forked from Minki/linux
d3561b7fa0
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>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* Copyright 2001-2002 Pavel Machek <pavel@suse.cz>
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* Based on code
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* Copyright 2001 Patrick Mochel <mochel@osdl.org>
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*/
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#include <asm/desc.h>
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#include <asm/i387.h>
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static inline int
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arch_prepare_suspend(void)
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{
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/* If you want to make non-PSE machine work, turn off paging
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in swsusp_arch_suspend. swsusp_pg_dir should have identity mapping, so
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it could work... */
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if (!cpu_has_pse) {
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printk(KERN_ERR "PSE is required for swsusp.\n");
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return -EPERM;
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}
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return 0;
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}
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/* image of the saved processor state */
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struct saved_context {
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u16 es, fs, gs, ss;
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unsigned long cr0, cr2, cr3, cr4;
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struct Xgt_desc_struct gdt;
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struct Xgt_desc_struct idt;
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u16 ldt;
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u16 tss;
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unsigned long tr;
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unsigned long safety;
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unsigned long return_address;
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} __attribute__((packed));
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#ifdef CONFIG_ACPI_SLEEP
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extern unsigned long saved_eip;
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extern unsigned long saved_esp;
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extern unsigned long saved_ebp;
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extern unsigned long saved_ebx;
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extern unsigned long saved_esi;
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extern unsigned long saved_edi;
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static inline void acpi_save_register_state(unsigned long return_point)
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{
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saved_eip = return_point;
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asm volatile ("movl %%esp,%0" : "=m" (saved_esp));
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asm volatile ("movl %%ebp,%0" : "=m" (saved_ebp));
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asm volatile ("movl %%ebx,%0" : "=m" (saved_ebx));
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asm volatile ("movl %%edi,%0" : "=m" (saved_edi));
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asm volatile ("movl %%esi,%0" : "=m" (saved_esi));
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}
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#define acpi_restore_register_state() do {} while (0)
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/* routines for saving/restoring kernel state */
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extern int acpi_save_state_mem(void);
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#endif
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