2 * Jailhouse, a Linux-based partitioning hypervisor
4 * Copyright (c) Siemens AG, 2013
5 * Copyright (c) Valentine Sinitsyn, 2014
8 * Jan Kiszka <jan.kiszka@siemens.com>
9 * Valentine Sinitsyn <valentine.sinitsyn@gmail.com>
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
15 #ifndef _JAILHOUSE_ASM_PROCESSOR_H
16 #define _JAILHOUSE_ASM_PROCESSOR_H
18 #include <jailhouse/types.h>
21 #define X86_FEATURE_VMX (1 << 5)
23 /* leaf 0x80000001, ECX */
24 #define X86_FEATURE_SVM (1 << 2)
26 /* leaf 0x80000001, EDX */
27 #define X86_FEATURE_GBPAGES (1 << 26)
28 #define X86_FEATURE_RDTSCP (1 << 27)
30 /* leaf 0x8000000a, EDX */
31 #define X86_FEATURE_NP (1 << 0)
32 #define X86_FEATURE_FLUSH_BY_ASID (1 << 6)
33 #define X86_FEATURE_DECODE_ASSISTS (1 << 7)
34 #define X86_FEATURE_AVIC (1 << 13)
36 #define X86_RFLAGS_VM (1 << 17)
38 #define X86_CR0_PE (1UL << 0)
39 #define X86_CR0_MP (1UL << 1)
40 #define X86_CR0_TS (1UL << 3)
41 #define X86_CR0_ET (1UL << 4)
42 #define X86_CR0_NE (1UL << 5)
43 #define X86_CR0_WP (1UL << 16)
44 #define X86_CR0_NW (1UL << 29)
45 #define X86_CR0_CD (1UL << 30)
46 #define X86_CR0_PG (1UL << 31)
47 #define X86_CR0_RESERVED \
48 (BIT_MASK(28, 19) | (1UL << 17) | BIT_MASK(15, 6))
50 #define X86_CR4_PAE (1UL << 5)
51 #define X86_CR4_VMXE (1UL << 13)
52 #define X86_CR4_OSXSAVE (1UL << 18)
53 #define X86_CR4_RESERVED \
54 (BIT_MASK(31, 22) | (1UL << 19) | (1UL << 15) | BIT_MASK(12, 11))
56 #define X86_XCR0_FP 0x00000001
58 #define MSR_IA32_APICBASE 0x0000001b
59 #define MSR_IA32_FEATURE_CONTROL 0x0000003a
60 #define MSR_IA32_PAT 0x00000277
61 #define MSR_IA32_SYSENTER_CS 0x00000174
62 #define MSR_IA32_SYSENTER_ESP 0x00000175
63 #define MSR_IA32_SYSENTER_EIP 0x00000176
64 #define MSR_IA32_VMX_BASIC 0x00000480
65 #define MSR_IA32_VMX_PINBASED_CTLS 0x00000481
66 #define MSR_IA32_VMX_PROCBASED_CTLS 0x00000482
67 #define MSR_IA32_VMX_EXIT_CTLS 0x00000483
68 #define MSR_IA32_VMX_ENTRY_CTLS 0x00000484
69 #define MSR_IA32_VMX_MISC 0x00000485
70 #define MSR_IA32_VMX_CR0_FIXED0 0x00000486
71 #define MSR_IA32_VMX_CR0_FIXED1 0x00000487
72 #define MSR_IA32_VMX_CR4_FIXED0 0x00000488
73 #define MSR_IA32_VMX_CR4_FIXED1 0x00000489
74 #define MSR_IA32_VMX_PROCBASED_CTLS2 0x0000048b
75 #define MSR_IA32_VMX_EPT_VPID_CAP 0x0000048c
76 #define MSR_IA32_VMX_TRUE_PROCBASED_CTLS 0x0000048e
77 #define MSR_X2APIC_BASE 0x00000800
78 #define MSR_X2APIC_ICR 0x00000830
79 #define MSR_X2APIC_END 0x0000083f
80 #define MSR_EFER 0xc0000080
81 #define MSR_STAR 0xc0000081
82 #define MSR_LSTAR 0xc0000082
83 #define MSR_CSTAR 0xc0000083
84 #define MSR_SFMASK 0xc0000084
85 #define MSR_FS_BASE 0xc0000100
86 #define MSR_GS_BASE 0xc0000101
87 #define MSR_KERNGS_BASE 0xc0000102
89 #define FEATURE_CONTROL_LOCKED (1 << 0)
90 #define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX (1 << 2)
92 #define EFER_LME 0x00000100
93 #define EFER_LMA 0x00000400
94 #define EFER_NXE 0x00000800
96 #define GDT_DESC_NULL 0
97 #define GDT_DESC_CODE 1
98 #define GDT_DESC_TSS 2
99 #define GDT_DESC_TSS_HI 3
100 #define NUM_GDT_DESC 4
102 #define X86_INST_LEN_CPUID 2
103 #define X86_INST_LEN_RDMSR 2
104 #define X86_INST_LEN_WRMSR 2
105 /* This covers both VMCALL and VMMCALL */
106 #define X86_INST_LEN_HYPERCALL 3
107 #define X86_INST_LEN_MOV_TO_CR 3
108 #define X86_INST_LEN_XSETBV 3
110 #define X86_REX_CODE 4
112 #define X86_OP_MOV_TO_MEM 0x89
113 #define X86_OP_MOV_FROM_MEM 0x8b
118 #define DESC_TSS_BUSY (1UL << (9 + 32))
119 #define DESC_PRESENT (1UL << (15 + 32))
120 #define DESC_CODE_DATA (1UL << (12 + 32))
121 #define DESC_PAGE_GRAN (1UL << (23 + 32))
127 * @defgroup Processor Processor
129 * Low-level support for x86 processor configuration and status retrieval.
