[deliverable/linux.git] / arch / x86 / kernel / paravirt_32.c

/*  Paravirtualization interfaces
    Copyright (C) 2006 Rusty Russell IBM Corporation

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/efi.h>
#include <linux/bcd.h>
#include <linux/highmem.h>

#include <asm/bug.h>
#include <asm/paravirt.h>
#include <asm/desc.h>
#include <asm/setup.h>
#include <asm/arch_hooks.h>
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/delay.h>
#include <asm/fixmap.h>
#include <asm/apic.h>
#include <asm/tlbflush.h>
#include <asm/timer.h>

/* nop stub */
void _paravirt_nop(void)
{
}

static void __init default_banner(void)
{
	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
	       pv_info.name);
}

char *memory_setup(void)
{
	return pv_init_ops.memory_setup();
}

/* Simple instruction patching code. */
#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)
{
	const unsigned char *start, *end;
	unsigned ret;

	switch(type) {
#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;

	default:
		ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
		break;
	}

	return ret;
}

unsigned paravirt_patch_nop(void)
{
	return 0;
}

unsigned paravirt_patch_ignore(unsigned len)
{
	return len;
}

struct branch {
	unsigned char opcode;
	u32 delta;
} __attribute__((packed));

unsigned paravirt_patch_call(void *insnbuf,
			     const void *target, u16 tgt_clobbers,
			     unsigned long addr, u16 site_clobbers,
			     unsigned len)
{
	struct branch *b = insnbuf;
	unsigned long delta = (unsigned long)target - (addr+5);

	if (tgt_clobbers & ~site_clobbers)
		return len;	/* target would clobber too much for this site */
	if (len < 5)
		return len;	/* call too long for patch site */

	b->opcode = 0xe8; /* call */
	b->delta = delta;
	BUILD_BUG_ON(sizeof(*b) != 5);

	return 5;
}

unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
			    unsigned long addr, unsigned len)
{
	struct branch *b = insnbuf;
	unsigned long delta = (unsigned long)target - (addr+5);

	if (len < 5)
		return len;	/* call too long for patch site */

	b->opcode = 0xe9;	/* jmp */
	b->delta = delta;

	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 = 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, 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(pv_cpu_ops.iret) ||
		 type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit))
		/* If operation requires a jmp, then jmp */
		ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
	else
		/* Otherwise call the function; assume target could
		   clobber any caller-save reg */
		ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY,
					  addr, clobbers, len);

	return ret;
}

unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
			      const char *start, const char *end)
{
	unsigned insn_len = end - start;

	if (insn_len > len || start == NULL)
		insn_len = len;
	else
		memcpy(insnbuf, start, insn_len);

	return insn_len;
}

void init_IRQ(void)
{
	pv_irq_ops.init_IRQ();
}

static void native_flush_tlb(void)
{
	__native_flush_tlb();
}

/*
 * Global pages have to be flushed a bit differently. Not a real
 * performance problem because this does not happen often.
 */
static void native_flush_tlb_global(void)
{
	__native_flush_tlb_global();
}

static void native_flush_tlb_single(unsigned long addr)
{
	__native_flush_tlb_single(addr);
}

/* These are in entry.S */
extern void native_iret(void);
extern void native_irq_enable_sysexit(void);

static int __init print_banner(void)
{
	pv_init_ops.banner();
	return 0;
}
core_initcall(print_banner);

static struct resource reserve_ioports = {
	.start = 0,
	.end = IO_SPACE_LIMIT,
	.name = "paravirt-ioport",
	.flags = IORESOURCE_IO | IORESOURCE_BUSY,
};

static struct resource reserve_iomem = {
	.start = 0,
	.end = -1,
	.name = "paravirt-iomem",
	.flags = IORESOURCE_MEM | IORESOURCE_BUSY,
};

