paravirt: refactor struct paravirt_ops into smaller pv_*_ops

This patch refactors the paravirt_ops structure into groups of
functionally related ops:

pv_info - random info, rather than function entrypoints
pv_init_ops - functions used at boot time (some for module_init too)
pv_misc_ops - lazy mode, which didn't fit well anywhere else
pv_time_ops - time-related functions
pv_cpu_ops - various privileged instruction ops
pv_irq_ops - operations for managing interrupt state
pv_apic_ops - APIC operations
pv_mmu_ops - operations for managing pagetables

There are several motivations for this:

1. Some of these ops will be general to all x86, and some will be
   i386/x86-64 specific.  This makes it easier to share common stuff
   while allowing separate implementations where needed.

2. At the moment we must export all of paravirt_ops, but modules only
   need selected parts of it.  This allows us to export on a case by case
   basis (and also choose which export license we want to apply).

3. Functional groupings make things a bit more readable.

Struct paravirt_ops is now only used as a template to generate
patch-site identifiers, and to extract function pointers for inserting
into jmp/calls when patching.  It is only instantiated when needed.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
Cc: Zach Amsden <zach@vmware.com>
Cc: Avi Kivity <avi@qumranet.com>
Cc: Anthony Liguory <aliguori@us.ibm.com>
Cc: "Glauber de Oliveira Costa" <glommer@gmail.com>
Cc: Jun Nakajima <jun.nakajima@intel.com>

arch/x86/kernel/alternative.c

@@ -368,8 +368,8 @@ void apply_paravirt(struct paravirt_patch_site *start,
 		BUG_ON(p->len > MAX_PATCH_LEN);
 		/* prep the buffer with the original instructions */
 		memcpy(insnbuf, p->instr, p->len);
-		used = paravirt_ops.patch(p->instrtype, p->clobbers, insnbuf,
-					  (unsigned long)p->instr, p->len);
+		used = pv_init_ops.patch(p->instrtype, p->clobbers, insnbuf,
+					 (unsigned long)p->instr, p->len);
 
 		BUG_ON(used > p->len);
 

arch/x86/kernel/asm-offsets_32.c

@@ -116,12 +116,14 @@ void foo(void)
 
 #ifdef CONFIG_PARAVIRT
 	BLANK();
-	OFFSET(PARAVIRT_enabled, paravirt_ops, paravirt_enabled);
-	OFFSET(PARAVIRT_irq_disable, paravirt_ops, irq_disable);
-	OFFSET(PARAVIRT_irq_enable, paravirt_ops, irq_enable);
-	OFFSET(PARAVIRT_irq_enable_sysexit, paravirt_ops, irq_enable_sysexit);
-	OFFSET(PARAVIRT_iret, paravirt_ops, iret);
-	OFFSET(PARAVIRT_read_cr0, paravirt_ops, read_cr0);
+	OFFSET(PARAVIRT_enabled, pv_info, paravirt_enabled);
+	OFFSET(PARAVIRT_PATCH_pv_cpu_ops, paravirt_patch_template, pv_cpu_ops);
+	OFFSET(PARAVIRT_PATCH_pv_irq_ops, paravirt_patch_template, pv_irq_ops);
+	OFFSET(PV_IRQ_irq_disable, pv_irq_ops, irq_disable);
+	OFFSET(PV_IRQ_irq_enable, pv_irq_ops, irq_enable);
+	OFFSET(PV_CPU_iret, pv_cpu_ops, iret);
+	OFFSET(PV_CPU_irq_enable_sysexit, pv_cpu_ops, irq_enable_sysexit);
+	OFFSET(PV_CPU_read_cr0, pv_cpu_ops, read_cr0);
 #endif
 
 #ifdef CONFIG_XEN

arch/x86/kernel/entry_32.S

@@ -434,7 +434,7 @@ ldt_ss:
 	 * is still available to implement the setting of the high
 	 * 16-bits in the INTERRUPT_RETURN paravirt-op.
 	 */
-	cmpl $0, paravirt_ops+PARAVIRT_enabled
+	cmpl $0, pv_info+PARAVIRT_enabled
 	jne restore_nocheck
 #endif
 

arch/x86/kernel/paravirt_32.c

@@ -42,32 +42,33 @@ void _paravirt_nop(void)
 static void __init default_banner(void)
 {
 	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
-	       paravirt_ops.name);
+	       pv_info.name);
 }
 
 char *memory_setup(void)
 {
-	return paravirt_ops.memory_setup();
+	return pv_init_ops.memory_setup();
 }
 
 /* Simple instruction patching code. */
-#define DEF_NATIVE(name, code)					\
-	extern const char start_##name[], end_##name[];		\
-	asm("start_" #name ": " code "; end_" #name ":")
-
-DEF_NATIVE(irq_disable, "cli");
-DEF_NATIVE(irq_enable, "sti");
-DEF_NATIVE(restore_fl, "push %eax; popf");
-DEF_NATIVE(save_fl, "pushf; pop %eax");
-DEF_NATIVE(iret, "iret");
-DEF_NATIVE(irq_enable_sysexit, "sti; sysexit");
-DEF_NATIVE(read_cr2, "mov %cr2, %eax");
-DEF_NATIVE(write_cr3, "mov %eax, %cr3");
-DEF_NATIVE(read_cr3, "mov %cr3, %eax");
-DEF_NATIVE(clts, "clts");
-DEF_NATIVE(read_tsc, "rdtsc");
-
-DEF_NATIVE(ud2a, "ud2a");
+#define DEF_NATIVE(ops, name, code)					\
+	extern const char start_##ops##_##name[], end_##ops##_##name[];	\
+	asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
+
+DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
+DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
+DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf");
+DEF_NATIVE(pv_irq_ops, save_fl, "pushf; pop %eax");
+DEF_NATIVE(pv_cpu_ops, iret, "iret");
+DEF_NATIVE(pv_cpu_ops, irq_enable_sysexit, "sti; sysexit");
+DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax");
+DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3");
+DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax");
+DEF_NATIVE(pv_cpu_ops, clts, "clts");
+DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc");
+
+/* Undefined instruction for dealing with missing ops pointers. */
+static const unsigned char ud2a[] = { 0x0f, 0x0b };
 
 static unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
 			     unsigned long addr, unsigned len)
@@ -76,37 +77,29 @@ static unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
 	unsigned ret;
 
 	switch(type) {
-#define SITE(x)	case PARAVIRT_PATCH(x):	start = start_##x; end = end_##x; goto patch_site
-		SITE(irq_disable);
-		SITE(irq_enable);
-		SITE(restore_fl);
-		SITE(save_fl);
-		SITE(iret);
-		SITE(irq_enable_sysexit);
-		SITE(read_cr2);
-		SITE(read_cr3);
-		SITE(write_cr3);
-		SITE(clts);
-		SITE(read_tsc);
+#define SITE(ops, x)						\
+	case PARAVIRT_PATCH(ops.x):				\
+		start = start_##ops##_##x;			\
+		end = end_##ops##_##x;				\
+		goto patch_site
+
+	SITE(pv_irq_ops, irq_disable);
+	SITE(pv_irq_ops, irq_enable);
+	SITE(pv_irq_ops, restore_fl);
+	SITE(pv_irq_ops, save_fl);
+	SITE(pv_cpu_ops, iret);
+	SITE(pv_cpu_ops, irq_enable_sysexit);
+	SITE(pv_mmu_ops, read_cr2);
+	SITE(pv_mmu_ops, read_cr3);
+	SITE(pv_mmu_ops, write_cr3);
+	SITE(pv_cpu_ops, clts);
+	SITE(pv_cpu_ops, read_tsc);
 #undef SITE
 
 	patch_site:
 		ret = paravirt_patch_insns(ibuf, len, start, end);
 		break;
 
-	case PARAVIRT_PATCH(make_pgd):
-	case PARAVIRT_PATCH(make_pte):
-	case PARAVIRT_PATCH(pgd_val):
-	case PARAVIRT_PATCH(pte_val):
-#ifdef CONFIG_X86_PAE
-	case PARAVIRT_PATCH(make_pmd):
-	case PARAVIRT_PATCH(pmd_val):
-#endif
-		/* These functions end up returning exactly what
-		   they're passed, in the same registers. */
-		ret = paravirt_patch_nop();
-		break;
-
 	default:
 		ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
 		break;
@@ -150,7 +143,7 @@ unsigned paravirt_patch_call(void *insnbuf,
 	return 5;
 }
 
-unsigned paravirt_patch_jmp(const void *target, void *insnbuf,
+unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
 			    unsigned long addr, unsigned len)
 {
 	struct branch *b = insnbuf;
@@ -165,22 +158,38 @@ unsigned paravirt_patch_jmp(const void *target, void *insnbuf,
 	return 5;
 }
 
+/* Neat trick to map patch type back to the call within the
+ * corresponding structure. */
+static void *get_call_destination(u8 type)
+{
+	struct paravirt_patch_template tmpl = {
+		.pv_init_ops = pv_init_ops,
+		.pv_misc_ops = pv_misc_ops,
+		.pv_time_ops = pv_time_ops,
+		.pv_cpu_ops = pv_cpu_ops,
+		.pv_irq_ops = pv_irq_ops,
+		.pv_apic_ops = pv_apic_ops,
+		.pv_mmu_ops = pv_mmu_ops,
+	};
+	return *((void **)&tmpl + type);
+}
+
 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
 				unsigned long addr, unsigned len)
 {
-	void *opfunc = *((void **)&paravirt_ops + type);
+	void *opfunc = get_call_destination(type);
 	unsigned ret;
 
 	if (opfunc == NULL)
 		/* If there's no function, patch it with a ud2a (BUG) */
-		ret = paravirt_patch_insns(insnbuf, len, start_ud2a, end_ud2a);
+		ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a));
 	else if (opfunc == paravirt_nop)
 		/* If the operation is a nop, then nop the callsite */
 		ret = paravirt_patch_nop();
-	else if (type == PARAVIRT_PATCH(iret) ||
-		 type == PARAVIRT_PATCH(irq_enable_sysexit))
+	else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) ||
+		 type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit))
 		/* If operation requires a jmp, then jmp */
-		ret = paravirt_patch_jmp(opfunc, insnbuf, addr, len);
+		ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
 	else
 		/* Otherwise call the function; assume target could
 		   clobber any caller-save reg */
@@ -205,7 +214,7 @@ unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
 
 void init_IRQ(void)
 {
-	paravirt_ops.init_IRQ();
+	pv_irq_ops.init_IRQ();
 }
 
 static void native_flush_tlb(void)
@@ -233,7 +242,7 @@ extern void native_irq_enable_sysexit(void);
 
 static int __init print_banner(void)
 {
-	paravirt_ops.banner();
+	pv_init_ops.banner();
 	return 0;
 }
 core_initcall(print_banner);
@@ -273,47 +282,53 @@ int paravirt_disable_iospace(void)
 	return ret;
 }
 
