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x2apic: xen64 paravirt basic apic ops 

Define the Xen specific basic apic ops, in additon to paravirt apic ops,
with some misc warning fixes.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: akpm@linux-foundation.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Suresh Siddha 2008-07-11 13:11:56 -07:00 committed by Ingo Molnar
parent 277d1f5846
commit ad66dd340f
3 changed files with 49 additions and 10 deletions
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4
arch/x86/lguest/boot.c
View File

@ -783,11 +783,11 @@ static void lguest_wbinvd(void)
* code qualifies for Advanced. It will also never interrupt anything. It
* does, however, allow us to get through the Linux boot code. */
#ifdef CONFIG_X86_LOCAL_APIC
static void lguest_apic_write(unsigned long reg, u32 v)
static void lguest_apic_write(u32 reg, u32 v)
{
}
static u32 lguest_apic_read(unsigned long reg)
static u32 lguest_apic_read(u32 reg)
{
return 0;
}

41
arch/x86/xen/enlighten.c
View File

@ -548,16 +548,45 @@ static void xen_io_delay(void)
}
#ifdef CONFIG_X86_LOCAL_APIC
static u32 xen_apic_read(unsigned long reg)
static u32 xen_apic_read(u32 reg)
{
return 0;
}
static void xen_apic_write(unsigned long reg, u32 val)
static void xen_apic_write(u32 reg, u32 val)
{
/* Warn to see if there's any stray references */
WARN_ON(1);
}
#ifdef CONFIG_X86_64
static u64 xen_apic_icr_read(void)
{
return 0;
}
static void xen_apic_icr_write(u32 low, u32 id)
{
/* Warn to see if there's any stray references */
WARN_ON(1);
}
static void xen_apic_wait_icr_idle(void)
{
return;
}
static struct apic_ops xen_basic_apic_ops = {
.read = xen_apic_read,
.write = xen_apic_write,
.write_atomic = xen_apic_write,
.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,
};
#endif
#endif
static void xen_flush_tlb(void)
@ -1130,9 +1159,11 @@ static const struct pv_irq_ops xen_irq_ops __initdata = {
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,
@ -1291,6 +1322,12 @@ asmlinkage void __init xen_start_kernel(void)
pv_irq_ops = xen_irq_ops;
pv_apic_ops = xen_apic_ops;
pv_mmu_ops = xen_mmu_ops;
#ifdef CONFIG_X86_64
/*
* for 64bit, set up the basic apic ops aswell.
*/
apic_ops = &xen_basic_apic_ops;
#endif
if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;

14
include/asm-x86/paravirt.h
View File

@ -200,13 +200,15 @@ 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)(unsigned long reg, u32 v);
void (*apic_write_atomic)(unsigned long reg, u32 v);
u32 (*apic_read)(unsigned long reg);
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);
@ -892,17 +894,17 @@ static inline void slow_down_io(void)
* Basic functions accessing APICs.
*/
#ifndef CONFIG_X86_64
static inline void apic_write(unsigned long reg, u32 v)
static inline void apic_write(u32 reg, u32 v)
{
PVOP_VCALL2(pv_apic_ops.apic_write, reg, v);
}
static inline void apic_write_atomic(unsigned long reg, u32 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(unsigned long reg)
static inline u32 apic_read(u32 reg)
{
return PVOP_CALL1(unsigned long, pv_apic_ops.apic_read, reg);
}