146 unsigned long unused;
153 struct desc_table_reg {
156 } __attribute__((packed));
165 static unsigned long __force_order;
167 static inline void cpu_relax(void)
169 asm volatile("rep; nop" : : : "memory");
172 static inline void memory_barrier(void)
174 asm volatile("mfence" : : : "memory");
177 static inline void memory_load_barrier(void)
179 asm volatile("lfence" : : : "memory");
182 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
183 unsigned int *ecx, unsigned int *edx)
185 /* ecx is often an input as well as an output. */
187 : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
188 : "0" (*eax), "2" (*ecx)
192 static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx,
193 unsigned int *ecx, unsigned int *edx)
197 __cpuid(eax, ebx, ecx, edx);
200 #define CPUID_REG(reg) \
201 static inline unsigned int cpuid_##reg(unsigned int op) \
203 unsigned int eax, ebx, ecx, edx; \
205 cpuid(op, &eax, &ebx, &ecx, &edx); \
214 static inline unsigned long read_cr0(void)
218 asm volatile("mov %%cr0,%0" : "=r" (cr0), "=m" (__force_order));
222 static inline void write_cr0(unsigned long val)
224 asm volatile("mov %0,%%cr0" : : "r" (val), "m" (__force_order));
227 static inline unsigned long read_cr2(void)
231 asm volatile("mov %%cr2,%0" : "=r" (cr2), "=m" (__force_order));
235 static inline unsigned long read_cr3(void)
239 asm volatile("mov %%cr3,%0" : "=r" (cr3), "=m" (__force_order));
243 static inline void write_cr3(unsigned long val)
245 asm volatile("mov %0,%%cr3" : : "r" (val), "m" (__force_order));
248 static inline unsigned long read_cr4(void)
252 asm volatile("mov %%cr4,%0" : "=r" (cr4), "=m" (__force_order));
256 static inline void write_cr4(unsigned long val)
258 asm volatile("mov %0,%%cr4" : : "r" (val), "m" (__force_order));
261 static inline unsigned long read_msr(unsigned int msr)
265 asm volatile("rdmsr" : "=a" (low), "=d" (high) : "c" (msr));
266 return low | ((unsigned long)high << 32);
269 static inline void write_msr(unsigned int msr, unsigned long val)
273 : "c" (msr), "a" (val), "d" (val >> 32)
277 static inline void read_gdtr(struct desc_table_reg *val)
279 asm volatile("sgdtq %0" : "=m" (*val));
282 static inline void write_gdtr(struct desc_table_reg *val)
284 asm volatile("lgdtq %0" : : "m" (*val));
287 static inline void read_idtr(struct desc_table_reg *val)
289 asm volatile("sidtq %0" : "=m" (*val));
292 static inline void write_idtr(struct desc_table_reg *val)
294 asm volatile("lidtq %0" : : "m" (*val));
298 * Enable or disable interrupts delivery to the local CPU when in host mode.
300 * In some cases (AMD) changing IF isn't enough, so these are implemented on
304 void enable_irq(void);
306 void disable_irq(void);
310 #endif /* !__ASSEMBLY__ */
312 #endif /* !_JAILHOUSE_ASM_PROCESSOR_H */