-struct paravirt_ops paravirt_ops = {
+struct pv_info pv_info = {
 	.name = "bare hardware",
 	.paravirt_enabled = 0,
 	.kernel_rpl = 0,
 	.shared_kernel_pmd = 1,	/* Only used when CONFIG_X86_PAE is set */
+};
 
- 	.patch = native_patch,
+struct pv_init_ops pv_init_ops = {
+	.patch = native_patch,
 	.banner = default_banner,
 	.arch_setup = paravirt_nop,
 	.memory_setup = machine_specific_memory_setup,
+};
+
+struct pv_time_ops pv_time_ops = {
+	.time_init = hpet_time_init,
 	.get_wallclock = native_get_wallclock,
 	.set_wallclock = native_set_wallclock,
-	.time_init = hpet_time_init,
+	.sched_clock = native_sched_clock,
+	.get_cpu_khz = native_calculate_cpu_khz,
+};
+
+struct pv_irq_ops pv_irq_ops = {
 	.init_IRQ = native_init_IRQ,
+	.save_fl = native_save_fl,
+	.restore_fl = native_restore_fl,
+	.irq_disable = native_irq_disable,
+	.irq_enable = native_irq_enable,
+	.safe_halt = native_safe_halt,
+	.halt = native_halt,
+};
 
+struct pv_cpu_ops pv_cpu_ops = {
 	.cpuid = native_cpuid,
 	.get_debugreg = native_get_debugreg,
 	.set_debugreg = native_set_debugreg,
 	.clts = native_clts,
 	.read_cr0 = native_read_cr0,
 	.write_cr0 = native_write_cr0,
-	.read_cr2 = native_read_cr2,
-	.write_cr2 = native_write_cr2,
-	.read_cr3 = native_read_cr3,
-	.write_cr3 = native_write_cr3,
 	.read_cr4 = native_read_cr4,
 	.read_cr4_safe = native_read_cr4_safe,
 	.write_cr4 = native_write_cr4,
-	.save_fl = native_save_fl,
-	.restore_fl = native_restore_fl,
-	.irq_disable = native_irq_disable,
-	.irq_enable = native_irq_enable,
-	.safe_halt = native_safe_halt,
-	.halt = native_halt,
 	.wbinvd = native_wbinvd,
 	.read_msr = native_read_msr_safe,
 	.write_msr = native_write_msr_safe,
 	.read_tsc = native_read_tsc,
 	.read_pmc = native_read_pmc,
-	.sched_clock = native_sched_clock,
-	.get_cpu_khz = native_calculate_cpu_khz,
 	.load_tr_desc = native_load_tr_desc,
 	.set_ldt = native_set_ldt,
 	.load_gdt = native_load_gdt,
@@ -327,9 +342,14 @@ struct paravirt_ops paravirt_ops = {
 	.write_idt_entry = write_dt_entry,
 	.load_esp0 = native_load_esp0,
 
+	.irq_enable_sysexit = native_irq_enable_sysexit,
+	.iret = native_iret,
+
 	.set_iopl_mask = native_set_iopl_mask,
 	.io_delay = native_io_delay,
+};
 
+struct pv_apic_ops pv_apic_ops = {
 #ifdef CONFIG_X86_LOCAL_APIC
 	.apic_write = native_apic_write,
 	.apic_write_atomic = native_apic_write_atomic,
@@ -338,11 +358,21 @@ struct paravirt_ops paravirt_ops = {
 	.setup_secondary_clock = setup_secondary_APIC_clock,
 	.startup_ipi_hook = paravirt_nop,
 #endif
+};
+
+struct pv_misc_ops pv_misc_ops = {
 	.set_lazy_mode = paravirt_nop,
+};
 
+struct pv_mmu_ops pv_mmu_ops = {
 	.pagetable_setup_start = native_pagetable_setup_start,
 	.pagetable_setup_done = native_pagetable_setup_done,
 
+	.read_cr2 = native_read_cr2,
+	.write_cr2 = native_write_cr2,
+	.read_cr3 = native_read_cr3,
+	.write_cr3 = native_write_cr3,
+
 	.flush_tlb_user = native_flush_tlb,
 	.flush_tlb_kernel = native_flush_tlb_global,
 	.flush_tlb_single = native_flush_tlb_single,
@@ -381,12 +411,14 @@ struct paravirt_ops paravirt_ops = {
 	.make_pte = native_make_pte,
 	.make_pgd = native_make_pgd,
 
-	.irq_enable_sysexit = native_irq_enable_sysexit,
-	.iret = native_iret,
-
 	.dup_mmap = paravirt_nop,
 	.exit_mmap = paravirt_nop,
 	.activate_mm = paravirt_nop,
 };
 
-EXPORT_SYMBOL(paravirt_ops);
+EXPORT_SYMBOL_GPL(pv_time_ops);
+EXPORT_SYMBOL_GPL(pv_cpu_ops);
+EXPORT_SYMBOL_GPL(pv_mmu_ops);
+EXPORT_SYMBOL_GPL(pv_apic_ops);
+EXPORT_SYMBOL_GPL(pv_info);
+EXPORT_SYMBOL    (pv_irq_ops);

arch/x86/kernel/vmi_32.c

@@ -134,21 +134,21 @@ static unsigned vmi_patch(u8 type, u16 clobbers, void *insns,
 			  unsigned long eip, unsigned len)
 {
 	switch (type) {
-		case PARAVIRT_PATCH(irq_disable):
+		case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
 			return patch_internal(VMI_CALL_DisableInterrupts, len,
 					      insns, eip);
-		case PARAVIRT_PATCH(irq_enable):
+		case PARAVIRT_PATCH(pv_irq_ops.irq_enable):
 			return patch_internal(VMI_CALL_EnableInterrupts, len,
 					      insns, eip);
-		case PARAVIRT_PATCH(restore_fl):
+		case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
 			return patch_internal(VMI_CALL_SetInterruptMask, len,
 					      insns, eip);
-		case PARAVIRT_PATCH(save_fl):
+		case PARAVIRT_PATCH(pv_irq_ops.save_fl):
 			return patch_internal(VMI_CALL_GetInterruptMask, len,
 					      insns, eip);
-		case PARAVIRT_PATCH(iret):
+		case PARAVIRT_PATCH(pv_cpu_ops.iret):
 			return patch_internal(VMI_CALL_IRET, len, insns, eip);
-		case PARAVIRT_PATCH(irq_enable_sysexit):
+		case PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit):
 			return patch_internal(VMI_CALL_SYSEXIT, len, insns, eip);
 		default:
 			break;
@@ -690,9 +690,9 @@ do {								\
 	reloc = call_vrom_long_func(vmi_rom, get_reloc,		\
 				    VMI_CALL_##vmicall);	\
 	if (rel->type == VMI_RELOCATION_CALL_REL) 		\
-		paravirt_ops.opname = (void *)rel->eip;		\
+		opname = (void *)rel->eip;			\
 	else if (rel->type == VMI_RELOCATION_NOP) 		\
-		paravirt_ops.opname = (void *)vmi_nop;		\
+		opname = (void *)vmi_nop;			\
 	else if (rel->type != VMI_RELOCATION_NONE)		\
 		printk(KERN_WARNING "VMI: Unknown relocation "	\
 				    "type %d for " #vmicall"\n",\
@@ -712,7 +712,7 @@ do {								\
 				    VMI_CALL_##vmicall);	\
 	BUG_ON(rel->type == VMI_RELOCATION_JUMP_REL);		\
 	if (rel->type == VMI_RELOCATION_CALL_REL) {		\
-		paravirt_ops.opname = wrapper;			\
+		opname = wrapper;				\
 		vmi_ops.cache = (void *)rel->eip;		\
 	}							\
 } while (0)
@@ -732,11 +732,11 @@ static inline int __init activate_vmi(void)
 	}
 	savesegment(cs, kernel_cs);
 
-	paravirt_ops.paravirt_enabled = 1;
-	paravirt_ops.kernel_rpl = kernel_cs & SEGMENT_RPL_MASK;
+	pv_info.paravirt_enabled = 1;
+	pv_info.kernel_rpl = kernel_cs & SEGMENT_RPL_MASK;
+	pv_info.name = "vmi";
 
-	paravirt_ops.patch = vmi_patch;
-	paravirt_ops.name = "vmi";
+	pv_init_ops.patch = vmi_patch;
 
 	/*
 	 * Many of these operations are ABI compatible with VMI.
@@ -754,26 +754,26 @@ static inline int __init activate_vmi(void)
 	 */
 
 	/* CPUID is special, so very special it gets wrapped like a present */
-	para_wrap(cpuid, vmi_cpuid, cpuid, CPUID);
-
-	para_fill(clts, CLTS);
-	para_fill(get_debugreg, GetDR);
-	para_fill(set_debugreg, SetDR);
-	para_fill(read_cr0, GetCR0);
-	para_fill(read_cr2, GetCR2);
-	para_fill(read_cr3, GetCR3);
-	para_fill(read_cr4, GetCR4);
-	para_fill(write_cr0, SetCR0);
-	para_fill(write_cr2, SetCR2);
-	para_fill(write_cr3, SetCR3);
-	para_fill(write_cr4, SetCR4);
-	para_fill(save_fl, GetInterruptMask);
-	para_fill(restore_fl, SetInterruptMask);
-	para_fill(irq_disable, DisableInterrupts);
-	para_fill(irq_enable, EnableInterrupts);
-
-	para_fill(wbinvd, WBINVD);
-	para_fill(read_tsc, RDTSC);
+	para_wrap(pv_cpu_ops.cpuid, vmi_cpuid, cpuid, CPUID);
+
+	para_fill(pv_cpu_ops.clts, CLTS);
+	para_fill(pv_cpu_ops.get_debugreg, GetDR);
+	para_fill(pv_cpu_ops.set_debugreg, SetDR);
+	para_fill(pv_cpu_ops.read_cr0, GetCR0);
+	para_fill(pv_mmu_ops.read_cr2, GetCR2);
+	para_fill(pv_mmu_ops.read_cr3, GetCR3);
+	para_fill(pv_cpu_ops.read_cr4, GetCR4);
+	para_fill(pv_cpu_ops.write_cr0, SetCR0);
+	para_fill(pv_mmu_ops.write_cr2, SetCR2);
+	para_fill(pv_mmu_ops.write_cr3, SetCR3);
+	para_fill(pv_cpu_ops.write_cr4, SetCR4);
+	para_fill(pv_irq_ops.save_fl, GetInterruptMask);
+	para_fill(pv_irq_ops.restore_fl, SetInterruptMask);
+	para_fill(pv_irq_ops.irq_disable, DisableInterrupts);
+	para_fill(pv_irq_ops.irq_enable, EnableInterrupts);
+
+	para_fill(pv_cpu_ops.wbinvd, WBINVD);
+	para_fill(pv_cpu_ops.read_tsc, RDTSC);
 