/*
 * Reserve the whole legacy IO space to prevent any legacy drivers
 * from wasting time probing for their hardware.  This is a fairly
 * brute-force approach to disabling all non-virtual drivers.
 *
 * Note that this must be called very early to have any effect.
 */
int paravirt_disable_iospace(void)
{
	int ret;

	ret = request_resource(&ioport_resource, &reserve_ioports);
	if (ret == 0) {
		ret = request_resource(&iomem_resource, &reserve_iomem);
		if (ret)
			release_resource(&reserve_ioports);
	}

	return ret;
}

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 */
};

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,
	.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_cr4 = native_read_cr4,
	.read_cr4_safe = native_read_cr4_safe,
	.write_cr4 = native_write_cr4,
	.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,
	.load_tr_desc = native_load_tr_desc,
	.set_ldt = native_set_ldt,
	.load_gdt = native_load_gdt,
	.load_idt = native_load_idt,
	.store_gdt = native_store_gdt,
	.store_idt = native_store_idt,
	.store_tr = native_store_tr,
	.load_tls = native_load_tls,
	.write_ldt_entry = write_dt_entry,
	.write_gdt_entry = write_dt_entry,
	.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,
	.apic_read = native_apic_read,
	.setup_boot_clock = setup_boot_APIC_clock,
	.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,
	.flush_tlb_others = native_flush_tlb_others,

	.alloc_pt = paravirt_nop,
	.alloc_pd = paravirt_nop,
	.alloc_pd_clone = paravirt_nop,
	.release_pt = paravirt_nop,
	.release_pd = paravirt_nop,

	.set_pte = native_set_pte,
	.set_pte_at = native_set_pte_at,
	.set_pmd = native_set_pmd,
	.pte_update = paravirt_nop,
	.pte_update_defer = paravirt_nop,

#ifdef CONFIG_HIGHPTE
	.kmap_atomic_pte = kmap_atomic,
#endif

#ifdef CONFIG_X86_PAE
	.set_pte_atomic = native_set_pte_atomic,
	.set_pte_present = native_set_pte_present,
	.set_pud = native_set_pud,
	.pte_clear = native_pte_clear,
	.pmd_clear = native_pmd_clear,

	.pmd_val = native_pmd_val,
	.make_pmd = native_make_pmd,
#endif

	.pte_val = native_pte_val,
	.pgd_val = native_pgd_val,

	.make_pte = native_make_pte,
	.make_pgd = native_make_pgd,

	.dup_mmap = paravirt_nop,
	.exit_mmap = paravirt_nop,
	.activate_mm = paravirt_nop,
};

