aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorRusty Russell <rusty@rustcorp.com.au>2006-12-07 02:14:08 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:08 +0100
commit13623d79309dd82e1964458fa017979d16f33fa8 (patch)
treeb994f0ba2cd7aec284e4132cf00acc0fecaa887e
parent6020c8f315709a508b027ef6749e85b125190947 (diff)
[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>
-rw-r--r--arch/i386/kernel/paravirt.c8
-rw-r--r--include/asm-i386/apic.h15
-rw-r--r--include/asm-i386/paravirt.h27
3 files changed, 47 insertions, 3 deletions
diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c
index 5a9bd3250a1..fe82eb3adf4 100644
--- a/arch/i386/kernel/paravirt.c
+++ b/arch/i386/kernel/paravirt.c
@@ -29,6 +29,8 @@
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/delay.h>
+#include <asm/fixmap.h>
+#include <asm/apic.h>
/* nop stub */
static void native_nop(void)
@@ -446,6 +448,12 @@ struct paravirt_ops paravirt_ops = {
.io_delay = native_io_delay,
.const_udelay = __const_udelay,
+#ifdef CONFIG_X86_LOCAL_APIC
+ .apic_write = native_apic_write,
+ .apic_write_atomic = native_apic_write_atomic,
+ .apic_read = native_apic_read,
+#endif
+
.irq_enable_sysexit = native_irq_enable_sysexit,
.iret = native_iret,
};
diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h
index b9529578fc3..41a44319905 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 dd707d8c827..e2c803fadb1 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 */