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authorLinus Torvalds <torvalds@linux-foundation.org>2023-02-25 12:49:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2023-02-25 12:49:29 -0800
commite534a583cc438ec2e9a7dc534c9d80d14b440718 (patch)
tree6ac37b039f0437be3a22b0e79fee272b353dd0d3
parentcac85e4616b1cf4a90844b952b49b9cbc4562530 (diff)
parent290ec1d58049e6203062d5fc796c50852112ae00 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha updates from Al Viro: "Mostly small janitorial fixes but there's also more important ones: a patch to fix loading large modules from Edward Humes, and some fixes from Al Viro" [ The fixes from Al mostly came in separately through Al's trees too and are now duplicated.. - Linus ] * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha: alpha: in_irq() cleanup alpha: lazy FPU switching alpha/boot/misc: trim unused declarations alpha/boot/tools/objstrip: fix the check for ELF header alpha/boot: fix the breakage from -isystem series... alpha: fix FEN fault handling alpha: Avoid comma separated statements alpha: fixed a typo in core_cia.c alpha: remove unused __SLOW_DOWN_IO and SLOW_DOWN_IO definitions alpha: update config files alpha: fix R_ALPHA_LITERAL reloc for large modules alpha: Add some spaces to ensure format specification alpha: replace NR_SYSCALLS by NR_syscalls alpha: Remove redundant local asm header redirections alpha: Implement "current_stack_pointer" alpha: remove redundant err variable alpha: osf_sys: reduce kernel log spamming on invalid osf_mount call typenr
-rw-r--r--arch/alpha/Kconfig1
-rw-r--r--arch/alpha/boot/stdio.c12
-rw-r--r--arch/alpha/configs/defconfig2
-rw-r--r--arch/alpha/include/asm/Kbuild1
-rw-r--r--arch/alpha/include/asm/asm-offsets.h1
-rw-r--r--arch/alpha/include/asm/div64.h1
-rw-r--r--arch/alpha/include/asm/fpu.h61
-rw-r--r--arch/alpha/include/asm/io.h4
-rw-r--r--arch/alpha/include/asm/irq_regs.h1
-rw-r--r--arch/alpha/include/asm/kdebug.h1
-rw-r--r--arch/alpha/include/asm/thread_info.h18
-rw-r--r--arch/alpha/include/asm/unistd.h2
-rw-r--r--arch/alpha/include/uapi/asm/ptrace.h2
-rw-r--r--arch/alpha/kernel/asm-offsets.c2
-rw-r--r--arch/alpha/kernel/core_cia.c2
-rw-r--r--arch/alpha/kernel/entry.S148
-rw-r--r--arch/alpha/kernel/module.c4
-rw-r--r--arch/alpha/kernel/osf_sys.c2
-rw-r--r--arch/alpha/kernel/pci_iommu.c8
-rw-r--r--arch/alpha/kernel/perf_event.c6
-rw-r--r--arch/alpha/kernel/process.c7
-rw-r--r--arch/alpha/kernel/ptrace.c18
-rw-r--r--arch/alpha/kernel/signal.c20
-rw-r--r--arch/alpha/lib/fpreg.c43
-rw-r--r--arch/alpha/lib/stacktrace.c2
-rw-r--r--kernel/trace/trace.h2
26 files changed, 217 insertions, 154 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 97fce7386b00..780d4673c3ca 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -3,6 +3,7 @@ config ALPHA
bool
default y
select ARCH_32BIT_USTAT_F_TINODE
+ select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
select ARCH_NO_PREEMPT
diff --git a/arch/alpha/boot/stdio.c b/arch/alpha/boot/stdio.c
index a5abeaf94791..faa5234b90b8 100644
--- a/arch/alpha/boot/stdio.c
+++ b/arch/alpha/boot/stdio.c
@@ -42,8 +42,8 @@ static int skip_atoi(const char **s)
static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
{
- char c,sign,tmp[66];
- const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
+ char c, sign, tmp[66];
+ const char *digits = "0123456789abcdefghijklmnopqrstuvwxyz";
int i;
if (type & LARGE)
@@ -83,14 +83,14 @@ static char * number(char * str, unsigned long long num, int base, int size, int
precision = i;
size -= precision;
if (!(type&(ZEROPAD+LEFT)))
- while(size-->0)
+ while (size-- > 0)
*str++ = ' ';
if (sign)
*str++ = sign;
if (type & SPECIAL) {
if (base==8)
*str++ = '0';
- else if (base==16) {
+ else if (base == 16) {
*str++ = '0';
*str++ = digits[33];
}
@@ -125,7 +125,7 @@ int vsprintf(char *buf, const char *fmt, va_list args)
/* 'z' changed to 'Z' --davidm 1/25/99 */
- for (str=buf ; *fmt ; ++fmt) {
+ for (str = buf ; *fmt ; ++fmt) {
if (*fmt != '%') {
*str++ = *fmt;
continue;
@@ -296,7 +296,7 @@ int sprintf(char * buf, const char *fmt, ...)
