ia64/xen-unstable

view xen/arch/ia64/vmx/vmx_init.c @ 15558:f536eb8576ee

[IA64] Fix VTi domain shutdown

Event channel destruction is now done earlier, this patch does
the corresponding modification in IA64 side. It fixes dom0 crash
when VTI destroyed.

Signed-off-by: Zhang Xin <xing.z.zhang@intel.com>
author Alex Williamson <alex.williamson@hp.com>
date Wed Jul 11 11:32:30 2007 -0600 (2007-07-11)
parents a371cfbd62e8
children c95959a0cf9c
line source
1 /* -*- Mode:C; c-basic-offset:4; tab-width:4; indent-tabs-mode:nil -*- */
2 /*
3 * vmx_init.c: initialization work for vt specific domain
4 * Copyright (c) 2005, Intel Corporation.
5 * Kun Tian (Kevin Tian) <kevin.tian@intel.com>
6 * Xuefei Xu (Anthony Xu) <anthony.xu@intel.com>
7 * Fred Yang <fred.yang@intel.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms and conditions of the GNU General Public License,
11 * version 2, as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along with
19 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
20 * Place - Suite 330, Boston, MA 02111-1307 USA.
21 *
22 */
24 /*
25 * 05/08/16 Kun tian (Kevin Tian) <kevin.tian@intel.com>:
26 * Disable doubling mapping
27 *
28 * 05/03/23 Kun Tian (Kevin Tian) <kevin.tian@intel.com>:
29 * Simplied design in first step:
30 * - One virtual environment
31 * - Domain is bound to one LP
32 * Later to support guest SMP:
33 * - Need interface to handle VP scheduled to different LP
34 */
35 #include <xen/config.h>
36 #include <xen/types.h>
37 #include <xen/sched.h>
38 #include <asm/pal.h>
39 #include <asm/page.h>
40 #include <asm/processor.h>
41 #include <asm/vmx_vcpu.h>
42 #include <xen/lib.h>
43 #include <asm/vmmu.h>
44 #include <public/xen.h>
45 #include <public/hvm/ioreq.h>
46 #include <public/event_channel.h>
47 #include <asm/vmx_phy_mode.h>
48 #include <asm/processor.h>
49 #include <asm/vmx.h>
50 #include <xen/mm.h>
51 #include <asm/viosapic.h>
52 #include <xen/event.h>
53 #include <asm/vlsapic.h>
54 #include "entry.h"
56 /* Global flag to identify whether Intel vmx feature is on */
57 u32 vmx_enabled = 0;
58 static u32 vm_order;
59 static u64 buffer_size;
60 static u64 vp_env_info;
61 static u64 vm_buffer = 0; /* Buffer required to bring up VMX feature */
62 u64 __vsa_base = 0; /* Run-time service base of VMX */
64 /* Check whether vt feature is enabled or not. */
65 void
66 identify_vmx_feature(void)
67 {
68 pal_status_t ret;
69 u64 avail = 1, status = 1, control = 1;
71 vmx_enabled = 0;
72 /* Check VT-i feature */
73 ret = ia64_pal_proc_get_features(&avail, &status, &control);
74 if (ret != PAL_STATUS_SUCCESS) {
75 printk("Get proc features failed.\n");
76 goto no_vti;
77 }
79 /* FIXME: do we need to check status field, to see whether
80 * PSR.vm is actually enabled? If yes, aonther call to
81 * ia64_pal_proc_set_features may be reuqired then.
