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author | Rusty Russell <rusty@rustcorp.com.au> | 2006-12-07 02:14:07 +0100 |
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committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:07 +0100 |
commit | d3561b7fa0fb0fc583bab0eeda32bec9e4c4056d (patch) | |
tree | 39d835965878622d052ef3b3c7b759d83b6bc327 /include/asm-i386/processor.h | |
parent | db91b882aabd0b3b55a87cbfb344f2798bb740b4 (diff) | |
download | linux-3.10-d3561b7fa0fb0fc583bab0eeda32bec9e4c4056d.tar.gz linux-3.10-d3561b7fa0fb0fc583bab0eeda32bec9e4c4056d.tar.bz2 linux-3.10-d3561b7fa0fb0fc583bab0eeda32bec9e4c4056d.zip |
[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>
Diffstat (limited to 'include/asm-i386/processor.h')
-rw-r--r-- | include/asm-i386/processor.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h index 98fa73b7176..6c2c4457be0 100644 --- a/include/asm-i386/processor.h +++ b/include/asm-i386/processor.h @@ -144,8 +144,8 @@ 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, - unsigned int *ecx, unsigned int *edx) +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. */ __asm__("cpuid" @@ -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;" |