 	/* The following we emulate with trap and emulate for now */
 	/* paravirt_ops.read_msr = vmi_rdmsr */
@@ -781,29 +781,29 @@ static inline int __init activate_vmi(void)
 	/* paravirt_ops.rdpmc = vmi_rdpmc */
 
 	/* TR interface doesn't pass TR value, wrap */
-	para_wrap(load_tr_desc, vmi_set_tr, set_tr, SetTR);
+	para_wrap(pv_cpu_ops.load_tr_desc, vmi_set_tr, set_tr, SetTR);
 
 	/* LDT is special, too */
-	para_wrap(set_ldt, vmi_set_ldt, _set_ldt, SetLDT);
-
-	para_fill(load_gdt, SetGDT);
-	para_fill(load_idt, SetIDT);
-	para_fill(store_gdt, GetGDT);
-	para_fill(store_idt, GetIDT);
-	para_fill(store_tr, GetTR);
-	paravirt_ops.load_tls = vmi_load_tls;
-	para_fill(write_ldt_entry, WriteLDTEntry);
-	para_fill(write_gdt_entry, WriteGDTEntry);
-	para_fill(write_idt_entry, WriteIDTEntry);
-	para_wrap(load_esp0, vmi_load_esp0, set_kernel_stack, UpdateKernelStack);
-	para_fill(set_iopl_mask, SetIOPLMask);
-	para_fill(io_delay, IODelay);
-	para_wrap(set_lazy_mode, vmi_set_lazy_mode, set_lazy_mode, SetLazyMode);
+	para_wrap(pv_cpu_ops.set_ldt, vmi_set_ldt, _set_ldt, SetLDT);
+
+	para_fill(pv_cpu_ops.load_gdt, SetGDT);
+	para_fill(pv_cpu_ops.load_idt, SetIDT);
+	para_fill(pv_cpu_ops.store_gdt, GetGDT);
+	para_fill(pv_cpu_ops.store_idt, GetIDT);
+	para_fill(pv_cpu_ops.store_tr, GetTR);
+	pv_cpu_ops.load_tls = vmi_load_tls;
+	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.load_esp0, vmi_load_esp0, set_kernel_stack, UpdateKernelStack);
+	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
+	para_fill(pv_cpu_ops.io_delay, IODelay);
+	para_wrap(pv_misc_ops.set_lazy_mode, vmi_set_lazy_mode, set_lazy_mode, SetLazyMode);
 
 	/* user and kernel flush are just handled with different flags to FlushTLB */
-	para_wrap(flush_tlb_user, vmi_flush_tlb_user, _flush_tlb, FlushTLB);
-	para_wrap(flush_tlb_kernel, vmi_flush_tlb_kernel, _flush_tlb, FlushTLB);
-	para_fill(flush_tlb_single, InvalPage);
+	para_wrap(pv_mmu_ops.flush_tlb_user, vmi_flush_tlb_user, _flush_tlb, FlushTLB);
+	para_wrap(pv_mmu_ops.flush_tlb_kernel, vmi_flush_tlb_kernel, _flush_tlb, FlushTLB);
+	para_fill(pv_mmu_ops.flush_tlb_single, InvalPage);
 
 	/*
 	 * Until a standard flag format can be agreed on, we need to
@@ -819,41 +819,41 @@ static inline int __init activate_vmi(void)
 #endif
 
 	if (vmi_ops.set_pte) {
-		paravirt_ops.set_pte = vmi_set_pte;
-		paravirt_ops.set_pte_at = vmi_set_pte_at;
-		paravirt_ops.set_pmd = vmi_set_pmd;
+		pv_mmu_ops.set_pte = vmi_set_pte;
+		pv_mmu_ops.set_pte_at = vmi_set_pte_at;
+		pv_mmu_ops.set_pmd = vmi_set_pmd;
 #ifdef CONFIG_X86_PAE
-		paravirt_ops.set_pte_atomic = vmi_set_pte_atomic;
-		paravirt_ops.set_pte_present = vmi_set_pte_present;
-		paravirt_ops.set_pud = vmi_set_pud;
-		paravirt_ops.pte_clear = vmi_pte_clear;
-		paravirt_ops.pmd_clear = vmi_pmd_clear;
+		pv_mmu_ops.set_pte_atomic = vmi_set_pte_atomic;
+		pv_mmu_ops.set_pte_present = vmi_set_pte_present;
+		pv_mmu_ops.set_pud = vmi_set_pud;
+		pv_mmu_ops.pte_clear = vmi_pte_clear;
+		pv_mmu_ops.pmd_clear = vmi_pmd_clear;
 #endif
 	}
 
 	if (vmi_ops.update_pte) {
-		paravirt_ops.pte_update = vmi_update_pte;
-		paravirt_ops.pte_update_defer = vmi_update_pte_defer;
+		pv_mmu_ops.pte_update = vmi_update_pte;
+		pv_mmu_ops.pte_update_defer = vmi_update_pte_defer;
 	}
 
 	vmi_ops.allocate_page = vmi_get_function(VMI_CALL_AllocatePage);
 	if (vmi_ops.allocate_page) {
-		paravirt_ops.alloc_pt = vmi_allocate_pt;
-		paravirt_ops.alloc_pd = vmi_allocate_pd;
-		paravirt_ops.alloc_pd_clone = vmi_allocate_pd_clone;
+		pv_mmu_ops.alloc_pt = vmi_allocate_pt;
+		pv_mmu_ops.alloc_pd = vmi_allocate_pd;
+		pv_mmu_ops.alloc_pd_clone = vmi_allocate_pd_clone;
 	}
 
 	vmi_ops.release_page = vmi_get_function(VMI_CALL_ReleasePage);
 	if (vmi_ops.release_page) {
-		paravirt_ops.release_pt = vmi_release_pt;
-		paravirt_ops.release_pd = vmi_release_pd;
+		pv_mmu_ops.release_pt = vmi_release_pt;
+		pv_mmu_ops.release_pd = vmi_release_pd;
 	}
 
 	/* Set linear is needed in all cases */
 	vmi_ops.set_linear_mapping = vmi_get_function(VMI_CALL_SetLinearMapping);
 #ifdef CONFIG_HIGHPTE
 	if (vmi_ops.set_linear_mapping)
-		paravirt_ops.kmap_atomic_pte = vmi_kmap_atomic_pte;
+		pv_mmu_ops.kmap_atomic_pte = vmi_kmap_atomic_pte;
 #endif
 
 	/*
@@ -863,17 +863,17 @@ static inline int __init activate_vmi(void)
 	 * the backend.  They are performance critical anyway, so requiring
 	 * a patch is not a big problem.
 	 */
-	paravirt_ops.irq_enable_sysexit = (void *)0xfeedbab0;
-	paravirt_ops.iret = (void *)0xbadbab0;
+	pv_cpu_ops.irq_enable_sysexit = (void *)0xfeedbab0;
+	pv_cpu_ops.iret = (void *)0xbadbab0;
 
 #ifdef CONFIG_SMP
-	para_wrap(startup_ipi_hook, vmi_startup_ipi_hook, set_initial_ap_state, SetInitialAPState);
+	para_wrap(pv_apic_ops.startup_ipi_hook, vmi_startup_ipi_hook, set_initial_ap_state, SetInitialAPState);
 #endif
 
 #ifdef CONFIG_X86_LOCAL_APIC
-	para_fill(apic_read, APICRead);
-	para_fill(apic_write, APICWrite);
-	para_fill(apic_write_atomic, APICWrite);
+	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);
 #endif
 
 	/*
@@ -891,15 +891,15 @@ static inline int __init activate_vmi(void)
 		vmi_timer_ops.set_alarm = vmi_get_function(VMI_CALL_SetAlarm);
 		vmi_timer_ops.cancel_alarm =
 			 vmi_get_function(VMI_CALL_CancelAlarm);
-		paravirt_ops.time_init = vmi_time_init;
-		paravirt_ops.get_wallclock = vmi_get_wallclock;
-		paravirt_ops.set_wallclock = vmi_set_wallclock;
+		pv_time_ops.time_init = vmi_time_init;
+		pv_time_ops.get_wallclock = vmi_get_wallclock;
+		pv_time_ops.set_wallclock = vmi_set_wallclock;
 #ifdef CONFIG_X86_LOCAL_APIC
-		paravirt_ops.setup_boot_clock = vmi_time_bsp_init;
-		paravirt_ops.setup_secondary_clock = vmi_time_ap_init;
+		pv_apic_ops.setup_boot_clock = vmi_time_bsp_init;
+		pv_apic_ops.setup_secondary_clock = vmi_time_ap_init;
 #endif
-		paravirt_ops.sched_clock = vmi_sched_clock;
- 		paravirt_ops.get_cpu_khz = vmi_cpu_khz;
+		pv_time_ops.sched_clock = vmi_sched_clock;
+ 		pv_time_ops.get_cpu_khz = vmi_cpu_khz;
 
 		/* We have true wallclock functions; disable CMOS clock sync */
 		no_sync_cmos_clock = 1;
@@ -908,7 +908,7 @@ static inline int __init activate_vmi(void)
 		disable_vmi_timer = 1;
 	}
 
-	para_fill(safe_halt, Halt);
+	para_fill(pv_irq_ops.safe_halt, Halt);
 
 	/*
 	 * Alternative instruction rewriting doesn't happen soon enough

arch/x86/xen/enlighten.c

@@ -124,7 +124,7 @@ static void __init xen_vcpu_setup(int cpu)
 static void __init xen_banner(void)
 {
 	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
-	       paravirt_ops.name);
+	       pv_info.name);
 	printk(KERN_INFO "Hypervisor signature: %s\n", xen_start_info->magic);
 }
 
@@ -738,7 +738,7 @@ static __init void xen_pagetable_setup_start(pgd_t *base)
 	pgd_t *xen_pgd = (pgd_t *)xen_start_info->pt_base;
 
 	/* special set_pte for pagetable initialization */
-	paravirt_ops.set_pte = xen_set_pte_init;
+	pv_mmu_ops.set_pte = xen_set_pte_init;
 
 	init_mm.pgd = base;
 	/*
@@ -785,8 +785,8 @@ static __init void xen_pagetable_setup_done(pgd_t *base)
 {
 	/* This will work as long as patching hasn't happened yet
 	   (which it hasn't) */
-	paravirt_ops.alloc_pt = xen_alloc_pt;
-	paravirt_ops.set_pte = xen_set_pte;
+	pv_mmu_ops.alloc_pt = xen_alloc_pt;
+	pv_mmu_ops.set_pte = xen_set_pte;
 
 	if (!xen_feature(XENFEAT_auto_translated_physmap)) {
 		/*
@@ -833,12 +833,12 @@ void __init xen_setup_vcpu_info_placement(void)
 	if (have_vcpu_info_placement) {
 		printk(KERN_INFO "Xen: using vcpu_info placement\n");
 