82 */
83 printk("avail:0x%lx, status:0x%lx,control:0x%lx, vm?0x%lx\n",
84 avail, status, control, avail & PAL_PROC_VM_BIT);
85 if (!(avail & PAL_PROC_VM_BIT)) {
86 printk("No VT feature supported.\n");
87 goto no_vti;
88 }
90 ret = ia64_pal_vp_env_info(&buffer_size, &vp_env_info);
91 if (ret != PAL_STATUS_SUCCESS) {
92 printk("Get vp environment info failed.\n");
93 goto no_vti;
94 }
96 /* Does xen has ability to decode itself? */
97 if (!(vp_env_info & VP_OPCODE))
98 printk("WARNING: no opcode provided from hardware(%lx)!!!\n", vp_env_info);
99 vm_order = get_order(buffer_size);
100 printk("vm buffer size: %ld, order: %d\n", buffer_size, vm_order);
102 vmx_enabled = 1;
103 no_vti:
104 return;
105 }
107 /*
108 * Init virtual environment on current LP
109 * vsa_base is the indicator whether it's first LP to be initialized
110 * for current domain.
111 */
112 void
113 vmx_init_env(void)
114 {
115 u64 status, tmp_base;
117 if (!vm_buffer) {
118 vm_buffer = (unsigned long)alloc_xenheap_pages(vm_order);
119 ASSERT(vm_buffer);
120 printk("vm_buffer: 0x%lx\n", vm_buffer);
121 }
123 status=ia64_pal_vp_init_env(__vsa_base ? VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
124 __pa(vm_buffer),
125 vm_buffer,
126 &tmp_base);
128 if (status != PAL_STATUS_SUCCESS) {
129 printk("ia64_pal_vp_init_env failed.\n");
130 return ;
131 }
133 if (!__vsa_base)
134 __vsa_base = tmp_base;
135 else
136 ASSERT(tmp_base == __vsa_base);
138 }
140 typedef union {
141 u64 value;
142 struct {
143 u64 number : 8;
144 u64 revision : 8;
145 u64 model : 8;
146 u64 family : 8;
147 u64 archrev : 8;
148 u64 rv : 24;
149 };
150 } cpuid3_t;
152 /* Allocate vpd from xenheap */
153 static vpd_t *alloc_vpd(void)
154 {
155 int i;
156 cpuid3_t cpuid3;
157 vpd_t *vpd;
158 mapped_regs_t *mregs;
160 vpd = alloc_xenheap_pages(get_order(VPD_SIZE));
161 if (!vpd) {
162 printk("VPD allocation failed.\n");
163 return NULL;
164 }
166 printk(XENLOG_DEBUG "vpd base: 0x%p, vpd size:%ld\n",
167 vpd, sizeof(vpd_t));
168 memset(vpd, 0, VPD_SIZE);
169 mregs = &vpd->vpd_low;
171 /* CPUID init */
172 for (i = 0; i < 5; i++)
173 mregs->vcpuid[i] = ia64_get_cpuid(i);
175 /* Limit the CPUID number to 5 */
176 cpuid3.value = mregs->vcpuid[3];
177 cpuid3.number = 4; /* 5 - 1 */
178 mregs->vcpuid[3] = cpuid3.value;
180 mregs->vac.a_from_int_cr = 1;
181 mregs->vac.a_to_int_cr = 1;
182 mregs->vac.a_from_psr = 1;
183 mregs->vac.a_from_cpuid = 1;
184 mregs->vac.a_cover = 1;
185 mregs->vac.a_bsw = 1;
186 mregs->vac.a_int = 1;
187 mregs->vdc.d_vmsw = 1;
189 return vpd;
190 }
192 /* Free vpd to xenheap */
193 static void
194 free_vpd(struct vcpu *v)
195 {
196 if ( v->arch.privregs )
197 free_xenheap_pages(v->arch.privregs, get_order(VPD_SIZE));
198 }
200 /*
201 * Create a VP on intialized VMX environment.