int i;
va_start(args, fmt);
- i=vsprintf(buf,fmt,args);
+ i = vsprintf(buf, fmt, args);
va_end(args);
return i;
}
diff --git a/arch/alpha/configs/defconfig b/arch/alpha/configs/defconfig
index 6a39fe8ce9e5..1816c1dc22b1 100644
--- a/arch/alpha/configs/defconfig
+++ b/arch/alpha/configs/defconfig
@@ -39,14 +39,12 @@ CONFIG_PATA_CYPRESS=y
CONFIG_ATA_GENERIC=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
-CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_VORTEX=y
CONFIG_NET_TULIP=y
CONFIG_DE2104X=m
CONFIG_TULIP=y
CONFIG_TULIP_MMIO=y
-CONFIG_NET_PCI=y
CONFIG_YELLOWFIN=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
index 54f5126628c6..dd31e97edae8 100644
--- a/arch/alpha/include/asm/Kbuild
+++ b/arch/alpha/include/asm/Kbuild
@@ -2,6 +2,7 @@
generated-y += syscall_table.h
generic-y += agp.h
+generic-y += asm-offsets.h
generic-y += export.h
generic-y += kvm_para.h
generic-y += mcs_spinlock.h
diff --git a/arch/alpha/include/asm/asm-offsets.h b/arch/alpha/include/asm/asm-offsets.h
deleted file mode 100644
index d370ee36a182..000000000000
--- a/arch/alpha/include/asm/asm-offsets.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <generated/asm-offsets.h>
diff --git a/arch/alpha/include/asm/div64.h b/arch/alpha/include/asm/div64.h
deleted file mode 100644
index 6cd978cefb28..000000000000
--- a/arch/alpha/include/asm/div64.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/div64.h>
diff --git a/arch/alpha/include/asm/fpu.h b/arch/alpha/include/asm/fpu.h
index b9691405e56b..30b24135dd7a 100644
--- a/arch/alpha/include/asm/fpu.h
+++ b/arch/alpha/include/asm/fpu.h
@@ -15,21 +15,27 @@ rdfpcr(void)
{
unsigned long tmp, ret;
+ preempt_disable();
+ if (current_thread_info()->status & TS_SAVED_FP) {
+ ret = current_thread_info()->fp[31];
+ } else {
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
- __asm__ __volatile__ (
- "ftoit $f0,%0\n\t"
- "mf_fpcr $f0\n\t"
- "ftoit $f0,%1\n\t"
- "itoft %0,$f0"
- : "=r"(tmp), "=r"(ret));
+ __asm__ __volatile__ (
+ "ftoit $f0,%0\n\t"
+ "mf_fpcr $f0\n\t"
+ "ftoit $f0,%1\n\t"
+ "itoft %0,$f0"
+ : "=r"(tmp), "=r"(ret));
#else
- __asm__ __volatile__ (
- "stt $f0,%0\n\t"
- "mf_fpcr $f0\n\t"
- "stt $f0,%1\n\t"
- "ldt $f0,%0"
- : "=m"(tmp), "=m"(ret));
+ __asm__ __volatile__ (
+ "stt $f0,%0\n\t"
+ "mf_fpcr $f0\n\t"
+ "stt $f0,%1\n\t"
+ "ldt $f0,%0"
+ : "=m"(tmp), "=m"(ret));
#endif
+ }
+ preempt_enable();
return ret;
}
@@ -39,21 +45,28 @@ wrfpcr(unsigned long val)
{
unsigned long tmp;
+ preempt_disable();
+ if (current_thread_info()->status & TS_SAVED_FP) {
+ current_thread_info()->status |= TS_RESTORE_FP;
+ current_thread_info()->fp[31] = val;
+ } else {
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
- __asm__ __volatile__ (
- "ftoit $f0,%0\n\t"
- "itoft %1,$f0\n\t"
- "mt_fpcr $f0\n\t"
- "itoft %0,$f0"
- : "=&r"(tmp) : "r"(val));
+ __asm__ __volatile__ (
+ "ftoit $f0,%0\n\t"
+ "itoft %1,$f0\n\t"
+ "mt_fpcr $f0\n\t"
+ "itoft %0,$f0"
+ : "=&r"(tmp) : "r"(val));
#else
- __asm__ __volatile__ (
- "stt $f0,%0\n\t"
- "ldt $f0,%1\n\t"
- "mt_fpcr $f0\n\t"
- "ldt $f0,%0"
- : "=m"(tmp) : "m"(val));
+ __asm__ __volatile__ (
+ "stt $f0,%0\n\t"
+ "ldt $f0,%1\n\t"
+ "mt_fpcr $f0\n\t"
+ "ldt $f0,%0"
+ : "=m"(tmp) : "m"(val));
#endif
+ }
+ preempt_enable();
}
static inline unsigned long
