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Date: Sun, 13 Jul 2008 22:19:35 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Suresh Siddha <suresh.b.siddha@...el.com>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: let 32bit use apic_ops too - fix
fix for pv.
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
---
arch/x86/kernel/paravirt.c | 5 ----
arch/x86/kernel/vmi_32.c | 51 ++++++++++++++++++++++++++++++++++++++++++---
arch/x86/xen/enlighten.c | 19 +++++++---------
include/asm-x86/paravirt.h | 29 -------------------------
4 files changed, 57 insertions(+), 47 deletions(-)
Index: linux-2.6/arch/x86/kernel/paravirt.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/paravirt.c
+++ linux-2.6/arch/x86/kernel/paravirt.c
@@ -373,11 +373,6 @@ struct pv_cpu_ops pv_cpu_ops = {
struct pv_apic_ops pv_apic_ops = {
#ifdef CONFIG_X86_LOCAL_APIC
-#ifndef CONFIG_X86_64
- .apic_write = native_apic_mem_write,
- .apic_write_atomic = native_apic_mem_write_atomic,
- .apic_read = native_apic_mem_read,
-#endif
.setup_boot_clock = setup_boot_APIC_clock,
.setup_secondary_clock = setup_secondary_APIC_clock,
.startup_ipi_hook = paravirt_nop,
Index: linux-2.6/arch/x86/kernel/vmi_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/vmi_32.c
+++ linux-2.6/arch/x86/kernel/vmi_32.c
@@ -676,6 +676,50 @@ static inline int __init probe_vmi_rom(v
return 0;
}
+#ifdef CONFIG_X86_LOCAL_APIC
+static u32 vmi_apic_read(u32 reg)
+{
+ return 0;
+}
+
+static void vmi_apic_write(u32 reg, u32 val)
+{
+ /* Warn to see if there's any stray references */
+ WARN_ON(1);
+}
+
+static u64 vmi_apic_icr_read(void)
+{
+ return 0;
+}
+
+static void vmi_apic_icr_write(u32 low, u32 id)
+{
+ /* Warn to see if there's any stray references */
+ WARN_ON(1);
+}
+
+static void vmi_apic_wait_icr_idle(void)
+{
+ return;
+}
+
+static u32 vmi_safe_apic_wait_icr_idle(void)
+{
+ return 0;
+}
+
+static struct apic_ops vmi_basic_apic_ops = {
+ .read = vmi_apic_read,
+ .write = vmi_apic_write,
+ .write_atomic = vmi_apic_write,
+ .icr_read = vmi_apic_icr_read,
+ .icr_write = vmi_apic_icr_write,
+ .wait_icr_idle = vmi_apic_wait_icr_idle,
+ .safe_wait_icr_idle = vmi_safe_apic_wait_icr_idle,
+};
+#endif
+
/*
* VMI setup common to all processors
*/
@@ -904,9 +948,10 @@ static inline int __init activate_vmi(vo
#endif
#ifdef CONFIG_X86_LOCAL_APIC
- para_fill(pv_apic_ops.apic_read, APICRead);
- para_fill(pv_apic_ops.apic_write, APICWrite);
- para_fill(pv_apic_ops.apic_write_atomic, APICWrite);
+ para_fill(vmi_basic_apic_ops.read, APICRead);
+ para_fill(vmi_basic_apic_ops.write, APICWrite);
+ para_fill(vmi_basic_apic_ops.write_atomic, APICWrite);
+ apic_ops = &vmi_basic_apic_ops;
#endif
/*
Index: linux-2.6/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6.orig/arch/x86/xen/enlighten.c
+++ linux-2.6/arch/x86/xen/enlighten.c
@@ -587,7 +587,6 @@ static void xen_apic_write(u32 reg, u32
WARN_ON(1);
}
-#ifdef CONFIG_X86_64
static u64 xen_apic_icr_read(void)
{
return 0;
@@ -604,6 +603,11 @@ static void xen_apic_wait_icr_idle(void)
return;
}
+static u32 xen_safe_apic_wait_icr_idle(void)
+{
+ return 0;
+}
+
static struct apic_ops xen_basic_apic_ops = {
.read = xen_apic_read,
.write = xen_apic_write,
@@ -611,9 +615,8 @@ static struct apic_ops xen_basic_apic_op
.icr_read = xen_apic_icr_read,
.icr_write = xen_apic_icr_write,
.wait_icr_idle = xen_apic_wait_icr_idle,
- .safe_wait_icr_idle = xen_apic_wait_icr_idle,
+ .safe_wait_icr_idle = xen_safe_apic_wait_icr_idle,
};
-#endif
#endif
@@ -1298,11 +1301,6 @@ static const struct pv_irq_ops xen_irq_o
static const struct pv_apic_ops xen_apic_ops __initdata = {
#ifdef CONFIG_X86_LOCAL_APIC
-#ifndef CONFIG_X86_64
- .apic_write = xen_apic_write,
- .apic_write_atomic = xen_apic_write,
- .apic_read = xen_apic_read,
-#endif
.setup_boot_clock = paravirt_nop,
.setup_secondary_clock = paravirt_nop,
.startup_ipi_hook = paravirt_nop,
@@ -1704,9 +1702,10 @@ asmlinkage void __init xen_start_kernel(
pv_irq_ops = xen_irq_ops;
pv_apic_ops = xen_apic_ops;
pv_mmu_ops = xen_mmu_ops;
-#ifdef CONFIG_X86_64
+
+#ifdef CONFIG_X86_LOCAL_APIC
/*
- * for 64bit, set up the basic apic ops aswell.
+ * set up the basic apic ops.
*/
apic_ops = &xen_basic_apic_ops;
#endif
Index: linux-2.6/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6.orig/include/asm-x86/paravirt.h
+++ linux-2.6/include/asm-x86/paravirt.h
@@ -200,15 +200,6 @@ struct pv_irq_ops {
struct pv_apic_ops {
#ifdef CONFIG_X86_LOCAL_APIC
-#ifndef CONFIG_X86_64
- /*
- * Direct APIC operations, principally for VMI. Ideally
- * these shouldn't be in this interface.
- */
- void (*apic_write)(u32 reg, u32 v);
- void (*apic_write_atomic)(u32 reg, u32 v);
- u32 (*apic_read)(u32 reg);
-#endif
void (*setup_boot_clock)(void);
void (*setup_secondary_clock)(void);
@@ -901,26 +892,6 @@ static inline void slow_down_io(void)
}
#ifdef CONFIG_X86_LOCAL_APIC
-/*
- * Basic functions accessing APICs.
- */
-#ifndef CONFIG_X86_64
-static inline void apic_write(u32 reg, u32 v)
-{
- PVOP_VCALL2(pv_apic_ops.apic_write, reg, v);
-}
-
-static inline void apic_write_atomic(u32 reg, u32 v)
-{
- PVOP_VCALL2(pv_apic_ops.apic_write_atomic, reg, v);
-}
-
-static inline u32 apic_read(u32 reg)
-{
- return PVOP_CALL1(unsigned long, pv_apic_ops.apic_read, reg);
-}
-#endif
-
static inline void setup_boot_clock(void)
{
PVOP_VCALL0(pv_apic_ops.setup_boot_clock);
--
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