-		paravirt_ops.save_fl = xen_save_fl_direct;
-		paravirt_ops.restore_fl = xen_restore_fl_direct;
-		paravirt_ops.irq_disable = xen_irq_disable_direct;
-		paravirt_ops.irq_enable = xen_irq_enable_direct;
-		paravirt_ops.read_cr2 = xen_read_cr2_direct;
-		paravirt_ops.iret = xen_iret_direct;
+		pv_irq_ops.save_fl = xen_save_fl_direct;
+		pv_irq_ops.restore_fl = xen_restore_fl_direct;
+		pv_irq_ops.irq_disable = xen_irq_disable_direct;
+		pv_irq_ops.irq_enable = xen_irq_enable_direct;
+		pv_mmu_ops.read_cr2 = xen_read_cr2_direct;
+		pv_cpu_ops.iret = xen_iret_direct;
 	}
 }
 
@@ -850,8 +850,8 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
 
 	start = end = reloc = NULL;
 
-#define SITE(x)								\
-	case PARAVIRT_PATCH(x):						\
+#define SITE(op, x)							\
+	case PARAVIRT_PATCH(op.x):					\
 	if (have_vcpu_info_placement) {					\
 		start = (char *)xen_##x##_direct;			\
 		end = xen_##x##_direct_end;				\
@@ -860,10 +860,10 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
 	goto patch_site
 
 	switch (type) {
-		SITE(irq_enable);
-		SITE(irq_disable);
-		SITE(save_fl);
-		SITE(restore_fl);
+		SITE(pv_irq_ops, irq_enable);
+		SITE(pv_irq_ops, irq_disable);
+		SITE(pv_irq_ops, save_fl);
+		SITE(pv_irq_ops, restore_fl);
 #undef SITE
 
 	patch_site:
@@ -895,26 +895,32 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
 	return ret;
 }
 
-static const struct paravirt_ops xen_paravirt_ops __initdata = {
+static const struct pv_info xen_info __initdata = {
 	.paravirt_enabled = 1,
 	.shared_kernel_pmd = 0,
 
 	.name = "Xen",
-	.banner = xen_banner,
+};
 
+static const struct pv_init_ops xen_init_ops __initdata = {
 	.patch = xen_patch,
 
+	.banner = xen_banner,
 	.memory_setup = xen_memory_setup,
 	.arch_setup = xen_arch_setup,
-	.init_IRQ = xen_init_IRQ,
 	.post_allocator_init = xen_mark_init_mm_pinned,
+};
 
+static const struct pv_time_ops xen_time_ops __initdata = {
 	.time_init = xen_time_init,
+
 	.set_wallclock = xen_set_wallclock,
 	.get_wallclock = xen_get_wallclock,
 	.get_cpu_khz = xen_cpu_khz,
 	.sched_clock = xen_sched_clock,
+};
 
+static const struct pv_cpu_ops xen_cpu_ops __initdata = {
 	.cpuid = xen_cpuid,
 
 	.set_debugreg = xen_set_debugreg,
@@ -925,22 +931,10 @@ static const struct paravirt_ops xen_paravirt_ops __initdata = {
 	.read_cr0 = native_read_cr0,
 	.write_cr0 = native_write_cr0,
 
-	.read_cr2 = xen_read_cr2,
-	.write_cr2 = xen_write_cr2,
-
-	.read_cr3 = xen_read_cr3,
-	.write_cr3 = xen_write_cr3,
-
 	.read_cr4 = native_read_cr4,
 	.read_cr4_safe = native_read_cr4_safe,
 	.write_cr4 = xen_write_cr4,
 
-	.save_fl = xen_save_fl,
-	.restore_fl = xen_restore_fl,
-	.irq_disable = xen_irq_disable,
-	.irq_enable = xen_irq_enable,
-	.safe_halt = xen_safe_halt,
-	.halt = xen_halt,
 	.wbinvd = native_wbinvd,
 
 	.read_msr = native_read_msr_safe,
@@ -968,7 +962,19 @@ static const struct paravirt_ops xen_paravirt_ops __initdata = {
 
 	.set_iopl_mask = xen_set_iopl_mask,
 	.io_delay = xen_io_delay,
+};
+
+static const struct pv_irq_ops xen_irq_ops __initdata = {
+	.init_IRQ = xen_init_IRQ,
+	.save_fl = xen_save_fl,
+	.restore_fl = xen_restore_fl,
+	.irq_disable = xen_irq_disable,
+	.irq_enable = xen_irq_enable,
+	.safe_halt = xen_safe_halt,
+	.halt = xen_halt,
+};
 
+static const struct pv_apic_ops xen_apic_ops __initdata = {
 #ifdef CONFIG_X86_LOCAL_APIC
 	.apic_write = xen_apic_write,
 	.apic_write_atomic = xen_apic_write,
@@ -977,6 +983,17 @@ static const struct paravirt_ops xen_paravirt_ops __initdata = {
 	.setup_secondary_clock = paravirt_nop,
 	.startup_ipi_hook = paravirt_nop,
 #endif
+};
+
+static const struct pv_mmu_ops xen_mmu_ops __initdata = {
+	.pagetable_setup_start = xen_pagetable_setup_start,
+	.pagetable_setup_done = xen_pagetable_setup_done,
+
+	.read_cr2 = xen_read_cr2,
+	.write_cr2 = xen_write_cr2,
+
+	.read_cr3 = xen_read_cr3,
+	.write_cr3 = xen_write_cr3,
 
 	.flush_tlb_user = xen_flush_tlb,
 	.flush_tlb_kernel = xen_flush_tlb,
@@ -986,9 +1003,6 @@ static const struct paravirt_ops xen_paravirt_ops __initdata = {
 	.pte_update = paravirt_nop,
 	.pte_update_defer = paravirt_nop,
 
-	.pagetable_setup_start = xen_pagetable_setup_start,
-	.pagetable_setup_done = xen_pagetable_setup_done,
-
 	.alloc_pt = xen_alloc_pt_init,
 	.release_pt = xen_release_pt,
 	.alloc_pd = paravirt_nop,
@@ -1023,7 +1037,9 @@ static const struct paravirt_ops xen_paravirt_ops __initdata = {
 	.activate_mm = xen_activate_mm,
 	.dup_mmap = xen_dup_mmap,
 	.exit_mmap = xen_exit_mmap,
+};
 
+static const struct pv_misc_ops xen_misc_ops __initdata = {
 	.set_lazy_mode = xen_set_lazy_mode,
 };
 
@@ -1091,7 +1107,15 @@ asmlinkage void __init xen_start_kernel(void)
 	BUG_ON(memcmp(xen_start_info->magic, "xen-3.0", 7) != 0);
 
 	/* Install Xen paravirt ops */
-	paravirt_ops = xen_paravirt_ops;
+	pv_info = xen_info;
+	pv_init_ops = xen_init_ops;
+	pv_time_ops = xen_time_ops;
+	pv_cpu_ops = xen_cpu_ops;
+	pv_irq_ops = xen_irq_ops;
+	pv_apic_ops = xen_apic_ops;
+	pv_mmu_ops = xen_mmu_ops;
+	pv_misc_ops = xen_misc_ops;
+
 	machine_ops = xen_machine_ops;
 
 #ifdef CONFIG_SMP
@@ -1124,9 +1148,9 @@ asmlinkage void __init xen_start_kernel(void)
 	xen_setup_vcpu_info_placement();
 #endif
 
-	paravirt_ops.kernel_rpl = 1;
+	pv_info.kernel_rpl = 1;
 	if (xen_feature(XENFEAT_supervisor_mode_kernel))
-		paravirt_ops.kernel_rpl = 0;
+		pv_info.kernel_rpl = 0;
 
 	/* set the limit of our address space */
 	reserve_top_address(-HYPERVISOR_VIRT_START + 2 * PAGE_SIZE);

drivers/char/hvc_lguest.c

@@ -115,7 +115,7 @@ static struct hv_ops lguest_cons = {
  * (0), and the struct hv_ops containing the put_chars() function. */
 static int __init cons_init(void)
 {
-	if (strcmp(paravirt_ops.name, "lguest") != 0)
+	if (strcmp(pv_info.name, "lguest") != 0)
 		return 0;
 
 	return hvc_instantiate(0, 0, &lguest_cons);

drivers/lguest/core.c

@@ -248,8 +248,8 @@ static void unmap_switcher(void)
 }
 
 /*H:130 Our Guest is usually so well behaved; it never tries to do things it
- * isn't allowed to.  Unfortunately, "struct paravirt_ops" isn't quite
- * complete, because it doesn't contain replacements for the Intel I/O
+ * isn't allowed to.  Unfortunately, Linux's paravirtual infrastructure isn't
+ * quite complete, because it doesn't contain replacements for the Intel I/O
  * instructions.  As a result, the Guest sometimes fumbles across one during
  * the boot process as it probes for various things which are usually attached
  * to a PC.
@@ -694,7 +694,7 @@ static int __init init(void)
 
 	/* Lguest can't run under Xen, VMI or itself.  It does Tricky Stuff. */
 	if (paravirt_enabled()) {
-		printk("lguest is afraid of %s\n", paravirt_ops.name);
+		printk("lguest is afraid of %s\n", pv_info.name);
 		return -EPERM;
 	}
 

drivers/lguest/lguest.c

@@ -23,7 +23,7 @@
  *
  * So how does the kernel know it's a Guest?  The Guest starts at a special
  * entry point marked with a magic string, which sets up a few things then
- * calls here.  We replace the native functions in "struct paravirt_ops"
+ * calls here.  We replace the native functions various "paravirt" structures
  * with our Guest versions, then boot like normal. :*/
 
 /*
@@ -331,7 +331,7 @@ static void lguest_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 /*G:038 That's enough excitement for now, back to ploughing through each of
- * the paravirt_ops (we're about 1/3 of the way through).
+ * the different pv_ops structures (we're about 1/3 of the way through).
  *
  * This is the Local Descriptor Table, another weird Intel thingy.  Linux only
  * uses this for some strange applications like Wine.  We don't do anything
@@ -558,7 +558,7 @@ static void lguest_set_pte(pte_t *ptep, pte_t pteval)
 		lazy_hcall(LHCALL_FLUSH_TLB, 1, 0, 0);
 }
 
-/* Unfortunately for Lguest, the paravirt_ops for page tables were based on
+/* Unfortunately for Lguest, the pv_mmu_ops for page tables were based on
  * native page table operations.  On native hardware you can set a new page
  * table entry whenever you want, but if you want to remove one you have to do
  * a TLB flush (a TLB is a little cache of page table entries kept by the CPU).
@@ -782,7 +782,7 @@ static void lguest_time_init(void)
 	clocksource_register(&lguest_clock);
 
 	/* Now we've set up our clock, we can use it as the scheduler clock */
-	paravirt_ops.sched_clock = lguest_sched_clock;
+	pv_time_ops.sched_clock = lguest_sched_clock;
 
