Displaying 12 results from an estimated 12 matches for "apic_icr".
2012 Apr 20
1
[PATCH v2 0/2] fix "perf top" soft lockups under Xen
...now.
The soft lockup code path is:
__irq_work_queue
arch_irq_work_raise
apic->send_IPI_self(IRQ_WORK_VECTOR);
apic_send_IPI_self
__default_send_IPI_shortcut
__xapic_wait_icr_idle
static inline void __xapic_wait_icr_idle(void)
{
while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
cpu_relax();
}
The lockup happens at above while looop.
The cause is that Xen has not implemented the APIC IPI interface yet.
Xen has IPI interface: xen_send_IPI_one, but it''s only used in
xen_smp_send_reschedule, xen_smp_send_call_function_ipi and
xe...
2012 Dec 12
7
[PATCH V5] x86/kexec: Change NMI and MCE handling on kexec path
...*/
- if ( cpu == crashing_cpu )
- return 1;
- local_irq_disable();
+ switch ( current_local_apic_mode() )
+ {
+ u32 apic_id;
- kexec_crash_save_cpu();
+ case APIC_MODE_X2APIC:
+ apic_id = apic_rdmsr(APIC_ID);
- __stop_this_cpu();
+ apic_wrmsr(APIC_ICR, APIC_DM_NMI | APIC_DEST_PHYSICAL | ((u64)apic_id << 32));
+ break;
- atomic_dec(&waiting_for_crash_ipi);
+ case APIC_MODE_XAPIC:
+ apic_id = GET_xAPIC_ID(apic_mem_read(APIC_ID));
+
+ while ( apic_mem_read(APIC_ICR) & APIC_ICR_BUSY )
+ cpu_relax...
2007 Apr 18
0
[RFC/PATCH PV_OPS X86_64 04/17] pavarvirt_ops - apci header updates
...eturn *((volatile unsigned int *)(APIC_BASE+reg));
}
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define apic_write native_apic_write
+#define apic_read native_apic_read
+
+#endif /* CONFIG_PARAVIRT */
+
static __inline__ void apic_wait_icr_idle(void)
{
while (apic_read( APIC_ICR ) & APIC_ICR_BUSY)
--
2007 Apr 18
0
[RFC/PATCH PV_OPS X86_64 04/17] pavarvirt_ops - apci header updates
...eturn *((volatile unsigned int *)(APIC_BASE+reg));
}
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define apic_write native_apic_write
+#define apic_read native_apic_read
+
+#endif /* CONFIG_PARAVIRT */
+
static __inline__ void apic_wait_icr_idle(void)
{
while (apic_read( APIC_ICR ) & APIC_ICR_BUSY)
--
2012 Apr 15
0
(no subject)
...too?
The soft lockup code path is:
__irq_work_queue
arch_irq_work_raise
apic->send_IPI_self(IRQ_WORK_VECTOR);
apic_send_IPI_self
__default_send_IPI_shortcut
__xapic_wait_icr_idle
static inline void __xapic_wait_icr_idle(void)
{
while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
cpu_relax();
}
The lockup happens at above while looop.
The cause is that Xen has not implemented the APIC IPI interface yet.
Xen has IPI interface: xen_send_IPI_one, but it''s only used...
2012 Apr 15
0
Re: [PATCH 0/2] fix "perf top" soft lockups under Xen
..._irq_work_queue
> arch_irq_work_raise
> apic->send_IPI_self(IRQ_WORK_VECTOR);
> apic_send_IPI_self
> __default_send_IPI_shortcut
> __xapic_wait_icr_idle
>
> static inline void __xapic_wait_icr_idle(void)
> {
> while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
> cpu_relax();
> }
>
> The lockup happens at above while looop.
>
> The cause is that Xen has not implemented the APIC IPI interface yet.
> Xen has IPI interface: xen_send_IPI_one, but it''s only used in
> xen_smp_send_reschedule,...
2007 Apr 18
0
[RFC, PATCH 15/24] i386 Vmi apic header
...tomic(unsigned long reg, unsigned long v)
-{
- xchg((volatile unsigned long *)(APIC_BASE+reg), v);
-}
-
-static __inline unsigned long apic_read(unsigned long reg)
-{
- return *((volatile unsigned long *)(APIC_BASE+reg));
-}
-
static __inline__ void apic_wait_icr_idle(void)
{
while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
Index: linux-2.6.16-rc5/include/asm-i386/mach-vmi/mach_apicops.h
===================================================================
--- linux-2.6.16-rc5.orig/include/asm-i386/mach-vmi/mach_apicops.h 2006-03-10 13:03:37.000000000 -0800
+++ linux-2.6.16-rc5/include/asm-i386/m...