202 */
203 static void
204 vmx_create_vp(struct vcpu *v)
205 {
206 u64 ret;
207 vpd_t *vpd = (vpd_t *)v->arch.privregs;
208 u64 ivt_base;
209 extern char vmx_ia64_ivt;
210 /* ia64_ivt is function pointer, so need this tranlation */
211 ivt_base = (u64) &vmx_ia64_ivt;
212 printk(XENLOG_DEBUG "ivt_base: 0x%lx\n", ivt_base);
213 ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)ivt_base, 0);
214 if (ret != PAL_STATUS_SUCCESS){
215 panic_domain(vcpu_regs(v),"ia64_pal_vp_create failed. \n");
216 }
217 }
219 /* Other non-context related tasks can be done in context switch */
220 void
221 vmx_save_state(struct vcpu *v)
222 {
223 u64 status;
225 /* FIXME: about setting of pal_proc_vector... time consuming */
226 status = ia64_pal_vp_save((u64 *)v->arch.privregs, 0);
227 if (status != PAL_STATUS_SUCCESS){
228 panic_domain(vcpu_regs(v),"Save vp status failed\n");
229 }
232 /* Need to save KR when domain switch, though HV itself doesn;t
233 * use them.
234 */
235 v->arch.arch_vmx.vkr[0] = ia64_get_kr(0);
236 v->arch.arch_vmx.vkr[1] = ia64_get_kr(1);
237 v->arch.arch_vmx.vkr[2] = ia64_get_kr(2);
238 v->arch.arch_vmx.vkr[3] = ia64_get_kr(3);
239 v->arch.arch_vmx.vkr[4] = ia64_get_kr(4);
240 v->arch.arch_vmx.vkr[5] = ia64_get_kr(5);
241 v->arch.arch_vmx.vkr[6] = ia64_get_kr(6);
242 v->arch.arch_vmx.vkr[7] = ia64_get_kr(7);
243 }
245 /* Even guest is in physical mode, we still need such double mapping */
246 void
247 vmx_load_state(struct vcpu *v)
248 {
249 u64 status;
251 status = ia64_pal_vp_restore((u64 *)v->arch.privregs, 0);
252 if (status != PAL_STATUS_SUCCESS){
253 panic_domain(vcpu_regs(v),"Restore vp status failed\n");
254 }
256 ia64_set_kr(0, v->arch.arch_vmx.vkr[0]);
257 ia64_set_kr(1, v->arch.arch_vmx.vkr[1]);
258 ia64_set_kr(2, v->arch.arch_vmx.vkr[2]);
259 ia64_set_kr(3, v->arch.arch_vmx.vkr[3]);
260 ia64_set_kr(4, v->arch.arch_vmx.vkr[4]);
261 ia64_set_kr(5, v->arch.arch_vmx.vkr[5]);
262 ia64_set_kr(6, v->arch.arch_vmx.vkr[6]);
263 ia64_set_kr(7, v->arch.arch_vmx.vkr[7]);
264 /* Guest vTLB is not required to be switched explicitly, since
265 * anchored in vcpu */
266 }
268 static void vmx_create_event_channels(struct vcpu *v)
269 {
270 vcpu_iodata_t *p;
271 struct vcpu *o;
273 if (v->vcpu_id == 0) {
274 /* Ugly: create event channels for every vcpu when vcpu 0
275 starts, so that they're available for ioemu to bind to. */
276 for_each_vcpu(v->domain, o) {
277 p = get_vio(v->domain, o->vcpu_id);
278 o->arch.arch_vmx.xen_port = p->vp_eport =
279 alloc_unbound_xen_event_channel(o, 0);
280 gdprintk(XENLOG_INFO, "Allocated port %ld for hvm.\n",
281 o->arch.arch_vmx.xen_port);
282 }
283 }
284 }
286 /*
287 * Event channel has destoryed in domain_kill(), so we needn't
288 * do anything here
289 */
290 static void vmx_release_assist_channel(struct vcpu *v)
291 {
292 return;
293 }
295 /*
296 * Initialize VMX envirenment for guest. Only the 1st vp/vcpu
297 * is registered here.