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);
Commit	Line	Data
d3561b7f RR	1	/* Paravirtualization interfaces
	2	Copyright (C) 2006 Rusty Russell IBM Corporation
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2 of the License, or
	7	(at your option) any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software
	16	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	17	*/
	18	#include <linux/errno.h>
	19	#include <linux/module.h>
	20	#include <linux/efi.h>
	21	#include <linux/bcd.h>
ce6234b5	22	#include <linux/highmem.h>
d3561b7f RR	23
	24	#include <asm/bug.h>
	25	#include <asm/paravirt.h>
	26	#include <asm/desc.h>
	27	#include <asm/setup.h>
	28	#include <asm/arch_hooks.h>
	29	#include <asm/time.h>
	30	#include <asm/irq.h>
	31	#include <asm/delay.h>
13623d79 RR	32	#include <asm/fixmap.h>
13623d79 RR	33	#include <asm/apic.h>
da181a8b	34	#include <asm/tlbflush.h>
6cb9a835	35	#include <asm/timer.h>
d3561b7f RR	36
d3561b7f RR	37	/* nop stub */
45876233	38	void _paravirt_nop(void)
d3561b7f RR	39	{
	40	}
	41
	42	static void __init default_banner(void)
	43	{
	44	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
93b1eab3	45	pv_info.name);
d3561b7f RR	46	}
	47
	48	char *memory_setup(void)
	49	{
93b1eab3	50	return pv_init_ops.memory_setup();
d3561b7f RR	51	}
d3561b7f RR	52
139ec7c4	53	/* Simple instruction patching code. */
93b1eab3 JF	54	#define DEF_NATIVE(ops, name, code) \
	55	extern const char start_##ops##_##name[], end_##ops##_##name[]; \
	56	asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
	57
	58	DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
	59	DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
	60	DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf");
	61	DEF_NATIVE(pv_irq_ops, save_fl, "pushf; pop %eax");
	62	DEF_NATIVE(pv_cpu_ops, iret, "iret");
	63	DEF_NATIVE(pv_cpu_ops, irq_enable_sysexit, "sti; sysexit");
	64	DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax");
	65	DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3");
	66	DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax");
	67	DEF_NATIVE(pv_cpu_ops, clts, "clts");
	68	DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc");
	69
	70	/* Undefined instruction for dealing with missing ops pointers. */
	71	static const unsigned char ud2a[] = { 0x0f, 0x0b };
139ec7c4	72
ab144f5e AK	73	static unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
ab144f5e AK	74	unsigned long addr, unsigned len)
139ec7c4	75	{
63f70270 JF	76	const unsigned char start, end;
	77	unsigned ret;
	78
	79	switch(type) {
93b1eab3 JF	80	#define SITE(ops, x) \
	81	case PARAVIRT_PATCH(ops.x): \
	82	start = start_##ops##_##x; \
	83	end = end_##ops##_##x; \
	84	goto patch_site
	85
	86	SITE(pv_irq_ops, irq_disable);
	87	SITE(pv_irq_ops, irq_enable);
	88	SITE(pv_irq_ops, restore_fl);
	89	SITE(pv_irq_ops, save_fl);
	90	SITE(pv_cpu_ops, iret);
	91	SITE(pv_cpu_ops, irq_enable_sysexit);
	92	SITE(pv_mmu_ops, read_cr2);
	93	SITE(pv_mmu_ops, read_cr3);
	94	SITE(pv_mmu_ops, write_cr3);
	95	SITE(pv_cpu_ops, clts);
	96	SITE(pv_cpu_ops, read_tsc);
63f70270 JF	97	#undef SITE
	98
	99	patch_site:
ab144f5e	100	ret = paravirt_patch_insns(ibuf, len, start, end);
63f70270 JF	101	break;
63f70270 JF	102
63f70270	103	default:
ab144f5e	104	ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
63f70270 JF	105	break;
	106	}
	107
	108	return ret;
	109	}
	110
