diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2006-12-07 02:14:08 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:08 +0100 |
| commit | 13623d79309dd82e1964458fa017979d16f33fa8 (patch) | |
| tree | b994f0ba2cd7aec284e4132cf00acc0fecaa887e /include/asm-i386 | |
| parent | [PATCH] paravirt: Allow disable power management under hypervisor (diff) | |
| download | linux-13623d79309dd82e1964458fa017979d16f33fa8.tar.xz linux-13623d79309dd82e1964458fa017979d16f33fa8.zip | |
[PATCH] paravirt: Add APIC accessors to paravirt-ops.
Add APIC accessors to paravirt-ops. Unfortunately, we need two write
functions, as some older broken hardware requires workarounds for
Pentium APIC errata - this is the purpose of apic_write_atomic.
AK: replaced __inline with inline
Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/apic.h | 15 | ||||
| -rw-r--r-- | include/asm-i386/paravirt.h | 27 |
2 files changed, 39 insertions, 3 deletions
diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h index b9529578fc37..41a44319905f 100644 --- a/include/asm-i386/apic.h +++ b/include/asm-i386/apic.h @@ -37,18 +37,27 @@ extern void generic_apic_probe(void); /* * Basic functions accessing APICs. */ +#ifdef CONFIG_PARAVIRT +#include <asm/paravirt.h> +#else +#define apic_write native_apic_write +#define apic_write_atomic native_apic_write_atomic +#define apic_read native_apic_read +#endif -static __inline void apic_write(unsigned long reg, unsigned long v) +static __inline fastcall void native_apic_write(unsigned long reg, + unsigned long v) { *((volatile unsigned long *)(APIC_BASE+reg)) = v; } -static __inline void apic_write_atomic(unsigned long reg, unsigned long v) +static __inline fastcall void native_apic_write_atomic(unsigned long reg, + unsigned long v) { xchg((volatile unsigned long *)(APIC_BASE+reg), v); } -static __inline unsigned long apic_read(unsigned long reg) +static __inline fastcall unsigned long native_apic_read(unsigned long reg) { return *((volatile unsigned long *)(APIC_BASE+reg)); } diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h index dd707d8c8270..e2c803fadb14 100644 --- a/include/asm-i386/paravirt.h +++ b/include/asm-i386/paravirt.h @@ -115,6 +115,12 @@ struct paravirt_ops void (fastcall *io_delay)(void); void (*const_udelay)(unsigned long loops); +#ifdef CONFIG_X86_LOCAL_APIC + void (fastcall *apic_write)(unsigned long reg, unsigned long v); + void (fastcall *apic_write_atomic)(unsigned long reg, unsigned long v); + unsigned long (fastcall *apic_read)(unsigned long reg); +#endif + /* These two are jmp to, not actually called. */ void (fastcall *irq_enable_sysexit)(void); void (fastcall *iret)(void); @@ -270,6 +276,27 @@ static inline void slow_down_io(void) { #endif } +#ifdef CONFIG_X86_LOCAL_APIC +/* + * Basic functions accessing APICs. + */ +static inline void apic_write(unsigned long reg, unsigned long v) +{ + paravirt_ops.apic_write(reg,v); +} + +static inline void apic_write_atomic(unsigned long reg, unsigned long v) +{ + paravirt_ops.apic_write_atomic(reg,v); +} + +static inline unsigned long apic_read(unsigned long reg) +{ + return paravirt_ops.apic_read(reg); +} +#endif + + /* These all sit in the .parainstructions section to tell us what to patch. */ struct paravirt_patch { u8 *instr; /* original instructions */ |