2007 Apr 18
0
[RFC, PATCH 15/24] i386 Vmi apic header
...tomic(unsigned long reg, unsigned long v)
-{
- xchg((volatile unsigned long *)(APIC_BASE+reg), v);
-}
-
-static __inline unsigned long apic_read(unsigned long reg)
-{
- return *((volatile unsigned long *)(APIC_BASE+reg));
-}
-
static __inline__ void apic_wait_icr_idle(void)
{
while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
Index: linux-2.6.16-rc5/include/asm-i386/mach-vmi/mach_apicops.h
===================================================================
--- linux-2.6.16-rc5.orig/include/asm-i386/mach-vmi/mach_apicops.h 2006-03-10 13:03:37.000000000 -0800
+++ linux-2.6.16-rc5/include/asm-i386/m...
2007 Apr 18
2
refactoring io_apic.c
...- see Intel Dev. Manual Vol. 3, Ch. 8.6.1 */
- unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
- if (ver >= 0x14) /* P4 or higher */
- return;
- /*
- * Wait for idle.
- */
- apic_wait_icr_idle();
-
- apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
- apic_write_around(APIC_ICR, APIC_DEST_ALLINC | APIC_INT_LEVELTRIG
- | APIC_DM_INIT);
-}
-
extern void __error_in_apic_c (void);
/*
diff -purN -X /home/mbligh/.diff.exclude virgin/arch/i386/kernel/io_apic.c io_apic_split/arch/i386/kernel/io_apic.c
--- virgin/arch/i386/kernel/io_apic.c 2005-06-17 12:48:29.000000000 -070...
2007 Apr 18
2
refactoring io_apic.c
...- see Intel Dev. Manual Vol. 3, Ch. 8.6.1 */
- unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
- if (ver >= 0x14) /* P4 or higher */
- return;
- /*
- * Wait for idle.
- */
- apic_wait_icr_idle();
-
- apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
- apic_write_around(APIC_ICR, APIC_DEST_ALLINC | APIC_INT_LEVELTRIG
- | APIC_DM_INIT);
-}
-
extern void __error_in_apic_c (void);
/*
diff -purN -X /home/mbligh/.diff.exclude virgin/arch/i386/kernel/io_apic.c io_apic_split/arch/i386/kernel/io_apic.c
--- virgin/arch/i386/kernel/io_apic.c 2005-06-17 12:48:29.000000000 -070...
2007 Apr 18
2
[PATCH] x86_64 paravirt_ops port
...eturn *((volatile unsigned int *)(APIC_BASE+reg));
}
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define apic_write native_apic_write
+#define apic_read native_apic_read
+
+#endif /* CONFIG_PARAVIRT */
+
static __inline__ void apic_wait_icr_idle(void)
{
while (apic_read( APIC_ICR ) & APIC_ICR_BUSY)
Index: linux-2.6.19-quilt/include/asm-x86_64/desc.h
===================================================================
--- linux-2.6.19-quilt.orig/include/asm-x86_64/desc.h
+++ linux-2.6.19-quilt/include/asm-x86_64/desc.h
@@ -16,9 +16,8 @@
extern struct desc_struct cpu_gd...
2007 Apr 18
2
[PATCH] x86_64 paravirt_ops port
...eturn *((volatile unsigned int *)(APIC_BASE+reg));
}
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define apic_write native_apic_write
+#define apic_read native_apic_read
+
+#endif /* CONFIG_PARAVIRT */
+
static __inline__ void apic_wait_icr_idle(void)
{
while (apic_read( APIC_ICR ) & APIC_ICR_BUSY)
Index: linux-2.6.19-quilt/include/asm-x86_64/desc.h
===================================================================
--- linux-2.6.19-quilt.orig/include/asm-x86_64/desc.h
+++ linux-2.6.19-quilt/include/asm-x86_64/desc.h
@@ -16,9 +16,8 @@
extern struct desc_struct cpu_gd...