summaryrefslogtreecommitdiff
path: root/arch/mips/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/Makefile2
-rw-r--r--arch/mips/kernel/cevt-r4k.c7
-rw-r--r--arch/mips/kernel/csrc-r4k.c4
-rw-r--r--arch/mips/kernel/elf.c19
-rw-r--r--arch/mips/kernel/head.S21
-rw-r--r--arch/mips/kernel/mips-r2-to-r6-emul.c8
-rw-r--r--arch/mips/kernel/process.c14
-rw-r--r--arch/mips/kernel/scall64-n32.S2
-rw-r--r--arch/mips/kernel/scall64-o32.S2
-rw-r--r--arch/mips/kernel/segment.c13
-rw-r--r--arch/mips/kernel/setup.c4
-rw-r--r--arch/mips/kernel/signal.c8
-rw-r--r--arch/mips/kernel/signal32.c288
-rw-r--r--arch/mips/kernel/signal_o32.c285
-rw-r--r--arch/mips/kernel/smp-bmips.c1
-rw-r--r--arch/mips/kernel/smp-cps.c42
-rw-r--r--arch/mips/kernel/smp.c34
-rw-r--r--arch/mips/kernel/traps.c4
-rw-r--r--arch/mips/kernel/vdso.c10
19 files changed, 437 insertions, 331 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index e6053d07072f..4a603a3ea657 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,7 +71,7 @@ obj-$(CONFIG_32BIT) += scall32-o32.o
obj-$(CONFIG_64BIT) += scall64-64.o
obj-$(CONFIG_MIPS32_COMPAT) += linux32.o ptrace32.o signal32.o
obj-$(CONFIG_MIPS32_N32) += binfmt_elfn32.o scall64-n32.o signal_n32.o
-obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o
+obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o signal_o32.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_PROC_FS) += proc.o
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index e4c21bbf9422..804d2a2a19fe 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -276,12 +276,7 @@ int r4k_clockevent_init(void)
CLOCK_EVT_FEAT_C3STOP |
CLOCK_EVT_FEAT_PERCPU;
- clockevent_set_clock(cd, mips_hpt_frequency);
-
- /* Calculate the min / max delta */
- cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
min_delta = calculate_min_delta();
- cd->min_delta_ns = clockevent_delta2ns(min_delta, cd);
cd->rating = 300;
cd->irq = irq;
@@ -289,7 +284,7 @@ int r4k_clockevent_init(void)
cd->set_next_event = mips_next_event;
cd->event_handler = mips_event_handler;
- clockevents_register_device(cd);
+ clockevents_config_and_register(cd, mips_hpt_frequency, min_delta, 0x7fffffff);
if (cp0_timer_irq_installed)
return 0;
diff --git a/arch/mips/kernel/csrc-r4k.c b/arch/mips/kernel/csrc-r4k.c
index 1f910563fdf6..d76275da54cb 100644
--- a/arch/mips/kernel/csrc-r4k.c
+++ b/arch/mips/kernel/csrc-r4k.c
@@ -23,7 +23,7 @@ static struct clocksource clocksource_mips = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static u64 notrace r4k_read_sched_clock(void)
+static u64 __maybe_unused notrace r4k_read_sched_clock(void)
{
return read_c0_count();
}
@@ -82,7 +82,9 @@ int __init init_r4k_clocksource(void)
clocksource_register_hz(&clocksource_mips, mips_hpt_frequency);
+#ifndef CONFIG_CPU_FREQ
sched_clock_register(r4k_read_sched_clock, 32, mips_hpt_frequency);
+#endif
return 0;
}
diff --git a/arch/mips/kernel/elf.c b/arch/mips/kernel/elf.c
index e6eb7f1f7723..6430bff21fff 100644
--- a/arch/mips/kernel/elf.c
+++ b/arch/mips/kernel/elf.c
@@ -8,9 +8,12 @@
* option) any later version.
