[PATCH] paravirt: header and stubs for paravirtualisation
Create a paravirt.h header for all the critical operations which need to be
replaced with hypervisor calls, and include that instead of defining native
operations, when CONFIG_PARAVIRT.
This patch does the dumbest possible replacement of paravirtualized
instructions: calls through a "paravirt_ops" structure. Currently these are
function implementations of native hardware: hypervisors will override the ops
structure with their own variants.
All the pv-ops functions are declared "fastcall" so that a specific
register-based ABI is used, to make inlining assember easier.
And:
+From: Andy Whitcroft <apw@shadowen.org>
The paravirt ops introduce a 'weak' attribute onto memory_setup().
Code ordering leads to the following warnings on x86:
arch/i386/kernel/setup.c:651: warning: weak declaration of
`memory_setup' after first use results in unspecified behavior
Move memory_setup() to avoid this.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
diff --git a/include/asm-i386/delay.h b/include/asm-i386/delay.h
index 9ae5e37..32d6678 100644
--- a/include/asm-i386/delay.h
+++ b/include/asm-i386/delay.h
@@ -16,6 +16,13 @@
extern void __const_udelay(unsigned long usecs);
extern void __delay(unsigned long loops);
+#if defined(CONFIG_PARAVIRT) && !defined(USE_REAL_TIME_DELAY)
+#define udelay(n) paravirt_ops.const_udelay((n) * 0x10c7ul)
+
+#define ndelay(n) paravirt_ops.const_udelay((n) * 5ul)
+
+#else /* !PARAVIRT || USE_REAL_TIME_DELAY */
+
/* 0x10c7 is 2**32 / 1000000 (rounded up) */
#define udelay(n) (__builtin_constant_p(n) ? \
((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
@@ -25,6 +32,7 @@
#define ndelay(n) (__builtin_constant_p(n) ? \
((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
__ndelay(n))
+#endif
void use_tsc_delay(void);
diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h
index 6cf2ac2..f19820f 100644
--- a/include/asm-i386/desc.h
+++ b/include/asm-i386/desc.h
@@ -55,6 +55,9 @@
#define DESCTYPE_DPL3 0x60 /* DPL-3 */
#define DESCTYPE_S 0x10 /* !system */
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
@@ -105,7 +108,11 @@
write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
}
-static inline void set_ldt(void *addr, unsigned int entries)
+#define set_ldt native_set_ldt
+#endif /* CONFIG_PARAVIRT */
+
+static inline fastcall void native_set_ldt(const void *addr,
+ unsigned int entries)
{
if (likely(entries == 0))
__asm__ __volatile__("lldt %w0"::"q" (0));
diff --git a/include/asm-i386/io.h b/include/asm-i386/io.h
index 68df0dc3..86ff5e8 100644
--- a/include/asm-i386/io.h
+++ b/include/asm-i386/io.h
@@ -256,11 +256,11 @@
#endif /* __KERNEL__ */
-#ifdef SLOW_IO_BY_JUMPING
-#define __SLOW_DOWN_IO "jmp 1f; 1: jmp 1f; 1:"
+#if defined(CONFIG_PARAVIRT)
+#include <asm/paravirt.h>
#else
+
#define __SLOW_DOWN_IO "outb %%al,$0x80;"
-#endif
static inline void slow_down_io(void) {
__asm__ __volatile__(
@@ -271,6 +271,8 @@
: : );
}
+#endif
+
#ifdef CONFIG_X86_NUMAQ
extern void *xquad_portio; /* Where the IO area was mapped */
#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
diff --git a/include/asm-i386/irq.h b/include/asm-i386/irq.h
index 331726b..9e15ce0 100644
--- a/include/asm-i386/irq.h
+++ b/include/asm-i386/irq.h
@@ -41,4 +41,7 @@
extern void fixup_irqs(cpumask_t map);
#endif
+void init_IRQ(void);
+void __init native_init_IRQ(void);
+
#endif /* _ASM_IRQ_H */
diff --git a/include/asm-i386/irqflags.h b/include/asm-i386/irqflags.h
index e1bdb97..9ce01f3 100644
--- a/include/asm-i386/irqflags.h
+++ b/include/asm-i386/irqflags.h
@@ -10,6 +10,9 @@
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
#ifndef __ASSEMBLY__
static inline unsigned long __raw_local_save_flags(void)
@@ -25,9 +28,6 @@
return flags;
}
-#define raw_local_save_flags(flags) \