 	/* We can't set cpumask in the initializer: damn C limitations!  Set it
 	 * here and register our timer device. */
@@ -902,7 +902,7 @@ static __init char *lguest_memory_setup(void)
 /*G:050
  * Patching (Powerfully Placating Performance Pedants)
  *
- * We have already seen that "struct paravirt_ops" lets us replace simple
+ * We have already seen that pv_ops structures let us replace simple
  * native instructions with calls to the appropriate back end all throughout
  * the kernel.  This allows the same kernel to run as a Guest and as a native
  * kernel, but it's slow because of all the indirect branches.
@@ -927,10 +927,10 @@ static const struct lguest_insns
 {
 	const char *start, *end;
 } lguest_insns[] = {
-	[PARAVIRT_PATCH(irq_disable)] = { lgstart_cli, lgend_cli },
-	[PARAVIRT_PATCH(irq_enable)] = { lgstart_sti, lgend_sti },
-	[PARAVIRT_PATCH(restore_fl)] = { lgstart_popf, lgend_popf },
-	[PARAVIRT_PATCH(save_fl)] = { lgstart_pushf, lgend_pushf },
+	[PARAVIRT_PATCH(pv_irq_ops.irq_disable)] = { lgstart_cli, lgend_cli },
+	[PARAVIRT_PATCH(pv_irq_ops.irq_enable)] = { lgstart_sti, lgend_sti },
+	[PARAVIRT_PATCH(pv_irq_ops.restore_fl)] = { lgstart_popf, lgend_popf },
+	[PARAVIRT_PATCH(pv_irq_ops.save_fl)] = { lgstart_pushf, lgend_pushf },
 };
 
 /* Now our patch routine is fairly simple (based on the native one in
@@ -957,9 +957,9 @@ static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf,
 	return insn_len;
 }
 
-/*G:030 Once we get to lguest_init(), we know we're a Guest.  The paravirt_ops
- * structure in the kernel provides a single point for (almost) every routine
- * we have to override to avoid privileged instructions. */
+/*G:030 Once we get to lguest_init(), we know we're a Guest.  The pv_ops
+ * structures in the kernel provide points for (almost) every routine we have
+ * to override to avoid privileged instructions. */
 __init void lguest_init(void *boot)
 {
 	/* Copy boot parameters first: the Launcher put the physical location
@@ -974,54 +974,68 @@ __init void lguest_init(void *boot)
 
 	/* We're under lguest, paravirt is enabled, and we're running at
 	 * privilege level 1, not 0 as normal. */
-	paravirt_ops.name = "lguest";
-	paravirt_ops.paravirt_enabled = 1;
-	paravirt_ops.kernel_rpl = 1;
+	pv_info.name = "lguest";
+	pv_info.paravirt_enabled = 1;
+	pv_info.kernel_rpl = 1;
 
 	/* We set up all the lguest overrides for sensitive operations.  These
 	 * are detailed with the operations themselves. */
-	paravirt_ops.save_fl = save_fl;
-	paravirt_ops.restore_fl = restore_fl;
-	paravirt_ops.irq_disable = irq_disable;
-	paravirt_ops.irq_enable = irq_enable;
-	paravirt_ops.load_gdt = lguest_load_gdt;
-	paravirt_ops.memory_setup = lguest_memory_setup;
-	paravirt_ops.cpuid = lguest_cpuid;
-	paravirt_ops.write_cr3 = lguest_write_cr3;
-	paravirt_ops.flush_tlb_user = lguest_flush_tlb_user;
-	paravirt_ops.flush_tlb_single = lguest_flush_tlb_single;
-	paravirt_ops.flush_tlb_kernel = lguest_flush_tlb_kernel;
-	paravirt_ops.set_pte = lguest_set_pte;
-	paravirt_ops.set_pte_at = lguest_set_pte_at;
-	paravirt_ops.set_pmd = lguest_set_pmd;
+
+	/* interrupt-related operations */
+	pv_irq_ops.init_IRQ = lguest_init_IRQ;
+	pv_irq_ops.save_fl = save_fl;
+	pv_irq_ops.restore_fl = restore_fl;
+	pv_irq_ops.irq_disable = irq_disable;
+	pv_irq_ops.irq_enable = irq_enable;
+	pv_irq_ops.safe_halt = lguest_safe_halt;
+
+	/* init-time operations */
+	pv_init_ops.memory_setup = lguest_memory_setup;
+	pv_init_ops.patch = lguest_patch;
+
+	/* Intercepts of various cpu instructions */
+	pv_cpu_ops.load_gdt = lguest_load_gdt;
+	pv_cpu_ops.cpuid = lguest_cpuid;
+	pv_cpu_ops.load_idt = lguest_load_idt;
+	pv_cpu_ops.iret = lguest_iret;
+	pv_cpu_ops.load_esp0 = lguest_load_esp0;
+	pv_cpu_ops.load_tr_desc = lguest_load_tr_desc;
+	pv_cpu_ops.set_ldt = lguest_set_ldt;
+	pv_cpu_ops.load_tls = lguest_load_tls;
+	pv_cpu_ops.set_debugreg = lguest_set_debugreg;
+	pv_cpu_ops.clts = lguest_clts;
+	pv_cpu_ops.read_cr0 = lguest_read_cr0;
+	pv_cpu_ops.write_cr0 = lguest_write_cr0;
+	pv_cpu_ops.read_cr4 = lguest_read_cr4;
+	pv_cpu_ops.write_cr4 = lguest_write_cr4;
+	pv_cpu_ops.write_gdt_entry = lguest_write_gdt_entry;
+	pv_cpu_ops.write_idt_entry = lguest_write_idt_entry;
+	pv_cpu_ops.wbinvd = lguest_wbinvd;
+
+	/* pagetable management */
+	pv_mmu_ops.write_cr3 = lguest_write_cr3;
+	pv_mmu_ops.flush_tlb_user = lguest_flush_tlb_user;
+	pv_mmu_ops.flush_tlb_single = lguest_flush_tlb_single;
+	pv_mmu_ops.flush_tlb_kernel = lguest_flush_tlb_kernel;
+	pv_mmu_ops.set_pte = lguest_set_pte;
+	pv_mmu_ops.set_pte_at = lguest_set_pte_at;
+	pv_mmu_ops.set_pmd = lguest_set_pmd;
+	pv_mmu_ops.read_cr2 = lguest_read_cr2;
+	pv_mmu_ops.read_cr3 = lguest_read_cr3;
+
 #ifdef CONFIG_X86_LOCAL_APIC
-	paravirt_ops.apic_write = lguest_apic_write;
-	paravirt_ops.apic_write_atomic = lguest_apic_write;
-	paravirt_ops.apic_read = lguest_apic_read;
+	/* apic read/write intercepts */
+	pv_apic_ops.apic_write = lguest_apic_write;
+	pv_apic_ops.apic_write_atomic = lguest_apic_write;
+	pv_apic_ops.apic_read = lguest_apic_read;
 #endif
-	paravirt_ops.load_idt = lguest_load_idt;
-	paravirt_ops.iret = lguest_iret;
-	paravirt_ops.load_esp0 = lguest_load_esp0;
-	paravirt_ops.load_tr_desc = lguest_load_tr_desc;
-	paravirt_ops.set_ldt = lguest_set_ldt;
-	paravirt_ops.load_tls = lguest_load_tls;
-	paravirt_ops.set_debugreg = lguest_set_debugreg;
-	paravirt_ops.clts = lguest_clts;
-	paravirt_ops.read_cr0 = lguest_read_cr0;
-	paravirt_ops.write_cr0 = lguest_write_cr0;
-	paravirt_ops.init_IRQ = lguest_init_IRQ;
-	paravirt_ops.read_cr2 = lguest_read_cr2;
-	paravirt_ops.read_cr3 = lguest_read_cr3;
-	paravirt_ops.read_cr4 = lguest_read_cr4;
-	paravirt_ops.write_cr4 = lguest_write_cr4;
-	paravirt_ops.write_gdt_entry = lguest_write_gdt_entry;
-	paravirt_ops.write_idt_entry = lguest_write_idt_entry;
-	paravirt_ops.patch = lguest_patch;
-	paravirt_ops.safe_halt = lguest_safe_halt;
-	paravirt_ops.get_wallclock = lguest_get_wallclock;
-	paravirt_ops.time_init = lguest_time_init;
-	paravirt_ops.set_lazy_mode = lguest_lazy_mode;
-	paravirt_ops.wbinvd = lguest_wbinvd;
+
+	/* time operations */
+	pv_time_ops.get_wallclock = lguest_get_wallclock;
+	pv_time_ops.time_init = lguest_time_init;
+
+	pv_misc_ops.set_lazy_mode = lguest_lazy_mode;
+
 	/* Now is a good time to look at the implementations of these functions
 	 * before returning to the rest of lguest_init(). */
 

drivers/lguest/lguest_bus.c

@@ -201,7 +201,7 @@ static void scan_devices(void)
  * "struct lguest_device_desc" array. */
 static int __init lguest_bus_init(void)
 {
-	if (strcmp(paravirt_ops.name, "lguest") != 0)
+	if (strcmp(pv_info.name, "lguest") != 0)
 		return 0;
 
 	/* Devices are in a single page above top of "normal" mem */

include/asm-x86/paravirt.h

@@ -33,19 +33,23 @@ enum paravirt_lazy_mode {
 	PARAVIRT_LAZY_FLUSH = 3,
 };
 
-struct paravirt_ops
-{
+
+/* general info */
+struct pv_info {
 	unsigned int kernel_rpl;
 	int shared_kernel_pmd;
- 	int paravirt_enabled;
+	int paravirt_enabled;
 	const char *name;
+};
 
+struct pv_init_ops {
 	/*
-	 * Patch may replace one of the defined code sequences with arbitrary
-	 * code, subject to the same register constraints.  This generally
-	 * means the code is not free to clobber any registers other than EAX.
-	 * The patch function should return the number of bytes of code
-	 * generated, as we nop pad the rest in generic code.
+	 * Patch may replace one of the defined code sequences with
+	 * arbitrary code, subject to the same register constraints.
+	 * This generally means the code is not free to clobber any
+	 * registers other than EAX.  The patch function should return
+	 * the number of bytes of code generated, as we nop pad the
+	 * rest in generic code.
 	 */
 	unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
 			  unsigned long addr, unsigned len);
@@ -55,29 +59,28 @@ struct paravirt_ops
 	char *(*memory_setup)(void);
 	void (*post_allocator_init)(void);
 
-	void (*init_IRQ)(void);
-	void (*time_init)(void);
-
-	/*
-	 * Called before/after init_mm pagetable setup. setup_start
-	 * may reset %cr3, and may pre-install parts of the pagetable;
-	 * pagetable setup is expected to preserve any existing
-	 * mapping.
-	 */
-	void (*pagetable_setup_start)(pgd_t *pgd_base);
-	void (*pagetable_setup_done)(pgd_t *pgd_base);
-
 	/* Print a banner to identify the environment */
 	void (*banner)(void);
+};
+
+
+struct pv_misc_ops {
+	/* Set deferred update mode, used for batching operations. */
+	void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
+};
+
+struct pv_time_ops {
+	void (*time_init)(void);
 