*/
+#include <linux/binfmts.h>
#include <linux/elf.h>
+#include <linux/export.h>
#include <linux/sched.h>
+#include <asm/cpu-features.h>
#include <asm/cpu-info.h>
/* Whether to accept legacy-NaN and 2008-NaN user binaries. */
@@ -326,3 +329,19 @@ void mips_set_personality_nan(struct arch_elf_state *state)
BUG();
}
}
+
+int mips_elf_read_implies_exec(void *elf_ex, int exstack)
+{
+ if (exstack != EXSTACK_DISABLE_X) {
+ /* The binary doesn't request a non-executable stack */
+ return 1;
+ }
+
+ if (!cpu_has_rixi) {
+ /* The CPU doesn't support non-executable memory */
+ return 1;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(mips_elf_read_implies_exec);
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 56e8fede3fd8..cf052204eb0a 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -93,21 +93,24 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
jr t0
0:
+#ifdef CONFIG_USE_OF
#ifdef CONFIG_MIPS_RAW_APPENDED_DTB
- PTR_LA t0, __appended_dtb
+ PTR_LA t2, __appended_dtb
#ifdef CONFIG_CPU_BIG_ENDIAN
li t1, 0xd00dfeed
#else
li t1, 0xedfe0dd0
#endif
- lw t2, (t0)
- bne t1, t2, not_found
- nop
+ lw t0, (t2)
+ beq t0, t1, dtb_found
+#endif
+ li t1, -2
+ beq a0, t1, dtb_found
+ move t2, a1
- move a1, t0
- PTR_LI a0, -2
-not_found:
+ li t2, 0
+dtb_found:
#endif
PTR_LA t0, __bss_start # clear .bss
LONG_S zero, (t0)
@@ -122,6 +125,10 @@ not_found:
LONG_S a2, fw_arg2
LONG_S a3, fw_arg3
+#ifdef CONFIG_USE_OF
+ LONG_S t2, fw_passed_dtb
+#endif
+
MTC0 zero, CP0_CONTEXT # clear context register
PTR_LA $28, init_thread_union
/* Set the SP after an empty pt_regs. */
diff --git a/arch/mips/kernel/mips-r2-to-r6-emul.c b/arch/mips/kernel/mips-r2-to-r6-emul.c
index 43fbadc78d0a..c3372cac6db2 100644
--- a/arch/mips/kernel/mips-r2-to-r6-emul.c
+++ b/arch/mips/kernel/mips-r2-to-r6-emul.c
@@ -283,7 +283,7 @@ static int jr_func(struct pt_regs *regs, u32 ir)
err = mipsr6_emul(regs, nir);
if (err > 0) {
regs->cp0_epc = nepc;
- err = mips_dsemul(regs, nir, cepc);
+ err = mips_dsemul(regs, nir, epc, cepc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
@@ -1033,7 +1033,7 @@ repeat:
if (nir) {
err = mipsr6_emul(regs, nir);
if (err > 0) {
- err = mips_dsemul(regs, nir, cpc);
+ err = mips_dsemul(regs, nir, epc, cpc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
@@ -1082,7 +1082,7 @@ repeat:
if (nir) {
err = mipsr6_emul(regs, nir);
if (err > 0) {
- err = mips_dsemul(regs, nir, cpc);
+ err = mips_dsemul(regs, nir, epc, cpc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
@@ -1149,7 +1149,7 @@ repeat:
if (nir) {
err = mipsr6_emul(regs, nir);
if (err > 0) {
- err = mips_dsemul(regs, nir, cpc);
+ err = mips_dsemul(regs, nir, epc, cpc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 813ed7829c61..7429ad09fbe3 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -30,6 +30,7 @@
#include <asm/asm.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
+#include <asm/dsemul.h>
#include <asm/dsp.h>
#include <asm/fpu.h>
#include <asm/msa.h>
@@ -68,11 +69,22 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
lose_fpu(0);
clear_thread_flag(TIF_MSA_CTX_LIVE);
clear_used_math();
+ atomic_set(&current->thread.bd_emu_frame, BD_EMUFRAME_NONE);
init_dsp();
regs->cp0_epc = pc;
regs->regs[29] = sp;
}
+void exit_thread(struct task_struct *tsk)
+{
+ /*
+ * User threads may have allocated a delay slot emulation frame.
+ * If so, clean up that allocation.
+ */
+ if (!(current->flags & PF_KTHREAD))
+ dsemul_thread_cleanup(tsk);
+}
+
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
/*
@@ -159,6 +171,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
clear_tsk_thread_flag(p, TIF_FPUBOUND);
#endif /* CONFIG_MIPS_MT_FPAFF */
+ atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE);
+
if (clone_flags & CLONE_SETTLS)
ti->tp_value = regs->regs[7];
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 9c0b387d6427..51d3988933f8 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -348,7 +348,7 @@ EXPORT(sysn32_call_table)
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key
PTR sys_request_key
- PTR sys_keyctl /* 6245 */
+ PTR compat_sys_keyctl /* 6245 */
PTR sys_set_thread_area
PTR sys_inotify_init
PTR sys_inotify_add_watch
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index f4f28b1580de..6efa7136748f 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -504,7 +504,7 @@ EXPORT(sys32_call_table)
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key /* 4280 */
PTR sys_request_key
- PTR sys_keyctl
+ PTR compat_sys_keyctl
PTR sys_set_thread_area
PTR sys_inotify_init
PTR sys_inotify_add_watch /* 4285 */
diff --git a/arch/mips/kernel/segment.c b/arch/mips/kernel/segment.c
index 87bc74a5a518..2703f218202e 100644
--- a/arch/mips/kernel/segment.c
+++ b/arch/mips/kernel/segment.c
@@ -26,17 +26,20 @@ static void build_segment_config(char *str, unsigned int cfg)
/*
* Access modes MK, MSK and MUSK are mapped segments. Therefore
- * there is no direct physical address mapping.