- do { (flags) = __raw_local_save_flags(); } while (0)
-
static inline void raw_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
@@ -66,18 +66,6 @@
__asm__ __volatile__("hlt": : :"memory");
}
-static inline int raw_irqs_disabled_flags(unsigned long flags)
-{
- return !(flags & (1 << 9));
-}
-
-static inline int raw_irqs_disabled(void)
-{
- unsigned long flags = __raw_local_save_flags();
-
- return raw_irqs_disabled_flags(flags);
-}
-
/*
* For spinlocks, etc:
*/
@@ -90,9 +78,33 @@
return flags;
}
+#else
+#define DISABLE_INTERRUPTS cli
+#define ENABLE_INTERRUPTS sti
+#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
+#define INTERRUPT_RETURN iret
+#define GET_CR0_INTO_EAX movl %cr0, %eax
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_PARAVIRT */
+
+#ifndef __ASSEMBLY__
+#define raw_local_save_flags(flags) \
+ do { (flags) = __raw_local_save_flags(); } while (0)
+
#define raw_local_irq_save(flags) \
do { (flags) = __raw_local_irq_save(); } while (0)
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (1 << 9));
+}
+
+static inline int raw_irqs_disabled(void)
+{
+ unsigned long flags = __raw_local_save_flags();
+
+ return raw_irqs_disabled_flags(flags);
+}
#endif /* __ASSEMBLY__ */
/*
diff --git a/include/asm-i386/mach-default/setup_arch.h b/include/asm-i386/mach-default/setup_arch.h
index fb42099e..605e3cc 100644
--- a/include/asm-i386/mach-default/setup_arch.h
+++ b/include/asm-i386/mach-default/setup_arch.h
@@ -2,4 +2,6 @@
/* no action for generic */
+#ifndef ARCH_SETUP
#define ARCH_SETUP
+#endif
diff --git a/include/asm-i386/msr.h b/include/asm-i386/msr.h
index 1820d9d..5679d49 100644
--- a/include/asm-i386/msr.h
+++ b/include/asm-i386/msr.h
@@ -1,6 +1,10 @@
#ifndef __ASM_MSR_H
#define __ASM_MSR_H
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+
/*
* Access to machine-specific registers (available on 586 and better only)
* Note: the rd* operations modify the parameters directly (without using
@@ -77,6 +81,7 @@
__asm__ __volatile__("rdpmc" \
: "=a" (low), "=d" (high) \
: "c" (counter))
+#endif /* !CONFIG_PARAVIRT */
/* symbolic names for some interesting MSRs */
/* Intel defined MSRs. */
diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h
new file mode 100644
index 0000000..a7551a4
--- /dev/null
+++ b/include/asm-i386/paravirt.h
@@ -0,0 +1,281 @@
+#ifndef __ASM_PARAVIRT_H
+#define __ASM_PARAVIRT_H
+/* Various instructions on x86 need to be replaced for
+ * para-virtualization: those hooks are defined here. */
+#include <linux/linkage.h>
+
+#ifdef CONFIG_PARAVIRT
+#ifndef __ASSEMBLY__
+struct thread_struct;
+struct Xgt_desc_struct;
+struct tss_struct;
+struct paravirt_ops
+{
+ unsigned int kernel_rpl;
+ int paravirt_enabled;
+ const char *name;
+
+ void (*arch_setup)(void);
+ char *(*memory_setup)(void);
+ void (*init_IRQ)(void);
+
+ void (*banner)(void);
+
+ unsigned long (*get_wallclock)(void);
+ int (*set_wallclock)(unsigned long);
+ void (*time_init)(void);
+
+ /* All the function pointers here are declared as "fastcall"
+ so that we get a specific register-based calling
+ convention. This makes it easier to implement inline
+ assembler replacements. */
+
+ void (fastcall *cpuid)(unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx);
+
+ unsigned long (fastcall *get_debugreg)(int regno);
+ void (fastcall *set_debugreg)(int regno, unsigned long value);
+
+ void (fastcall *clts)(void);
+
+ unsigned long (fastcall *read_cr0)(void);
+ void (fastcall *write_cr0)(unsigned long);
+
+ unsigned long (fastcall *read_cr2)(void);
+ void (fastcall *write_cr2)(unsigned long);
+
+ unsigned long (fastcall *read_cr3)(void);
+ void (fastcall *write_cr3)(unsigned long);
+
+ unsigned long (fastcall *read_cr4_safe)(void);
+ unsigned long (fastcall *read_cr4)(void);
+ void (fastcall *write_cr4)(unsigned long);
+
+ unsigned long (fastcall *save_fl)(void);