 	/* Set and set time of day */
 	unsigned long (*get_wallclock)(void);
 	int (*set_wallclock)(unsigned long);
 
-	/* cpuid emulation, mostly so that caps bits can be disabled */
-	void (*cpuid)(unsigned int *eax, unsigned int *ebx,
-		      unsigned int *ecx, unsigned int *edx);
+	unsigned long long (*sched_clock)(void);
+	unsigned long (*get_cpu_khz)(void);
+};
 
+struct pv_cpu_ops {
 	/* hooks for various privileged instructions */
 	unsigned long (*get_debugreg)(int regno);
 	void (*set_debugreg)(int regno, unsigned long value);
@@ -87,41 +90,10 @@ struct paravirt_ops
 	unsigned long (*read_cr0)(void);
 	void (*write_cr0)(unsigned long);
 
-	unsigned long (*read_cr2)(void);
-	void (*write_cr2)(unsigned long);
-
-	unsigned long (*read_cr3)(void);
-	void (*write_cr3)(unsigned long);
-
 	unsigned long (*read_cr4_safe)(void);
 	unsigned long (*read_cr4)(void);
 	void (*write_cr4)(unsigned long);
 
-	/*
-	 * Get/set interrupt state.  save_fl and restore_fl are only
-	 * expected to use X86_EFLAGS_IF; all other bits
-	 * returned from save_fl are undefined, and may be ignored by
-	 * restore_fl.
-	 */
-	unsigned long (*save_fl)(void);
-	void (*restore_fl)(unsigned long);
-	void (*irq_disable)(void);
-	void (*irq_enable)(void);
-	void (*safe_halt)(void);
-	void (*halt)(void);
-
-	void (*wbinvd)(void);
-
-	/* MSR, PMC and TSR operations.
-	   err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
-	u64 (*read_msr)(unsigned int msr, int *err);
-	int (*write_msr)(unsigned int msr, u64 val);
-
-	u64 (*read_tsc)(void);
-	u64 (*read_pmc)(void);
-	unsigned long long (*sched_clock)(void);
-	unsigned long (*get_cpu_khz)(void);
-
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
 	void (*load_gdt)(const struct Xgt_desc_struct *);
@@ -140,18 +112,45 @@ struct paravirt_ops
 	void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
+
+	void (*wbinvd)(void);
 	void (*io_delay)(void);
 
+	/* cpuid emulation, mostly so that caps bits can be disabled */
+	void (*cpuid)(unsigned int *eax, unsigned int *ebx,
+		      unsigned int *ecx, unsigned int *edx);
+
+	/* MSR, PMC and TSR operations.
+	   err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
+	u64 (*read_msr)(unsigned int msr, int *err);
+	int (*write_msr)(unsigned int msr, u64 val);
+
+	u64 (*read_tsc)(void);
+	u64 (*read_pmc)(void);
+
+	/* These two are jmp to, not actually called. */
+	void (*irq_enable_sysexit)(void);
+	void (*iret)(void);
+};
+
+struct pv_irq_ops {
+	void (*init_IRQ)(void);
+
 	/*
-	 * Hooks for intercepting the creation/use/destruction of an
-	 * mm_struct.
+	 * Get/set interrupt state.  save_fl and restore_fl are only
+	 * expected to use X86_EFLAGS_IF; all other bits
+	 * returned from save_fl are undefined, and may be ignored by
+	 * restore_fl.
 	 */
-	void (*activate_mm)(struct mm_struct *prev,
-			    struct mm_struct *next);
-	void (*dup_mmap)(struct mm_struct *oldmm,
-			 struct mm_struct *mm);
-	void (*exit_mmap)(struct mm_struct *mm);
+	unsigned long (*save_fl)(void);
+	void (*restore_fl)(unsigned long);
+	void (*irq_disable)(void);
+	void (*irq_enable)(void);
+	void (*safe_halt)(void);
+	void (*halt)(void);
+};
 
+struct pv_apic_ops {
 #ifdef CONFIG_X86_LOCAL_APIC
 	/*
 	 * Direct APIC operations, principally for VMI.  Ideally
@@ -167,6 +166,34 @@ struct paravirt_ops
 				 unsigned long start_eip,
 				 unsigned long start_esp);
 #endif
+};
+
+struct pv_mmu_ops {
+	/*
+	 * Called before/after init_mm pagetable setup. setup_start
+	 * may reset %cr3, and may pre-install parts of the pagetable;
+	 * pagetable setup is expected to preserve any existing
+	 * mapping.
+	 */
+	void (*pagetable_setup_start)(pgd_t *pgd_base);
+	void (*pagetable_setup_done)(pgd_t *pgd_base);
+
+	unsigned long (*read_cr2)(void);
+	void (*write_cr2)(unsigned long);
+
+	unsigned long (*read_cr3)(void);
+	void (*write_cr3)(unsigned long);
+
+	/*
+	 * Hooks for intercepting the creation/use/destruction of an
+	 * mm_struct.
+	 */
+	void (*activate_mm)(struct mm_struct *prev,
+			    struct mm_struct *next);
+	void (*dup_mmap)(struct mm_struct *oldmm,
+			 struct mm_struct *mm);
+	void (*exit_mmap)(struct mm_struct *mm);
+
 
 	/* TLB operations */
 	void (*flush_tlb_user)(void);
@@ -191,15 +218,12 @@ struct paravirt_ops
 	void (*pte_update_defer)(struct mm_struct *mm,
 				 unsigned long addr, pte_t *ptep);
 
-#ifdef CONFIG_HIGHPTE
-	void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
-#endif
-
 #ifdef CONFIG_X86_PAE
 	void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
- 	void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
+	void (*set_pte_present)(struct mm_struct *mm, unsigned long addr,
+				pte_t *ptep, pte_t pte);
 	void (*set_pud)(pud_t *pudp, pud_t pudval);
- 	void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
+	void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 	void (*pmd_clear)(pmd_t *pmdp);
 
 	unsigned long long (*pte_val)(pte_t);
@@ -217,21 +241,40 @@ struct paravirt_ops
 	pgd_t (*make_pgd)(unsigned long pgd);
 #endif
 
-	/* Set deferred update mode, used for batching operations. */
-	void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
+#ifdef CONFIG_HIGHPTE
+	void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
+#endif
+};
 
-	/* These two are jmp to, not actually called. */
-	void (*irq_enable_sysexit)(void);
-	void (*iret)(void);
+/* This contains all the paravirt structures: we get a convenient
+ * number for each function using the offset which we use to indicate
+ * what to patch. */
+struct paravirt_patch_template
+{
+	struct pv_init_ops pv_init_ops;
+	struct pv_misc_ops pv_misc_ops;
+	struct pv_time_ops pv_time_ops;
+	struct pv_cpu_ops pv_cpu_ops;
+	struct pv_irq_ops pv_irq_ops;
+	struct pv_apic_ops pv_apic_ops;
+	struct pv_mmu_ops pv_mmu_ops;
 };
 
-extern struct paravirt_ops paravirt_ops;
+extern struct pv_info pv_info;
+extern struct pv_init_ops pv_init_ops;
+extern struct pv_misc_ops pv_misc_ops;
+extern struct pv_time_ops pv_time_ops;
+extern struct pv_cpu_ops pv_cpu_ops;
+extern struct pv_irq_ops pv_irq_ops;
+extern struct pv_apic_ops pv_apic_ops;
+extern struct pv_mmu_ops pv_mmu_ops;
 
 #define PARAVIRT_PATCH(x)					\
-	(offsetof(struct paravirt_ops, x) / sizeof(void *))
+	(offsetof(struct paravirt_patch_template, x) / sizeof(void *))
 
-#define paravirt_type(type)					\
-	[paravirt_typenum] "i" (PARAVIRT_PATCH(type))
+#define paravirt_type(op)				\
+	[paravirt_typenum] "i" (PARAVIRT_PATCH(op)),	\
+	[paravirt_opptr] "m" (op)
 #define paravirt_clobber(clobber)		\
 	[paravirt_clobber] "i" (clobber)
 
@@ -258,7 +301,7 @@ unsigned paravirt_patch_call(void *insnbuf,
 			     const void *target, u16 tgt_clobbers,
 			     unsigned long addr, u16 site_clobbers,
 			     unsigned len);
-unsigned paravirt_patch_jmp(const void *target, void *insnbuf,
+unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
 			    unsigned long addr, unsigned len);
 unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
 				unsigned long addr, unsigned len);
@@ -271,14 +314,14 @@ int paravirt_disable_iospace(void);
 /*
  * This generates an indirect call based on the operation type number.
  * The type number, computed in PARAVIRT_PATCH, is derived from the
- * offset into the paravirt_ops structure, and can therefore be freely
- * converted back into a structure offset.
+ * offset into the paravirt_patch_template structure, and can therefore be
+ * freely converted back into a structure offset.
  */
-#define PARAVIRT_CALL	"call *(paravirt_ops+%c[paravirt_typenum]*4);"
+#define PARAVIRT_CALL	"call *%[paravirt_opptr];"
 
 /*
- * These macros are intended to wrap calls into a paravirt_ops
- * operation, so that they can be later identified and patched at
+ * These macros are intended to wrap calls through one of the paravirt
+ * ops structs, so that they can be later identified and patched at
  * runtime.
  *
  * Normally, a call to a pv_op function is a simple indirect call:
@@ -301,7 +344,7 @@ int paravirt_disable_iospace(void);
  * The call instruction itself is marked by placing its start address
  * and size into the .parainstructions section, so that
  * apply_paravirt() in arch/i386/kernel/alternative.c can do the
- * appropriate patching under the control of the backend paravirt_ops
+ * appropriate patching under the control of the backend pv_init_ops
  * implementation.
  *
  * Unfortunately there's no way to get gcc to generate the args setup
@@ -409,36 +452,36 @@ int paravirt_disable_iospace(void);
 
 static inline int paravirt_enabled(void)
 {
-	return paravirt_ops.paravirt_enabled;
+	return pv_info.paravirt_enabled;
 }
 
 static inline void load_esp0(struct tss_struct *tss,
 			     struct thread_struct *thread)
 {
-	PVOP_VCALL2(load_esp0, tss, thread);
+	PVOP_VCALL2(pv_cpu_ops.load_esp0, tss, thread);
 }
 
-#define ARCH_SETUP			paravirt_ops.arch_setup();
+#define ARCH_SETUP			pv_init_ops.arch_setup();
 static inline unsigned long get_wallclock(void)
 {
-	return PVOP_CALL0(unsigned long, get_wallclock);
+	return PVOP_CALL0(unsigned long, pv_time_ops.get_wallclock);
 }
 
 static inline int set_wallclock(unsigned long nowtime)
 {
-	return PVOP_CALL1(int, set_wallclock, nowtime);
+	return PVOP_CALL1(int, pv_time_ops.set_wallclock, nowtime);
 }
 
 static inline void (*choose_time_init(void))(void)
 {
-	return paravirt_ops.time_init;
+	return pv_time_ops.time_init;
 }
 
