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qubes-linux-kernel/patches.xen/xen3-patch-2.6.18
Joanna Rutkowska d1298d1dfb Keeps patches unpacked for easier history browsing
2010-07-07 13:12:45 +02:00

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From: www.kernel.org
Subject: Linux 2.6.18
Patch-mainline: 2.6.18
Automatically created from "patches.kernel.org/patch-2.6.18" by xen-port-patches.py
Acked-by: jbeulich@novell.com
--- head-2010-04-29.orig/arch/x86/Kconfig 2010-03-24 15:02:14.000000000 +0100
+++ head-2010-04-29/arch/x86/Kconfig 2010-03-24 15:06:08.000000000 +0100
@@ -70,7 +70,6 @@ config ARCH_DEFCONFIG
config GENERIC_TIME
def_bool y
- depends on !X86_XEN
config GENERIC_CMOS_UPDATE
def_bool y
@@ -1665,7 +1664,7 @@ config KEXEC_JUMP
code in physical address mode via KEXEC
config PHYSICAL_START
- hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
+ hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP || XEN)
default "0x1000000"
---help---
This gives the physical address where the kernel is loaded.
--- head-2010-04-29.orig/arch/x86/kernel/Makefile 2010-03-24 15:01:37.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/Makefile 2010-03-24 15:06:08.000000000 +0100
@@ -138,5 +138,5 @@ ifeq ($(CONFIG_X86_64),y)
pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
endif
-disabled-obj-$(CONFIG_XEN) := i8259_$(BITS).o reboot.o smpboot_$(BITS).o
+disabled-obj-$(CONFIG_XEN) := i8253.o i8259_$(BITS).o reboot.o smpboot_$(BITS).o tsc_$(BITS).o
%/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
--- head-2010-04-29.orig/arch/x86/kernel/setup64-xen.c 2008-01-28 12:24:19.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/setup64-xen.c 2010-03-24 15:06:08.000000000 +0100
@@ -363,5 +363,7 @@ void __cpuinit cpu_init (void)
fpu_init();
- raw_local_save_flags(kernel_eflags);
+ asm ("pushfq; popq %0" : "=rm" (kernel_eflags));
+ if (raw_irqs_disabled())
+ kernel_eflags &= ~X86_EFLAGS_IF;
}
--- head-2010-04-29.orig/arch/x86/kernel/time-xen.c 2010-02-24 11:50:47.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/time-xen.c 2010-03-24 15:06:08.000000000 +0100
@@ -45,7 +45,6 @@
#include <linux/sysdev.h>
#include <linux/bcd.h>
#include <linux/efi.h>
-#include <linux/mca.h>
#include <linux/sysctl.h>
#include <linux/percpu.h>
#include <linux/kernel_stat.h>
@@ -76,8 +75,13 @@
#if defined (__i386__)
#include <asm/i8259.h>
+#include <asm/i8253.h>
+DEFINE_SPINLOCK(i8253_lock);
+EXPORT_SYMBOL(i8253_lock);
#endif
+#define XEN_SHIFT 22
+
int pit_latch_buggy; /* extern */
#if defined(__x86_64__)
@@ -97,10 +101,6 @@ extern unsigned long wall_jiffies;
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL(rtc_lock);
-extern struct init_timer_opts timer_tsc_init;
-extern struct timer_opts timer_tsc;
-#define timer_none timer_tsc
-
/* These are peridically updated in shared_info, and then copied here. */
struct shadow_time_info {
u64 tsc_timestamp; /* TSC at last update of time vals. */
@@ -175,24 +175,6 @@ static int __init __permitted_clock_jitt
}
__setup("permitted_clock_jitter=", __permitted_clock_jitter);
-#if 0
-static void delay_tsc(unsigned long loops)
-{
- unsigned long bclock, now;
-
- rdtscl(bclock);
- do {
- rep_nop();
- rdtscl(now);
- } while ((now - bclock) < loops);
-}
-
-struct timer_opts timer_tsc = {
- .name = "tsc",
- .delay = delay_tsc,
-};
-#endif
-
/*
* Scale a 64-bit delta by scaling and multiplying by a 32-bit fraction,
* yielding a 64-bit result.
