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[PATCH] paravirt: header and stubs for paravirtualisation
Create a paravirt.h header for all the critical operations which need to be
replaced with hypervisor calls, and include that instead of defining native
operations, when CONFIG_PARAVIRT.
This patch does the dumbest possible replacement of paravirtualized
instructions: calls through a "paravirt_ops" structure. Currently these are
function implementations of native hardware: hypervisors will override the ops
structure with their own variants.
All the pv-ops functions are declared "fastcall" so that a specific
register-based ABI is used, to make inlining assember easier.
And:
+From: Andy Whitcroft <apw@shadowen.org>
The paravirt ops introduce a 'weak' attribute onto memory_setup().
Code ordering leads to the following warnings on x86:
arch/i386/kernel/setup.c:651: warning: weak declaration of
`memory_setup' after first use results in unspecified behavior
Move memory_setup() to avoid this.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
This commit is contained in:
Rusty Russell
Andi Kleen
parent
db91b882aa
commit
d3561b7fa0
@ -182,6 +182,17 @@ config X86_ES7000
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endchoice
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config PARAVIRT
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bool "Paravirtualization support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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help
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Paravirtualization is a way of running multiple instances of
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Linux on the same machine, under a hypervisor. This option
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changes the kernel so it can modify itself when it is run
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under a hypervisor, improving performance significantly.
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However, when run without a hypervisor the kernel is
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theoretically slower. If in doubt, say N.
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config ACPI_SRAT
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bool
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default y
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@ -9,6 +9,7 @@
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* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
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*/
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#undef CONFIG_PARAVIRT
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#include <linux/linkage.h>
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#include <linux/vmalloc.h>
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#include <linux/screen_info.h>
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@ -39,6 +39,7 @@ obj-$(CONFIG_VM86) += vm86.o
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obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
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obj-$(CONFIG_HPET_TIMER) += hpet.o
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obj-$(CONFIG_K8_NB) += k8.o
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obj-$(CONFIG_PARAVIRT) += paravirt.o
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EXTRA_AFLAGS := -traditional
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@ -101,4 +101,14 @@ void foo(void)
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BLANK();
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OFFSET(PDA_cpu, i386_pda, cpu_number);
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OFFSET(PDA_pcurrent, i386_pda, pcurrent);
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#ifdef CONFIG_PARAVIRT
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BLANK();
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OFFSET(PARAVIRT_enabled, paravirt_ops, paravirt_enabled);
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OFFSET(PARAVIRT_irq_disable, paravirt_ops, irq_disable);
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OFFSET(PARAVIRT_irq_enable, paravirt_ops, irq_enable);
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OFFSET(PARAVIRT_irq_enable_sysexit, paravirt_ops, irq_enable_sysexit);
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OFFSET(PARAVIRT_iret, paravirt_ops, iret);
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OFFSET(PARAVIRT_read_cr0, paravirt_ops, read_cr0);
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#endif
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}
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@ -62,13 +62,6 @@ DF_MASK = 0x00000400
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NT_MASK = 0x00004000
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VM_MASK = 0x00020000
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/* These are replaces for paravirtualization */
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#define DISABLE_INTERRUPTS cli
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#define ENABLE_INTERRUPTS sti
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#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
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#define INTERRUPT_RETURN iret
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#define GET_CR0_INTO_EAX movl %cr0, %eax
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#ifdef CONFIG_PREEMPT
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#define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF
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#else
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@ -416,6 +409,20 @@ ldt_ss:
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jnz restore_nocheck
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testl $0x00400000, %eax # returning to 32bit stack?
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jnz restore_nocheck # allright, normal return
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#ifdef CONFIG_PARAVIRT
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/*
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* The kernel can't run on a non-flat stack if paravirt mode
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* is active. Rather than try to fixup the high bits of
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* ESP, bypass this code entirely. This may break DOSemu
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* and/or Wine support in a paravirt VM, although the option
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* is still available to implement the setting of the high
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* 16-bits in the INTERRUPT_RETURN paravirt-op.
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*/
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cmpl $0, paravirt_ops+PARAVIRT_enabled
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jne restore_nocheck
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#endif
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/* If returning to userspace with 16bit stack,
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* try to fix the higher word of ESP, as the CPU
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* won't restore it.