+ * there is no direct physical address mapping unless it becomes
+ * unmapped uncached at error level due to EU.
*/
- if ((am == 0) || (am > 3)) {
+ if ((am == 0) || (am > 3) || (cfg & MIPS_SEGCFG_EU))
str += sprintf(str, " %03lx",
((cfg & MIPS_SEGCFG_PA) >> MIPS_SEGCFG_PA_SHIFT));
+ else
+ str += sprintf(str, " UND");
+
+ if ((am == 0) || (am > 3))
str += sprintf(str, " %01ld",
((cfg & MIPS_SEGCFG_C) >> MIPS_SEGCFG_C_SHIFT));
- } else {
- str += sprintf(str, " UND");
+ else
str += sprintf(str, " U");
- }
/* Exception configuration. */
str += sprintf(str, " %01ld\n",
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index ef408a03e818..36cf8d65c47d 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -875,6 +875,10 @@ void __init setup_arch(char **cmdline_p)
unsigned long kernelsp[NR_CPUS];
unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
+#ifdef CONFIG_USE_OF
+unsigned long fw_passed_dtb;
+#endif
+
#ifdef CONFIG_DEBUG_FS
struct dentry *mips_debugfs_dir;
static int __init debugfs_mips(void)
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 1975cd2f7de6..9e224469c788 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -772,6 +772,14 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
struct mips_abi *abi = current->thread.abi;
void *vdso = current->mm->context.vdso;
+ /*
+ * If we were emulating a delay slot instruction, exit that frame such
+ * that addresses in the sigframe are as expected for userland and we
+ * don't have a problem if we reuse the thread's frame for an
+ * instruction within the signal handler.
+ */
+ dsemul_thread_rollback(regs);
+
if (regs->regs[0]) {
switch(regs->regs[2]) {
case ERESTART_RESTARTBLOCK:
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 78c8349d151c..97b7c51b8251 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -6,129 +6,26 @@
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 1994 - 2000, 2006 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2016, Imagination Technologies Ltd.
*/
-#include <linux/cache.h>
-#include <linux/compat.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
+#include <linux/compiler.h>
+#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/suspend.h>
-#include <linux/compiler.h>
-#include <linux/uaccess.h>
-#include <asm/abi.h>
-#include <asm/asm.h>
+#include <asm/compat.h>
#include <asm/compat-signal.h>
-#include <linux/bitops.h>
-#include <asm/cacheflush.h>
-#include <asm/sim.h>
-#include <asm/ucontext.h>
-#include <asm/fpu.h>
-#include <asm/war.h>
-#include <asm/dsp.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
#include "signal-common.h"
-/*
- * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
- */
-#define __NR_O32_restart_syscall 4253
-
/* 32-bit compatibility types */
typedef unsigned int __sighandler32_t;
typedef void (*vfptr_t)(void);
-struct ucontext32 {
- u32 uc_flags;
- s32 uc_link;
- compat_stack_t uc_stack;
- struct sigcontext32 uc_mcontext;
- compat_sigset_t uc_sigmask; /* mask last for extensibility */
-};
-
-struct sigframe32 {
- u32 sf_ass[4]; /* argument save space for o32 */
- u32 sf_pad[2]; /* Was: signal trampoline */
- struct sigcontext32 sf_sc;
- compat_sigset_t sf_mask;
-};
-
-struct rt_sigframe32 {
- u32 rs_ass[4]; /* argument save space for o32 */
- u32 rs_pad[2]; /* Was: signal trampoline */
- compat_siginfo_t rs_info;
- struct ucontext32 rs_uc;
-};
-
-static int setup_sigcontext32(struct pt_regs *regs,
- struct sigcontext32 __user *sc)
-{
- int err = 0;
- int i;
-
- err |= __put_user(regs->cp0_epc, &sc->sc_pc);
-
- err |= __put_user(0, &sc->sc_regs[0]);
- for (i = 1; i < 32; i++)
- err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
-
- err |= __put_user(regs->hi, &sc->sc_mdhi);
- err |= __put_user(regs->lo, &sc->sc_mdlo);
- if (cpu_has_dsp) {
- err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
- err |= __put_user(mfhi1(), &sc->sc_hi1);
- err |= __put_user(mflo1(), &sc->sc_lo1);
- err |= __put_user(mfhi2(), &sc->sc_hi2);
- err |= __put_user(mflo2(), &sc->sc_lo2);
- err |= __put_user(mfhi3(), &sc->sc_hi3);
- err |= __put_user(mflo3(), &sc->sc_lo3);
- }
-
- /*
- * Save FPU state to signal context. Signal handler
- * will "inherit" current FPU state.