@@ -229,14 +211,6 @@ static inline u64 scale_delta(u64 delta,
return product;
}
-#if 0 /* defined (__i386__) */
-int read_current_timer(unsigned long *timer_val)
-{
- rdtscl(*timer_val);
- return 0;
-}
-#endif
-
void init_cpu_khz(void)
{
u64 __cpu_khz = 1000000ULL << 32;
@@ -256,6 +230,7 @@ static u64 get_nsec_offset(struct shadow
return scale_delta(delta, shadow->tsc_to_nsec_mul, shadow->tsc_shift);
}
+#ifdef CONFIG_X86_64
static unsigned long get_usec_offset(struct shadow_time_info *shadow)
{
u64 now, delta;
@@ -263,6 +238,7 @@ static unsigned long get_usec_offset(str
delta = now - shadow->tsc_timestamp;
return scale_delta(delta, shadow->tsc_to_usec_mul, shadow->tsc_shift);
}
+#endif
static void __update_wallclock(time_t sec, long nsec)
{
@@ -377,6 +353,8 @@ void rtc_cmos_write(unsigned char val, u
}
EXPORT_SYMBOL(rtc_cmos_write);
+#ifdef CONFIG_X86_64
+
/*
* This version of gettimeofday has microsecond resolution
* and better than microsecond precision on fast x86 machines with TSC.
@@ -515,6 +493,8 @@ int do_settimeofday(struct timespec *tv)
EXPORT_SYMBOL(do_settimeofday);
+#endif
+
static void sync_xen_wallclock(unsigned long dummy);
static DEFINE_TIMER(sync_xen_wallclock_timer, sync_xen_wallclock, 0, 0);
static void sync_xen_wallclock(unsigned long dummy)
@@ -566,11 +546,15 @@ static int set_rtc_mmss(unsigned long no
return retval;
}
+#ifdef CONFIG_X86_64
/* monotonic_clock(): returns # of nanoseconds passed since time_init()
* Note: This function is required to return accurate
* time even in the absence of multiple timer ticks.
*/
unsigned long long monotonic_clock(void)
+#else
+unsigned long long sched_clock(void)
+#endif
{
unsigned int cpu = get_cpu();
struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
@@ -590,9 +574,9 @@ unsigned long long monotonic_clock(void)
return time;
}
+#ifdef CONFIG_X86_64
EXPORT_SYMBOL(monotonic_clock);
-#ifdef __x86_64__
unsigned long long sched_clock(void)
{
return monotonic_clock();
@@ -762,6 +746,89 @@ irqreturn_t timer_interrupt(int irq, voi
return IRQ_HANDLED;
}
+#ifndef CONFIG_X86_64
+
+void tsc_init(void)
+{
+ init_cpu_khz();
+ printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
+ cpu_khz / 1000, cpu_khz % 1000);
+
+ use_tsc_delay();
+}
+
+#include <linux/clocksource.h>
+
+void mark_tsc_unstable(void)
+{
+#ifndef CONFIG_XEN /* XXX Should tell the hypervisor about this fact. */
+ tsc_unstable = 1;
+#endif
+}
+EXPORT_SYMBOL_GPL(mark_tsc_unstable);
+
+static cycle_t xen_clocksource_read(void)
+{
+#ifdef CONFIG_SMP
+ static cycle_t last_ret;
+#ifndef CONFIG_64BIT
+ cycle_t last = cmpxchg64(&last_ret, 0, 0);
+#else
+ cycle_t last = last_ret;
+#define cmpxchg64 cmpxchg
+#endif
+ cycle_t ret = sched_clock();
+
+ if (unlikely((s64)(ret - last) < 0)) {
+ if (last - ret > permitted_clock_jitter
+ && printk_ratelimit()) {
+ unsigned int cpu = get_cpu();
+ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
+
+ printk(KERN_WARNING "clocksource/%u: "
+ "Time went backwards: "
+ "ret=%Lx delta=%Ld shadow=%Lx offset=%Lx\n",
+ cpu, ret, ret - last, shadow->system_timestamp,
+ get_nsec_offset(shadow));
+ put_cpu();
+ }
+ return last;
+ }
+
+ for (;;) {
+ cycle_t cur = cmpxchg64(&last_ret, last, ret);
+
+ if (cur == last || (s64)(ret - cur) < 0)
+ return ret;
+ last = cur;
+ }
+#else
+ return sched_clock();
+#endif
+}
+
+static struct clocksource clocksource_xen = {
+ .name = "xen",
+ .rating = 400,
+ .read = xen_clocksource_read,
+ .mask = CLOCKSOURCE_MASK(64),
+ .mult = 1 << XEN_SHIFT, /* time directly in nanoseconds */
+ .shift = XEN_SHIFT,
+ .is_continuous = 1,
+};
+
+static int __init init_xen_clocksource(void)
+{
+ clocksource_xen.mult = clocksource_khz2mult(cpu_khz,
+ clocksource_xen.shift);
