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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

Browse source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  xen: fix UP setup of shared_info
  xen: fix RMW when unmasking events
  x86, documentation: nmi_watchdog=2 works on x86_64
  x86: stricter check in follow_huge_addr()
  rdc321x: GPIO routines bugfixes
  x86: ptrace.c: fix defined-but-unused warnings
  x86: fix prefetch workaround
This commit is contained in:
Linus Torvalds 2008-03-27 13:20:47 -07:00
commit fb8c7fb25d
10 changed files with 292 additions and 169 deletions
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3
Documentation/nmi_watchdog.txt
View file

@ -23,8 +23,7 @@ kernel debugging options, such as Kernel Stack Meter or Kernel Tracer,
may implicitly disable the NMI watchdog.]
For x86-64, the needed APIC is always compiled in, and the NMI watchdog is
always enabled with I/O-APIC mode (nmi_watchdog=1). Currently, local APIC
mode (nmi_watchdog=2) does not work on x86-64.
always enabled with I/O-APIC mode (nmi_watchdog=1).
Using local APIC (nmi_watchdog=2) needs the first performance register, so
you can't use it for other purposes (such as high precision performance

169
arch/x86/kernel/ptrace.c
View file

@ -600,21 +600,6 @@ static int ptrace_bts_read_record(struct task_struct *child,
return sizeof(ret);
}
static int ptrace_bts_write_record(struct task_struct *child,
const struct bts_struct *in)
{
int retval;
if (!child->thread.ds_area_msr)
return -ENXIO;
retval = ds_write_bts((void *)child->thread.ds_area_msr, in);
if (retval)
return retval;
return sizeof(*in);
}
static int ptrace_bts_clear(struct task_struct *child)
{
if (!child->thread.ds_area_msr)
@ -657,75 +642,6 @@ static int ptrace_bts_drain(struct task_struct *child,
return end;
}
static int ptrace_bts_realloc(struct task_struct *child,
int size, int reduce_size)
{
unsigned long rlim, vm;
int ret, old_size;
if (size < 0)
return -EINVAL;
old_size = ds_get_bts_size((void *)child->thread.ds_area_msr);
if (old_size < 0)
return old_size;
ret = ds_free((void **)&child->thread.ds_area_msr);
if (ret < 0)
goto out;
size >>= PAGE_SHIFT;
old_size >>= PAGE_SHIFT;
current->mm->total_vm -= old_size;
current->mm->locked_vm -= old_size;
if (size == 0)
goto out;
rlim = current->signal->rlim[RLIMIT_AS].rlim_cur >> PAGE_SHIFT;
vm = current->mm->total_vm + size;
if (rlim < vm) {
ret = -ENOMEM;
if (!reduce_size)
goto out;
size = rlim - current->mm->total_vm;
if (size <= 0)
goto out;
}
rlim = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >> PAGE_SHIFT;
vm = current->mm->locked_vm + size;
if (rlim < vm) {
ret = -ENOMEM;
if (!reduce_size)
goto out;
size = rlim - current->mm->locked_vm;
if (size <= 0)
goto out;
}
ret = ds_allocate((void **)&child->thread.ds_area_msr,
size << PAGE_SHIFT);
if (ret < 0)
goto out;
current->mm->total_vm += size;
current->mm->locked_vm += size;
out:
if (child->thread.ds_area_msr)
set_tsk_thread_flag(child, TIF_DS_AREA_MSR);
else
clear_tsk_thread_flag(child, TIF_DS_AREA_MSR);
return ret;
}
static int ptrace_bts_config(struct task_struct *child,
long cfg_size,
const struct ptrace_bts_config __user *ucfg)
@ -828,6 +744,91 @@ static int ptrace_bts_status(struct task_struct *child,
return sizeof(cfg);
}
static int ptrace_bts_write_record(struct task_struct *child,
const struct bts_struct *in)
{
int retval;
if (!child->thread.ds_area_msr)
return -ENXIO;
retval = ds_write_bts((void *)child->thread.ds_area_msr, in);
if (retval)
return retval;
return sizeof(*in);
}
static int ptrace_bts_realloc(struct task_struct *child,
int size, int reduce_size)
{
unsigned long rlim, vm;
int ret, old_size;
if (size < 0)
return -EINVAL;
old_size = ds_get_bts_size((void *)child->thread.ds_area_msr);
if (old_size < 0)
return old_size;
ret = ds_free((void **)&child->thread.ds_area_msr);
if (ret < 0)
goto out;
size >>= PAGE_SHIFT;
old_size >>= PAGE_SHIFT;
current->mm->total_vm -= old_size;
current->mm->locked_vm -= old_size;
if (size == 0)
goto out;
rlim = current->signal->rlim[RLIMIT_AS].rlim_cur >> PAGE_SHIFT;
vm = current->mm->total_vm + size;
if (rlim < vm) {
ret = -ENOMEM;
if (!reduce_size)
goto out;
size = rlim - current->mm->total_vm;
if (size <= 0)
goto out;
}
rlim = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >> PAGE_SHIFT;
vm = current->mm->locked_vm + size;
if (rlim < vm) {
ret = -ENOMEM;
if (!reduce_size)
goto out;
size = rlim - current->mm->locked_vm;
if (size <= 0)
goto out;
}
ret = ds_allocate((void **)&child->thread.ds_area_msr,
size << PAGE_SHIFT);
if (ret < 0)
goto out;
current->mm->total_vm += size;
current->mm->locked_vm += size;
out:
if (child->thread.ds_area_msr)
set_tsk_thread_flag(child, TIF_DS_AREA_MSR);
else
clear_tsk_thread_flag(child, TIF_DS_AREA_MSR);
return ret;
}
void ptrace_bts_take_timestamp(struct task_struct *tsk,
enum bts_qualifier qualifier)
{