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@ -833,6 +840,19 @@ nmi_espfix_stack:
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.previous
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KPROBE_END(nmi)
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#ifdef CONFIG_PARAVIRT
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ENTRY(native_iret)
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1: iret
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.section __ex_table,"a"
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.align 4
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.long 1b,iret_exc
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.previous
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ENTRY(native_irq_enable_sysexit)
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sti
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sysexit
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#endif
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KPROBE_ENTRY(int3)
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RING0_INT_FRAME
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pushl $-1 # mark this as an int
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@ -381,7 +381,10 @@ void __init init_ISA_irqs (void)
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}
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}
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void __init init_IRQ(void)
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/* Overridden in paravirt.c */
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void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
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void __init native_init_IRQ(void)
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{
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int i;
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404
arch/i386/kernel/paravirt.c
Normal file
404
arch/i386/kernel/paravirt.c
Normal file
@ -0,0 +1,404 @@
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/* Paravirtualization interfaces
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Copyright (C) 2006 Rusty Russell IBM Corporation
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/efi.h>
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#include <linux/bcd.h>
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#include <asm/bug.h>
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#include <asm/paravirt.h>
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#include <asm/desc.h>
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#include <asm/setup.h>
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#include <asm/arch_hooks.h>
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#include <asm/time.h>
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#include <asm/irq.h>
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#include <asm/delay.h>
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/* nop stub */
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static void native_nop(void)
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{
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}
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static void __init default_banner(void)
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{
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printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
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paravirt_ops.name);
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}
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char *memory_setup(void)
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{
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return paravirt_ops.memory_setup();
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}
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static fastcall unsigned long native_get_debugreg(int regno)
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{
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unsigned long val = 0; /* Damn you, gcc! */
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switch (regno) {
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case 0:
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asm("movl %%db0, %0" :"=r" (val)); break;
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case 1:
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asm("movl %%db1, %0" :"=r" (val)); break;
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case 2:
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asm("movl %%db2, %0" :"=r" (val)); break;
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case 3:
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asm("movl %%db3, %0" :"=r" (val)); break;
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case 6:
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asm("movl %%db6, %0" :"=r" (val)); break;
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case 7:
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asm("movl %%db7, %0" :"=r" (val)); break;
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default:
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BUG();
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}
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return val;
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}
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static fastcall void native_set_debugreg(int regno, unsigned long value)
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{
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switch (regno) {
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case 0:
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asm("movl %0,%%db0" : /* no output */ :"r" (value));
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break;
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case 1:
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asm("movl %0,%%db1" : /* no output */ :"r" (value));
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break;
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case 2:
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asm("movl %0,%%db2" : /* no output */ :"r" (value));
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break;
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case 3:
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asm("movl %0,%%db3" : /* no output */ :"r" (value));
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break;
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case 6:
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asm("movl %0,%%db6" : /* no output */ :"r" (value));
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break;
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case 7:
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asm("movl %0,%%db7" : /* no output */ :"r" (value));
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break;
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default:
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BUG();
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}
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}
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void init_IRQ(void)
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{
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paravirt_ops.init_IRQ();
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}
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static fastcall void native_clts(void)
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{
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asm volatile ("clts");
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}
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static fastcall unsigned long native_read_cr0(void)
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{
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unsigned long val;
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asm volatile("movl %%cr0,%0\n\t" :"=r" (val));
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return val;
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}
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static fastcall void native_write_cr0(unsigned long val)
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{
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asm volatile("movl %0,%%cr0": :"r" (val));
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}
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static fastcall unsigned long native_read_cr2(void)
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{
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unsigned long val;
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asm volatile("movl %%cr2,%0\n\t" :"=r" (val));
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return val;
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}
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static fastcall void native_write_cr2(unsigned long val)
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{
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asm volatile("movl %0,%%cr2": :"r" (val));
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}
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static fastcall unsigned long native_read_cr3(void)
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{
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unsigned long val;
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asm volatile("movl %%cr3,%0\n\t" :"=r" (val));
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return val;
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}
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static fastcall void native_write_cr3(unsigned long val)
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{
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asm volatile("movl %0,%%cr3": :"r" (val));
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}
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static fastcall unsigned long native_read_cr4(void)
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{
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unsigned long val;
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asm volatile("movl %%cr4,%0\n\t" :"=r" (val));
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return val;
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}
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static fastcall unsigned long native_read_cr4_safe(void)
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{
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unsigned long val;
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/* This could fault if %cr4 does not exist */
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asm("1: movl %%cr4, %0 \n"
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"2: \n"
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".section __ex_table,\"a\" \n"
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".long 1b,2b \n"
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".previous \n"
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: "=r" (val): "0" (0));
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return val;
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}
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static fastcall void native_write_cr4(unsigned long val)
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{
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asm volatile("movl %0,%%cr4": :"r" (val));
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}
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static fastcall unsigned long native_save_fl(void)
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{
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unsigned long f;
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asm volatile("pushfl ; popl %0":"=g" (f): /* no input */);
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return f;
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}
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static fastcall void native_restore_fl(unsigned long f)
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{
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asm volatile("pushl %0 ; popfl": /* no output */
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:"g" (f)
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:"memory", "cc");
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}
