Re: [patch 09/20] XEN-paravirt: dont export paravirt_ops structure, do individual functions
On Fri, 2007-01-12 at 17:45 -0800, Jeremy Fitzhardinge wrote: > Wrap the paravirt_ops members we want to export in wrapper functions. Andrew, the removal of paravirt_ops export here will break kvm. Feel free to re-add "EXPORT_SYMBOL_GPL(paravirt_ops)" at the bottom of arch/i386/kernel/paravirt.c; I'm working on a cleaner way for modules like kvm / lguest (which want to use the native versions directly anyway). Thanks, Rusty. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[patch 09/20] XEN-paravirt: dont export paravirt_ops structure, do individual functions
Wrap the paravirt_ops members we want to export in wrapper functions.
Since we binary-patch the critical ones, this doesn't make a speed
impact.
I moved drm_follow_page into the core, to avoid having to wrap the
various pte ops. Unlining kernel_fpu_end and using that in the RAID6
code would remove the need to export clts/read_cr0/write_cr0 too.
Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>
Signed-off-by: Chris Wright <[EMAIL PROTECTED]>
===
--- a/arch/i386/kernel/paravirt.c
+++ b/arch/i386/kernel/paravirt.c
@@ -596,6 +596,123 @@ static int __init print_banner(void)
return 0;
}
core_initcall(print_banner);
+
+unsigned long paravirt_save_flags(void)
+{
+ return paravirt_ops.save_fl();
+}
+EXPORT_SYMBOL(paravirt_save_flags);
+
+void paravirt_restore_flags(unsigned long flags)
+{
+ paravirt_ops.restore_fl(flags);
+}
+EXPORT_SYMBOL(paravirt_restore_flags);
+
+void paravirt_irq_disable(void)
+{
+ paravirt_ops.irq_disable();
+}
+EXPORT_SYMBOL(paravirt_irq_disable);
+
+void paravirt_irq_enable(void)
+{
+ paravirt_ops.irq_enable();
+}
+EXPORT_SYMBOL(paravirt_irq_enable);
+
+void paravirt_io_delay(void)
+{
+ paravirt_ops.io_delay();
+}
+EXPORT_SYMBOL(paravirt_io_delay);
+
+void paravirt_const_udelay(unsigned long loops)
+{
+ paravirt_ops.const_udelay(loops);
+}
+EXPORT_SYMBOL(paravirt_const_udelay);
+
+u64 paravirt_read_msr(unsigned int msr, int *err)
+{
+ return paravirt_ops.read_msr(msr, err);
+}
+EXPORT_SYMBOL(paravirt_read_msr);
+
+int paravirt_write_msr(unsigned int msr, u64 val)
+{
+ return paravirt_ops.write_msr(msr, val);
+}
+EXPORT_SYMBOL(paravirt_write_msr);
+
+u64 paravirt_read_tsc(void)
+{
+ return paravirt_ops.read_tsc();
+}
+EXPORT_SYMBOL(paravirt_read_tsc);
+
+int paravirt_enabled(void)
+{
+ return paravirt_ops.paravirt_enabled;
+}
+EXPORT_SYMBOL(paravirt_enabled);
+
+void clts(void)
+{
+ paravirt_ops.clts();
+}
+EXPORT_SYMBOL(clts);
+
+unsigned long read_cr0(void)
+{
+ return paravirt_ops.read_cr0();
+}
+EXPORT_SYMBOL_GPL(read_cr0);
+
+void write_cr0(unsigned long cr0)
+{
+ paravirt_ops.write_cr0(cr0);
+}
+EXPORT_SYMBOL_GPL(write_cr0);
+
+void wbinvd(void)
+{
+ paravirt_ops.wbinvd();
+}
+EXPORT_SYMBOL(wbinvd);
+
+void raw_safe_halt(void)
+{
+ paravirt_ops.safe_halt();
+}
+EXPORT_SYMBOL_GPL(raw_safe_halt);
+
+void halt(void)
+{
+ paravirt_ops.safe_halt();
+}
+EXPORT_SYMBOL_GPL(halt);
+
+#ifdef CONFIG_X86_LOCAL_APIC
+void apic_write(unsigned long reg, unsigned long v)
+{
+ paravirt_ops.apic_write(reg,v);
+}
+EXPORT_SYMBOL_GPL(apic_write);
+
+unsigned long apic_read(unsigned long reg)
+{
+ return paravirt_ops.apic_read(reg);
+}
+EXPORT_SYMBOL_GPL(apic_read);
+#endif
+
+void __cpuid(unsigned int *eax, unsigned int *ebx,
+unsigned int *ecx, unsigned int *edx)
+{
+ paravirt_ops.cpuid(eax, ebx, ecx, edx);
+}
+EXPORT_SYMBOL(__cpuid);
/* We simply declare start_kernel to be the paravirt probe of last resort. */
paravirt_probe(start_kernel);
@@ -712,11 +829,3 @@ struct paravirt_ops paravirt_ops = {
.startup_ipi_hook = (void *)native_nop,
};
-
-/*
- * NOTE: CONFIG_PARAVIRT is experimental and the paravirt_ops
- * semantics are subject to change. Hence we only do this
- * internal-only export of this, until it gets sorted out and
- * all lowlevel CPU ops used by modules are separately exported.