203
arch/x86/mach-rdc321x/gpio.c
View file

@ -1,91 +1,194 @@
/*
* Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
* RDC321x architecture specific GPIO support
* GPIO support for RDC SoC R3210/R8610
*
* Copyright (C) 2007, Florian Fainelli <florian@openwrt.org>
* Copyright (C) 2008, Volker Weiss <dev@tintuc.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/autoconf.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <asm/gpio.h>
#include <asm/mach-rdc321x/rdc321x_defs.h>
static inline int rdc_gpio_is_valid(unsigned gpio)
/* spin lock to protect our private copy of GPIO data register plus
the access to PCI conf registers. */
static DEFINE_SPINLOCK(gpio_lock);
/* copy of GPIO data registers */
static u32 gpio_data_reg1;
static u32 gpio_data_reg2;
static u32 gpio_request_data[2];
static inline void rdc321x_conf_write(unsigned addr, u32 value)
{
return (gpio <= RDC_MAX_GPIO);
outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
outl(value, RDC3210_CFGREG_DATA);
}
static unsigned int rdc_gpio_read(unsigned gpio)
static inline void rdc321x_conf_or(unsigned addr, u32 value)
{
unsigned int val;
val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x84:0x48));
outl(val, RDC3210_CFGREG_ADDR);
udelay(10);
val = inl(RDC3210_CFGREG_DATA);
val |= (0x1 << (gpio & 0x1F));
outl(val, RDC3210_CFGREG_DATA);
udelay(10);
val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x88:0x4C));
outl(val, RDC3210_CFGREG_ADDR);
udelay(10);
val = inl(RDC3210_CFGREG_DATA);
return val;
outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
value |= inl(RDC3210_CFGREG_DATA);
outl(value, RDC3210_CFGREG_DATA);
}
static void rdc_gpio_write(unsigned int val)
static inline u32 rdc321x_conf_read(unsigned addr)
{
if (val) {
outl(val, RDC3210_CFGREG_DATA);
udelay(10);
}
outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
return inl(RDC3210_CFGREG_DATA);
}
/* configure pin as GPIO */
static void rdc321x_configure_gpio(unsigned gpio)
{
unsigned long flags;
spin_lock_irqsave(&gpio_lock, flags);
rdc321x_conf_or(gpio < 32
? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2,
1 << (gpio & 0x1f));
spin_unlock_irqrestore(&gpio_lock, flags);
}
/* initially setup the 2 copies of the gpio data registers.
This function must be called by the platform setup code. */
void __init rdc321x_gpio_setup()
{
/* this might not be, what others (BIOS, bootloader, etc.)
wrote to these registers before, but it's a good guess. Still
better than just using 0xffffffff. */
gpio_data_reg1 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG1);
gpio_data_reg2 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG2);