	111	unsigned paravirt_patch_nop(void)
	112	{
	113	return 0;
	114	}
	115
	116	unsigned paravirt_patch_ignore(unsigned len)
	117	{
	118	return len;
	119	}
	120
19d36ccd AK	121	struct branch {
	122	unsigned char opcode;
	123	u32 delta;
	124	} __attribute__((packed));
	125
ab144f5e AK	126	unsigned paravirt_patch_call(void *insnbuf,
	127	const void *target, u16 tgt_clobbers,
	128	unsigned long addr, u16 site_clobbers,
63f70270 JF	129	unsigned len)
63f70270 JF	130	{
ab144f5e AK	131	struct branch *b = insnbuf;
ab144f5e AK	132	unsigned long delta = (unsigned long)target - (addr+5);
63f70270 JF	133
	134	if (tgt_clobbers & ~site_clobbers)
	135	return len; /* target would clobber too much for this site */
	136	if (len < 5)
	137	return len; /* call too long for patch site */
139ec7c4	138
ab144f5e AK	139	b->opcode = 0xe8; /* call */
	140	b->delta = delta;
	141	BUILD_BUG_ON(sizeof(*b) != 5);
139ec7c4	142
63f70270 JF	143	return 5;
	144	}
	145
93b1eab3	146	unsigned paravirt_patch_jmp(void insnbuf, const void target,
ab144f5e	147	unsigned long addr, unsigned len)
63f70270	148	{
ab144f5e AK	149	struct branch *b = insnbuf;
ab144f5e AK	150	unsigned long delta = (unsigned long)target - (addr+5);
63f70270 JF	151
	152	if (len < 5)
	153	return len; /* call too long for patch site */
	154
ab144f5e AK	155	b->opcode = 0xe9; /* jmp */
ab144f5e AK	156	b->delta = delta;
63f70270 JF	157
	158	return 5;
	159	}
	160
93b1eab3 JF	161	/* Neat trick to map patch type back to the call within the
	162	* corresponding structure. */
	163	static void *get_call_destination(u8 type)
	164	{
	165	struct paravirt_patch_template tmpl = {
	166	.pv_init_ops = pv_init_ops,
	167	.pv_misc_ops = pv_misc_ops,
	168	.pv_time_ops = pv_time_ops,
	169	.pv_cpu_ops = pv_cpu_ops,
	170	.pv_irq_ops = pv_irq_ops,
	171	.pv_apic_ops = pv_apic_ops,
	172	.pv_mmu_ops = pv_mmu_ops,
	173	};
	174	return ((void *)&tmpl + type);
	175	}
	176
ab144f5e AK	177	unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
ab144f5e AK	178	unsigned long addr, unsigned len)
63f70270	179	{
93b1eab3	180	void *opfunc = get_call_destination(type);
63f70270 JF	181	unsigned ret;
	182
	183	if (opfunc == NULL)
	184	/* If there's no function, patch it with a ud2a (BUG) */
93b1eab3	185	ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a));
63f70270 JF	186	else if (opfunc == paravirt_nop)
	187	/* If the operation is a nop, then nop the callsite */
	188	ret = paravirt_patch_nop();
93b1eab3 JF	189	else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) \|\|
93b1eab3 JF	190	type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit))
63f70270	191	/* If operation requires a jmp, then jmp */
93b1eab3	192	ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
63f70270 JF	193	else
	194	/* Otherwise call the function; assume target could
	195	clobber any caller-save reg */
ab144f5e AK	196	ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY,
ab144f5e AK	197	addr, clobbers, len);
63f70270 JF	198
	199	return ret;
	200	}
	201
ab144f5e	202	unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
63f70270 JF	203	const char start, const char end)
	204	{
	205	unsigned insn_len = end - start;
139ec7c4	206
63f70270 JF	207	if (insn_len > len \|\| start == NULL)
	208	insn_len = len;
	209	else
ab144f5e	210	memcpy(insnbuf, start, insn_len);
139ec7c4	211
139ec7c4 RR	212	return insn_len;
	213	}
	214
d3561b7f RR	215	void init_IRQ(void)
d3561b7f RR	216	{