- */
-EXPORT_SYMBOL_GPL(paravirt_ops);
===
--- a/include/asm-i386/delay.h
+++ b/include/asm-i386/delay.h
@@ -17,9 +17,9 @@ extern void __delay(unsigned long loops)
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 udelay(n) paravirt_const_udelay((n) * 0x10c7ul)
-#define ndelay(n) paravirt_ops.const_udelay((n) * 5ul)
+#define ndelay(n) paravirt_const_udelay((n) * 5ul)
#else /* !PARAVIRT || USE_REAL_TIME_DELAY */
===
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -218,8 +218,6 @@ fastcall pgd_t native_make_pgd(unsigned
fastcall pgd_t native_make_pgd(unsigned long pgd);
#endif
-#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
-
static inline void load_esp0(struct tss_struct *tss,
struct thread_struct *thread)
{
@@ -243,11 +241,8 @@ static inline void do_time_init(void)
}
/* 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);
-}
+void __cpuid(unsigned int *eax, unsigned int *ebx,
+unsigned int *ecx, unsigned int *edx);
/*
* These special macros can be used to get or set a debugging register
[patch 09/20] XEN-paravirt: dont export paravirt_ops structure, do individual functions
Wrap the paravirt_ops members we want to export in wrapper functions.
Since we binary-patch the critical ones, this doesn't make a speed
impact.
I moved drm_follow_page into the core, to avoid having to wrap the
various pte ops. Unlining kernel_fpu_end and using that in the RAID6
code would remove the need to export clts/read_cr0/write_cr0 too.
Signed-off-by: Rusty Russell [EMAIL PROTECTED]
Signed-off-by: Chris Wright [EMAIL PROTECTED]
===
--- a/arch/i386/kernel/paravirt.c
+++ b/arch/i386/kernel/paravirt.c
@@ -596,6 +596,123 @@ static int __init print_banner(void)
return 0;
}
core_initcall(print_banner);
+
+unsigned long paravirt_save_flags(void)
+{
+ return paravirt_ops.save_fl();
+}
+EXPORT_SYMBOL(paravirt_save_flags);
+
+void paravirt_restore_flags(unsigned long flags)
+{
+ paravirt_ops.restore_fl(flags);
+}
+EXPORT_SYMBOL(paravirt_restore_flags);
+
+void paravirt_irq_disable(void)
+{
+ paravirt_ops.irq_disable();
+}
+EXPORT_SYMBOL(paravirt_irq_disable);
+
+void paravirt_irq_enable(void)
+{
+ paravirt_ops.irq_enable();
+}
+EXPORT_SYMBOL(paravirt_irq_enable);
+
+void paravirt_io_delay(void)
+{
+ paravirt_ops.io_delay();
+}
+EXPORT_SYMBOL(paravirt_io_delay);
+
+void paravirt_const_udelay(unsigned long loops)
+{
+ paravirt_ops.const_udelay(loops);
+}
+EXPORT_SYMBOL(paravirt_const_udelay);
+
+u64 paravirt_read_msr(unsigned int msr, int *err)
+{
+ return paravirt_ops.read_msr(msr, err);
+}
+EXPORT_SYMBOL(paravirt_read_msr);
+
+int paravirt_write_msr(unsigned int msr, u64 val)
+{
+ return paravirt_ops.write_msr(msr, val);
+}
+EXPORT_SYMBOL(paravirt_write_msr);
+
+u64 paravirt_read_tsc(void)
+{
+ return paravirt_ops.read_tsc();
+}
+EXPORT_SYMBOL(paravirt_read_tsc);
+
+int paravirt_enabled(void)
+{
+ return paravirt_ops.paravirt_enabled;
+}
+EXPORT_SYMBOL(paravirt_enabled);
+
+void clts(void)
+{
+ paravirt_ops.clts();
+}
+EXPORT_SYMBOL(clts);
