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x86: Reformat and cleanup CR4 constants
[jailhouse.git] / hypervisor / arch / x86 / include / asm / processor.h
1 /*
2  * Jailhouse, a Linux-based partitioning hypervisor
3  *
4  * Copyright (c) Siemens AG, 2013
5  * Copyright (c) Valentine Sinitsyn, 2014
6  *
7  * Authors:
8  *  Jan Kiszka <jan.kiszka@siemens.com>
9  *  Valentine Sinitsyn <valentine.sinitsyn@gmail.com>
10  *
11  * This work is licensed under the terms of the GNU GPL, version 2.  See
12  * the COPYING file in the top-level directory.
13  */
14
15 #ifndef _JAILHOUSE_ASM_PROCESSOR_H
16 #define _JAILHOUSE_ASM_PROCESSOR_H
17
18 #include <jailhouse/types.h>
19
20 #define X86_FEATURE_VMX                                 (1 << 5)
21 #define X86_FEATURE_GBPAGES                             (1 << 26)
22 #define X86_FEATURE_RDTSCP                              (1 << 27)
23
24 #define X86_FEATURE_SVM                                 (1 << 2)
25 #define X86_FEATURE_NP                                  (1 << 0)
26 #define X86_FEATURE_FLUSH_BY_ASID                       (1 << 6)
27 #define X86_FEATURE_DECODE_ASSISTS                      (1 << 7)
28 #define X86_FEATURE_AVIC                                (1 << 13)
29
30 #define X86_RFLAGS_VM                                   (1 << 17)
31
32 #define X86_CR0_PE                                      (1UL << 0)
33 #define X86_CR0_MP                                      (1UL << 1)
34 #define X86_CR0_TS                                      (1UL << 3)
35 #define X86_CR0_ET                                      (1UL << 4)
36 #define X86_CR0_NE                                      (1UL << 5)
37 #define X86_CR0_WP                                      (1UL << 16)
38 #define X86_CR0_NW                                      (1UL << 29)
39 #define X86_CR0_CD                                      (1UL << 30)
40 #define X86_CR0_PG                                      (1UL << 31)
41 #define X86_CR0_RESERVED                                \
42         (BIT_MASK(28, 19) |  (1UL << 17) | BIT_MASK(15, 6))
43
44 #define X86_CR4_PAE                                     (1UL << 5)
45 #define X86_CR4_VMXE                                    (1UL << 13)
46 #define X86_CR4_OSXSAVE                                 (1UL << 18)
47 #define X86_CR4_RESERVED                                \
48         (BIT_MASK(31, 22) | (1UL << 19) | (1UL << 15) | BIT_MASK(12, 11))
49
50 #define X86_XCR0_FP                                     0x00000001
51
52 #define MSR_IA32_APICBASE                               0x0000001b
53 #define MSR_IA32_FEATURE_CONTROL                        0x0000003a
54 #define MSR_IA32_PAT                                    0x00000277
55 #define MSR_IA32_SYSENTER_CS                            0x00000174
56 #define MSR_IA32_SYSENTER_ESP                           0x00000175
57 #define MSR_IA32_SYSENTER_EIP                           0x00000176
58 #define MSR_IA32_VMX_BASIC                              0x00000480
59 #define MSR_IA32_VMX_PINBASED_CTLS                      0x00000481
60 #define MSR_IA32_VMX_PROCBASED_CTLS                     0x00000482
61 #define MSR_IA32_VMX_EXIT_CTLS                          0x00000483
62 #define MSR_IA32_VMX_ENTRY_CTLS                         0x00000484
63 #define MSR_IA32_VMX_MISC                               0x00000485
64 #define MSR_IA32_VMX_CR0_FIXED0                         0x00000486
65 #define MSR_IA32_VMX_CR0_FIXED1                         0x00000487
66 #define MSR_IA32_VMX_CR4_FIXED0                         0x00000488
67 #define MSR_IA32_VMX_CR4_FIXED1                         0x00000489
68 #define MSR_IA32_VMX_PROCBASED_CTLS2                    0x0000048b
69 #define MSR_IA32_VMX_EPT_VPID_CAP                       0x0000048c
70 #define MSR_IA32_VMX_TRUE_PROCBASED_CTLS                0x0000048e