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index 1c3605d874e9..7aeaf7c30a6f 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -14,10 +14,6 @@
the implementation we have here matches that interface. */
#include <asm-generic/iomap.h>
-/* We don't use IO slowdowns on the Alpha, but.. */
-#define __SLOW_DOWN_IO do { } while (0)
-#define SLOW_DOWN_IO do { } while (0)
-
/*
* Virtual -> physical identity mapping starts at this offset
*/
diff --git a/arch/alpha/include/asm/irq_regs.h b/arch/alpha/include/asm/irq_regs.h
deleted file mode 100644
index 3dd9c0b70270..000000000000
--- a/arch/alpha/include/asm/irq_regs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/irq_regs.h>
diff --git a/arch/alpha/include/asm/kdebug.h b/arch/alpha/include/asm/kdebug.h
deleted file mode 100644
index 6ece1b037665..000000000000
--- a/arch/alpha/include/asm/kdebug.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/kdebug.h>
diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h
index 082631465074..4a4d00b37986 100644
--- a/arch/alpha/include/asm/thread_info.h
+++ b/arch/alpha/include/asm/thread_info.h
@@ -26,6 +26,7 @@ struct thread_info {
int bpt_nsaved;
unsigned long bpt_addr[2]; /* breakpoint handling */
unsigned int bpt_insn[2];
+ unsigned long fp[32];
};
/*
@@ -41,6 +42,8 @@ struct thread_info {
register struct thread_info *__current_thread_info __asm__("$8");
#define current_thread_info() __current_thread_info
+register unsigned long *current_stack_pointer __asm__ ("$30");
+
#endif /* __ASSEMBLY__ */
/* Thread information allocation. */
@@ -81,6 +84,9 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define TS_UAC_NOFIX 0x0002 /* ! flags as they match */
#define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'osf_sysinfo' */
+#define TS_SAVED_FP 0x0008
+#define TS_RESTORE_FP 0x0010
+
#define SET_UNALIGN_CTL(task,value) ({ \
__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
if (value & PR_UNALIGN_NOPRINT) \
@@ -104,5 +110,17 @@ register struct thread_info *__current_thread_info __asm__("$8");
put_user(res, (int __user *)(value)); \
})
+#ifndef __ASSEMBLY__
+extern void __save_fpu(void);
+
+static inline void save_fpu(void)
+{
+ if (!(current_thread_info()->status & TS_SAVED_FP)) {
+ current_thread_info()->status |= TS_SAVED_FP;
+ __save_fpu();
+ }
+}
+#endif
+
#endif /* __KERNEL__ */
#endif /* _ALPHA_THREAD_INFO_H */
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h
index 986f5da9b7d8..caabd92ea709 100644
--- a/arch/alpha/include/asm/unistd.h
+++ b/arch/alpha/include/asm/unistd.h
@@ -4,7 +4,7 @@
#include <uapi/asm/unistd.h>
-#define NR_SYSCALLS __NR_syscalls
+#define NR_syscalls __NR_syscalls
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_OLD_READDIR
diff --git a/arch/alpha/include/uapi/asm/ptrace.h b/arch/alpha/include/uapi/asm/ptrace.h
index c29194181025..5ca45934fcbb 100644
--- a/arch/alpha/include/uapi/asm/ptrace.h
+++ b/arch/alpha/include/uapi/asm/ptrace.h
@@ -64,7 +64,9 @@ struct switch_stack {
unsigned long r14;
unsigned long r15;
unsigned long r26;
+#ifndef __KERNEL__
unsigned long fp[32]; /* fp[31] is fpcr */
+#endif
};
diff --git a/arch/alpha/kernel/asm-offsets.c b/arch/alpha/kernel/asm-offsets.c
index 2e125e5c1508..b121294bee26 100644
--- a/arch/alpha/kernel/asm-offsets.c
+++ b/arch/alpha/kernel/asm-offsets.c
@@ -17,6 +17,8 @@ void foo(void)