93b1eab3	217	pv_irq_ops.init_IRQ();
d3561b7f RR	218	}
d3561b7f RR	219
1a1eecd1	220	static void native_flush_tlb(void)
da181a8b RR	221	{
	222	__native_flush_tlb();
	223	}
	224
	225	/*
	226	* Global pages have to be flushed a bit differently. Not a real
	227	* performance problem because this does not happen often.
	228	*/
1a1eecd1	229	static void native_flush_tlb_global(void)
da181a8b RR	230	{
	231	__native_flush_tlb_global();
	232	}
	233
63f70270	234	static void native_flush_tlb_single(unsigned long addr)
da181a8b RR	235	{
	236	__native_flush_tlb_single(addr);
	237	}
	238
d3561b7f	239	/* These are in entry.S */
1a1eecd1 AK	240	extern void native_iret(void);
1a1eecd1 AK	241	extern void native_irq_enable_sysexit(void);
d3561b7f RR	242
	243	static int __init print_banner(void)
	244	{
93b1eab3	245	pv_init_ops.banner();
d3561b7f RR	246	return 0;
	247	}
	248	core_initcall(print_banner);
	249
d572929c JF	250	static struct resource reserve_ioports = {
	251	.start = 0,
	252	.end = IO_SPACE_LIMIT,
	253	.name = "paravirt-ioport",
	254	.flags = IORESOURCE_IO \| IORESOURCE_BUSY,
	255	};
	256
	257	static struct resource reserve_iomem = {
	258	.start = 0,
	259	.end = -1,
	260	.name = "paravirt-iomem",
	261	.flags = IORESOURCE_MEM \| IORESOURCE_BUSY,
	262	};
	263
	264	/*
	265	* Reserve the whole legacy IO space to prevent any legacy drivers
	266	* from wasting time probing for their hardware. This is a fairly
	267	* brute-force approach to disabling all non-virtual drivers.
	268	*
	269	* Note that this must be called very early to have any effect.
	270	*/
	271	int paravirt_disable_iospace(void)
	272	{
	273	int ret;
	274
	275	ret = request_resource(&ioport_resource, &reserve_ioports);
	276	if (ret == 0) {
	277	ret = request_resource(&iomem_resource, &reserve_iomem);
	278	if (ret)
	279	release_resource(&reserve_ioports);
	280	}
	281
	282	return ret;
	283	}
	284
93b1eab3	285	struct pv_info pv_info = {
d3561b7f RR	286	.name = "bare hardware",
	287	.paravirt_enabled = 0,
	288	.kernel_rpl = 0,
5311ab62	289	.shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */
93b1eab3	290	};
d3561b7f	291
93b1eab3 JF	292	struct pv_init_ops pv_init_ops = {
93b1eab3 JF	293	.patch = native_patch,
d3561b7f	294	.banner = default_banner,
45876233	295	.arch_setup = paravirt_nop,
d3561b7f	296	.memory_setup = machine_specific_memory_setup,
93b1eab3 JF	297	};
	298
	299	struct pv_time_ops pv_time_ops = {
	300	.time_init = hpet_time_init,
d3561b7f RR	301	.get_wallclock = native_get_wallclock,
d3561b7f RR	302	.set_wallclock = native_set_wallclock,
93b1eab3 JF	303	.sched_clock = native_sched_clock,
	304	.get_cpu_khz = native_calculate_cpu_khz,
	305	};
	306
	307	struct pv_irq_ops pv_irq_ops = {
d3561b7f	308	.init_IRQ = native_init_IRQ,
93b1eab3 JF	309	.save_fl = native_save_fl,
	310	.restore_fl = native_restore_fl,
	311	.irq_disable = native_irq_disable,
	312	.irq_enable = native_irq_enable,
	313	.safe_halt = native_safe_halt,
	314	.halt = native_halt,
	315	};
d3561b7f	316
93b1eab3	317	struct pv_cpu_ops pv_cpu_ops = {
d3561b7f RR	318	.cpuid = native_cpuid,
	319	.get_debugreg = native_get_debugreg,
	320	.set_debugreg = native_set_debugreg,
	321	.clts = native_clts,
	322	.read_cr0 = native_read_cr0,
	323	.write_cr0 = native_write_cr0,
d3561b7f RR	324	.read_cr4 = native_read_cr4,
	325	.read_cr4_safe = native_read_cr4_safe,
	326	.write_cr4 = native_write_cr4,
