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/vlapic.h>
24 #include <asm/hvm/vmx/vmcs.h>
25 #include <asm/hvm/vmx/vvmx.h>
26 #include <asm/hvm/svm/vmcb.h>
27 #include <asm/hvm/svm/nestedsvm.h>
28 #include <asm/mtrr.h>
29 #include <public/hvm/ioreq.h>
30
31 enum hvm_io_completion {
32 HVMIO_no_completion,
33 HVMIO_mmio_completion,
34 HVMIO_pio_completion,
35 HVMIO_realmode_completion
36 };
37
38 struct hvm_vcpu_asid {
39 uint64_t generation;
40 uint32_t asid;
41 };
42
43 /*
44 * We may read or write up to m512 as a number of device-model
45 * transactions.
46 */
47 struct hvm_mmio_cache {
48 unsigned long gla;
49 unsigned int size;
50 uint8_t dir;
51 uint8_t buffer[64] __aligned(sizeof(long));
52 };
53
54 struct hvm_vcpu_io {
55 /* I/O request in flight to device model. */
56 enum hvm_io_completion io_completion;
57 ioreq_t io_req;
58
59 /*
60 * HVM emulation:
61 * Linear address @mmio_gla maps to MMIO physical frame @mmio_gpfn.
62 * The latter is known to be an MMIO frame (not RAM).
63 * This translation is only valid for accesses as per @mmio_access.
64 */
65 struct npfec mmio_access;
66 unsigned long mmio_gla;
67 unsigned long mmio_gpfn;
68
69 /*
70 * We may need to handle up to 3 distinct memory accesses per
71 * instruction.
72 */
73 struct hvm_mmio_cache mmio_cache[3];
74 unsigned int mmio_cache_count;
75
76 /* For retries we shouldn't re-fetch the instruction. */
77 unsigned int mmio_insn_bytes;
78 unsigned char mmio_insn[16];
79 struct hvmemul_cache *cache;
80
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_ioreq_needs_completion(const ioreq_t * ioreq)94 static inline bool hvm_ioreq_needs_completion(const ioreq_t *ioreq)
95 {
96 return ioreq->state == STATE_IOREQ_READY &&
97 !ioreq->data_is_ptr &&
98 (ioreq->type != IOREQ_TYPE_PIO || ioreq->dir != IOREQ_WRITE);
99 }
100
101 struct nestedvcpu {
102 bool_t nv_guestmode; /* vcpu in guestmode? */
103 void *nv_vvmcx; /* l1 guest virtual VMCB/VMCS */
104 void *nv_n1vmcx; /* VMCB/VMCS used to run l1 guest */
105 void *nv_n2vmcx; /* shadow VMCB/VMCS used to run l2 guest */
106
107 uint64_t nv_vvmcxaddr; /* l1 guest physical address of nv_vvmcx */
108 paddr_t nv_n1vmcx_pa; /* host physical address of nv_n1vmcx */
109 paddr_t nv_n2vmcx_pa; /* host physical address of nv_n2vmcx */
110
111 /* SVM/VMX arch specific */
112 union {
113 struct nestedsvm nsvm;
114 struct nestedvmx nvmx;
115 } u;
116
117 bool_t nv_flushp2m; /* True, when p2m table must be flushed */
118 struct p2m_domain *nv_p2m; /* used p2m table for this vcpu */
119 bool stale_np2m; /* True when p2m_base in VMCx02 is no longer valid */
120 uint64_t np2m_generation;
121
122 struct hvm_vcpu_asid nv_n2asid;
123
124 bool_t nv_vmentry_pending;
125 bool_t nv_vmexit_pending;
126 bool_t nv_vmswitch_in_progress; /* true during vmentry/vmexit emulation */
127
128 /* Does l1 guest intercept io ports 0x80 and/or 0xED ?
129 * Useful to optimize io permission handling.
130 */
131 bool_t nv_ioport80;
132 bool_t nv_ioportED;
133
134 /* L2's control-resgister, just as the L2 sees them. */
135 unsigned long guest_cr[5];
136 };
137
138 #define vcpu_nestedhvm(v) ((v)->arch.hvm.nvcpu)
139
140 struct altp2mvcpu {
141 /*
142 * #VE information page. This pointer being non-NULL indicates that a
143 * VMCS's VIRT_EXCEPTION_INFO field is pointing to the page, and an extra
144 * page reference is held.
145 */
146 struct page_info *veinfo_pg;
147 uint16_t p2midx; /* alternate p2m index */
148 };
149
150 #define vcpu_altp2m(v) ((v)->arch.hvm.avcpu)
151
152 struct hvm_vcpu {
153 /* Guest control-register and EFER values, just as the guest sees them. */
154 unsigned long guest_cr[5];
155 unsigned long guest_efer;
156
157 /*
158 * Processor-visible control-register values, while guest executes.
159 * CR0, CR4: Used as a cache of VMCS contents by VMX only.
160 * CR1, CR2: Never used (guest_cr[2] is always processor-visible CR2).
161 * CR3: Always used and kept up to date by paging subsystem.
162 */
163 unsigned long hw_cr[5];
164
165 struct vlapic vlapic;
166 s64 cache_tsc_offset;
167 u64 guest_time;
168
169 /* Lock and list for virtual platform timers. */
170 spinlock_t tm_lock;
171 struct list_head tm_list;
172
173 bool flag_dr_dirty;
174 bool debug_state_latch;
175 bool single_step;
176 struct {
177 bool enabled;
178 uint16_t p2midx;
179 } fast_single_step;
180
181 /* (MFN) hypervisor page table */
182 pagetable_t monitor_table;
183
184 struct hvm_vcpu_asid n1asid;
185
186 u64 msr_tsc_adjust;
187
188 union {
189 struct vmx_vcpu vmx;
190 struct svm_vcpu svm;
191 };
192
193 struct tasklet assert_evtchn_irq_tasklet;
194
195 struct nestedvcpu nvcpu;
196
197 struct altp2mvcpu avcpu;
198
199 struct mtrr_state mtrr;
200 u64 pat_cr;
201
202 /* In mode delay_for_missed_ticks, VCPUs have differing guest times. */
203 int64_t stime_offset;
204
205 u8 evtchn_upcall_vector;
206
207 /* Which cache mode is this VCPU in (CR0:CD/NW)? */
208 u8 cache_mode;
209
210 struct hvm_vcpu_io hvm_io;
211
212 /* Pending hw/sw interrupt (.vector = -1 means nothing pending). */
213 struct x86_event inject_event;
214
215 struct viridian_vcpu *viridian;
216 };
217
218 #endif /* __ASM_X86_HVM_VCPU_H__ */
219
220 /*
221 * Local variables:
222 * mode: C
223 * c-file-style: "BSD"
224 * c-basic-offset: 4
225 * tab-width: 4
226 * indent-tabs-mode: nil
227 * End:
228 */
229