71 #define MSR_X2APIC_BASE                                 0x00000800
72 #define MSR_X2APIC_ICR                                  0x00000830
73 #define MSR_X2APIC_END                                  0x0000083f
74 #define MSR_EFER                                        0xc0000080
75 #define MSR_STAR                                        0xc0000081
76 #define MSR_LSTAR                                       0xc0000082
77 #define MSR_CSTAR                                       0xc0000083
78 #define MSR_SFMASK                                      0xc0000084
79 #define MSR_FS_BASE                                     0xc0000100
80 #define MSR_GS_BASE                                     0xc0000101
81 #define MSR_KERNGS_BASE                                 0xc0000102
82
83 #define FEATURE_CONTROL_LOCKED                          (1 << 0)
84 #define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX       (1 << 2)
85
86 #define EFER_LME                                        0x00000100
87 #define EFER_LMA                                        0x00000400
88 #define EFER_NXE                                        0x00000800
89
90 #define GDT_DESC_NULL                                   0
91 #define GDT_DESC_CODE                                   1
92 #define GDT_DESC_TSS                                    2
93 #define GDT_DESC_TSS_HI                                 3
94 #define NUM_GDT_DESC                                    4
95
96 #define X86_INST_LEN_CPUID                              2
97 #define X86_INST_LEN_RDMSR                              2
98 #define X86_INST_LEN_WRMSR                              2
99 /* This covers both VMCALL and VMMCALL */
100 #define X86_INST_LEN_HYPERCALL                          3
101 #define X86_INST_LEN_MOV_TO_CR                          3
102 #define X86_INST_LEN_XSETBV                             3
103
104 #define X86_REX_CODE                                    4
105
106 #define X86_OP_MOV_TO_MEM                               0x89
107 #define X86_OP_MOV_FROM_MEM                             0x8b
108
109 #define NMI_VECTOR                                      2
110 #define PF_VECTOR                                       14
111
112 #define DESC_TSS_BUSY                                   (1UL << (9 + 32))
113 #define DESC_PRESENT                                    (1UL << (15 + 32))
114 #define DESC_CODE_DATA                                  (1UL << (12 + 32))
115 #define DESC_PAGE_GRAN                                  (1UL << (23 + 32))
116
117 #ifndef __ASSEMBLY__
118
119 /**
120  * @ingroup X86
121  * @defgroup Processor Processor
122  *
123  * Low-level support for x86 processor configuration and status retrieval.
124  *
125  * @{
126  */
127
128 struct registers {
129         unsigned long r15;
130         unsigned long r14;
131         unsigned long r13;
132         unsigned long r12;
133         unsigned long r11;
134         unsigned long r10;
135         unsigned long r9;
136         unsigned long r8;
137         unsigned long rdi;
138         unsigned long rsi;
139         unsigned long rbp;
140         unsigned long unused;
141         unsigned long rbx;
142         unsigned long rdx;
143         unsigned long rcx;
144         unsigned long rax;
145 };
146
147 struct desc_table_reg {
148         u16 limit;
149         u64 base;
150 } __attribute__((packed));
151
152 struct segment {
153         u64 base;
154         u32 limit;
155         u32 access_rights;
156         u16 selector;
157 };
158
159 static unsigned long __force_order;
160
161 static inline void cpu_relax(void)
162 {
163         asm volatile("rep; nop" : : : "memory");
164 }
165
166 static inline void memory_barrier(void)
167 {
168         asm volatile("mfence" : : : "memory");
169 }
170
171 static inline void memory_load_barrier(void)
172 {
173         asm volatile("lfence" : : : "memory");