}
/* determine, if gpio number is valid */
static inline int rdc321x_is_gpio(unsigned gpio)
{
return gpio <= RDC321X_MAX_GPIO;
}
/* request GPIO */
int rdc_gpio_request(unsigned gpio, const char *label)
{
unsigned long flags;
if (!rdc321x_is_gpio(gpio))
return -EINVAL;
spin_lock_irqsave(&gpio_lock, flags);
if (gpio_request_data[(gpio & 0x20) ? 1 : 0] & (1 << (gpio & 0x1f)))
goto inuse;
gpio_request_data[(gpio & 0x20) ? 1 : 0] |= (1 << (gpio & 0x1f));
spin_unlock_irqrestore(&gpio_lock, flags);
return 0;
inuse:
spin_unlock_irqrestore(&gpio_lock, flags);
return -EINVAL;
}
EXPORT_SYMBOL(rdc_gpio_request);
/* release previously-claimed GPIO */
void rdc_gpio_free(unsigned gpio)
{
unsigned long flags;
if (!rdc321x_is_gpio(gpio))
return;
spin_lock_irqsave(&gpio_lock, flags);
gpio_request_data[(gpio & 0x20) ? 1 : 0] &= ~(1 << (gpio & 0x1f));
spin_unlock_irqrestore(&gpio_lock, flags);
}
EXPORT_SYMBOL(rdc_gpio_free);
/* read GPIO pin */
int rdc_gpio_get_value(unsigned gpio)
{
if (rdc_gpio_is_valid(gpio))
return (int)rdc_gpio_read(gpio);
else
return -EINVAL;
u32 reg;
unsigned long flags;
spin_lock_irqsave(&gpio_lock, flags);
reg = rdc321x_conf_read(gpio < 32
? RDC321X_GPIO_DATA_REG1 : RDC321X_GPIO_DATA_REG2);
spin_unlock_irqrestore(&gpio_lock, flags);
return (1 << (gpio & 0x1f)) & reg ? 1 : 0;
}
EXPORT_SYMBOL(rdc_gpio_get_value);
/* set GPIO pin to value */
void rdc_gpio_set_value(unsigned gpio, int value)
{
unsigned int val;
unsigned long flags;
u32 reg;
if (!rdc_gpio_is_valid(gpio))
return;
val = rdc_gpio_read(gpio);
if (value)
val &= ~(0x1 << (gpio & 0x1F));
else
val |= (0x1 << (gpio & 0x1F));
rdc_gpio_write(val);
reg = 1 << (gpio & 0x1f);
if (gpio < 32) {
spin_lock_irqsave(&gpio_lock, flags);
if (value)
gpio_data_reg1 |= reg;
else
gpio_data_reg1 &= ~reg;
rdc321x_conf_write(RDC321X_GPIO_DATA_REG1, gpio_data_reg1);
spin_unlock_irqrestore(&gpio_lock, flags);
} else {
spin_lock_irqsave(&gpio_lock, flags);
if (value)
gpio_data_reg2 |= reg;
else
gpio_data_reg2 &= ~reg;
rdc321x_conf_write(RDC321X_GPIO_DATA_REG2, gpio_data_reg2);
spin_unlock_irqrestore(&gpio_lock, flags);
}
}
EXPORT_SYMBOL(rdc_gpio_set_value);
/* configure GPIO pin as input */
int rdc_gpio_direction_input(unsigned gpio)
{
if (!rdc321x_is_gpio(gpio))
return -EINVAL;
rdc321x_configure_gpio(gpio);
return 0;
}
EXPORT_SYMBOL(rdc_gpio_direction_input);
/* configure GPIO pin as output and set value */
int rdc_gpio_direction_output(unsigned gpio, int value)
{
if (!rdc321x_is_gpio(gpio))
return -EINVAL;
gpio_set_value(gpio, value);
rdc321x_configure_gpio(gpio);
return 0;
}
EXPORT_SYMBOL(rdc_gpio_direction_output);