DEFINE(TI_TASK, offsetof(struct thread_info, task));
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
+ DEFINE(TI_FP, offsetof(struct thread_info, fp));
+ DEFINE(TI_STATUS, offsetof(struct thread_info, status));
BLANK();
DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
diff --git a/arch/alpha/kernel/core_cia.c b/arch/alpha/kernel/core_cia.c
index f489170201c3..12926e9538b8 100644
--- a/arch/alpha/kernel/core_cia.c
+++ b/arch/alpha/kernel/core_cia.c
@@ -527,7 +527,7 @@ verify_tb_operation(void)
if (use_tbia_try2) {
alpha_mv.mv_pci_tbi = cia_pci_tbi_try2;
- /* Tags 0-3 must be disabled if we use this workaraund. */
+ /* Tags 0-3 must be disabled if we use this workaround. */
wmb();
*(vip)CIA_IOC_TB_TAGn(0) = 2;
*(vip)CIA_IOC_TB_TAGn(1) = 2;
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index a6207c47f089..eb51f93a70c8 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -17,7 +17,7 @@
/* Stack offsets. */
#define SP_OFF 184
-#define SWITCH_STACK_SIZE 320
+#define SWITCH_STACK_SIZE 64
.macro CFI_START_OSF_FRAME func
.align 4
@@ -159,7 +159,6 @@
.cfi_rel_offset $13, 32
.cfi_rel_offset $14, 40
.cfi_rel_offset $15, 48
- /* We don't really care about the FP registers for debugging. */
.endm
.macro UNDO_SWITCH_STACK
@@ -454,7 +453,7 @@ entSys:
SAVE_ALL
lda $8, 0x3fff
bic $sp, $8, $8
- lda $4, NR_SYSCALLS($31)
+ lda $4, NR_syscalls($31)
stq $16, SP_OFF+24($sp)
lda $5, sys_call_table
lda $27, sys_ni_syscall
@@ -498,6 +497,10 @@ ret_to_user:
and $17, _TIF_WORK_MASK, $2
bne $2, work_pending
restore_all:
+ ldl $2, TI_STATUS($8)
+ and $2, TS_SAVED_FP | TS_RESTORE_FP, $3
+ bne $3, restore_fpu
+restore_other:
.cfi_remember_state
RESTORE_ALL
call_pal PAL_rti
@@ -506,7 +509,7 @@ ret_to_kernel:
.cfi_restore_state
lda $16, 7
call_pal PAL_swpipl
- br restore_all
+ br restore_other
.align 3
$syscall_error:
@@ -570,6 +573,14 @@ $work_notifysig:
.type strace, @function
strace:
/* set up signal stack, call syscall_trace */
+ // NB: if anyone adds preemption, this block will need to be protected
+ ldl $1, TI_STATUS($8)
+ and $1, TS_SAVED_FP, $3
+ or $1, TS_SAVED_FP, $2
+ bne $3, 1f
+ stl $2, TI_STATUS($8)
+ bsr $26, __save_fpu
+1:
DO_SWITCH_STACK
jsr $26, syscall_trace_enter /* returns the syscall number */
UNDO_SWITCH_STACK
@@ -583,7 +594,7 @@ strace:
ldq $21, 88($sp)
/* get the system call pointer.. */
- lda $1, NR_SYSCALLS($31)
+ lda $1, NR_syscalls($31)
lda $2, sys_call_table
lda $27, sys_ni_syscall
cmpult $0, $1, $1
@@ -649,40 +660,6 @@ do_switch_stack:
stq $14, 40($sp)
stq $15, 48($sp)
stq $26, 56($sp)
- stt $f0, 64($sp)
- stt $f1, 72($sp)
- stt $f2, 80($sp)
- stt $f3, 88($sp)
- stt $f4, 96($sp)
- stt $f5, 104($sp)
- stt $f6, 112($sp)
- stt $f7, 120($sp)
- stt $f8, 128($sp)
- stt $f9, 136($sp)
- stt $f10, 144($sp)
- stt $f11, 152($sp)
- stt $f12, 160($sp)
- stt $f13, 168($sp)
- stt $f14, 176($sp)
- stt $f15, 184($sp)
- stt $f16, 192($sp)
- stt $f17, 200($sp)
- stt $f18, 208($sp)
- stt $f19, 216($sp)
- stt $f20, 224($sp)
- stt $f21, 232($sp)
- stt $f22, 240($sp)
- stt $f23, 248($sp)
- stt $f24, 256($sp)
- stt $f25, 264($sp)
- stt $f26, 272($sp)
- stt $f27, 280($sp)
- mf_fpcr $f0 # get fpcr
- stt $f28, 288($sp)
- stt $f29, 296($sp)
- stt $f30, 304($sp)
- stt $f0, 312($sp) # save fpcr in slot of $f31
- ldt $f0, 64($sp) # dont let "do_switch_stack" change fp state.