- */
- err |= protected_save_fp_context(sc);
-
- return err;
-}
-
-static int restore_sigcontext32(struct pt_regs *regs,
- struct sigcontext32 __user *sc)
-{
- int err = 0;
- s32 treg;
- int i;
-
- /* Always make any pending restarted system calls return -EINTR */
- current->restart_block.fn = do_no_restart_syscall;
-
- err |= __get_user(regs->cp0_epc, &sc->sc_pc);
- err |= __get_user(regs->hi, &sc->sc_mdhi);
- err |= __get_user(regs->lo, &sc->sc_mdlo);
- if (cpu_has_dsp) {
- err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
- err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
- err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
- err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
- err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
- err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
- err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
- }
-
- for (i = 1; i < 32; i++)
- err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
-
- return err ?: protected_restore_fp_context(sc);
-}
-
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
@@ -247,176 +144,3 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
return 0;
}
-
-asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
-{
- struct sigframe32 __user *frame;
- sigset_t blocked;
- int sig;
-
- frame = (struct sigframe32 __user *) regs.regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
- goto badframe;
-
- set_current_blocked(&blocked);
-
- sig = restore_sigcontext32(&regs, &frame->sf_sc);
- if (sig < 0)
- goto badframe;
- else if (sig)
- force_sig(sig, current);
-
- /*
- * Don't let your children do this ...
- */
- __asm__ __volatile__(
- "move\t$29, %0\n\t"
- "j\tsyscall_exit"
- :/* no outputs */
- :"r" (&regs));
- /* Unreached */
-
-badframe:
- force_sig(SIGSEGV, current);
-}
-
-asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
-{
- struct rt_sigframe32 __user *frame;
- sigset_t set;
- int sig;
-
- frame = (struct rt_sigframe32 __user *) regs.regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
- goto badframe;
-
- set_current_blocked(&set);
-
- sig = restore_sigcontext32(&regs, &frame->rs_uc.uc_mcontext);
- if (sig < 0)
- goto badframe;
- else if (sig)
- force_sig(sig, current);
-
- if (compat_restore_altstack(&frame->rs_uc.uc_stack))
- goto badframe;
-
- /*
- * Don't let your children do this ...
- */
- __asm__ __volatile__(
- "move\t$29, %0\n\t"
- "j\tsyscall_exit"
- :/* no outputs */
- :"r" (&regs));
- /* Unreached */
-
-badframe:
- force_sig(SIGSEGV, current);
-}
-
-static int setup_frame_32(void *sig_return, struct ksignal *ksig,
- struct pt_regs *regs, sigset_t *set)
-{
- struct sigframe32 __user *frame;
- int err = 0;
-
- frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
- return -EFAULT;
-
- err |= setup_sigcontext32(regs, &frame->sf_sc);
- err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
-
- if (err)
- return -EFAULT;
-
- /*
- * Arguments to signal handler:
- *
- * a0 = signal number
- * a1 = 0 (should be cause)
- * a2 = pointer to struct sigcontext
- *
- * $25 and c0_epc point to the signal handler, $29 points to the
- * struct sigframe.
- */
- regs->regs[ 4] = ksig->sig;
- regs->regs[ 5] = 0;
- regs->regs[ 6] = (unsigned long) &frame->sf_sc;
- regs->regs[29] = (unsigned long) frame;
- regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
-
- DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
- current->comm, current->pid,
- frame, regs->cp0_epc, regs->regs[31]);
-
- return 0;
-}
-
-static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
- struct pt_regs *regs, sigset_t *set)
-{
- struct rt_sigframe32 __user *frame;
- int err = 0;
-
- frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
- return -EFAULT;
-
- /* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
- err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
-
- /* Create the ucontext. */
- err |= __put_user(0, &frame->rs_uc.uc_flags);
- err |= __put_user(0, &frame->rs_uc.uc_link);
- err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
- err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
- err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
-
- if (err)
- return -EFAULT;
-
- /*
- * Arguments to signal handler:
- *
- * a0 = signal number
- * a1 = 0 (should be cause)
- * a2 = pointer to ucontext
- *
- * $25 and c0_epc point to the signal handler, $29 points to
- * the struct rt_sigframe32.
