i386: prepare shared kernel/paravirt.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 392 deletions

diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c
deleted file mode 100644
index 739cfb207dd7..000000000000
--- a/arch/i386/kernel/paravirt.c
+++ /dev/null
@@ -1,392 +0,0 @@
-/*  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",
-	       paravirt_ops.name);
-}
-
-char *memory_setup(void)
-{
-	return paravirt_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");
-
-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(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);
-#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;
-	}
-
-	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(const void *target, void *insnbuf,
-			    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;
-}
-
-unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
-				unsigned long addr, unsigned len)
-{
-	void *opfunc = *((void **)&paravirt_ops + 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);
-	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))
-		/* If operation requires a jmp, then jmp */
-		ret = paravirt_patch_jmp(opfunc, insnbuf, 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)
-{
-	paravirt_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)
-{
-	paravirt_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 paravirt_ops paravirt_ops = {
-	.name = "bare hardware",
-	.paravirt_enabled = 0,
-	.kernel_rpl = 0,
-	.shared_kernel_pmd = 1,	/* Only used when CONFIG_X86_PAE is set */
-
- 	.patch = native_patch,
-	.banner = default_banner,
-	.arch_setup = paravirt_nop,
-	.memory_setup = machine_specific_memory_setup,
-	.get_wallclock = native_get_wallclock,
-	.set_wallclock = native_set_wallclock,
-	.time_init = hpet_time_init,
-	.init_IRQ = native_init_IRQ,
-
-	.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,
-	.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,
-
-	.set_iopl_mask = native_set_iopl_mask,
-	.io_delay = native_io_delay,
-
-#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
-	.set_lazy_mode = paravirt_nop,
-
-	.pagetable_setup_start = native_pagetable_setup_start,
-	.pagetable_setup_done = native_pagetable_setup_done,
-
-	.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,
-
-	.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);