ret $31, ($1), 1
.cfi_endproc
.size do_switch_stack, .-do_switch_stack
@@ -701,54 +678,71 @@ undo_switch_stack:
ldq $14, 40($sp)
ldq $15, 48($sp)
ldq $26, 56($sp)
- ldt $f30, 312($sp) # get saved fpcr
- ldt $f0, 64($sp)
- ldt $f1, 72($sp)
- ldt $f2, 80($sp)
- ldt $f3, 88($sp)
- mt_fpcr $f30 # install saved fpcr
- ldt $f4, 96($sp)
- ldt $f5, 104($sp)
- ldt $f6, 112($sp)
- ldt $f7, 120($sp)
- ldt $f8, 128($sp)
- ldt $f9, 136($sp)
- ldt $f10, 144($sp)
- ldt $f11, 152($sp)
- ldt $f12, 160($sp)
- ldt $f13, 168($sp)
- ldt $f14, 176($sp)
- ldt $f15, 184($sp)
- ldt $f16, 192($sp)
- ldt $f17, 200($sp)
- ldt $f18, 208($sp)
- ldt $f19, 216($sp)
- ldt $f20, 224($sp)
- ldt $f21, 232($sp)
- ldt $f22, 240($sp)
- ldt $f23, 248($sp)
- ldt $f24, 256($sp)
- ldt $f25, 264($sp)
- ldt $f26, 272($sp)
- ldt $f27, 280($sp)
- ldt $f28, 288($sp)
- ldt $f29, 296($sp)
- ldt $f30, 304($sp)
lda $sp, SWITCH_STACK_SIZE($sp)
ret $31, ($1), 1
.cfi_endproc
.size undo_switch_stack, .-undo_switch_stack
+
+#define FR(n) n * 8 + TI_FP($8)
+ .align 4
+ .globl __save_fpu
+ .type __save_fpu, @function
+__save_fpu:
+#define V(n) stt $f##n, FR(n)
+ V( 0); V( 1); V( 2); V( 3)
+ V( 4); V( 5); V( 6); V( 7)
+ V( 8); V( 9); V(10); V(11)
+ V(12); V(13); V(14); V(15)
+ V(16); V(17); V(18); V(19)
+ V(20); V(21); V(22); V(23)
+ V(24); V(25); V(26); V(27)
+ mf_fpcr $f0 # get fpcr
+ V(28); V(29); V(30)
+ stt $f0, FR(31) # save fpcr in slot of $f31
+ ldt $f0, FR(0) # don't let "__save_fpu" change fp state.
+ ret
+#undef V
+ .size __save_fpu, .-__save_fpu
+
+ .align 4
+restore_fpu:
+ and $3, TS_RESTORE_FP, $3
+ bic $2, TS_SAVED_FP | TS_RESTORE_FP, $2
+ beq $3, 1f
+#define V(n) ldt $f##n, FR(n)
+ ldt $f30, FR(31) # get saved fpcr
+ V( 0); V( 1); V( 2); V( 3)
+ mt_fpcr $f30 # install saved fpcr
+ V( 4); V( 5); V( 6); V( 7)
+ V( 8); V( 9); V(10); V(11)
+ V(12); V(13); V(14); V(15)
+ V(16); V(17); V(18); V(19)
+ V(20); V(21); V(22); V(23)
+ V(24); V(25); V(26); V(27)
+ V(28); V(29); V(30)
+1: stl $2, TI_STATUS($8)
+ br restore_other
+#undef V
+
/*
* The meat of the context switch code.
*/
-
.align 4
.globl alpha_switch_to
.type alpha_switch_to, @function
.cfi_startproc
alpha_switch_to:
DO_SWITCH_STACK
+ ldl $1, TI_STATUS($8)
+ and $1, TS_RESTORE_FP, $3
+ bne $3, 1f
+ or $1, TS_RESTORE_FP | TS_SAVED_FP, $2
+ and $1, TS_SAVED_FP, $3
+ stl $2, TI_STATUS($8)
+ bne $3, 1f
+ bsr $26, __save_fpu
+1:
call_pal PAL_swpctx
lda $8, 0x3fff
UNDO_SWITCH_STACK
@@ -799,6 +793,14 @@ ret_from_kernel_thread:
alpha_\name:
.prologue 0
bsr $1, do_switch_stack
+ // NB: if anyone adds preemption, this block will need to be protected
+ ldl $1, TI_STATUS($8)
+ and $1, TS_SAVED_FP, $3
+ or $1, TS_SAVED_FP, $2
+ bne $3, 1f
+ stl $2, TI_STATUS($8)
+ bsr $26, __save_fpu
+1:
jsr $26, sys_\name
ldq $26, 56($sp)
lda $sp, SWITCH_STACK_SIZE($sp)
diff --git a/arch/alpha/kernel/module.c b/arch/alpha/kernel/module.c
index 5b60c248de9e..cbefa5a77384 100644
--- a/arch/alpha/kernel/module.c
+++ b/arch/alpha/kernel/module.c
@@ -146,10 +146,8 @@ apply_relocate_add(Elf64_Shdr *sechdrs, const char *strtab,
base = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr;
symtab = (Elf64_Sym *)sechdrs[symindex].sh_addr;
- /* The small sections were sorted to the end of the segment.