- */
- regs->regs[ 4] = ksig->sig;
- regs->regs[ 5] = (unsigned long) &frame->rs_info;
- regs->regs[ 6] = (unsigned long) &frame->rs_uc;
- regs->regs[29] = (unsigned long) frame;
- regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
-
- DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
- current->comm, current->pid,
- frame, regs->cp0_epc, regs->regs[31]);
-
- return 0;
-}
-
-/*
- * o32 compatibility on 64-bit kernels, without DSP ASE
- */
-struct mips_abi mips_abi_32 = {
- .setup_frame = setup_frame_32,
- .setup_rt_frame = setup_rt_frame_32,
- .restart = __NR_O32_restart_syscall,
-
- .off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs),
- .off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr),
- .off_sc_used_math = offsetof(struct sigcontext32, sc_used_math),
-
- .vdso = &vdso_image_o32,
-};
diff --git a/arch/mips/kernel/signal_o32.c b/arch/mips/kernel/signal_o32.c
new file mode 100644
index 000000000000..5e169fc5ca5c
--- /dev/null
+++ b/arch/mips/kernel/signal_o32.c
@@ -0,0 +1,285 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 1994 - 2000, 2006 Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2016, Imagination Technologies Ltd.
+ */
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/uaccess.h>
+
+#include <asm/abi.h>
+#include <asm/compat-signal.h>
+#include <asm/dsp.h>
+#include <asm/sim.h>
+#include <asm/unistd.h>
+
+#include "signal-common.h"
+
+/*
+ * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
+ */
+#define __NR_O32_restart_syscall 4253
+
+struct sigframe32 {
+ u32 sf_ass[4]; /* argument save space for o32 */
+ u32 sf_pad[2]; /* Was: signal trampoline */
+ struct sigcontext32 sf_sc;
+ compat_sigset_t sf_mask;
+};
+
+struct ucontext32 {
+ u32 uc_flags;
+ s32 uc_link;
+ compat_stack_t uc_stack;
+ struct sigcontext32 uc_mcontext;
+ compat_sigset_t uc_sigmask; /* mask last for extensibility */
+};
+
+struct rt_sigframe32 {
+ u32 rs_ass[4]; /* argument save space for o32 */
+ u32 rs_pad[2]; /* Was: signal trampoline */
+ compat_siginfo_t rs_info;
+ struct ucontext32 rs_uc;
+};
+
+static int setup_sigcontext32(struct pt_regs *regs,
+ struct sigcontext32 __user *sc)
+{
+ int err = 0;
+ int i;
+
+ err |= __put_user(regs->cp0_epc, &sc->sc_pc);
+
+ err |= __put_user(0, &sc->sc_regs[0]);
+ for (i = 1; i < 32; i++)
+ err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
+
+ err |= __put_user(regs->hi, &sc->sc_mdhi);
+ err |= __put_user(regs->lo, &sc->sc_mdlo);
+ if (cpu_has_dsp) {
+ err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
+ err |= __put_user(mfhi1(), &sc->sc_hi1);
+ err |= __put_user(mflo1(), &sc->sc_lo1);
+ err |= __put_user(mfhi2(), &sc->sc_hi2);
+ err |= __put_user(mflo2(), &sc->sc_lo2);
+ err |= __put_user(mfhi3(), &sc->sc_hi3);
+ err |= __put_user(mflo3(), &sc->sc_lo3);
+ }
+
+ /*
+ * Save FPU state to signal context. Signal handler
+ * will "inherit" current FPU state.
+ */
+ err |= protected_save_fp_context(sc);
+
+ return err;
+}
+
+static int restore_sigcontext32(struct pt_regs *regs,
+ struct sigcontext32 __user *sc)
+{
+ int err = 0;
+ s32 treg;
+ int i;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current->restart_block.fn = do_no_restart_syscall;
+
+ err |= __get_user(regs->cp0_epc, &sc->sc_pc);
+ err |= __get_user(regs->hi, &sc->sc_mdhi);
+ err |= __get_user(regs->lo, &sc->sc_mdlo);
+ if (cpu_has_dsp) {
+ err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
+ err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
+ err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
+ err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
+ err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
+ err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
+ err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
+ }
+
+ for (i = 1; i < 32; i++)
+ err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
+
+ return err ?: protected_restore_fp_context(sc);
+}
+
+static int setup_frame_32(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
+{
+ struct sigframe32 __user *frame;
+ int err = 0;
+
+ frame = get_sigframe(ksig, regs, sizeof(*frame));
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return -EFAULT;
+
+ err |= setup_sigcontext32(regs, &frame->sf_sc);
+ err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
+
+ if (err)
+ return -EFAULT;
+
+ /*
+ * Arguments to signal handler:
+ *
+ * a0 = signal number
+ * a1 = 0 (should be cause)
+ * a2 = pointer to struct sigcontext
+ *
+ * $25 and c0_epc point to the signal handler, $29 points to the
+ * struct sigframe.