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static fastcall void native_irq_disable(void)
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{
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asm volatile("cli": : :"memory");
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}
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static fastcall void native_irq_enable(void)
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{
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asm volatile("sti": : :"memory");
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}
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static fastcall void native_safe_halt(void)
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{
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asm volatile("sti; hlt": : :"memory");
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}
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static fastcall void native_halt(void)
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{
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asm volatile("hlt": : :"memory");
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}
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static fastcall void native_wbinvd(void)
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{
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asm volatile("wbinvd": : :"memory");
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}
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static fastcall unsigned long long native_read_msr(unsigned int msr, int *err)
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{
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unsigned long long val;
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asm volatile("2: rdmsr ; xorl %0,%0\n"
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"1:\n\t"
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".section .fixup,\"ax\"\n\t"
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"3: movl %3,%0 ; jmp 1b\n\t"
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".previous\n\t"
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".section __ex_table,\"a\"\n"
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" .align 4\n\t"
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" .long 2b,3b\n\t"
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".previous"
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: "=r" (*err), "=A" (val)
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: "c" (msr), "i" (-EFAULT));
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return val;
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}
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static fastcall int native_write_msr(unsigned int msr, unsigned long long val)
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{
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int err;
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asm volatile("2: wrmsr ; xorl %0,%0\n"
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"1:\n\t"
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".section .fixup,\"ax\"\n\t"
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"3: movl %4,%0 ; jmp 1b\n\t"
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".previous\n\t"
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".section __ex_table,\"a\"\n"
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" .align 4\n\t"
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" .long 2b,3b\n\t"
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".previous"
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: "=a" (err)
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: "c" (msr), "0" ((u32)val), "d" ((u32)(val>>32)),
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"i" (-EFAULT));
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return err;
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}
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static fastcall unsigned long long native_read_tsc(void)
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{
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unsigned long long val;
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asm volatile("rdtsc" : "=A" (val));
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return val;
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}
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static fastcall unsigned long long native_read_pmc(void)
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{
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unsigned long long val;
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asm volatile("rdpmc" : "=A" (val));
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return val;
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}
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static fastcall void native_load_tr_desc(void)
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{
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asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
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}
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static fastcall void native_load_gdt(const struct Xgt_desc_struct *dtr)
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{
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asm volatile("lgdt %0"::"m" (*dtr));
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}
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static fastcall void native_load_idt(const struct Xgt_desc_struct *dtr)
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{
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asm volatile("lidt %0"::"m" (*dtr));
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}
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static fastcall void native_store_gdt(struct Xgt_desc_struct *dtr)
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{
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asm ("sgdt %0":"=m" (*dtr));
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}
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static fastcall void native_store_idt(struct Xgt_desc_struct *dtr)
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{
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asm ("sidt %0":"=m" (*dtr));
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}
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static fastcall unsigned long native_store_tr(void)
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{
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unsigned long tr;
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asm ("str %0":"=r" (tr));
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return tr;
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}
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static fastcall void native_load_tls(struct thread_struct *t, unsigned int cpu)
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{
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#define C(i) get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i]
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C(0); C(1); C(2);
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#undef C
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}
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static inline void native_write_dt_entry(void *dt, int entry, u32 entry_low, u32 entry_high)
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{
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u32 *lp = (u32 *)((char *)dt + entry*8);
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lp[0] = entry_low;
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lp[1] = entry_high;
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}
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static fastcall void native_write_ldt_entry(void *dt, int entrynum, u32 low, u32 high)
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{
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native_write_dt_entry(dt, entrynum, low, high);
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}
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static fastcall void native_write_gdt_entry(void *dt, int entrynum, u32 low, u32 high)
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{
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native_write_dt_entry(dt, entrynum, low, high);
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}
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static fastcall void native_write_idt_entry(void *dt, int entrynum, u32 low, u32 high)
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{
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native_write_dt_entry(dt, entrynum, low, high);
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}
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static fastcall void native_load_esp0(struct tss_struct *tss,
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struct thread_struct *thread)
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{
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tss->esp0 = thread->esp0;
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/* This can only happen when SEP is enabled, no need to test "SEP"arately */
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if (unlikely(tss->ss1 != thread->sysenter_cs)) {
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tss->ss1 = thread->sysenter_cs;
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wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
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}
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}
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static fastcall void native_io_delay(void)
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{
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asm volatile("outb %al,$0x80");
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}
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/* These are in entry.S */
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extern fastcall void native_iret(void);
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extern fastcall void native_irq_enable_sysexit(void);
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static int __init print_banner(void)
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{
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paravirt_ops.banner();
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return 0;
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}
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core_initcall(print_banner);
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||||
|
||||
struct paravirt_ops paravirt_ops = {
|
||||
.name = "bare hardware",
|
||||
.paravirt_enabled = 0,
|
||||
.kernel_rpl = 0,
|
||||
|
||||
.banner = default_banner,
|
||||
.arch_setup = native_nop,
|
||||
.memory_setup = machine_specific_memory_setup,
|
||||
.get_wallclock = native_get_wallclock,
|
||||
.set_wallclock = native_set_wallclock,
|
||||
.time_init = time_init_hook,
|
||||
.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,
|
||||
.write_msr = native_write_msr,
|
||||
.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 = native_write_ldt_entry,
|
||||
.write_gdt_entry = native_write_gdt_entry,
|
||||
.write_idt_entry = native_write_idt_entry,
|
||||
.load_esp0 = native_load_esp0,
|
||||
|
||||
.set_iopl_mask = native_set_iopl_mask,
|
||||
.io_delay = native_io_delay,
|
||||
.const_udelay = __const_udelay,
|
||||
|
||||
.irq_enable_sysexit = native_irq_enable_sysexit,
|
||||
.iret = native_iret,
|
||||
};
|
||||
EXPORT_SYMBOL(paravirt_ops);
|
||||
@ -495,6 +495,12 @@ static void set_mca_bus(int x)
|
||||
static void set_mca_bus(int x) { }
|
||||
#endif
|
||||
|
||||
/* Overridden in paravirt.c if CONFIG_PARAVIRT */
|
||||
char * __attribute__((weak)) memory_setup(void)
|
||||
{
|
||||
return machine_specific_memory_setup();
|
||||
}
|
||||
|
||||
/*
|
||||
* Determine if we were loaded by an EFI loader. If so, then we have also been
|
||||
* passed the efi memmap, systab, etc., so we should use these data structures
|
||||
@ -547,7 +553,7 @@ void __init setup_arch(char **cmdline_p)
|
||||
efi_init();
|
||||
else {
|
||||
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
|
||||
print_memory_map(machine_specific_memory_setup());
|
||||
print_memory_map(memory_setup());
|
||||
}
|
||||
|
||||
copy_edd();
|
||||
|
||||
@ -33,6 +33,11 @@
|
||||
* Dave Jones : Report invalid combinations of Athlon CPUs.