174 }
175
176 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
177                            unsigned int *ecx, unsigned int *edx)
178 {
179         /* ecx is often an input as well as an output. */
180         asm volatile("cpuid"
181             : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
182             : "0" (*eax), "2" (*ecx)
183             : "memory");
184 }
185
186 static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx,
187                          unsigned int *ecx, unsigned int *edx)
188 {
189         *eax = op;
190         *ecx = 0;
191         __cpuid(eax, ebx, ecx, edx);
192 }
193
194 #define CPUID_REG(reg)                                          \
195 static inline unsigned int cpuid_##reg(unsigned int op)         \
196 {                                                               \
197         unsigned int eax, ebx, ecx, edx;                        \
198                                                                 \
199         cpuid(op, &eax, &ebx, &ecx, &edx);                      \
200         return reg;                                             \
201 }
202
203 CPUID_REG(eax)
204 CPUID_REG(ebx)
205 CPUID_REG(ecx)
206 CPUID_REG(edx)
207
208 static inline unsigned long read_cr0(void)
209 {
210         unsigned long cr0;
211
212         asm volatile("mov %%cr0,%0" : "=r" (cr0), "=m" (__force_order));
213         return cr0;
214 }
215
216 static inline void write_cr0(unsigned long val)
217 {
218         asm volatile("mov %0,%%cr0" : : "r" (val), "m" (__force_order));
219 }
220
221 static inline unsigned long read_cr2(void)
222 {
223         unsigned long cr2;
224
225         asm volatile("mov %%cr2,%0" : "=r" (cr2), "=m" (__force_order));
226         return cr2;
227 }
228
229 static inline unsigned long read_cr3(void)
230 {
231         unsigned long cr3;
232
233         asm volatile("mov %%cr3,%0" : "=r" (cr3), "=m" (__force_order));
234         return cr3;
235 }
236
237 static inline void write_cr3(unsigned long val)
238 {
239         asm volatile("mov %0,%%cr3" : : "r" (val), "m" (__force_order));
240 }
241
242 static inline unsigned long read_cr4(void)
243 {
244         unsigned long cr4;
245
246         asm volatile("mov %%cr4,%0" : "=r" (cr4), "=m" (__force_order));
247         return cr4;
248 }
249
250 static inline void write_cr4(unsigned long val)
251 {
252         asm volatile("mov %0,%%cr4" : : "r" (val), "m" (__force_order));
253 }
254
255 static inline unsigned long read_msr(unsigned int msr)
256 {
257         u32 low, high;
258
259         asm volatile("rdmsr" : "=a" (low), "=d" (high) : "c" (msr));
260         return low | ((unsigned long)high << 32);
261 }
262
263 static inline void write_msr(unsigned int msr, unsigned long val)
264 {
265         asm volatile("wrmsr"
266                 : /* no output */
267                 : "c" (msr), "a" (val), "d" (val >> 32)
268                 : "memory");
269 }
270
271 static inline void read_gdtr(struct desc_table_reg *val)
272 {
273         asm volatile("sgdtq %0" : "=m" (*val));
274 }
275
276 static inline void write_gdtr(struct desc_table_reg *val)
277 {
278         asm volatile("lgdtq %0" : : "m" (*val));
279 }
280
281 static inline void read_idtr(struct desc_table_reg *val)
282 {
283         asm volatile("sidtq %0" : "=m" (*val));
284 }
285
286 static inline void write_idtr(struct desc_table_reg *val)
287 {
288         asm volatile("lidtq %0" : : "m" (*val));
289 }
290
291 /**
292  * Enable or disable interrupts delivery to the local CPU when in host mode.
293  *
294  * In some cases (AMD) changing IF isn't enough, so these are implemented on
295  * per-vendor basis.
296  * @{
297  */
298 void enable_irq(void);
299
300 void disable_irq(void);
301 /** @} */
302
303 /** @} */
304 #endif /* !__ASSEMBLY__ */
305
306 #endif /* !_JAILHOUSE_ASM_PROCESSOR_H */