+ */
+ regs->regs[ 4] = ksig->sig;
+ regs->regs[ 5] = 0;
+ regs->regs[ 6] = (unsigned long) &frame->sf_sc;
+ regs->regs[29] = (unsigned long) frame;
+ regs->regs[31] = (unsigned long) sig_return;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
+
+ DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
+ current->comm, current->pid,
+ frame, regs->cp0_epc, regs->regs[31]);
+
+ return 0;
+}
+
+asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
+{
+ struct rt_sigframe32 __user *frame;
+ sigset_t set;
+ int sig;
+
+ frame = (struct rt_sigframe32 __user *) regs.regs[29];
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
+ goto badframe;
+
+ set_current_blocked(&set);
+
+ sig = restore_sigcontext32(&regs, &frame->rs_uc.uc_mcontext);
+ if (sig < 0)
+ goto badframe;
+ else if (sig)
+ force_sig(sig, current);
+
+ if (compat_restore_altstack(&frame->rs_uc.uc_stack))
+ goto badframe;
+
+ /*
+ * Don't let your children do this ...
+ */
+ __asm__ __volatile__(
+ "move\t$29, %0\n\t"
+ "j\tsyscall_exit"
+ :/* no outputs */
+ :"r" (&regs));
+ /* Unreached */
+
+badframe:
+ force_sig(SIGSEGV, current);
+}
+
+static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
+ struct pt_regs *regs, sigset_t *set)
+{
+ struct rt_sigframe32 __user *frame;
+ int err = 0;
+
+ frame = get_sigframe(ksig, regs, sizeof(*frame));
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return -EFAULT;
+
+ /* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
+ err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
+
+ /* Create the ucontext. */
+ err |= __put_user(0, &frame->rs_uc.uc_flags);
+ err |= __put_user(0, &frame->rs_uc.uc_link);
+ err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
+ err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
+ err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
+
+ if (err)
+ return -EFAULT;
+
+ /*
+ * Arguments to signal handler:
+ *
+ * a0 = signal number
+ * a1 = 0 (should be cause)
+ * a2 = pointer to ucontext
+ *
+ * $25 and c0_epc point to the signal handler, $29 points to
+ * the struct rt_sigframe32.
+ */
+ regs->regs[ 4] = ksig->sig;
+ regs->regs[ 5] = (unsigned long) &frame->rs_info;
+ regs->regs[ 6] = (unsigned long) &frame->rs_uc;
+ regs->regs[29] = (unsigned long) frame;
+ regs->regs[31] = (unsigned long) sig_return;
+ regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
+
+ DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
+ current->comm, current->pid,
+ frame, regs->cp0_epc, regs->regs[31]);
+
+ return 0;
+}
+
+/*
+ * o32 compatibility on 64-bit kernels, without DSP ASE
+ */
+struct mips_abi mips_abi_32 = {
+ .setup_frame = setup_frame_32,
+ .setup_rt_frame = setup_rt_frame_32,
+ .restart = __NR_O32_restart_syscall,
+
+ .off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs),
+ .off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr),
+ .off_sc_used_math = offsetof(struct sigcontext32, sc_used_math),
+
+ .vdso = &vdso_image_o32,
+};
+
+
+asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
+{
+ struct sigframe32 __user *frame;
+ sigset_t blocked;
+ int sig;
+
+ frame = (struct sigframe32 __user *) regs.regs[29];
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
+ goto badframe;
+
+ set_current_blocked(&blocked);
+
+ sig = restore_sigcontext32(&regs, &frame->sf_sc);
+ if (sig < 0)
+ goto badframe;
+ else if (sig)
+ force_sig(sig, current);
+
+ /*
+ * Don't let your children do this ...