+ void (fastcall *restore_fl)(unsigned long);
+ void (fastcall *irq_disable)(void);
+ void (fastcall *irq_enable)(void);
+ void (fastcall *safe_halt)(void);
+ void (fastcall *halt)(void);
+ void (fastcall *wbinvd)(void);
+
+ /* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
+ u64 (fastcall *read_msr)(unsigned int msr, int *err);
+ int (fastcall *write_msr)(unsigned int msr, u64 val);
+
+ u64 (fastcall *read_tsc)(void);
+ u64 (fastcall *read_pmc)(void);
+
+ void (fastcall *load_tr_desc)(void);
+ void (fastcall *load_gdt)(const struct Xgt_desc_struct *);
+ void (fastcall *load_idt)(const struct Xgt_desc_struct *);
+ void (fastcall *store_gdt)(struct Xgt_desc_struct *);
+ void (fastcall *store_idt)(struct Xgt_desc_struct *);
+ void (fastcall *set_ldt)(const void *desc, unsigned entries);
+ unsigned long (fastcall *store_tr)(void);
+ void (fastcall *load_tls)(struct thread_struct *t, unsigned int cpu);
+ void (fastcall *write_ldt_entry)(void *dt, int entrynum,
+ u32 low, u32 high);
+ void (fastcall *write_gdt_entry)(void *dt, int entrynum,
+ u32 low, u32 high);
+ void (fastcall *write_idt_entry)(void *dt, int entrynum,
+ u32 low, u32 high);
+ void (fastcall *load_esp0)(struct tss_struct *tss,
+ struct thread_struct *thread);
+
+ void (fastcall *set_iopl_mask)(unsigned mask);
+
+ void (fastcall *io_delay)(void);
+ void (*const_udelay)(unsigned long loops);
+
+ /* These two are jmp to, not actually called. */
+ void (fastcall *irq_enable_sysexit)(void);
+ void (fastcall *iret)(void);
+};
+
+extern struct paravirt_ops paravirt_ops;
+
+#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
+
+static inline void load_esp0(struct tss_struct *tss,
+ struct thread_struct *thread)
+{
+ paravirt_ops.load_esp0(tss, thread);
+}
+
+#define ARCH_SETUP paravirt_ops.arch_setup();
+static inline unsigned long get_wallclock(void)
+{
+ return paravirt_ops.get_wallclock();
+}
+
+static inline int set_wallclock(unsigned long nowtime)
+{
+ return paravirt_ops.set_wallclock(nowtime);
+}
+
+static inline void do_time_init(void)
+{
+ return paravirt_ops.time_init();
+}
+
+/* The paravirtualized CPUID instruction. */
+static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx)
+{
+ paravirt_ops.cpuid(eax, ebx, ecx, edx);
+}
+
+/*
+ * These special macros can be used to get or set a debugging register
+ */
+#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
+#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
+
+#define clts() paravirt_ops.clts()
+
+#define read_cr0() paravirt_ops.read_cr0()
+#define write_cr0(x) paravirt_ops.write_cr0(x)
+
+#define read_cr2() paravirt_ops.read_cr2()
+#define write_cr2(x) paravirt_ops.write_cr2(x)
+
+#define read_cr3() paravirt_ops.read_cr3()
+#define write_cr3(x) paravirt_ops.write_cr3(x)
+
+#define read_cr4() paravirt_ops.read_cr4()
+#define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
+#define write_cr4(x) paravirt_ops.write_cr4(x)
+
+static inline unsigned long __raw_local_save_flags(void)
+{
+ return paravirt_ops.save_fl();
+}
+
+static inline void raw_local_irq_restore(unsigned long flags)
+{
+ return paravirt_ops.restore_fl(flags);
+}
+
+static inline void raw_local_irq_disable(void)
+{
+ paravirt_ops.irq_disable();
+}
+
+static inline void raw_local_irq_enable(void)
+{
+ paravirt_ops.irq_enable();
+}
+
+static inline unsigned long __raw_local_irq_save(void)
+{
+ unsigned long flags = paravirt_ops.save_fl();
+
+ paravirt_ops.irq_disable();
+
+ return flags;
+}
+
+static inline void raw_safe_halt(void)
+{
+ paravirt_ops.safe_halt();
+}
+
+static inline void halt(void)
+{
+ paravirt_ops.safe_halt();
+}
+#define wbinvd() paravirt_ops.wbinvd()
+
+#define get_kernel_rpl() (paravirt_ops.kernel_rpl)
+
+#define rdmsr(msr,val1,val2) do { \
+ int _err; \
+ u64 _l = paravirt_ops.read_msr(msr,&_err); \