 /* The paravirtualized CPUID instruction. */
 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
 			   unsigned int *ecx, unsigned int *edx)
 {
-	PVOP_VCALL4(cpuid, eax, ebx, ecx, edx);
+	PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
 }
 
 /*
@@ -446,87 +489,87 @@ static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
  */
 static inline unsigned long paravirt_get_debugreg(int reg)
 {
-	return PVOP_CALL1(unsigned long, get_debugreg, reg);
+	return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
 }
 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
 static inline void set_debugreg(unsigned long val, int reg)
 {
-	PVOP_VCALL2(set_debugreg, reg, val);
+	PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
 }
 
 static inline void clts(void)
 {
-	PVOP_VCALL0(clts);
+	PVOP_VCALL0(pv_cpu_ops.clts);
 }
 
 static inline unsigned long read_cr0(void)
 {
-	return PVOP_CALL0(unsigned long, read_cr0);
+	return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
 }
 
 static inline void write_cr0(unsigned long x)
 {
-	PVOP_VCALL1(write_cr0, x);
+	PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
 }
 
 static inline unsigned long read_cr2(void)
 {
-	return PVOP_CALL0(unsigned long, read_cr2);
+	return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
 }
 
 static inline void write_cr2(unsigned long x)
 {
-	PVOP_VCALL1(write_cr2, x);
+	PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
 }
 
 static inline unsigned long read_cr3(void)
 {
-	return PVOP_CALL0(unsigned long, read_cr3);
+	return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
 }
 
 static inline void write_cr3(unsigned long x)
 {
-	PVOP_VCALL1(write_cr3, x);
+	PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
 }
 
 static inline unsigned long read_cr4(void)
 {
-	return PVOP_CALL0(unsigned long, read_cr4);
+	return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
 }
 static inline unsigned long read_cr4_safe(void)
 {
-	return PVOP_CALL0(unsigned long, read_cr4_safe);
+	return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe);
 }
 
 static inline void write_cr4(unsigned long x)
 {
-	PVOP_VCALL1(write_cr4, x);
+	PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
 }
 
 static inline void raw_safe_halt(void)
 {
-	PVOP_VCALL0(safe_halt);
+	PVOP_VCALL0(pv_irq_ops.safe_halt);
 }
 
 static inline void halt(void)
 {
-	PVOP_VCALL0(safe_halt);
+	PVOP_VCALL0(pv_irq_ops.safe_halt);
 }
 
 static inline void wbinvd(void)
 {
-	PVOP_VCALL0(wbinvd);
+	PVOP_VCALL0(pv_cpu_ops.wbinvd);
 }
 
-#define get_kernel_rpl()  (paravirt_ops.kernel_rpl)
+#define get_kernel_rpl()  (pv_info.kernel_rpl)
 
 static inline u64 paravirt_read_msr(unsigned msr, int *err)
 {
-	return PVOP_CALL2(u64, read_msr, msr, err);
+	return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
 }
 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
 {
-	return PVOP_CALL3(int, write_msr, msr, low, high);
+	return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
 }
 
 /* These should all do BUG_ON(_err), but our headers are too tangled. */
@@ -560,7 +603,7 @@ static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
 
 static inline u64 paravirt_read_tsc(void)
 {
-	return PVOP_CALL0(u64, read_tsc);
+	return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
 }
 
 #define rdtscl(low) do {			\
@@ -572,15 +615,15 @@ static inline u64 paravirt_read_tsc(void)
 
 static inline unsigned long long paravirt_sched_clock(void)
 {
-	return PVOP_CALL0(unsigned long long, sched_clock);
+	return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
 }
-#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
+#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz())
 
 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 
 static inline unsigned long long paravirt_read_pmc(int counter)
 {
-	return PVOP_CALL1(u64, read_pmc, counter);
+	return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
 }
 
 #define rdpmc(counter,low,high) do {		\
@@ -591,61 +634,61 @@ static inline unsigned long long paravirt_read_pmc(int counter)
 
 static inline void load_TR_desc(void)
 {
-	PVOP_VCALL0(load_tr_desc);
+	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
 static inline void load_gdt(const struct Xgt_desc_struct *dtr)
 {
-	PVOP_VCALL1(load_gdt, dtr);
+	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
 static inline void load_idt(const struct Xgt_desc_struct *dtr)
 {
-	PVOP_VCALL1(load_idt, dtr);
+	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
 static inline void set_ldt(const void *addr, unsigned entries)
 {
-	PVOP_VCALL2(set_ldt, addr, entries);
+	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
 static inline void store_gdt(struct Xgt_desc_struct *dtr)
 {
-	PVOP_VCALL1(store_gdt, dtr);
+	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
 static inline void store_idt(struct Xgt_desc_struct *dtr)
 {
-	PVOP_VCALL1(store_idt, dtr);
+	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
 static inline unsigned long paravirt_store_tr(void)
 {
-	return PVOP_CALL0(unsigned long, store_tr);
+	return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
 }
 #define store_tr(tr)	((tr) = paravirt_store_tr())
 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
-	PVOP_VCALL2(load_tls, t, cpu);
+	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
 static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
-	PVOP_VCALL4(write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
 static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
-	PVOP_VCALL4(write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
 static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
 {
-	PVOP_VCALL4(write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-	PVOP_VCALL1(set_iopl_mask, mask);
+	PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
 }
 
 /* The paravirtualized I/O functions */
 static inline void slow_down_io(void) {
-	paravirt_ops.io_delay();
+	pv_cpu_ops.io_delay();
 #ifdef REALLY_SLOW_IO
-	paravirt_ops.io_delay();
-	paravirt_ops.io_delay();
-	paravirt_ops.io_delay();
+	pv_cpu_ops.io_delay();
+	pv_cpu_ops.io_delay();
+	pv_cpu_ops.io_delay();
 #endif
 }
 
@@ -655,121 +698,120 @@ static inline void slow_down_io(void) {
  */
 static inline void apic_write(unsigned long reg, unsigned long v)
 {
-	PVOP_VCALL2(apic_write, reg, v);
+	PVOP_VCALL2(pv_apic_ops.apic_write, reg, v);
 }
 
 static inline void apic_write_atomic(unsigned long reg, unsigned long v)
 {
-	PVOP_VCALL2(apic_write_atomic, reg, v);
+	PVOP_VCALL2(pv_apic_ops.apic_write_atomic, reg, v);
 }
 
 static inline unsigned long apic_read(unsigned long reg)
 {
-	return PVOP_CALL1(unsigned long, apic_read, reg);
+	return PVOP_CALL1(unsigned long, pv_apic_ops.apic_read, reg);
 }
 
 static inline void setup_boot_clock(void)
 {
-	PVOP_VCALL0(setup_boot_clock);
+	PVOP_VCALL0(pv_apic_ops.setup_boot_clock);
 }
 
 static inline void setup_secondary_clock(void)
 {
-	PVOP_VCALL0(setup_secondary_clock);
+	PVOP_VCALL0(pv_apic_ops.setup_secondary_clock);
 }
 #endif
 
 static inline void paravirt_post_allocator_init(void)
 {
-	if (paravirt_ops.post_allocator_init)
-		(*paravirt_ops.post_allocator_init)();
+	if (pv_init_ops.post_allocator_init)
+		(*pv_init_ops.post_allocator_init)();
 }
 
 static inline void paravirt_pagetable_setup_start(pgd_t *base)
 {
-	if (paravirt_ops.pagetable_setup_start)
-		(*paravirt_ops.pagetable_setup_start)(base);
+	(*pv_mmu_ops.pagetable_setup_start)(base);
 }
 
 static inline void paravirt_pagetable_setup_done(pgd_t *base)
 {
-	if (paravirt_ops.pagetable_setup_done)
-		(*paravirt_ops.pagetable_setup_done)(base);
+	(*pv_mmu_ops.pagetable_setup_done)(base);
 }
 
 #ifdef CONFIG_SMP
 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
 				    unsigned long start_esp)
 {
-	PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp);
+	PVOP_VCALL3(pv_apic_ops.startup_ipi_hook,
+		    phys_apicid, start_eip, start_esp);
 }
 #endif
 
 static inline void paravirt_activate_mm(struct mm_struct *prev,
 					struct mm_struct *next)
 {
-	PVOP_VCALL2(activate_mm, prev, next);
+	PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
 }
 
 static inline void arch_dup_mmap(struct mm_struct *oldmm,
 				 struct mm_struct *mm)
 {
-	PVOP_VCALL2(dup_mmap, oldmm, mm);
+	PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
 }
 
 static inline void arch_exit_mmap(struct mm_struct *mm)
 {
-	PVOP_VCALL1(exit_mmap, mm);
+	PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
 }
 
 static inline void __flush_tlb(void)
 {
-	PVOP_VCALL0(flush_tlb_user);
+	PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
 }
 static inline void __flush_tlb_global(void)
 {
-	PVOP_VCALL0(flush_tlb_kernel);
+	PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
 }
 static inline void __flush_tlb_single(unsigned long addr)
 {
-	PVOP_VCALL1(flush_tlb_single, addr);
+	PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
 }
 
 static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
 				    unsigned long va)
 {
-	PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va);
+	PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, &cpumask, mm, va);
 }
 
 static inline void paravirt_alloc_pt(struct mm_struct *mm, unsigned pfn)
 {
-	PVOP_VCALL2(alloc_pt, mm, pfn);
+	PVOP_VCALL2(pv_mmu_ops.alloc_pt, mm, pfn);
 }
 static inline void paravirt_release_pt(unsigned pfn)
 {
-	PVOP_VCALL1(release_pt, pfn);
+	PVOP_VCALL1(pv_mmu_ops.release_pt, pfn);
 }
 
 static inline void paravirt_alloc_pd(unsigned pfn)
 {
-	PVOP_VCALL1(alloc_pd, pfn);
+	PVOP_VCALL1(pv_mmu_ops.alloc_pd, pfn);
 }
 
 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
 					   unsigned start, unsigned count)
 {
-	PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count);
+	PVOP_VCALL4(pv_mmu_ops.alloc_pd_clone, pfn, clonepfn, start, count);
 }
 static inline void paravirt_release_pd(unsigned pfn)
 {
-	PVOP_VCALL1(release_pd, pfn);
+	PVOP_VCALL1(pv_mmu_ops.release_pd, pfn);
 }
 
 #ifdef CONFIG_HIGHPTE
 static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
 {
 	unsigned long ret;
-	ret = PVOP_CALL2(unsigned long, kmap_atomic_pte, page, type);
+	ret = PVOP_CALL2(unsigned long, pv_mmu_ops.kmap_atomic_pte, page, type);
 	return (void *)ret;
 }
 #endif
@@ -777,162 +819,171 @@ static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
 			      pte_t *ptep)
 {
-	PVOP_VCALL3(pte_update, mm, addr, ptep);
+	PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
 }
 