|
||||
* Rusty Russell : Hacked into shape for new "hotplug" boot process. */
|
||||
|
||||
|
||||
/* SMP boot always wants to use real time delay to allow sufficient time for
|
||||
* the APs to come online */
|
||||
#define USE_REAL_TIME_DELAY
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
|
||||
@ -56,6 +56,7 @@
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/processor.h>
|
||||
#include <asm/timer.h>
|
||||
#include <asm/time.h>
|
||||
|
||||
#include "mach_time.h"
|
||||
|
||||
@ -116,10 +117,7 @@ static int set_rtc_mmss(unsigned long nowtime)
|
||||
/* gets recalled with irq locally disabled */
|
||||
/* XXX - does irqsave resolve this? -johnstul */
|
||||
spin_lock_irqsave(&rtc_lock, flags);
|
||||
if (efi_enabled)
|
||||
retval = efi_set_rtc_mmss(nowtime);
|
||||
else
|
||||
retval = mach_set_rtc_mmss(nowtime);
|
||||
retval = set_wallclock(nowtime);
|
||||
spin_unlock_irqrestore(&rtc_lock, flags);
|
||||
|
||||
return retval;
|
||||
@ -223,10 +221,7 @@ unsigned long get_cmos_time(void)
|
||||
|
||||
spin_lock_irqsave(&rtc_lock, flags);
|
||||
|
||||
if (efi_enabled)
|
||||
retval = efi_get_time();
|
||||
else
|
||||
retval = mach_get_cmos_time();
|
||||
retval = get_wallclock();
|
||||
|
||||
spin_unlock_irqrestore(&rtc_lock, flags);
|
||||
|
||||
@ -370,7 +365,7 @@ static void __init hpet_time_init(void)
|
||||
printk("Using HPET for base-timer\n");
|
||||
}
|
||||
|
||||
time_init_hook();
|
||||
do_time_init();
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -392,5 +387,5 @@ void __init time_init(void)
|
||||
|
||||
do_settimeofday(&ts);
|
||||
|
||||
time_init_hook();
|
||||
do_time_init();
|
||||
}
|
||||
|
||||
@ -26,8 +26,8 @@ void __save_processor_state(struct saved_context *ctxt)
|
||||
/*
|
||||
* descriptor tables
|
||||
*/
|
||||
store_gdt(&ctxt->gdt_limit);
|
||||
store_idt(&ctxt->idt_limit);
|
||||
store_gdt(&ctxt->gdt);
|
||||
store_idt(&ctxt->idt);
|
||||
store_tr(ctxt->tr);
|
||||
|
||||
/*
|
||||
@ -99,8 +99,8 @@ void __restore_processor_state(struct saved_context *ctxt)
|
||||
* now restore the descriptor tables to their proper values
|
||||
* ltr is done i fix_processor_context().
|
||||
*/
|
||||
load_gdt(&ctxt->gdt_limit);
|
||||
load_idt(&ctxt->idt_limit);
|
||||
load_gdt(&ctxt->gdt);
|
||||
load_idt(&ctxt->idt);
|
||||
|
||||
/*
|
||||
* segment registers
|
||||
|
||||
@ -43,7 +43,6 @@ static const char version[] = "de600.c: $Revision: 1.41-2.5 $, Bjorn Ekwall (bj
|
||||
* modify the following "#define": (see <asm/io.h> for more info)
|
||||
#define REALLY_SLOW_IO
|
||||
*/
|
||||
#define SLOW_IO_BY_JUMPING /* Looks "better" than dummy write to port 0x80 :-) */
|
||||
|
||||
/* use 0 for production, 1 for verification, >2 for debug */
|
||||
#ifdef DE600_DEBUG
|
||||
|
||||
@ -16,6 +16,13 @@ extern void __ndelay(unsigned long nsecs);
|
||||
extern void __const_udelay(unsigned long usecs);
|
||||
extern void __delay(unsigned long loops);
|
||||
|
||||
#if defined(CONFIG_PARAVIRT) && !defined(USE_REAL_TIME_DELAY)
|
||||
#define udelay(n) paravirt_ops.const_udelay((n) * 0x10c7ul)
|
||||
|
||||
#define ndelay(n) paravirt_ops.const_udelay((n) * 5ul)
|
||||
|
||||
#else /* !PARAVIRT || USE_REAL_TIME_DELAY */
|
||||
|
||||
/* 0x10c7 is 2**32 / 1000000 (rounded up) */
|
||||
#define udelay(n) (__builtin_constant_p(n) ? \
|
||||
((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
|
||||
@ -25,6 +32,7 @@ extern void __delay(unsigned long loops);
|
||||
#define ndelay(n) (__builtin_constant_p(n) ? \
|
||||
((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
|
||||
__ndelay(n))
|
||||
#endif
|
||||
|
||||
void use_tsc_delay(void);
|
||||
|
||||
|
||||
@ -55,6 +55,9 @@ static inline void pack_gate(__u32 *a, __u32 *b,
|
||||
#define DESCTYPE_DPL3 0x60 /* DPL-3 */
|
||||
#define DESCTYPE_S 0x10 /* !system */
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
|
||||
|
||||
#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
|
||||
@ -105,7 +108,11 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
|
||||
write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
|
||||
}
|
||||
|
||||
static inline void set_ldt(void *addr, unsigned int entries)
|
||||
#define set_ldt native_set_ldt
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
|
||||
static inline fastcall void native_set_ldt(const void *addr,
|
||||
unsigned int entries)
|
||||
{
|
||||
if (likely(entries == 0))
|
||||
__asm__ __volatile__("lldt %w0"::"q" (0));
|
||||
|
||||
@ -256,11 +256,11 @@ static inline void flush_write_buffers(void)
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#ifdef SLOW_IO_BY_JUMPING