- The following should definitely cover them. */
- gp = (u64)me->core_layout.base + me->core_layout.size - 0x8000;
got = sechdrs[me->arch.gotsecindex].sh_addr;
+ gp = got + 0x8000;
for (i = 0; i < n; i++) {
unsigned long r_sym = ELF64_R_SYM (rela[i].r_info);
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index c54469b369cb..2a9a877a0508 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -522,7 +522,7 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
break;
default:
retval = -EINVAL;
- printk("osf_mount(%ld, %x)\n", typenr, flag);
+ printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag);
}
return retval;
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index e83a02ed5267..c81183935e97 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -127,10 +127,12 @@ again:
goto again;
}
- if (ptes[p+i])
- p = ALIGN(p + i + 1, mask + 1), i = 0;
- else
+ if (ptes[p+i]) {
+ p = ALIGN(p + i + 1, mask + 1);
+ i = 0;
+ } else {
i = i + 1;
+ }
}
if (i < n) {
diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index efcf7321701b..ccdb508c1516 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -689,8 +689,6 @@ static int __hw_perf_event_init(struct perf_event *event)
*/
static int alpha_pmu_event_init(struct perf_event *event)
{
- int err;
-
/* does not support taken branch sampling */
if (has_branch_stack(event))
return -EOPNOTSUPP;
@@ -709,9 +707,7 @@ static int alpha_pmu_event_init(struct perf_event *event)
return -ENODEV;
/* Do the real initialisation work. */
- err = __hw_perf_event_init(event);
-
- return err;
+ return __hw_perf_event_init(event);
}
/*
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 0eddd22c6212..e9cf7193eb81 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -133,7 +133,7 @@ common_shutdown_1(void *generic_ptr)
#ifdef CONFIG_DUMMY_CONSOLE
/* If we've gotten here after SysRq-b, leave interrupt
context before taking over the console. */
- if (in_irq())
+ if (in_hardirq())
irq_exit();
/* This has the effect of resetting the VGA video origin. */
console_lock();
@@ -243,6 +243,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
childstack = ((struct switch_stack *) childregs) - 1;
childti->pcb.ksp = (unsigned long) childstack;
childti->pcb.flags = 1; /* set FEN, clear everything else */
+ childti->status |= TS_SAVED_FP | TS_RESTORE_FP;
if (unlikely(args->fn)) {
/* kernel thread */
@@ -252,6 +253,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
childstack->r9 = (unsigned long) args->fn;
childstack->r10 = (unsigned long) args->fn_arg;
childregs->hae = alpha_mv.hae_cache;
+ memset(childti->fp, '\0', sizeof(childti->fp));
childti->pcb.usp = 0;
return 0;
}
@@ -334,8 +336,7 @@ EXPORT_SYMBOL(dump_elf_task);
int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
- struct switch_stack *sw = (struct switch_stack *)task_pt_regs(t) - 1;
- memcpy(fpu, sw->fp, 32 * 8);
+ memcpy(fpu, task_thread_info(t)->fp, 32 * 8);
return 1;
}
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index a1a239ea002d..fde4c68e7a0b 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -78,6 +78,8 @@ enum {
(PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
+ offsetof(struct switch_stack, reg))
+#define FP_REG(reg) (offsetof(struct thread_info, reg))
+
static int regoff[] = {
PT_REG( r0), PT_REG( r1), PT_REG( r2), PT_REG( r3),
PT_REG( r4), PT_REG( r5), PT_REG( r6), PT_REG( r7),
@@ -87,14 +89,14 @@ static int regoff[] = {
PT_REG( r20), PT_REG( r21), PT_REG( r22), PT_REG( r23),