+ */
+ __asm__ __volatile__(
+ "move\t$29, %0\n\t"
+ "j\tsyscall_exit"
+ :/* no outputs */
+ :"r" (&regs));
+ /* Unreached */
+
+badframe:
+ force_sig(SIGSEGV, current);
+}
diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index e02addc0307f..6d0f1321e084 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -363,6 +363,7 @@ static int bmips_cpu_disable(void)
pr_info("SMP: CPU%d is offline\n", cpu);
set_cpu_online(cpu, false);
+ calculate_cpu_foreign_map();
cpumask_clear_cpu(cpu, &cpu_callin_map);
clear_c0_status(IE_IRQ5);
diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c
index 05b3201271b4..e9d9fc6c754c 100644
--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -206,7 +206,7 @@ err_out:
}
}
-static void boot_core(unsigned core)
+static void boot_core(unsigned int core, unsigned int vpe_id)
{
u32 access, stat, seq_state;
unsigned timeout;
@@ -233,8 +233,9 @@ static void boot_core(unsigned core)
mips_cpc_lock_other(core);
if (mips_cm_revision() >= CM_REV_CM3) {
- /* Run VP0 following the reset */
- write_cpc_co_vp_run(0x1);
+ /* Run only the requested VP following the reset */
+ write_cpc_co_vp_stop(0xf);
+ write_cpc_co_vp_run(1 << vpe_id);
/*
* Ensure that the VP_RUN register is written before the
@@ -306,7 +307,7 @@ static void cps_boot_secondary(int cpu, struct task_struct *idle)
if (!test_bit(core, core_power)) {
/* Boot a VPE on a powered down core */
- boot_core(core);
+ boot_core(core, vpe_id);
goto out;
}
@@ -397,6 +398,7 @@ static int cps_cpu_disable(void)
atomic_sub(1 << cpu_vpe_id(&current_cpu_data), &core_cfg->vpe_mask);
smp_mb__after_atomic();
set_cpu_online(cpu, false);
+ calculate_cpu_foreign_map();
cpumask_clear_cpu(cpu, &cpu_callin_map);
return 0;
@@ -411,14 +413,16 @@ static enum {
void play_dead(void)
{
- unsigned cpu, core;
+ unsigned int cpu, core, vpe_id;
local_irq_disable();
idle_task_exit();
cpu = smp_processor_id();
cpu_death = CPU_DEATH_POWER;
- if (cpu_has_mipsmt) {
+ pr_debug("CPU%d going offline\n", cpu);
+
+ if (cpu_has_mipsmt || cpu_has_vp) {
core = cpu_data[cpu].core;
/* Look for another online VPE within the core */
@@ -439,10 +443,21 @@ void play_dead(void)
complete(&cpu_death_chosen);
if (cpu_death == CPU_DEATH_HALT) {
- /* Halt this TC */
- write_c0_tchalt(TCHALT_H);
- instruction_hazard();
+ vpe_id = cpu_vpe_id(&cpu_data[cpu]);
+
+ pr_debug("Halting core %d VP%d\n", core, vpe_id);
+ if (cpu_has_mipsmt) {
+ /* Halt this TC */
+ write_c0_tchalt(TCHALT_H);
+ instruction_hazard();
+ } else if (cpu_has_vp) {
+ write_cpc_cl_vp_stop(1 << vpe_id);
+
+ /* Ensure that the VP_STOP register is written */
+ wmb();
+ }
} else {
+ pr_debug("Gating power to core %d\n", core);
/* Power down the core */
cps_pm_enter_state(CPS_PM_POWER_GATED);
}
@@ -469,6 +484,7 @@ static void wait_for_sibling_halt(void *ptr_cpu)
static void cps_cpu_die(unsigned int cpu)
{
unsigned core = cpu_data[cpu].core;
+ unsigned int vpe_id = cpu_vpe_id(&cpu_data[cpu]);
unsigned stat;
int err;
@@ -497,10 +513,12 @@ static void cps_cpu_die(unsigned int cpu)
* in which case the CPC will refuse to power down the core.
*/
do {
+ mips_cm_lock_other(core, vpe_id);
mips_cpc_lock_other(core);
stat = read_cpc_co_stat_conf();
stat &= CPC_Cx_STAT_CONF_SEQSTATE_MSK;
mips_cpc_unlock_other();
+ mips_cm_unlock_other();
} while (stat != CPC_Cx_STAT_CONF_SEQSTATE_D0 &&
stat != CPC_Cx_STAT_CONF_SEQSTATE_D2 &&
stat != CPC_Cx_STAT_CONF_SEQSTATE_U2);
@@ -517,6 +535,12 @@ static void cps_cpu_die(unsigned int cpu)
(void *)(unsigned long)cpu, 1);
if (err)
panic("Failed to call remote sibling CPU\n");
+ } else if (cpu_has_vp) {
+ do {
+ mips_cm_lock_other(core, vpe_id);
+ stat = read_cpc_co_vp_running();
+ mips_cm_unlock_other();
+ } while (stat & (1 << vpe_id));
}
}
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index f9d01e953acb..f95f094f36e4 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -72,7 +72,7 @@ EXPORT_SYMBOL(cpu_core_map);
* A logcal cpu mask containing only one VPE per core to
* reduce the number of IPIs on large MT systems.