+
+ return clocksource_register(&clocksource_xen);
+}
+
+module_init(init_xen_clocksource);
+
+#endif
+
static void init_missing_ticks_accounting(unsigned int cpu)
{
struct vcpu_register_runstate_memory_area area;
@@ -908,7 +975,7 @@ static void setup_cpu0_timer_irq(void)
VIRQ_TIMER,
0,
timer_interrupt,
- SA_INTERRUPT,
+ IRQF_DISABLED|IRQF_TIMER,
"timer0",
NULL);
BUG_ON(per_cpu(timer_irq, 0) < 0);
@@ -950,11 +1017,11 @@ void __init time_init(void)
update_wallclock();
+#ifdef CONFIG_X86_64
init_cpu_khz();
printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
cpu_khz / 1000, cpu_khz % 1000);
-#if defined(__x86_64__)
vxtime.mode = VXTIME_TSC;
vxtime.quot = (1000000L << 32) / vxtime_hz;
vxtime.tsc_quot = (1000L << 32) / cpu_khz;
@@ -1129,7 +1196,7 @@ int __cpuinit local_setup_timer(unsigned
irq = bind_virq_to_irqhandler(VIRQ_TIMER,
cpu,
timer_interrupt,
- SA_INTERRUPT,
+ IRQF_DISABLED|IRQF_TIMER,
timer_name[cpu],
NULL);
if (irq < 0)
--- head-2010-04-29.orig/drivers/acpi/processor_perflib.c 2010-04-15 09:43:05.000000000 +0200
+++ head-2010-04-29/drivers/acpi/processor_perflib.c 2010-05-06 14:22:32.000000000 +0200
@@ -578,6 +578,8 @@ end:
return result;
}
+#ifndef CONFIG_PROCESSOR_EXTERNAL_CONTROL
+
int acpi_processor_preregister_performance(
struct acpi_processor_performance __percpu *performance)
{
@@ -793,3 +795,5 @@ acpi_processor_unregister_performance(st
}
EXPORT_SYMBOL(acpi_processor_unregister_performance);
+
+#endif /* !CONFIG_PROCESSOR_EXTERNAL_CONTROL */
--- head-2010-04-29.orig/drivers/char/agp/intel-agp.c 2010-04-15 09:43:13.000000000 +0200
+++ head-2010-04-29/drivers/char/agp/intel-agp.c 2010-04-15 09:52:07.000000000 +0200
@@ -452,6 +452,10 @@ static struct page *i8xx_alloc_pages(voi
if (set_pages_uc(page, 4) < 0) {
set_pages_wb(page, 4);
+#ifdef CONFIG_XEN
+ xen_destroy_contiguous_region((unsigned long)page_address(page),
+ 2);
+#endif
__free_pages(page, 2);
return NULL;
}
--- head-2010-04-29.orig/drivers/xen/console/console.c 2009-03-18 10:39:31.000000000 +0100
+++ head-2010-04-29/drivers/xen/console/console.c 2010-03-24 15:06:08.000000000 +0100
@@ -94,7 +94,6 @@ static int __init xencons_setup(char *st
{
char *q;
int n;
- extern int console_use_vt;
console_use_vt = 1;
if (!strncmp(str, "ttyS", 4)) {
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/pgtable_64.h 2009-06-23 09:28:21.000000000 +0200
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/pgtable_64.h 2010-03-24 15:06:08.000000000 +0100
@@ -394,7 +394,6 @@ static inline int pmd_large(pmd_t pte) {
/*
* Level 4 access.
- * Never use these in the common code.
*/
#define pgd_page(pgd) ((unsigned long) __va(pgd_val(pgd) & PTE_MASK))
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/processor_32.h 2008-01-28 12:24:19.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/processor_32.h 2010-03-24 15:06:08.000000000 +0100
@@ -23,7 +23,7 @@
#include <xen/interface/physdev.h>
/* flag for disabling the tsc */
-extern int tsc_disable;
+#define tsc_disable 0
struct desc_struct {
unsigned long a,b;
--- head-2010-04-29.orig/arch/x86/include/asm/thread_info.h 2010-05-06 14:21:27.000000000 +0200
+++ head-2010-04-29/arch/x86/include/asm/thread_info.h 2010-03-24 15:06:08.000000000 +0100
@@ -146,11 +146,15 @@ struct thread_info {
_TIF_USER_RETURN_NOTIFY)
/* flags to check in __switch_to() */
+#ifndef CONFIG_XEN
#define _TIF_WORK_CTXSW \
(_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_NOTSC)
#define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY)
#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
+#else
+#define _TIF_WORK_CTXSW _TIF_DEBUG
+#endif
#define PREEMPT_ACTIVE 0x10000000
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