d3561b7f	327	.wbinvd = native_wbinvd,
90a0a06a RR	328	.read_msr = native_read_msr_safe,
90a0a06a RR	329	.write_msr = native_write_msr_safe,
d3561b7f RR	330	.read_tsc = native_read_tsc,
	331	.read_pmc = native_read_pmc,
	332	.load_tr_desc = native_load_tr_desc,
	333	.set_ldt = native_set_ldt,
	334	.load_gdt = native_load_gdt,
	335	.load_idt = native_load_idt,
	336	.store_gdt = native_store_gdt,
	337	.store_idt = native_store_idt,
	338	.store_tr = native_store_tr,
	339	.load_tls = native_load_tls,
90a0a06a RR	340	.write_ldt_entry = write_dt_entry,
	341	.write_gdt_entry = write_dt_entry,
	342	.write_idt_entry = write_dt_entry,
d3561b7f RR	343	.load_esp0 = native_load_esp0,
d3561b7f RR	344
93b1eab3 JF	345	.irq_enable_sysexit = native_irq_enable_sysexit,
	346	.iret = native_iret,
	347
d3561b7f RR	348	.set_iopl_mask = native_set_iopl_mask,
d3561b7f RR	349	.io_delay = native_io_delay,
93b1eab3	350	};
d3561b7f	351
93b1eab3	352	struct pv_apic_ops pv_apic_ops = {
13623d79 RR	353	#ifdef CONFIG_X86_LOCAL_APIC
	354	.apic_write = native_apic_write,
	355	.apic_write_atomic = native_apic_write_atomic,
	356	.apic_read = native_apic_read,
bbab4f3b ZA	357	.setup_boot_clock = setup_boot_APIC_clock,
bbab4f3b ZA	358	.setup_secondary_clock = setup_secondary_APIC_clock,
0260c196	359	.startup_ipi_hook = paravirt_nop,
13623d79	360	#endif
93b1eab3 JF	361	};
	362
	363	struct pv_misc_ops pv_misc_ops = {
45876233	364	.set_lazy_mode = paravirt_nop,
93b1eab3	365	};
13623d79	366
93b1eab3	367	struct pv_mmu_ops pv_mmu_ops = {
b239fb25 JF	368	.pagetable_setup_start = native_pagetable_setup_start,
	369	.pagetable_setup_done = native_pagetable_setup_done,
	370
93b1eab3 JF	371	.read_cr2 = native_read_cr2,
	372	.write_cr2 = native_write_cr2,
	373	.read_cr3 = native_read_cr3,
	374	.write_cr3 = native_write_cr3,
	375
da181a8b RR	376	.flush_tlb_user = native_flush_tlb,
	377	.flush_tlb_kernel = native_flush_tlb_global,
	378	.flush_tlb_single = native_flush_tlb_single,
d4c10477	379	.flush_tlb_others = native_flush_tlb_others,
da181a8b	380
45876233 JF	381	.alloc_pt = paravirt_nop,
	382	.alloc_pd = paravirt_nop,
	383	.alloc_pd_clone = paravirt_nop,
	384	.release_pt = paravirt_nop,
	385	.release_pd = paravirt_nop,
c119ecce	386
da181a8b RR	387	.set_pte = native_set_pte,
	388	.set_pte_at = native_set_pte_at,
	389	.set_pmd = native_set_pmd,
45876233 JF	390	.pte_update = paravirt_nop,
45876233 JF	391	.pte_update_defer = paravirt_nop,
3dc494e8	392
ce6234b5 JF	393	#ifdef CONFIG_HIGHPTE
	394	.kmap_atomic_pte = kmap_atomic,
	395	#endif
	396
da181a8b RR	397	#ifdef CONFIG_X86_PAE
	398	.set_pte_atomic = native_set_pte_atomic,
	399	.set_pte_present = native_set_pte_present,
	400	.set_pud = native_set_pud,
	401	.pte_clear = native_pte_clear,
	402	.pmd_clear = native_pmd_clear,
3dc494e8 JF	403
	404	.pmd_val = native_pmd_val,
	405	.make_pmd = native_make_pmd,
da181a8b RR	406	#endif
da181a8b RR	407
3dc494e8 JF	408	.pte_val = native_pte_val,
	409	.pgd_val = native_pgd_val,
	410
	411	.make_pte = native_make_pte,
	412	.make_pgd = native_make_pgd,
	413
d6dd61c8 JF	414	.dup_mmap = paravirt_nop,
	415	.exit_mmap = paravirt_nop,
	416	.activate_mm = paravirt_nop,
d3561b7f	417	};
0dbe5a11	418
93b1eab3 JF	419	EXPORT_SYMBOL_GPL(pv_time_ops);
	420	EXPORT_SYMBOL_GPL(pv_cpu_ops);
	421	EXPORT_SYMBOL_GPL(pv_mmu_ops);
	422	EXPORT_SYMBOL_GPL(pv_apic_ops);
	423	EXPORT_SYMBOL_GPL(pv_info);
	424	EXPORT_SYMBOL (pv_irq_ops);