+ val1 = (u32)_l; \
+ val2 = _l >> 32; \
+} while(0)
+
+#define wrmsr(msr,val1,val2) do { \
+ u64 _l = ((u64)(val2) << 32) | (val1); \
+ paravirt_ops.write_msr((msr), _l); \
+} while(0)
+
+#define rdmsrl(msr,val) do { \
+ int _err; \
+ val = paravirt_ops.read_msr((msr),&_err); \
+} while(0)
+
+#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
+#define wrmsr_safe(msr,a,b) ({ \
+ u64 _l = ((u64)(b) << 32) | (a); \
+ paravirt_ops.write_msr((msr),_l); \
+})
+
+/* rdmsr with exception handling */
+#define rdmsr_safe(msr,a,b) ({ \
+ int _err; \
+ u64 _l = paravirt_ops.read_msr(msr,&_err); \
+ (*a) = (u32)_l; \
+ (*b) = _l >> 32; \
+ _err; })
+
+#define rdtsc(low,high) do { \
+ u64 _l = paravirt_ops.read_tsc(); \
+ low = (u32)_l; \
+ high = _l >> 32; \
+} while(0)
+
+#define rdtscl(low) do { \
+ u64 _l = paravirt_ops.read_tsc(); \
+ low = (int)_l; \
+} while(0)
+
+#define rdtscll(val) (val = paravirt_ops.read_tsc())
+
+#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
+
+#define rdpmc(counter,low,high) do { \
+ u64 _l = paravirt_ops.read_pmc(); \
+ low = (u32)_l; \
+ high = _l >> 32; \
+} while(0)
+
+#define load_TR_desc() (paravirt_ops.load_tr_desc())
+#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
+#define load_idt(dtr) (paravirt_ops.load_idt(dtr))
+#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
+#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
+#define store_idt(dtr) (paravirt_ops.store_idt(dtr))
+#define store_tr(tr) ((tr) = paravirt_ops.store_tr())
+#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
+#define write_ldt_entry(dt, entry, low, high) \
+ (paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
+#define write_gdt_entry(dt, entry, low, high) \
+ (paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
+#define write_idt_entry(dt, entry, low, high) \
+ (paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
+#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
+
+/* The paravirtualized I/O functions */
+static inline void slow_down_io(void) {
+ paravirt_ops.io_delay();
+#ifdef REALLY_SLOW_IO
+ paravirt_ops.io_delay();
+ paravirt_ops.io_delay();
+ paravirt_ops.io_delay();
+#endif
+}
+
+#define CLI_STRING "pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_disable; popl %edx; popl %ecx; popl %eax"
+#define STI_STRING "pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_enable; popl %edx; popl %ecx; popl %eax"
+#else /* __ASSEMBLY__ */
+
+#define INTERRUPT_RETURN jmp *%cs:paravirt_ops+PARAVIRT_iret
+#define DISABLE_INTERRUPTS pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_disable; popl %edx; popl %ecx; popl %eax
+#define ENABLE_INTERRUPTS pushl %eax; pushl %ecx; pushl %edx; call *%cs:paravirt_ops+PARAVIRT_irq_enable; popl %edx; popl %ecx; popl %eax
+#define ENABLE_INTERRUPTS_SYSEXIT jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit
+#define GET_CR0_INTO_EAX call *paravirt_ops+PARAVIRT_read_cr0
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_PARAVIRT */
+#endif /* __ASM_PARAVIRT_H */
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index 98fa73b..6c2c445 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -144,8 +144,8 @@
#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
-static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
- unsigned int *ecx, unsigned int *edx)
+static inline fastcall void native_cpuid(unsigned int *eax, unsigned int *ebx,
+ unsigned int *ecx, unsigned int *edx)
{
/* ecx is often an input as well as an output. */
__asm__("cpuid"
@@ -491,6 +491,12 @@
.io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
}
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define paravirt_enabled() 0
+#define __cpuid native_cpuid
+
static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread)
{
tss->esp0 = thread->esp0;
@@ -524,10 +530,13 @@