|
||||
#define __SLOW_DOWN_IO "jmp 1f; 1: jmp 1f; 1:"
|
||||
#if defined(CONFIG_PARAVIRT)
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
|
||||
#define __SLOW_DOWN_IO "outb %%al,$0x80;"
|
||||
#endif
|
||||
|
||||
static inline void slow_down_io(void) {
|
||||
__asm__ __volatile__(
|
||||
@ -271,6 +271,8 @@ static inline void slow_down_io(void) {
|
||||
: : );
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_X86_NUMAQ
|
||||
extern void *xquad_portio; /* Where the IO area was mapped */
|
||||
#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
|
||||
|
||||
@ -41,4 +41,7 @@ extern int irqbalance_disable(char *str);
|
||||
extern void fixup_irqs(cpumask_t map);
|
||||
#endif
|
||||
|
||||
void init_IRQ(void);
|
||||
void __init native_init_IRQ(void);
|
||||
|
||||
#endif /* _ASM_IRQ_H */
|
||||
|
||||
@ -10,6 +10,9 @@
|
||||
#ifndef _ASM_IRQFLAGS_H
|
||||
#define _ASM_IRQFLAGS_H
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
static inline unsigned long __raw_local_save_flags(void)
|
||||
@ -25,9 +28,6 @@ static inline unsigned long __raw_local_save_flags(void)
|
||||
return flags;
|
||||
}
|
||||
|
||||
#define raw_local_save_flags(flags) \
|
||||
do { (flags) = __raw_local_save_flags(); } while (0)
|
||||
|
||||
static inline void raw_local_irq_restore(unsigned long flags)
|
||||
{
|
||||
__asm__ __volatile__(
|
||||
@ -66,18 +66,6 @@ static inline void halt(void)
|
||||
__asm__ __volatile__("hlt": : :"memory");
|
||||
}
|
||||
|
||||
static inline int raw_irqs_disabled_flags(unsigned long flags)
|
||||
{
|
||||
return !(flags & (1 << 9));
|
||||
}
|
||||
|
||||
static inline int raw_irqs_disabled(void)
|
||||
{
|
||||
unsigned long flags = __raw_local_save_flags();
|
||||
|
||||
return raw_irqs_disabled_flags(flags);
|
||||
}
|
||||
|
||||
/*
|
||||
* For spinlocks, etc:
|
||||
*/
|
||||
@ -90,9 +78,33 @@ static inline unsigned long __raw_local_irq_save(void)
|
||||
return flags;
|
||||
}
|
||||
|
||||
#else
|
||||
#define DISABLE_INTERRUPTS cli
|
||||
#define ENABLE_INTERRUPTS sti
|
||||
#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
|
||||
#define INTERRUPT_RETURN iret
|
||||
#define GET_CR0_INTO_EAX movl %cr0, %eax
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
#define raw_local_save_flags(flags) \
|
||||
do { (flags) = __raw_local_save_flags(); } while (0)
|
||||
|
||||
#define raw_local_irq_save(flags) \
|
||||
do { (flags) = __raw_local_irq_save(); } while (0)
|
||||
|
||||
static inline int raw_irqs_disabled_flags(unsigned long flags)
|
||||
{
|
||||
return !(flags & (1 << 9));
|
||||
}
|
||||
|
||||
static inline int raw_irqs_disabled(void)
|
||||
{
|
||||
unsigned long flags = __raw_local_save_flags();
|
||||
|
||||
return raw_irqs_disabled_flags(flags);
|
||||
}
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
/*
|
||||
|
||||
@ -2,4 +2,6 @@
|
||||
|
||||
/* no action for generic */
|
||||
|
||||
#ifndef ARCH_SETUP
|
||||
#define ARCH_SETUP
|
||||
#endif
|
||||
|
||||
@ -1,6 +1,10 @@
|
||||
#ifndef __ASM_MSR_H
|
||||
#define __ASM_MSR_H
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
|
||||
/*
|
||||
* Access to machine-specific registers (available on 586 and better only)
|
||||
* Note: the rd* operations modify the parameters directly (without using
|
||||
@ -77,6 +81,7 @@ static inline void wrmsrl (unsigned long msr, unsigned long long val)
|
||||
__asm__ __volatile__("rdpmc" \
|
||||
: "=a" (low), "=d" (high) \
|
||||
: "c" (counter))
|
||||
#endif /* !CONFIG_PARAVIRT */
|
||||
|
||||
/* symbolic names for some interesting MSRs */
|
||||
/* Intel defined MSRs. */
|
||||
|
||||
281
include/asm-i386/paravirt.h
Normal file
281
include/asm-i386/paravirt.h
Normal file
@ -0,0 +1,281 @@
|
||||
#ifndef __ASM_PARAVIRT_H
|
||||
#define __ASM_PARAVIRT_H
|
||||
/* Various instructions on x86 need to be replaced for
|
||||
* para-virtualization: those hooks are defined here. */
|
||||
#include <linux/linkage.h>
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#ifndef __ASSEMBLY__
|
||||
struct thread_struct;
|
||||
struct Xgt_desc_struct;
|
||||
struct tss_struct;
|
||||
struct paravirt_ops
|
||||
{
|
||||
unsigned int kernel_rpl;
|
||||
int paravirt_enabled;
|
||||
const char *name;
|
||||
|
||||
void (*arch_setup)(void);
|
||||
char *(*memory_setup)(void);
|
||||
void (*init_IRQ)(void);
|
||||
|
||||
void (*banner)(void);
|
||||
|
||||
unsigned long (*get_wallclock)(void);
|
||||
int (*set_wallclock)(unsigned long);
|
||||
void (*time_init)(void);
|
||||
|
||||
/* All the function pointers here are declared as "fastcall"
|
||||
