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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-02-11 14:52:22 -0500
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-02-11 14:52:22 -0500
commit9049a11de73d3ecc623f1903100d099f82ede56c (patch)
treec03d130d58168e337a66fe999682452b7a02b42b /arch/x86/include/asm/pda.h
parentc47c1b1f3a9d6973108020df1dcab7604f7774dd (diff)
parente4d0407185cdbdcfd99fc23bde2e5454bbc46329 (diff)
Merge commit 'remotes/tip/x86/paravirt' into x86/untangle2
* commit 'remotes/tip/x86/paravirt': (175 commits) xen: use direct ops on 64-bit xen: make direct versions of irq_enable/disable/save/restore to common code xen: setup percpu data pointers xen: fix 32-bit build resulting from mmu move x86/paravirt: return full 64-bit result x86, percpu: fix kexec with vmlinux x86/vmi: fix interrupt enable/disable/save/restore calling convention. x86/paravirt: don't restore second return reg xen: setup percpu data pointers x86: split loading percpu segments from loading gdt x86: pass in cpu number to switch_to_new_gdt() x86: UV fix uv_flush_send_and_wait() x86/paravirt: fix missing callee-save call on pud_val x86/paravirt: use callee-saved convention for pte_val/make_pte/etc x86/paravirt: implement PVOP_CALL macros for callee-save functions x86/paravirt: add register-saving thunks to reduce caller register pressure x86/paravirt: selectively save/restore regs around pvops calls x86: fix paravirt clobber in entry_64.S x86/pvops: add a paravirt_ident functions to allow special patching xen: move remaining mmu-related stuff into mmu.c ... Conflicts: arch/x86/mach-voyager/voyager_smp.c arch/x86/mm/fault.c
Diffstat (limited to 'arch/x86/include/asm/pda.h')
-rw-r--r--arch/x86/include/asm/pda.h137
1 files changed, 0 insertions, 137 deletions
diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h
deleted file mode 100644
index 2fbfff88df37..000000000000
--- a/arch/x86/include/asm/pda.h
+++ /dev/null
@@ -1,137 +0,0 @@
1#ifndef _ASM_X86_PDA_H
2#define _ASM_X86_PDA_H
3
4#ifndef __ASSEMBLY__
5#include <linux/stddef.h>
6#include <linux/types.h>
7#include <linux/cache.h>
8#include <asm/page.h>
9
10/* Per processor datastructure. %gs points to it while the kernel runs */
11struct x8664_pda {
12 struct task_struct *pcurrent; /* 0 Current process */
13 unsigned long data_offset; /* 8 Per cpu data offset from linker
14 address */
15 unsigned long kernelstack; /* 16 top of kernel stack for current */
16 unsigned long oldrsp; /* 24 user rsp for system call */
17 int irqcount; /* 32 Irq nesting counter. Starts -1 */
18 unsigned int cpunumber; /* 36 Logical CPU number */
19#ifdef CONFIG_CC_STACKPROTECTOR
20 unsigned long stack_canary; /* 40 stack canary value */
21 /* gcc-ABI: this canary MUST be at
22 offset 40!!! */
23#endif
24 char *irqstackptr;
25 short nodenumber; /* number of current node (32k max) */
26 short in_bootmem; /* pda lives in bootmem */
27 unsigned int __softirq_pending;
28 unsigned int __nmi_count; /* number of NMI on this CPUs */
29 short mmu_state;
30 short isidle;
31 struct mm_struct *active_mm;
32 unsigned apic_timer_irqs;
33 unsigned irq0_irqs;
34 unsigned irq_resched_count;
35 unsigned irq_call_count;
36 unsigned irq_tlb_count;
37 unsigned irq_thermal_count;
38 unsigned irq_threshold_count;
39 unsigned irq_spurious_count;
40} ____cacheline_aligned_in_smp;
41
42extern struct x8664_pda **_cpu_pda;
43extern void pda_init(int);
44
45#define cpu_pda(i) (_cpu_pda[i])
46
47/*
48 * There is no fast way to get the base address of the PDA, all the accesses
49 * have to mention %fs/%gs. So it needs to be done this Torvaldian way.
50 */
51extern void __bad_pda_field(void) __attribute__((noreturn));
52
53/*
54 * proxy_pda doesn't actually exist, but tell gcc it is accessed for
55 * all PDA accesses so it gets read/write dependencies right.
56 */
57extern struct x8664_pda _proxy_pda;
58
59#define pda_offset(field) offsetof(struct x8664_pda, field)
60
61#define pda_to_op(op, field, val) \
62do { \
63 typedef typeof(_proxy_pda.field) T__; \
64 if (0) { T__ tmp__; tmp__ = (val); } /* type checking */ \
65 switch (sizeof(_proxy_pda.field)) { \
66 case 2: \
67 asm(op "w %1,%%gs:%c2" : \
68 "+m" (_proxy_pda.field) : \
69 "ri" ((T__)val), \
70 "i"(pda_offset(field))); \
71 break; \
72 case 4: \
73 asm(op "l %1,%%gs:%c2" : \
74 "+m" (_proxy_pda.field) : \
75 "ri" ((T__)val), \
76 "i" (pda_offset(field))); \
77 break; \
78 case 8: \
79 asm(op "q %1,%%gs:%c2": \
80 "+m" (_proxy_pda.field) : \
81 "ri" ((T__)val), \
82 "i"(pda_offset(field))); \
83 break; \
84 default: \
85 __bad_pda_field(); \
86 } \
87} while (0)
88
89#define pda_from_op(op, field) \
90({ \
91 typeof(_proxy_pda.field) ret__; \
92 switch (sizeof(_proxy_pda.field)) { \
93 case 2: \
94 asm(op "w %%gs:%c1,%0" : \
95 "=r" (ret__) : \
96 "i" (pda_offset(field)), \
97 "m" (_proxy_pda.field)); \
98 break; \
99 case 4: \
100 asm(op "l %%gs:%c1,%0": \
101 "=r" (ret__): \
102 "i" (pda_offset(field)), \
103 "m" (_proxy_pda.field)); \
104 break; \
105 case 8: \
106 asm(op "q %%gs:%c1,%0": \
107 "=r" (ret__) : \
108 "i" (pda_offset(field)), \
109 "m" (_proxy_pda.field)); \
110 break; \
111 default: \
112 __bad_pda_field(); \
113 } \
114 ret__; \
115})
116
117#define read_pda(field) pda_from_op("mov", field)
118#define write_pda(field, val) pda_to_op("mov", field, val)
119#define add_pda(field, val) pda_to_op("add", field, val)
120#define sub_pda(field, val) pda_to_op("sub", field, val)
121#define or_pda(field, val) pda_to_op("or", field, val)
122
123/* This is not atomic against other CPUs -- CPU preemption needs to be off */
124#define test_and_clear_bit_pda(bit, field) \
125({ \
126 int old__; \
127 asm volatile("btr %2,%%gs:%c3\n\tsbbl %0,%0" \
128 : "=r" (old__), "+m" (_proxy_pda.field) \
129 : "dIr" (bit), "i" (pda_offset(field)) : "memory");\
130 old__; \
131})
132
133#endif
134
135#define PDA_STACKOFFSET (5*8)
136
137#endif /* _ASM_X86_PDA_H */
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