: /* no output */ \
:"r" (value))
+#define set_iopl_mask native_set_iopl_mask
+#endif /* CONFIG_PARAVIRT */
+
/*
* Set IOPL bits in EFLAGS from given mask
*/
-static inline void set_iopl_mask(unsigned mask)
+static fastcall inline void native_set_iopl_mask(unsigned mask)
{
unsigned int reg;
__asm__ __volatile__ ("pushfl;"
diff --git a/include/asm-i386/segment.h b/include/asm-i386/segment.h
index 5bdda79..3c796af 100644
--- a/include/asm-i386/segment.h
+++ b/include/asm-i386/segment.h
@@ -131,5 +131,7 @@
#define SEGMENT_LDT 0x4
#define SEGMENT_GDT 0x0
+#ifndef CONFIG_PARAVIRT
#define get_kernel_rpl() 0
#endif
+#endif
diff --git a/include/asm-i386/setup.h b/include/asm-i386/setup.h
index 2734909..9930c5a 100644
--- a/include/asm-i386/setup.h
+++ b/include/asm-i386/setup.h
@@ -70,6 +70,7 @@
struct e820entry;
char * __init machine_specific_memory_setup(void);
+char *memory_setup(void);
int __init copy_e820_map(struct e820entry * biosmap, int nr_map);
int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map);
diff --git a/include/asm-i386/spinlock.h b/include/asm-i386/spinlock.h
index c18b71f..dea6070 100644
--- a/include/asm-i386/spinlock.h
+++ b/include/asm-i386/spinlock.h
@@ -7,8 +7,12 @@
#include <asm/processor.h>
#include <linux/compiler.h>
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
#define CLI_STRING "cli"
#define STI_STRING "sti"
+#endif /* CONFIG_PARAVIRT */
/*
* Your basic SMP spinlocks, allowing only a single CPU anywhere
diff --git a/include/asm-i386/suspend.h b/include/asm-i386/suspend.h
index 08be1e5..3036152 100644
--- a/include/asm-i386/suspend.h
+++ b/include/asm-i386/suspend.h
@@ -23,12 +23,8 @@
struct saved_context {
u16 es, fs, gs, ss;
unsigned long cr0, cr2, cr3, cr4;
- u16 gdt_pad;
- u16 gdt_limit;
- unsigned long gdt_base;
- u16 idt_pad;
- u16 idt_limit;
- unsigned long idt_base;
+ struct Xgt_desc_struct gdt;
+ struct Xgt_desc_struct idt;
u16 ldt;
u16 tss;
unsigned long tr;
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
index a6dabbc..a6d20d9 100644
--- a/include/asm-i386/system.h
+++ b/include/asm-i386/system.h
@@ -88,6 +88,9 @@
#define savesegment(seg, value) \
asm volatile("mov %%" #seg ",%0":"=rm" (value))
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
#define read_cr0() ({ \
unsigned int __dummy; \
__asm__ __volatile__( \
@@ -139,17 +142,18 @@
#define write_cr4(x) \
__asm__ __volatile__("movl %0,%%cr4": :"r" (x))
-/*
- * Clear and set 'TS' bit respectively
- */
+#define wbinvd() \
+ __asm__ __volatile__ ("wbinvd": : :"memory")
+
+/* Clear the 'TS' bit */
#define clts() __asm__ __volatile__ ("clts")
+#endif/* CONFIG_PARAVIRT */
+
+/* Set the 'TS' bit */
#define stts() write_cr0(8 | read_cr0())
#endif /* __KERNEL__ */
-#define wbinvd() \
- __asm__ __volatile__ ("wbinvd": : :"memory")
-
static inline unsigned long get_limit(unsigned long segment)
{
unsigned long __limit;
diff --git a/include/asm-i386/time.h b/include/asm-i386/time.h
new file mode 100644
index 0000000..ea8065a
--- /dev/null
+++ b/include/asm-i386/time.h
@@ -0,0 +1,41 @@
+#ifndef _ASMi386_TIME_H
+#define _ASMi386_TIME_H
+
+#include <linux/efi.h>
+#include "mach_time.h"
+
+static inline unsigned long native_get_wallclock(void)
+{
+ unsigned long retval;
+
+ if (efi_enabled)
+ retval = efi_get_time();
+ else
+ retval = mach_get_cmos_time();
+
+ return retval;
+}
+
+static inline int native_set_wallclock(unsigned long nowtime)
+{
+ int retval;
+
+ if (efi_enabled)
+ retval = efi_set_rtc_mmss(nowtime);
+ else
+ retval = mach_set_rtc_mmss(nowtime);
+
+ return retval;
+}
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else /* !CONFIG_PARAVIRT */
+
+#define get_wallclock() native_get_wallclock()
+#define set_wallclock(x) native_set_wallclock(x)
+#define do_time_init() time_init_hook()
+
+#endif /* CONFIG_PARAVIRT */
+
+#endif