+
+unsigned long read_cr0(void)
+{
+ return paravirt_ops.read_cr0();
+}
+EXPORT_SYMBOL_GPL(read_cr0);
+
+void write_cr0(unsigned long cr0)
+{
+ paravirt_ops.write_cr0(cr0);
+}
+EXPORT_SYMBOL_GPL(write_cr0);
+
+void wbinvd(void)
+{
+ paravirt_ops.wbinvd();
+}
+EXPORT_SYMBOL(wbinvd);
+
+void raw_safe_halt(void)
+{
+ paravirt_ops.safe_halt();
+}
+EXPORT_SYMBOL_GPL(raw_safe_halt);
+
+void halt(void)
+{
+ paravirt_ops.safe_halt();
+}
+EXPORT_SYMBOL_GPL(halt);
+
+#ifdef CONFIG_X86_LOCAL_APIC
+void apic_write(unsigned long reg, unsigned long v)
+{
+ paravirt_ops.apic_write(reg,v);
+}
+EXPORT_SYMBOL_GPL(apic_write);
+
+unsigned long apic_read(unsigned long reg)
+{
+ return paravirt_ops.apic_read(reg);
+}
+EXPORT_SYMBOL_GPL(apic_read);
+#endif
+
+void __cpuid(unsigned int *eax, unsigned int *ebx,
+unsigned int *ecx, unsigned int *edx)
+{
+ paravirt_ops.cpuid(eax, ebx, ecx, edx);
+}
+EXPORT_SYMBOL(__cpuid);
/* We simply declare start_kernel to be the paravirt probe of last resort. */
paravirt_probe(start_kernel);
@@ -712,11 +829,3 @@ struct paravirt_ops paravirt_ops = {
.startup_ipi_hook = (void *)native_nop,
};
-
-/*
- * NOTE: CONFIG_PARAVIRT is experimental and the paravirt_ops
- * semantics are subject to change. Hence we only do this
- * internal-only export of this, until it gets sorted out and
- * all lowlevel CPU ops used by modules are separately exported.
- */
-EXPORT_SYMBOL_GPL(paravirt_ops);
===
--- a/include/asm-i386/delay.h
+++ b/include/asm-i386/delay.h
@@ -17,9 +17,9 @@ extern void __delay(unsigned long loops)
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 udelay(n) paravirt_const_udelay((n) * 0x10c7ul)
-#define ndelay(n) paravirt_ops.const_udelay((n) * 5ul)
+#define ndelay(n) paravirt_const_udelay((n) * 5ul)
#else /* !PARAVIRT || USE_REAL_TIME_DELAY */
===
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -218,8 +218,6 @@ fastcall pgd_t native_make_pgd(unsigned
fastcall pgd_t native_make_pgd(unsigned long pgd);
#endif
-#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
-
static inline void load_esp0(struct tss_struct *tss,
struct thread_struct *thread)
{
@@ -243,11 +241,8 @@ static inline void do_time_init(void)
}
/* 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);
-}
+void __cpuid(unsigned int *eax, unsigned int *ebx,
+unsigned int *ecx, unsigned int *edx);
/*
* These special macros can be used to get or set a debugging register
@@
Re: [patch 09/20] XEN-paravirt: dont export paravirt_ops structure, do individual functions
On Fri, 2007-01-12 at 17:45 -0800, Jeremy Fitzhardinge wrote: Wrap the paravirt_ops members we want to export in wrapper functions. Andrew, the removal of paravirt_ops export here will break kvm. Feel free to re-add EXPORT_SYMBOL_GPL(paravirt_ops) at the bottom of arch/i386/kernel/paravirt.c; I'm working on a cleaner way for modules like kvm / lguest (which want to use the native versions directly anyway). Thanks, Rusty. - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