298 */
299 int
300 vmx_final_setup_guest(struct vcpu *v)
301 {
302 vpd_t *vpd;
303 int rc;
304 struct switch_stack *sw;
306 vpd = alloc_vpd();
307 ASSERT(vpd);
308 if (!vpd)
309 return -ENOMEM;
311 v->arch.privregs = (mapped_regs_t *)vpd;
312 vcpu_share_privregs_with_guest(v);
313 vpd->vpd_low.virt_env_vaddr = vm_buffer;
315 v->domain->arch.vmx_platform.gos_type = OS_UNKNOWN;
316 /* Per-domain vTLB and vhpt implementation. Now vmx domain will stick
317 * to this solution. Maybe it can be deferred until we know created
318 * one as vmx domain */
319 #ifndef HASH_VHPT
320 rc = init_domain_tlb(v);
321 if (rc)
322 return rc;
323 #endif
324 vmx_create_event_channels(v);
326 /* v->arch.schedule_tail = arch_vmx_do_launch; */
327 vmx_create_vp(v);
329 /* Physical mode emulation initialization, including
330 * emulation ID allcation and related memory request
331 */
332 physical_mode_init(v);
334 vlsapic_reset(v);
335 vtm_init(v);
337 /* Set up guest 's indicator for VTi domain*/
338 set_bit(ARCH_VMX_DOMAIN, &v->arch.arch_vmx.flags);
340 /* Initialize pNonSys=1 for the first context switching */
341 sw = (struct switch_stack *)vcpu_regs(v) - 1;
342 sw->pr = (1UL << PRED_NON_SYSCALL);
344 return 0;
345 }
347 void
348 vmx_relinquish_guest_resources(struct domain *d)
349 {
350 struct vcpu *v;
352 for_each_vcpu(d, v)
353 vmx_release_assist_channel(v);
355 vacpi_relinquish_resources(d);
356 }
358 void
359 vmx_relinquish_vcpu_resources(struct vcpu *v)
360 {
361 vtime_t *vtm = &(v->arch.arch_vmx.vtm);
363 kill_timer(&vtm->vtm_timer);
365 free_domain_tlb(v);
366 free_vpd(v);
367 }
369 typedef struct io_range {
370 unsigned long start;
371 unsigned long size;
372 unsigned long type;
373 } io_range_t;
375 static const io_range_t io_ranges[] = {
376 {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
377 {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
378 {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
379 {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
380 {PIB_START, PIB_SIZE, GPFN_PIB},
381 };
383 // The P2M table is built in libxc/ia64/xc_ia64_hvm_build.c @ setup_guest()
384 // so only mark IO memory space here
385 static void vmx_build_io_physmap_table(struct domain *d)
386 {
387 unsigned long i, j;
389 /* Mark I/O ranges */
390 for (i = 0; i < (sizeof(io_ranges) / sizeof(io_range_t)); i++) {
391 for (j = io_ranges[i].start;
392 j < io_ranges[i].start + io_ranges[i].size; j += PAGE_SIZE)
393 (void)__assign_domain_page(d, j, io_ranges[i].type,
394 ASSIGN_writable);
395 }
397 }
399 void vmx_setup_platform(struct domain *d)
400 {
401 ASSERT(d != dom0); /* only for non-privileged vti domain */
403 vmx_build_io_physmap_table(d);
405 d->arch.vmx_platform.shared_page_va =
406 (unsigned long)__va(__gpa_to_mpa(d, IO_PAGE_START));
407 /* For buffered IO requests. */
408 spin_lock_init(&d->arch.hvm_domain.buffered_io_lock);
409 d->arch.hvm_domain.buffered_io_va =
410 (unsigned long)__va(__gpa_to_mpa(d, BUFFER_IO_PAGE_START));
411 d->arch.hvm_domain.buffered_pio_va =
412 (unsigned long)__va(__gpa_to_mpa(d, BUFFER_PIO_PAGE_START));
413 /* TEMP */
414 d->arch.vmx_platform.pib_base = 0xfee00000UL;
416 d->arch.sal_data = xmalloc(struct xen_sal_data);
418 /* Only open one port for I/O and interrupt emulation */
419 memset(&d->shared_info->evtchn_mask[0], 0xff,
420 sizeof(d->shared_info->evtchn_mask));
422 /* Initialize iosapic model within hypervisor */
423 viosapic_init(d);
425 vacpi_init(d);
426 }
428 void vmx_do_launch(struct vcpu *v)
429 {
430 vmx_load_all_rr(v);
431 }