*/
-cpumask_t cpu_foreign_map __read_mostly;
+cpumask_t cpu_foreign_map[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(cpu_foreign_map);
/* representing cpus for which sibling maps can be computed */
@@ -124,7 +124,7 @@ static inline void set_cpu_core_map(int cpu)
* Calculate a new cpu_foreign_map mask whenever a
* new cpu appears or disappears.
*/
-static inline void calculate_cpu_foreign_map(void)
+void calculate_cpu_foreign_map(void)
{
int i, k, core_present;
cpumask_t temp_foreign_map;
@@ -141,7 +141,9 @@ static inline void calculate_cpu_foreign_map(void)
cpumask_set_cpu(i, &temp_foreign_map);
}
- cpumask_copy(&cpu_foreign_map, &temp_foreign_map);
+ for_each_online_cpu(i)
+ cpumask_andnot(&cpu_foreign_map[i],
+ &temp_foreign_map, &cpu_sibling_map[i]);
}
struct plat_smp_ops *mp_ops;
@@ -344,16 +346,9 @@ asmlinkage void start_secondary(void)
static void stop_this_cpu(void *dummy)
{
/*
- * Remove this CPU. Be a bit slow here and
- * set the bits for every online CPU so we don't miss
- * any IPI whilst taking this VPE down.
+ * Remove this CPU:
*/
- cpumask_copy(&cpu_foreign_map, cpu_online_mask);
-
- /* Make it visible to every other CPU */
- smp_mb();
-
set_cpu_online(smp_processor_id(), false);
calculate_cpu_foreign_map();
local_irq_disable();
@@ -512,10 +507,17 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned l
smp_on_other_tlbs(flush_tlb_range_ipi, &fd);
} else {
unsigned int cpu;
+ int exec = vma->vm_flags & VM_EXEC;
for_each_online_cpu(cpu) {
+ /*
+ * flush_cache_range() will only fully flush icache if
+ * the VMA is executable, otherwise we must invalidate
+ * ASID without it appearing to has_valid_asid() as if
+ * mm has been completely unused by that CPU.
+ */
if (cpu != smp_processor_id() && cpu_context(cpu, mm))
- cpu_context(cpu, mm) = 0;
+ cpu_context(cpu, mm) = !exec;
}
}
local_flush_tlb_range(vma, start, end);
@@ -560,8 +562,14 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
unsigned int cpu;
for_each_online_cpu(cpu) {
+ /*
+ * flush_cache_page() only does partial flushes, so
+ * invalidate ASID without it appearing to
+ * has_valid_asid() as if mm has been completely unused
+ * by that CPU.
+ */
if (cpu != smp_processor_id() && cpu_context(cpu, vma->vm_mm))
- cpu_context(cpu, vma->vm_mm) = 0;
+ cpu_context(cpu, vma->vm_mm) = 1;
}
}
local_flush_tlb_page(vma, page);
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 6fb4704bd156..3de85be2486a 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -704,6 +704,7 @@ asmlinkage void do_ov(struct pt_regs *regs)
int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
{
struct siginfo si = { 0 };
+ struct vm_area_struct *vma;
switch (sig) {
case 0:
@@ -744,7 +745,8 @@ int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
si.si_addr = fault_addr;
si.si_signo = sig;
down_read(&current->mm->mmap_sem);
- if (find_vma(current->mm, (unsigned long)fault_addr))
+ vma = find_vma(current->mm, (unsigned long)fault_addr);
+ if (vma && (vma->vm_start <= (unsigned long)fault_addr))
si.si_code = SEGV_ACCERR;
else
si.si_code = SEGV_MAPERR;
diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c
index 54e1663ce639..9abe447a4b48 100644
--- a/arch/mips/kernel/vdso.c
+++ b/arch/mips/kernel/vdso.c
@@ -107,6 +107,16 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
if (down_write_killable(&mm->mmap_sem))
return -EINTR;
+ /* Map delay slot emulation page */
+ base = mmap_region(NULL, STACK_TOP, PAGE_SIZE,
+ VM_READ|VM_WRITE|VM_EXEC|
+ VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
+ 0);
+ if (IS_ERR_VALUE(base)) {
+ ret = base;
+ goto out;
+ }
+
/*
* Determine total area size. This includes the VDSO data itself, the
* data page, and the GIC user page if present. Always create a mapping
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-02 08:25:31 +0000