PT_REG( r24), PT_REG( r25), PT_REG( r26), PT_REG( r27),
PT_REG( r28), PT_REG( gp), -1, -1,
- SW_REG(fp[ 0]), SW_REG(fp[ 1]), SW_REG(fp[ 2]), SW_REG(fp[ 3]),
- SW_REG(fp[ 4]), SW_REG(fp[ 5]), SW_REG(fp[ 6]), SW_REG(fp[ 7]),
- SW_REG(fp[ 8]), SW_REG(fp[ 9]), SW_REG(fp[10]), SW_REG(fp[11]),
- SW_REG(fp[12]), SW_REG(fp[13]), SW_REG(fp[14]), SW_REG(fp[15]),
- SW_REG(fp[16]), SW_REG(fp[17]), SW_REG(fp[18]), SW_REG(fp[19]),
- SW_REG(fp[20]), SW_REG(fp[21]), SW_REG(fp[22]), SW_REG(fp[23]),
- SW_REG(fp[24]), SW_REG(fp[25]), SW_REG(fp[26]), SW_REG(fp[27]),
- SW_REG(fp[28]), SW_REG(fp[29]), SW_REG(fp[30]), SW_REG(fp[31]),
+ FP_REG(fp[ 0]), FP_REG(fp[ 1]), FP_REG(fp[ 2]), FP_REG(fp[ 3]),
+ FP_REG(fp[ 4]), FP_REG(fp[ 5]), FP_REG(fp[ 6]), FP_REG(fp[ 7]),
+ FP_REG(fp[ 8]), FP_REG(fp[ 9]), FP_REG(fp[10]), FP_REG(fp[11]),
+ FP_REG(fp[12]), FP_REG(fp[13]), FP_REG(fp[14]), FP_REG(fp[15]),
+ FP_REG(fp[16]), FP_REG(fp[17]), FP_REG(fp[18]), FP_REG(fp[19]),
+ FP_REG(fp[20]), FP_REG(fp[21]), FP_REG(fp[22]), FP_REG(fp[23]),
+ FP_REG(fp[24]), FP_REG(fp[25]), FP_REG(fp[26]), FP_REG(fp[27]),
+ FP_REG(fp[28]), FP_REG(fp[29]), FP_REG(fp[30]), FP_REG(fp[31]),
PT_REG( pc)
};
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 6f47f256fe80..e62d1d461b1f 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -150,9 +150,10 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
{
unsigned long usp;
struct switch_stack *sw = (struct switch_stack *)regs - 1;
- long i, err = __get_user(regs->pc, &sc->sc_pc);
+ long err = __get_user(regs->pc, &sc->sc_pc);
current->restart_block.fn = do_no_restart_syscall;
+ current_thread_info()->status |= TS_SAVED_FP | TS_RESTORE_FP;
sw->r26 = (unsigned long) ret_from_sys_call;
@@ -189,9 +190,9 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
err |= __get_user(usp, sc->sc_regs+30);
wrusp(usp);
- for (i = 0; i < 31; i++)
- err |= __get_user(sw->fp[i], sc->sc_fpregs+i);
- err |= __get_user(sw->fp[31], &sc->sc_fpcr);
+ err |= __copy_from_user(current_thread_info()->fp,
+ sc->sc_fpregs, 31 * 8);
+ err |= __get_user(current_thread_info()->fp[31], &sc->sc_fpcr);
return err;
}
@@ -272,7 +273,7 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
unsigned long mask, unsigned long sp)
{
struct switch_stack *sw = (struct switch_stack *)regs - 1;
- long i, err = 0;
+ long err = 0;
err |= __put_user(on_sig_stack((unsigned long)sc), &sc->sc_onstack);
err |= __put_user(mask, &sc->sc_mask);
@@ -312,10 +313,10 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
err |= __put_user(sp, sc->sc_regs+30);
err |= __put_user(0, sc->sc_regs+31);
- for (i = 0; i < 31; i++)
- err |= __put_user(sw->fp[i], sc->sc_fpregs+i);
+ err |= __copy_to_user(sc->sc_fpregs,
+ current_thread_info()->fp, 31 * 8);
err |= __put_user(0, sc->sc_fpregs+31);
- err |= __put_user(sw->fp[31], &sc->sc_fpcr);
+ err |= __put_user(current_thread_info()->fp[31], &sc->sc_fpcr);
err |= __put_user(regs->trap_a0, &sc->sc_traparg_a0);
err |= __put_user(regs->trap_a1, &sc->sc_traparg_a1);
@@ -528,6 +529,9 @@ do_work_pending(struct pt_regs *regs, unsigned long thread_flags,
} else {
local_irq_enable();
if (thread_flags & (_TIF_SIGPENDING|_TIF_NOTIFY_SIGNAL)) {
+ preempt_disable();
+ save_fpu();
+ preempt_enable();
do_signal(regs, r0, r19);
r0 = 0;
} else {
diff --git a/arch/alpha/lib/fpreg.c b/arch/alpha/lib/fpreg.c
index 34fea465645b..612c5eca71bc 100644
--- a/arch/alpha/lib/fpreg.c
+++ b/arch/alpha/lib/fpreg.c
@@ -7,6 +7,8 @@
#include <linux/compiler.h>
#include <linux/export.h>
+#include <linux/preempt.h>