2
arch/x86/mach-rdc321x/platform.c
View file

@ -62,6 +62,8 @@ static struct platform_device *rdc321x_devs[] = {
static int __init rdc_board_setup(void)
{
rdc321x_gpio_setup();
return platform_add_devices(rdc321x_devs, ARRAY_SIZE(rdc321x_devs));
}

3
arch/x86/mm/fault.c
View file

@ -92,7 +92,8 @@ static int is_prefetch(struct pt_regs *regs, unsigned long addr,
unsigned char *max_instr;
#ifdef CONFIG_X86_32
if (!(__supported_pte_mask & _PAGE_NX))
/* Catch an obscure case of prefetch inside an NX page: */
if ((__supported_pte_mask & _PAGE_NX) && (error_code & 16))
return 0;
#endif

2
arch/x86/mm/hugetlbpage.c
View file

@ -178,7 +178,7 @@ follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
page = &pte_page(*pte)[vpfn % (HPAGE_SIZE/PAGE_SIZE)];
WARN_ON(!PageCompound(page));
WARN_ON(!PageHead(page));
return page;
}

53
arch/x86/xen/enlighten.c
View file

@ -95,7 +95,7 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&dummy_shared_info;
*
* 0: not available, 1: available
*/
static int have_vcpu_info_placement = 0;
static int have_vcpu_info_placement = 1;
static void __init xen_vcpu_setup(int cpu)
{
@ -103,6 +103,7 @@ static void __init xen_vcpu_setup(int cpu)
int err;
struct vcpu_info *vcpup;
BUG_ON(HYPERVISOR_shared_info == &dummy_shared_info);
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
if (!have_vcpu_info_placement)
@ -805,6 +806,31 @@ static __init void xen_pagetable_setup_start(pgd_t *base)
PFN_DOWN(__pa(xen_start_info->pt_base)));
}
static __init void setup_shared_info(void)
{
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
unsigned long addr = fix_to_virt(FIX_PARAVIRT_BOOTMAP);
/*
* Create a mapping for the shared info page.
* Should be set_fixmap(), but shared_info is a machine
* address with no corresponding pseudo-phys address.
*/
set_pte_mfn(addr,
PFN_DOWN(xen_start_info->shared_info),
PAGE_KERNEL);
HYPERVISOR_shared_info = (struct shared_info *)addr;
} else
HYPERVISOR_shared_info =
(struct shared_info *)__va(xen_start_info->shared_info);
#ifndef CONFIG_SMP
/* In UP this is as good a place as any to set up shared info */
xen_setup_vcpu_info_placement();
#endif
}
static __init void xen_pagetable_setup_done(pgd_t *base)
{
/* This will work as long as patching hasn't happened yet
@ -815,22 +841,7 @@ static __init void xen_pagetable_setup_done(pgd_t *base)
pv_mmu_ops.release_pd = xen_release_pt;
pv_mmu_ops.set_pte = xen_set_pte;
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
/*
* Create a mapping for the shared info page.
* Should be set_fixmap(), but shared_info is a machine
* address with no corresponding pseudo-phys address.
*/
set_pte_mfn(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
PFN_DOWN(xen_start_info->shared_info),
PAGE_KERNEL);
HYPERVISOR_shared_info =
(struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
} else
HYPERVISOR_shared_info =
(struct shared_info *)__va(xen_start_info->shared_info);
setup_shared_info();
/* Actually pin the pagetable down, but we can't set PG_pinned
yet because the page structures don't exist yet. */
@ -1182,15 +1193,9 @@ asmlinkage void __init xen_start_kernel(void)
x86_write_percpu(xen_cr3, __pa(pgd));
x86_write_percpu(xen_current_cr3, __pa(pgd));
#ifdef CONFIG_SMP
/* Don't do the full vcpu_info placement stuff until we have a
possible map. */
possible map and a non-dummy shared_info. */
per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
#else
/* May as well do it now, since there's no good time to call
it later on UP. */
xen_setup_vcpu_info_placement();
#endif
pv_info.kernel_rpl = 1;
if (xen_feature(XENFEAT_supervisor_mode_kernel))

9
arch/x86/xen/xen-asm.S
View file

@ -33,12 +33,17 @@
events, then enter the hypervisor to get them handled.
*/
ENTRY(xen_irq_enable_direct)
/* Clear mask and test pending */
andw $0x00ff, PER_CPU_VAR(xen_vcpu_info)+XEN_vcpu_info_pending
/* Unmask events */
movb $0, PER_CPU_VAR(xen_vcpu_info)+XEN_vcpu_info_mask
/* Preempt here doesn't matter because that will deal with
any pending interrupts. The pending check may end up being
run on the wrong CPU, but that doesn't hurt. */
/* Test for pending */
testb $0xff, PER_CPU_VAR(xen_vcpu_info)+XEN_vcpu_info_pending
jz 1f
2: call check_events
1:
ENDPATCH(xen_irq_enable_direct)

9
include/asm-x86/mach-rdc321x/gpio.h
View file

@ -5,19 +5,20 @@ extern int rdc_gpio_get_value(unsigned gpio);
extern void rdc_gpio_set_value(unsigned gpio, int value);
extern int rdc_gpio_direction_input(unsigned gpio);
extern int rdc_gpio_direction_output(unsigned gpio, int value);
extern int rdc_gpio_request(unsigned gpio, const char *label);
extern void rdc_gpio_free(unsigned gpio);
extern void __init rdc321x_gpio_setup(void);
/* Wrappers for the arch-neutral GPIO API */
static inline int gpio_request(unsigned gpio, const char *label)
{
/* Not yet implemented */
return 0;
return rdc_gpio_request(gpio, label);
}
static inline void gpio_free(unsigned gpio)
{
/* Not yet implemented */
rdc_gpio_free(gpio);
}
static inline int gpio_direction_input(unsigned gpio)

8
include/asm-x86/mach-rdc321x/rdc321x_defs.h
View file

@ -3,4 +3,10 @@
/* General purpose configuration and data registers */
#define RDC3210_CFGREG_ADDR 0x0CF8
#define RDC3210_CFGREG_DATA 0x0CFC
#define RDC_MAX_GPIO 0x3A
#define RDC321X_GPIO_CTRL_REG1 0x48
#define RDC321X_GPIO_CTRL_REG2 0x84
#define RDC321X_GPIO_DATA_REG1 0x4c
#define RDC321X_GPIO_DATA_REG2 0x88
#define RDC321X_MAX_GPIO 58