1 /*
2 * vcpu.h: HVM per vcpu definitions
3 *
4 * Copyright (c) 2005, International Business Machines Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #ifndef __ASM_X86_HVM_VCPU_H__
20 #define __ASM_X86_HVM_VCPU_H__
21
22 #include <xen/tasklet.h>
23 #include <asm/hvm/io.h>
24 #include <asm/hvm/vlapic.h>
25 #include <asm/hvm/viridian.h>
26 #include <asm/hvm/vmx/vmcs.h>
27 #include <asm/hvm/vmx/vvmx.h>
28 #include <asm/hvm/svm/vmcb.h>
29 #include <asm/hvm/svm/nestedsvm.h>
30 #include <asm/mtrr.h>
31
32 enum hvm_io_completion {
33 HVMIO_no_completion,
34 HVMIO_mmio_completion,
35 HVMIO_pio_completion,
36 HVMIO_realmode_completion
37 };
38
39 struct hvm_vcpu_asid {
40 uint64_t generation;
41 uint32_t asid;
42 };
43
44 /*
45 * We may read or write up to m256 as a number of device-model
46 * transactions.
47 */
48 struct hvm_mmio_cache {
49 unsigned long gla;
50 unsigned int size;
51 uint8_t dir;
52 uint8_t pad[3]; /* make buffer[] long-aligned */
53 uint8_t buffer[32];
54 };
55
56 struct hvm_vcpu_io {
57 /* I/O request in flight to device model. */
58 enum hvm_io_completion io_completion;
59 ioreq_t io_req;
60
61 /*
62 * HVM emulation:
63 * Linear address @mmio_gla maps to MMIO physical frame @mmio_gpfn.
64 * The latter is known to be an MMIO frame (not RAM).
65 * This translation is only valid for accesses as per @mmio_access.
66 */
67 struct npfec mmio_access;
68 unsigned long mmio_gla;
69 unsigned long mmio_gpfn;
70
71 /*
72 * We may need to handle up to 3 distinct memory accesses per
73 * instruction.
74 */
75 struct hvm_mmio_cache mmio_cache[3];
76 unsigned int mmio_cache_count;
77
78 /* For retries we shouldn't re-fetch the instruction. */
79 unsigned int mmio_insn_bytes;
80 unsigned char mmio_insn[16];
81 /*
82 * For string instruction emulation we need to be able to signal a
83 * necessary retry through other than function return codes.
84 */
85 bool_t mmio_retry;
86
87 unsigned long msix_unmask_address;
88 unsigned long msix_snoop_address;
89 unsigned long msix_snoop_gpa;
90
91 const struct g2m_ioport *g2m_ioport;
92 };
93
hvm_vcpu_io_need_completion(const struct hvm_vcpu_io * vio)94 static inline bool_t hvm_vcpu_io_need_completion(const struct hvm_vcpu_io *vio)
95 {
96 return (vio->io_req.state == STATE_IOREQ_READY) &&
97 !vio->io_req.data_is_ptr;
98 }
99
100 struct nestedvcpu {
101 bool_t nv_guestmode; /* vcpu in guestmode? */
102 void *nv_vvmcx; /* l1 guest virtual VMCB/VMCS */
103 void *nv_n1vmcx; /* VMCB/VMCS used to run l1 guest */
104 void *nv_n2vmcx; /* shadow VMCB/VMCS used to run l2 guest */
105
106 uint64_t nv_vvmcxaddr; /* l1 guest physical address of nv_vvmcx */
107 paddr_t nv_n1vmcx_pa; /* host physical address of nv_n1vmcx */
108 paddr_t nv_n2vmcx_pa; /* host physical address of nv_n2vmcx */
109
110 /* SVM/VMX arch specific */
111 union {
112 struct nestedsvm nsvm;
113 struct nestedvmx nvmx;
114 } u;
115
116 bool_t nv_flushp2m; /* True, when p2m table must be flushed */
117 struct p2m_domain *nv_p2m; /* used p2m table for this vcpu */
118 bool stale_np2m; /* True when p2m_base in VMCx02 is no longer valid */
119 uint64_t np2m_generation;
120
121 struct hvm_vcpu_asid nv_n2asid;
122
123 bool_t nv_vmentry_pending;
124 bool_t nv_vmexit_pending;
125 bool_t nv_vmswitch_in_progress; /* true during vmentry/vmexit emulation */
126
127 /* Does l1 guest intercept io ports 0x80 and/or 0xED ?
128 * Useful to optimize io permission handling.
129 */
130 bool_t nv_ioport80;
131 bool_t nv_ioportED;
132
133 /* L2's control-resgister, just as the L2 sees them. */
134 unsigned long guest_cr[5];
135 };
136
137 #define vcpu_nestedhvm(v) ((v)->arch.hvm_vcpu.nvcpu)
138
139 struct altp2mvcpu {
140 uint16_t p2midx; /* alternate p2m index */
141 gfn_t veinfo_gfn; /* #VE information page gfn */
142 };
143
144 #define vcpu_altp2m(v) ((v)->arch.hvm_vcpu.avcpu)
145
146 struct hvm_vcpu {
147 /* Guest control-register and EFER values, just as the guest sees them. */
148 unsigned long guest_cr[5];
149 unsigned long guest_efer;
150
151 /*
152 * Processor-visible control-register values, while guest executes.
153 * CR0, CR4: Used as a cache of VMCS contents by VMX only.
154 * CR1, CR2: Never used (guest_cr[2] is always processor-visible CR2).
155 * CR3: Always used and kept up to date by paging subsystem.
156 */
157 unsigned long hw_cr[5];
158
159 struct vlapic vlapic;
160 s64 cache_tsc_offset;
161 u64 guest_time;
162
163 /* Lock and list for virtual platform timers. */
164 spinlock_t tm_lock;
165 struct list_head tm_list;
166
167 bool flag_dr_dirty;
168 bool debug_state_latch;
169 bool single_step;
170
171 struct hvm_vcpu_asid n1asid;
172
173 u32 msr_tsc_aux;
174 u64 msr_tsc_adjust;
175 u64 msr_xss;
176
177 union {
178 struct arch_vmx_struct vmx;
179 struct arch_svm_struct svm;
180 } u;
181
182 struct tasklet assert_evtchn_irq_tasklet;
183
184 struct nestedvcpu nvcpu;
185
186 struct altp2mvcpu avcpu;
187
188 struct mtrr_state mtrr;
189 u64 pat_cr;
190
191 /* In mode delay_for_missed_ticks, VCPUs have differing guest times. */
192 int64_t stime_offset;
193
194 u8 evtchn_upcall_vector;
195
196 /* Which cache mode is this VCPU in (CR0:CD/NW)? */
197 u8 cache_mode;
198
199 struct hvm_vcpu_io hvm_io;
200
201 /* Callback into x86_emulate when emulating FPU/MMX/XMM instructions. */
202 void (*fpu_exception_callback)(void *, struct cpu_user_regs *);
203 void *fpu_exception_callback_arg;
204
205 /* Pending hw/sw interrupt (.vector = -1 means nothing pending). */
206 struct x86_event inject_event;
207
208 struct viridian_vcpu viridian;
209 };
210
211 #endif /* __ASM_X86_HVM_VCPU_H__ */
212
213 /*
214 * Local variables:
215 * mode: C
216 * c-file-style: "BSD"
217 * c-basic-offset: 4
218 * tab-width: 4
219 * indent-tabs-mode: nil
220 * End:
221 */
222