so that we get a specific register-based calling
|
||||
convention. This makes it easier to implement inline
|
||||
assembler replacements. */
|
||||
|
||||
void (fastcall *cpuid)(unsigned int *eax, unsigned int *ebx,
|
||||
unsigned int *ecx, unsigned int *edx);
|
||||
|
||||
unsigned long (fastcall *get_debugreg)(int regno);
|
||||
void (fastcall *set_debugreg)(int regno, unsigned long value);
|
||||
|
||||
void (fastcall *clts)(void);
|
||||
|
||||
unsigned long (fastcall *read_cr0)(void);
|
||||
void (fastcall *write_cr0)(unsigned long);
|
||||
|
||||
unsigned long (fastcall *read_cr2)(void);
|
||||
void (fastcall *write_cr2)(unsigned long);
|
||||
|
||||
unsigned long (fastcall *read_cr3)(void);
|
||||
void (fastcall *write_cr3)(unsigned long);
|
||||
|
||||
unsigned long (fastcall *read_cr4_safe)(void);
|
||||
unsigned long (fastcall *read_cr4)(void);
|
||||
void (fastcall *write_cr4)(unsigned long);
|
||||
|
||||
unsigned long (fastcall *save_fl)(void);
|
||||
void (fastcall *restore_fl)(unsigned long);
|
||||
void (fastcall *irq_disable)(void);
|
||||
void (fastcall *irq_enable)(void);
|
||||
void (fastcall *safe_halt)(void);
|
||||
void (fastcall *halt)(void);
|
||||
void (fastcall *wbinvd)(void);
|
||||
|
||||
/* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
|
||||
u64 (fastcall *read_msr)(unsigned int msr, int *err);
|
||||
int (fastcall *write_msr)(unsigned int msr, u64 val);
|
||||
|
||||
u64 (fastcall *read_tsc)(void);
|
||||
u64 (fastcall *read_pmc)(void);
|
||||
|
||||
void (fastcall *load_tr_desc)(void);
|
||||
void (fastcall *load_gdt)(const struct Xgt_desc_struct *);
|
||||
void (fastcall *load_idt)(const struct Xgt_desc_struct *);
|
||||
void (fastcall *store_gdt)(struct Xgt_desc_struct *);
|
||||
void (fastcall *store_idt)(struct Xgt_desc_struct *);
|
||||
void (fastcall *set_ldt)(const void *desc, unsigned entries);
|
||||
unsigned long (fastcall *store_tr)(void);
|
||||
void (fastcall *load_tls)(struct thread_struct *t, unsigned int cpu);
|
||||
void (fastcall *write_ldt_entry)(void *dt, int entrynum,
|
||||
u32 low, u32 high);
|
||||
void (fastcall *write_gdt_entry)(void *dt, int entrynum,
|
||||
u32 low, u32 high);
|
||||
void (fastcall *write_idt_entry)(void *dt, int entrynum,
|
||||
u32 low, u32 high);
|
||||
void (fastcall *load_esp0)(struct tss_struct *tss,
|
||||
struct thread_struct *thread);
|
||||
|
||||
void (fastcall *set_iopl_mask)(unsigned mask);
|
||||
|
||||
void (fastcall *io_delay)(void);
|
||||
void (*const_udelay)(unsigned long loops);
|
||||
|
||||
/* These two are jmp to, not actually called. */
|
||||
void (fastcall *irq_enable_sysexit)(void);
|
||||
void (fastcall *iret)(void);
|
||||
};
|
||||
|
||||
extern struct paravirt_ops paravirt_ops;
|
||||
|
||||
#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
|
||||
|
||||
static inline void load_esp0(struct tss_struct *tss,
|
||||
struct thread_struct *thread)
|
||||
{
|
||||
paravirt_ops.load_esp0(tss, thread);
|
||||
}
|
||||
|
||||
#define ARCH_SETUP paravirt_ops.arch_setup();
|
||||
static inline unsigned long get_wallclock(void)
|
||||
{
|
||||
return paravirt_ops.get_wallclock();
|
||||
}
|
||||
|
||||
static inline int set_wallclock(unsigned long nowtime)
|
||||
{
|
||||
return paravirt_ops.set_wallclock(nowtime);
|
||||
}
|
||||
|
||||
static inline void do_time_init(void)
|
||||
{
|
||||
return paravirt_ops.time_init();
|
||||
}
|
||||
|
||||
/* The paravirtualized CPUID instruction. */
|
||||
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
|
||||
unsigned int *ecx, unsigned int *edx)
|
||||
{
|
||||
paravirt_ops.cpuid(eax, ebx, ecx, edx);
|
||||
}
|
||||
|
||||
/*
|
||||
* These special macros can be used to get or set a debugging register
|
||||
*/
|
||||
#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
|
||||
#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
|
||||
|
||||
#define clts() paravirt_ops.clts()
|
||||
|
||||
#define read_cr0() paravirt_ops.read_cr0()
|
||||
#define write_cr0(x) paravirt_ops.write_cr0(x)
|
||||
|
||||
#define read_cr2() paravirt_ops.read_cr2()
|
||||
#define write_cr2(x) paravirt_ops.write_cr2(x)
|
||||
|
||||
#define read_cr3() paravirt_ops.read_cr3()
|
||||
#define write_cr3(x) paravirt_ops.write_cr3(x)
|
||||
|
||||
#define read_cr4() paravirt_ops.read_cr4()
|
||||
#define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
|
||||
#define write_cr4(x) paravirt_ops.write_cr4(x)
|
||||
|
||||
static inline unsigned long __raw_local_save_flags(void)
|
||||
{
|
||||
return paravirt_ops.save_fl();
|
||||
}
|
||||
|
||||