 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
 				    pte_t *ptep)
 {
-	PVOP_VCALL3(pte_update_defer, mm, addr, ptep);
+	PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
 }
 
 #ifdef CONFIG_X86_PAE
 static inline pte_t __pte(unsigned long long val)
 {
-	unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte,
+	unsigned long long ret = PVOP_CALL2(unsigned long long,
+					    pv_mmu_ops.make_pte,
 					    val, val >> 32);
 	return (pte_t) { ret, ret >> 32 };
 }
 
 static inline pmd_t __pmd(unsigned long long val)
 {
-	return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) };
+	return (pmd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pmd,
+				    val, val >> 32) };
 }
 
 static inline pgd_t __pgd(unsigned long long val)
 {
-	return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) };
+	return (pgd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pgd,
+				    val, val >> 32) };
 }
 
 static inline unsigned long long pte_val(pte_t x)
 {
-	return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high);
+	return PVOP_CALL2(unsigned long long, pv_mmu_ops.pte_val,
+			  x.pte_low, x.pte_high);
 }
 
 static inline unsigned long long pmd_val(pmd_t x)
 {
-	return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32);
+	return PVOP_CALL2(unsigned long long, pv_mmu_ops.pmd_val,
+			  x.pmd, x.pmd >> 32);
 }
 
 static inline unsigned long long pgd_val(pgd_t x)
 {
-	return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32);
+	return PVOP_CALL2(unsigned long long, pv_mmu_ops.pgd_val,
+			  x.pgd, x.pgd >> 32);
 }
 
 static inline void set_pte(pte_t *ptep, pte_t pteval)
 {
-	PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high);
+	PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pteval.pte_low, pteval.pte_high);
 }
 
 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 			      pte_t *ptep, pte_t pteval)
 {
 	/* 5 arg words */
-	paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
+	pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
 }
 
 static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
 {
-	PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high);
+	PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
+		    pteval.pte_low, pteval.pte_high);
 }
 
 static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
 				   pte_t *ptep, pte_t pte)
 {
 	/* 5 arg words */
-	paravirt_ops.set_pte_present(mm, addr, ptep, pte);
+	pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
 }
 
 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 {
-	PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32);
+	PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp,
+		    pmdval.pmd, pmdval.pmd >> 32);
 }
 
 static inline void set_pud(pud_t *pudp, pud_t pudval)
 {
-	PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32);
+	PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
+		    pudval.pgd.pgd, pudval.pgd.pgd >> 32);
 }
 
 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
-	PVOP_VCALL3(pte_clear, mm, addr, ptep);
+	PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
 }
 
 static inline void pmd_clear(pmd_t *pmdp)
 {
-	PVOP_VCALL1(pmd_clear, pmdp);
+	PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
 }
 
 #else  /* !CONFIG_X86_PAE */
 
 static inline pte_t __pte(unsigned long val)
 {
-	return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
+	return (pte_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pte, val) };
 }
 
 static inline pgd_t __pgd(unsigned long val)
 {
-	return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) };
+	return (pgd_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pgd, val) };
 }
 
 static inline unsigned long pte_val(pte_t x)
 {
-	return PVOP_CALL1(unsigned long, pte_val, x.pte_low);
+	return PVOP_CALL1(unsigned long, pv_mmu_ops.pte_val, x.pte_low);
 }
 
 static inline unsigned long pgd_val(pgd_t x)
 {
-	return PVOP_CALL1(unsigned long, pgd_val, x.pgd);
+	return PVOP_CALL1(unsigned long, pv_mmu_ops.pgd_val, x.pgd);
 }
 
 static inline void set_pte(pte_t *ptep, pte_t pteval)
 {
-	PVOP_VCALL2(set_pte, ptep, pteval.pte_low);
+	PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pteval.pte_low);
 }
 
 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
 			      pte_t *ptep, pte_t pteval)
 {
-	PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low);
+	PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pteval.pte_low);
 }
 
 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 {
-	PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
+	PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
 }
 #endif	/* CONFIG_X86_PAE */
 
 #define  __HAVE_ARCH_ENTER_LAZY_CPU_MODE
 static inline void arch_enter_lazy_cpu_mode(void)
 {
-	PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU);
+	PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_CPU);
 }
 
 static inline void arch_leave_lazy_cpu_mode(void)
 {
-	PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
+	PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_NONE);
 }
 
 static inline void arch_flush_lazy_cpu_mode(void)
 {
-	PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
+	PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_FLUSH);
 }
 
 
 #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
 static inline void arch_enter_lazy_mmu_mode(void)
 {
-	PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU);
+	PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_MMU);
 }
 
 static inline void arch_leave_lazy_mmu_mode(void)
 {
-	PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE);
+	PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_NONE);
 }
 
 static inline void arch_flush_lazy_mmu_mode(void)
 {
-	PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
+	PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_FLUSH);
 }
 
 void _paravirt_nop(void);
@@ -957,7 +1008,7 @@ static inline unsigned long __raw_local_save_flags(void)
 				  PARAVIRT_CALL
 				  "popl %%edx; popl %%ecx")
 		     : "=a"(f)
-		     : paravirt_type(save_fl),
+		     : paravirt_type(pv_irq_ops.save_fl),
 		       paravirt_clobber(CLBR_EAX)
 		     : "memory", "cc");
 	return f;
@@ -970,7 +1021,7 @@ static inline void raw_local_irq_restore(unsigned long f)
 				  "popl %%edx; popl %%ecx")
 		     : "=a"(f)
 		     : "0"(f),
-		       paravirt_type(restore_fl),
+		       paravirt_type(pv_irq_ops.restore_fl),
 		       paravirt_clobber(CLBR_EAX)
 		     : "memory", "cc");
 }
@@ -981,7 +1032,7 @@ static inline void raw_local_irq_disable(void)
 				  PARAVIRT_CALL
 				  "popl %%edx; popl %%ecx")
 		     :
-		     : paravirt_type(irq_disable),
+		     : paravirt_type(pv_irq_ops.irq_disable),
 		       paravirt_clobber(CLBR_EAX)
 		     : "memory", "eax", "cc");
 }
@@ -992,7 +1043,7 @@ static inline void raw_local_irq_enable(void)
 				  PARAVIRT_CALL
 				  "popl %%edx; popl %%ecx")
 		     :
-		     : paravirt_type(irq_enable),
+		     : paravirt_type(pv_irq_ops.irq_enable),
 		       paravirt_clobber(CLBR_EAX)
 		     : "memory", "eax", "cc");
 }
@@ -1008,21 +1059,23 @@ static inline unsigned long __raw_local_irq_save(void)
 
 #define CLI_STRING							\
 	_paravirt_alt("pushl %%ecx; pushl %%edx;"			\
-		      "call *paravirt_ops+%c[paravirt_cli_type]*4;"	\
+		      "call *%[paravirt_cli_opptr];"			\
 		      "popl %%edx; popl %%ecx",				\
 		      "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
 
 #define STI_STRING							\
 	_paravirt_alt("pushl %%ecx; pushl %%edx;"			\
-		      "call *paravirt_ops+%c[paravirt_sti_type]*4;"	\
+		      "call *%[paravirt_sti_opptr];"			\
 		      "popl %%edx; popl %%ecx",				\
 		      "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
 
 #define CLI_STI_CLOBBERS , "%eax"
 #define CLI_STI_INPUT_ARGS						\
 	,								\
-	[paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)),		\
-	[paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)),		\
+	[paravirt_cli_type] "i" (PARAVIRT_PATCH(pv_irq_ops.irq_disable)),		\
+	[paravirt_cli_opptr] "m" (pv_irq_ops.irq_disable),		\
+	[paravirt_sti_type] "i" (PARAVIRT_PATCH(pv_irq_ops.irq_enable)),		\
+	[paravirt_sti_opptr] "m" (pv_irq_ops.irq_enable),		\
 	paravirt_clobber(CLBR_EAX)
 
 /* Make sure as little as possible of this mess escapes. */
@@ -1042,7 +1095,7 @@ static inline unsigned long __raw_local_irq_save(void)
 
 #else  /* __ASSEMBLY__ */
 
-#define PARA_PATCH(off)	((off) / 4)
+#define PARA_PATCH(struct, off)	((PARAVIRT_PATCH_##struct + (off)) / 4)
 
 #define PARA_SITE(ptype, clobbers, ops)		\
 771:;						\
@@ -1055,29 +1108,29 @@ static inline unsigned long __raw_local_irq_save(void)
 	 .short clobbers;			\
 	.popsection
 
-#define INTERRUPT_RETURN					\
-	PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE,		\
-		  jmp *%cs:paravirt_ops+PARAVIRT_iret)
+#define INTERRUPT_RETURN						\
+	PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE,	\
+		  jmp *%cs:pv_cpu_ops+PV_CPU_iret)
 
 #define DISABLE_INTERRUPTS(clobbers)					\
-	PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers,		\
+	PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
 		  pushl %eax; pushl %ecx; pushl %edx;			\
-		  call *%cs:paravirt_ops+PARAVIRT_irq_disable;		\
+		  call *%cs:pv_irq_ops+PV_IRQ_irq_disable;		\
 		  popl %edx; popl %ecx; popl %eax)			\
 
 #define ENABLE_INTERRUPTS(clobbers)					\
-	PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers,		\
+	PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers,	\
 		  pushl %eax; pushl %ecx; pushl %edx;			\
-		  call *%cs:paravirt_ops+PARAVIRT_irq_enable;		\
+		  call *%cs:pv_irq_ops+PV_IRQ_irq_enable;		\
 		  popl %edx; popl %ecx; popl %eax)
 
-#define ENABLE_INTERRUPTS_SYSEXIT					\
-	PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE,	\
-		  jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
+#define ENABLE_INTERRUPTS_SYSEXIT					       \
+	PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_sysexit), CLBR_NONE,\
+		  jmp *%cs:pv_cpu_ops+PV_CPU_irq_enable_sysexit)
 
 #define GET_CR0_INTO_EAX			\
 	push %ecx; push %edx;			\
-	call *paravirt_ops+PARAVIRT_read_cr0;	\
+	call *pv_cpu_ops+PV_CPU_read_cr0;	\
 	pop %edx; pop %ecx
 
 #endif /* __ASSEMBLY__ */

include/asm-x86/pgtable-3level-defs.h

@@ -2,7 +2,7 @@
 #define _I386_PGTABLE_3LEVEL_DEFS_H
 
 #ifdef CONFIG_PARAVIRT
-#define SHARED_KERNEL_PMD	(paravirt_ops.shared_kernel_pmd)
+#define SHARED_KERNEL_PMD	(pv_info.shared_kernel_pmd)
 #else
 #define SHARED_KERNEL_PMD	1
 #endif