub %p get data from reladdr %li\n", entry, reladdr);
- entry->jump[0] |= PPC_HA(reladdr);
- entry->jump[1] |= PPC_LO(reladdr);
- entry->funcdata = func_desc(addr);
- entry->magic = STUB_MAGIC;
+ if (patch_instruction(&entry->jump[0],
+ ppc_inst(entry->jump[0] | PPC_HA(reladdr))))
+ return 0;
+
+ if (patch_instruction(&entry->jump[1],
+ ppc_inst(entry->jump[1] | PPC_LO(reladdr))))
+ return 0;
+
+ // func_desc_t is 8 bytes if ABIv2, else 16 bytes
+ desc = func_desc(addr);
+ for (i = 0; i < sizeof(func_desc_t) / sizeof(u32); i++) {
+ if (patch_instruction(((u32 *)&entry->funcdata) + i,
+ ppc_inst(((u32 *)(&desc))[i])))
+ return 0;
+ }
+
+ if (patch_instruction(&entry->magic, ppc_inst(STUB_MAGIC)))
+ return 0;
return 1;
}
@@ -495,8 +515,11 @@ static int restore_r2(const char *name, u32 *instruction, struct module *me)
me->name, *instruction, instruction);
return 0;
}
+
/* ld r2,R2_STACK_OFFSET(r1) */
- *instruction = PPC_INST_LD_TOC;
+ if (patch_instruction(instruction, ppc_inst(PPC_INST_LD_TOC)))
+ return 0;
+
return 1;
}
@@ -636,9 +659,12 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
}
/* Only replace bits 2 through 26 */
- *(uint32_t *)location
- = (*(uint32_t *)location & ~0x03fffffc)
+ value = (*(uint32_t *)location & ~0x03fffffc)
| (value & 0x03fffffc);
+
+ if (patch_instruction((u32 *)location, ppc_inst(value)))
+ return -EFAULT;
+
break;
case R_PPC64_REL64:
diff --git a/arch/powerpc/kernel/ptrace/ptrace.c b/arch/powerpc/kernel/ptrace/ptrace.c
index 7c7093c17c45..c43f77e2ac31 100644
--- a/arch/powerpc/kernel/ptrace/ptrace.c
+++ b/arch/powerpc/kernel/ptrace/ptrace.c
@@ -260,8 +260,7 @@ long do_syscall_trace_enter(struct pt_regs *regs)
{
u32 flags;
- flags = READ_ONCE(current_thread_info()->flags) &
- (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE);
+ flags = read_thread_flags() & (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE);
if (flags) {
int rc = tracehook_report_syscall_entry(regs);
diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index 1f07317964e4..618aeccdf691 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -25,8 +25,14 @@ static inline int __get_user_sigset(sigset_t *dst, const sigset_t __user *src)
return __get_user(dst->sig[0], (u64 __user *)&src->sig[0]);
}
-#define unsafe_get_user_sigset(dst, src, label) \
- unsafe_get_user((dst)->sig[0], (u64 __user *)&(src)->sig[0], label)
+#define unsafe_get_user_sigset(dst, src, label) do { \
+ sigset_t *__dst = dst; \
+ const sigset_t __user *__src = src; \
+ int i; \
+ \
+ for (i = 0; i < _NSIG_WORDS; i++) \
+ unsafe_get_user(__dst->sig[i], &__src->sig[i], label); \
+} while (0)
#ifdef CONFIG_VSX
extern unsigned long copy_vsx_to_user(void __user *to,
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 00a9c9cd6d42..3e053e2fd6b6 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1063,7 +1063,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
* We kill the task with a SIGSEGV in this situation.
*/
if (do_setcontext(new_ctx, regs, 0)) {
- force_fatal_sig(SIGSEGV);
+ force_exit_sig(SIGSEGV);
return -EFAULT;
}
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index ef518535d436..d1e1fc0acbea 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -704,7 +704,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
*/
if (__get_user_sigset(&set, &new_ctx->uc_sigmask)) {
- force_fatal_sig(SIGSEGV);
+ force_exit_sig(SIGSEGV);
return -EFAULT;
}
set_current_blocked(&set);
@@ -713,7 +713,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
return -EFAULT;
if (__unsafe_restore_sigcontext(current, NULL, 0, &new_ctx->uc_mcontext)) {
user_read_access_end();
- force_fatal_sig(SIGSEGV);
+ force_exit_sig(SIGSEGV);
return -EFAULT;
}
user_read_access_end();
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 7bef917cc84e..15109af9d075 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -528,3 +528,4 @@
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
+449 common futex_waitv sys_futex_waitv
diff --git a/arch/powerpc/kernel/watchdog.c b/arch/powerpc/kernel/watchdog.c
index f9ea0e5357f9..3fa6d240bade 100644
--- a/arch/powerpc/kernel/watchdog.c
+++ b/arch/powerpc/kernel/watchdog.c
@@ -187,6 +187,12 @@ static void watchdog_smp_panic(int cpu, u64 tb)
if (sysctl_hardlockup_all_cpu_backtrace)
trigger_allbutself_cpu_backtrace();
+ /*
+ * Force flush any remote buffers that might be stuck in IRQ context
+ * and therefore could not run their irq_work.
+ */
+ printk_trigger_flush();
+
if (hardlockup_panic)
nmi_panic(NULL, "Hard LOCKUP");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.