static inline void raw_local_irq_restore(unsigned long flags)
|
||||
{
|
||||
return paravirt_ops.restore_fl(flags);
|
||||
}
|
||||
|
||||
static inline void raw_local_irq_disable(void)
|
||||
{
|
||||
paravirt_ops.irq_disable();
|
||||
}
|
||||
|
||||
static inline void raw_local_irq_enable(void)
|
||||
{
|
||||
paravirt_ops.irq_enable();
|
||||
}
|
||||
|
||||
static inline unsigned long __raw_local_irq_save(void)
|
||||
{
|
||||
unsigned long flags = paravirt_ops.save_fl();
|
||||
|
||||
paravirt_ops.irq_disable();
|
||||
|
||||
return flags;
|
||||
}
|
||||
|
||||
static inline void raw_safe_halt(void)
|
||||
{
|
||||
paravirt_ops.safe_halt();
|
||||
}
|
||||
|
||||
static inline void halt(void)
|
||||
{
|
||||
paravirt_ops.safe_halt();
|
||||
}
|
||||
#define wbinvd() paravirt_ops.wbinvd()
|
||||
|
||||
#define get_kernel_rpl() (paravirt_ops.kernel_rpl)
|
||||
|
||||
#define rdmsr(msr,val1,val2) do { \
|
||||
int _err; \
|
||||
u64 _l = paravirt_ops.read_msr(msr,&_err); \
|
||||
val1 = (u32)_l; \
|
||||
val2 = _l >> 32; \
|
||||
} while(0)
|
||||
|
||||
#define wrmsr(msr,val1,val2) do { \
|
||||
u64 _l = ((u64)(val2) << 32) | (val1); \
|
||||
paravirt_ops.write_msr((msr), _l); \
|
||||
} while(0)
|
||||
|
||||
#define rdmsrl(msr,val) do { \
|
||||
int _err; \
|
||||
val = paravirt_ops.read_msr((msr),&_err); \
|
||||
} while(0)
|
||||
|
||||
#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
|
||||
#define wrmsr_safe(msr,a,b) ({ \
|
||||
u64 _l = ((u64)(b) << 32) | (a); \
|
||||
paravirt_ops.write_msr((msr),_l); \
|
||||
})
|
||||
|
||||
/* rdmsr with exception handling */
|
||||
#define rdmsr_safe(msr,a,b) ({ \
|
||||
int _err; \
|
||||
u64 _l = paravirt_ops.read_msr(msr,&_err); \
|
||||
(*a) = (u32)_l; \
|
||||
(*b) = _l >> 32; \
|
||||
_err; })
|
||||
|
||||
#define rdtsc(low,high) do { \
|
||||
u64 _l = paravirt_ops.read_tsc(); \
|
||||
low = (u32)_l; \
|
||||
high = _l >> 32; \
|
||||
} while(0)
|
||||
|
||||
#define rdtscl(low) do { \
|
||||
u64 _l = paravirt_ops.read_tsc(); \
|
||||
low = (int)_l; \
|
||||
} while(0)
|
||||
|
||||
#define rdtscll(val) (val = paravirt_ops.read_tsc())
|
||||
|
||||
#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
|
||||
|
||||
#define rdpmc(counter,low,high) do { \
|
||||
u64 _l = paravirt_ops.read_pmc(); \
|
||||
low = (u32)_l; \
|
||||
high = _l >> 32; \
|
||||
} while(0)
|
||||
|
||||
#define load_TR_desc() (paravirt_ops.load_tr_desc())
|
||||
#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
|
||||
#define load_idt(dtr) (paravirt_ops.load_idt(dtr))
|
||||
#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
|
||||
#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
|
||||
#define store_idt(dtr) (paravirt_ops.store_idt(dtr))
|
||||
#define store_tr(tr) ((tr) = paravirt_ops.store_tr())
|
||||
#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
|
||||
#define write_ldt_entry(dt, entry, low, high) \
|
||||
(paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
|
||||
#define write_gdt_entry(dt, entry, low, high) \
|
||||
(paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
|
||||
#define write_idt_entry(dt, entry, low, high) \
|
||||
(paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
|
||||
#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
|
||||
|
||||
/* The paravirtualized I/O functions */
|
||||
static inline void slow_down_io(void) {
|
||||
paravirt_ops.io_delay();
|
||||
#ifdef REALLY_SLOW_IO
|
||||
paravirt_ops.io_delay();
|
||||
paravirt_ops.io_delay();
|
||||
paravirt_ops.io_delay();
|
||||
#endif
|
||||
}
|
||||
|
||||
#define CLI_STRING "pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_disable; popl %edx; popl %ecx; popl %eax"
|
||||
#define STI_STRING "pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_enable; popl %edx; popl %ecx; popl %eax"
|
||||
#else /* __ASSEMBLY__ */
|
||||
|
||||
#define INTERRUPT_RETURN jmp *%cs:paravirt_ops+PARAVIRT_iret
|
||||
#define DISABLE_INTERRUPTS pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_disable; popl %edx; popl %ecx; popl %eax
|
||||
#define ENABLE_INTERRUPTS pushl %eax; pushl %ecx; pushl %edx; call *%cs:paravirt_ops+PARAVIRT_irq_enable; popl %edx; popl %ecx; popl %eax
|
||||
#define ENABLE_INTERRUPTS_SYSEXIT jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit
|
||||
#define GET_CR0_INTO_EAX call *paravirt_ops+PARAVIRT_read_cr0
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
#endif /* __ASM_PARAVIRT_H */
|
||||
@ -144,7 +144,7 @@ static inline void detect_ht(struct cpuinfo_x86 *c) {}
|
||||
#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
|
||||