+#include <asm/thread_info.h>
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
#define STT(reg,val) asm volatile ("ftoit $f"#reg",%0" : "=r"(val));
@@ -19,7 +21,12 @@ alpha_read_fp_reg (unsigned long reg)
{
unsigned long val;
- switch (reg) {
+ if (unlikely(reg >= 32))
+ return 0;
+ preempt_enable();
+ if (current_thread_info()->status & TS_SAVED_FP)
+ val = current_thread_info()->fp[reg];
+ else switch (reg) {
case 0: STT( 0, val); break;
case 1: STT( 1, val); break;
case 2: STT( 2, val); break;
@@ -52,8 +59,8 @@ alpha_read_fp_reg (unsigned long reg)
case 29: STT(29, val); break;
case 30: STT(30, val); break;
case 31: STT(31, val); break;
- default: return 0;
}
+ preempt_enable();
return val;
}
EXPORT_SYMBOL(alpha_read_fp_reg);
@@ -67,7 +74,14 @@ EXPORT_SYMBOL(alpha_read_fp_reg);
void
alpha_write_fp_reg (unsigned long reg, unsigned long val)
{
- switch (reg) {
+ if (unlikely(reg >= 32))
+ return;
+
+ preempt_disable();
+ if (current_thread_info()->status & TS_SAVED_FP) {
+ current_thread_info()->status |= TS_RESTORE_FP;
+ current_thread_info()->fp[reg] = val;
+ } else switch (reg) {
case 0: LDT( 0, val); break;
case 1: LDT( 1, val); break;
case 2: LDT( 2, val); break;
@@ -101,6 +115,7 @@ alpha_write_fp_reg (unsigned long reg, unsigned long val)
case 30: LDT(30, val); break;
case 31: LDT(31, val); break;
}
+ preempt_enable();
}
EXPORT_SYMBOL(alpha_write_fp_reg);
@@ -115,7 +130,14 @@ alpha_read_fp_reg_s (unsigned long reg)
{
unsigned long val;
- switch (reg) {
+ if (unlikely(reg >= 32))
+ return 0;
+
+ preempt_enable();
+ if (current_thread_info()->status & TS_SAVED_FP) {
+ LDT(0, current_thread_info()->fp[reg]);
+ STS(0, val);
+ } else switch (reg) {
case 0: STS( 0, val); break;
case 1: STS( 1, val); break;
case 2: STS( 2, val); break;
@@ -148,8 +170,8 @@ alpha_read_fp_reg_s (unsigned long reg)
case 29: STS(29, val); break;
case 30: STS(30, val); break;
case 31: STS(31, val); break;
- default: return 0;
}
+ preempt_enable();
return val;
}
EXPORT_SYMBOL(alpha_read_fp_reg_s);
@@ -163,7 +185,15 @@ EXPORT_SYMBOL(alpha_read_fp_reg_s);
void
alpha_write_fp_reg_s (unsigned long reg, unsigned long val)
{
- switch (reg) {
+ if (unlikely(reg >= 32))
+ return;
+
+ preempt_disable();
+ if (current_thread_info()->status & TS_SAVED_FP) {
+ current_thread_info()->status |= TS_RESTORE_FP;
+ LDS(0, val);
+ STT(0, current_thread_info()->fp[reg]);
+ } else switch (reg) {
case 0: LDS( 0, val); break;
case 1: LDS( 1, val); break;
case 2: LDS( 2, val); break;
@@ -197,5 +227,6 @@ alpha_write_fp_reg_s (unsigned long reg, unsigned long val)
case 30: LDS(30, val); break;
case 31: LDS(31, val); break;
}
+ preempt_enable();
}
EXPORT_SYMBOL(alpha_write_fp_reg_s);
diff --git a/arch/alpha/lib/stacktrace.c b/arch/alpha/lib/stacktrace.c
index 62454a7810e2..2b1176dd5174 100644
--- a/arch/alpha/lib/stacktrace.c
+++ b/arch/alpha/lib/stacktrace.c
@@ -92,7 +92,7 @@ stacktrace(void)
{
instr * ret_pc;
instr * prologue = (instr *)stacktrace;
- register unsigned char * sp __asm__ ("$30");
+ unsigned char *sp = (unsigned char *)current_stack_pointer;
printk("\tstack trace:\n");
do {
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index f3aae2be1d53..616e1aa1c4da 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -25,7 +25,7 @@
#include "pid_list.h"
#ifdef CONFIG_FTRACE_SYSCALLS
-#include <asm/unistd.h> /* For NR_SYSCALLS */
+#include <asm/unistd.h> /* For NR_syscalls */
#include <asm/syscall.h> /* some archs define it here */
#endif