#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
|
||||
|
||||
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
|
||||
static inline fastcall void native_cpuid(unsigned int *eax, unsigned int *ebx,
|
||||
unsigned int *ecx, unsigned int *edx)
|
||||
{
|
||||
/* ecx is often an input as well as an output. */
|
||||
@ -491,6 +491,12 @@ struct thread_struct {
|
||||
.io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
#define paravirt_enabled() 0
|
||||
#define __cpuid native_cpuid
|
||||
|
||||
static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread)
|
||||
{
|
||||
tss->esp0 = thread->esp0;
|
||||
@ -524,10 +530,13 @@ static inline void load_esp0(struct tss_struct *tss, struct thread_struct *threa
|
||||
: /* no output */ \
|
||||
:"r" (value))
|
||||
|
||||
#define set_iopl_mask native_set_iopl_mask
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
|
||||
/*
|
||||
* Set IOPL bits in EFLAGS from given mask
|
||||
*/
|
||||
static inline void set_iopl_mask(unsigned mask)
|
||||
static fastcall inline void native_set_iopl_mask(unsigned mask)
|
||||
{
|
||||
unsigned int reg;
|
||||
__asm__ __volatile__ ("pushfl;"
|
||||
|
||||
@ -131,5 +131,7 @@
|
||||
#define SEGMENT_LDT 0x4
|
||||
#define SEGMENT_GDT 0x0
|
||||
|
||||
#ifndef CONFIG_PARAVIRT
|
||||
#define get_kernel_rpl() 0
|
||||
#endif
|
||||
#endif
|
||||
|
||||
@ -70,6 +70,7 @@ extern unsigned char boot_params[PARAM_SIZE];
|
||||
struct e820entry;
|
||||
|
||||
char * __init machine_specific_memory_setup(void);
|
||||
char *memory_setup(void);
|
||||
|
||||
int __init copy_e820_map(struct e820entry * biosmap, int nr_map);
|
||||
int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map);
|
||||
|
||||
@ -7,8 +7,12 @@
|
||||
#include <asm/processor.h>
|
||||
#include <linux/compiler.h>
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
#define CLI_STRING "cli"
|
||||
#define STI_STRING "sti"
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
|
||||
/*
|
||||
* Your basic SMP spinlocks, allowing only a single CPU anywhere
|
||||
|
||||
@ -23,12 +23,8 @@ arch_prepare_suspend(void)
|
||||
struct saved_context {
|
||||
u16 es, fs, gs, ss;
|
||||
unsigned long cr0, cr2, cr3, cr4;
|
||||
u16 gdt_pad;
|
||||
u16 gdt_limit;
|
||||
unsigned long gdt_base;
|
||||
u16 idt_pad;
|
||||
u16 idt_limit;
|
||||
unsigned long idt_base;
|
||||
struct Xgt_desc_struct gdt;
|
||||
struct Xgt_desc_struct idt;
|
||||
u16 ldt;
|
||||
u16 tss;
|
||||
unsigned long tr;
|
||||
|
||||
@ -88,6 +88,9 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t" \
|
||||
#define savesegment(seg, value) \
|
||||
asm volatile("mov %%" #seg ",%0":"=rm" (value))
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
#define read_cr0() ({ \
|
||||
unsigned int __dummy; \
|
||||
__asm__ __volatile__( \
|
||||
@ -139,17 +142,18 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t" \
|
||||
#define write_cr4(x) \
|
||||
__asm__ __volatile__("movl %0,%%cr4": :"r" (x))
|
||||
|
||||
/*
|
||||
* Clear and set 'TS' bit respectively
|
||||
*/
|
||||
#define wbinvd() \
|
||||
__asm__ __volatile__ ("wbinvd": : :"memory")
|
||||
|
||||
/* Clear the 'TS' bit */
|
||||
#define clts() __asm__ __volatile__ ("clts")
|
||||
#endif/* CONFIG_PARAVIRT */
|
||||
|
||||
/* Set the 'TS' bit */
|
||||
#define stts() write_cr0(8 | read_cr0())
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#define wbinvd() \
|
||||
__asm__ __volatile__ ("wbinvd": : :"memory")
|
||||
|
||||
static inline unsigned long get_limit(unsigned long segment)
|
||||
{
|
||||
unsigned long __limit;
|
||||
|
||||
41
include/asm-i386/time.h
Normal file
41
include/asm-i386/time.h
Normal file
@ -0,0 +1,41 @@
|
||||
#ifndef _ASMi386_TIME_H
|
||||
#define _ASMi386_TIME_H
|
||||
|
||||
#include <linux/efi.h>
|
||||
#include "mach_time.h"
|
||||
|
||||
static inline unsigned long native_get_wallclock(void)
|
||||
{
|
||||
unsigned long retval;
|
||||
|
||||
if (efi_enabled)
|
||||
retval = efi_get_time();
|
||||
else
|
||||
retval = mach_get_cmos_time();
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static inline int native_set_wallclock(unsigned long nowtime)
|
||||
{
|
||||
int retval;
|
||||
|
||||
if (efi_enabled)
|
||||
retval = efi_set_rtc_mmss(nowtime);
|
||||
else
|
||||
retval = mach_set_rtc_mmss(nowtime);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else /* !CONFIG_PARAVIRT */
|
||||
|
||||
#define get_wallclock() native_get_wallclock()
|
||||
#define set_wallclock(x) native_set_wallclock(x)
|
||||
#define do_time_init() time_init_hook()
|
||||
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user