2 * Copyright (c) 2014 Roger Pau Monné <roger.pau@citrix.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
36 #include <sys/systm.h>
41 #include <machine/cpufunc.h>
42 #include <machine/cpu.h>
43 #include <machine/intr_machdep.h>
44 #include <machine/md_var.h>
45 #include <machine/smp.h>
47 #include <x86/apicreg.h>
48 #include <x86/apicvar.h>
50 #include <xen/xen-os.h>
51 #include <xen/features.h>
52 #include <xen/gnttab.h>
53 #include <xen/hypervisor.h>
55 #include <xen/xen_intr.h>
57 #include <xen/interface/vcpu.h>
59 /*--------------------------------- Macros -----------------------------------*/
61 #define XEN_APIC_UNSUPPORTED \
62 panic("%s: not available in Xen PV port.", __func__)
65 /*--------------------------- Forward Declarations ---------------------------*/
67 static driver_filter_t xen_smp_rendezvous_action;
68 static driver_filter_t xen_invltlb;
69 static driver_filter_t xen_invlpg;
70 static driver_filter_t xen_invlrng;
71 static driver_filter_t xen_invlcache;
72 static driver_filter_t xen_ipi_bitmap_handler;
73 static driver_filter_t xen_cpustop_handler;
74 static driver_filter_t xen_cpususpend_handler;
75 static driver_filter_t xen_cpustophard_handler;
78 /*---------------------------------- Macros ----------------------------------*/
79 #define IPI_TO_IDX(ipi) ((ipi) - APIC_IPI_INTS)
81 /*--------------------------------- Xen IPIs ---------------------------------*/
83 struct xen_ipi_handler
85 driver_filter_t *filter;
86 const char *description;
89 static struct xen_ipi_handler xen_ipis[] =
91 [IPI_TO_IDX(IPI_RENDEZVOUS)] = { xen_smp_rendezvous_action, "r" },
92 [IPI_TO_IDX(IPI_INVLTLB)] = { xen_invltlb, "itlb"},
93 [IPI_TO_IDX(IPI_INVLPG)] = { xen_invlpg, "ipg" },
94 [IPI_TO_IDX(IPI_INVLRNG)] = { xen_invlrng, "irg" },
95 [IPI_TO_IDX(IPI_INVLCACHE)] = { xen_invlcache, "ic" },
96 [IPI_TO_IDX(IPI_BITMAP_VECTOR)] = { xen_ipi_bitmap_handler, "b" },
97 [IPI_TO_IDX(IPI_STOP)] = { xen_cpustop_handler, "st" },
98 [IPI_TO_IDX(IPI_SUSPEND)] = { xen_cpususpend_handler, "sp" },
99 [IPI_TO_IDX(IPI_STOP_HARD)] = { xen_cpustophard_handler, "sth" },
103 /*------------------------------- Per-CPU Data -------------------------------*/
105 DPCPU_DEFINE(xen_intr_handle_t, ipi_handle[nitems(xen_ipis)]);
108 /*------------------------------- Xen PV APIC --------------------------------*/
111 xen_pv_lapic_create(u_int apic_id, int boot_cpu)
114 cpu_add(apic_id, boot_cpu);
119 xen_pv_lapic_init(vm_paddr_t addr)
125 xen_pv_lapic_setup(int boot)
131 xen_pv_lapic_dump(const char *str)
134 printf("cpu%d %s XEN PV LAPIC\n", PCPU_GET(cpuid), str);
138 xen_pv_lapic_disable(void)
144 xen_pv_lapic_is_x2apic(void)
151 xen_pv_lapic_eoi(void)
154 XEN_APIC_UNSUPPORTED;
158 xen_pv_lapic_id(void)
161 return (PCPU_GET(apic_id));
165 xen_pv_lapic_intr_pending(u_int vector)
168 XEN_APIC_UNSUPPORTED;
173 xen_pv_apic_cpuid(u_int apic_id)
176 return (apic_cpuids[apic_id]);
183 xen_pv_apic_alloc_vector(u_int apic_id, u_int irq)
186 XEN_APIC_UNSUPPORTED;
191 xen_pv_apic_alloc_vectors(u_int apic_id, u_int *irqs, u_int count, u_int align)
194 XEN_APIC_UNSUPPORTED;
199 xen_pv_apic_disable_vector(u_int apic_id, u_int vector)
202 XEN_APIC_UNSUPPORTED;
206 xen_pv_apic_enable_vector(u_int apic_id, u_int vector)
209 XEN_APIC_UNSUPPORTED;
213 xen_pv_apic_free_vector(u_int apic_id, u_int vector, u_int irq)
216 XEN_APIC_UNSUPPORTED;
220 xen_pv_lapic_set_logical_id(u_int apic_id, u_int cluster, u_int cluster_id)
223 XEN_APIC_UNSUPPORTED;
227 xen_pv_lapic_enable_pmc(void)
230 XEN_APIC_UNSUPPORTED;
235 xen_pv_lapic_disable_pmc(void)
238 XEN_APIC_UNSUPPORTED;
242 xen_pv_lapic_reenable_pmc(void)
245 XEN_APIC_UNSUPPORTED;
249 xen_pv_lapic_enable_cmc(void)
256 xen_pv_lapic_ipi_raw(register_t icrlo, u_int dest)
259 XEN_APIC_UNSUPPORTED;
263 xen_pv_lapic_ipi_vectored(u_int vector, int dest)
265 xen_intr_handle_t *ipi_handle;
266 int ipi_idx, to_cpu, self;
268 ipi_idx = IPI_TO_IDX(vector);
269 if (ipi_idx >= nitems(xen_ipis))
270 panic("IPI out of range");
273 case APIC_IPI_DEST_SELF:
274 ipi_handle = DPCPU_GET(ipi_handle);
275 xen_intr_signal(ipi_handle[ipi_idx]);
277 case APIC_IPI_DEST_ALL:
278 CPU_FOREACH(to_cpu) {
279 ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle);
280 xen_intr_signal(ipi_handle[ipi_idx]);
283 case APIC_IPI_DEST_OTHERS:
284 self = PCPU_GET(cpuid);
285 CPU_FOREACH(to_cpu) {
286 if (to_cpu != self) {
287 ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle);
288 xen_intr_signal(ipi_handle[ipi_idx]);
293 to_cpu = apic_cpuid(dest);
294 ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle);
295 xen_intr_signal(ipi_handle[ipi_idx]);
301 xen_pv_lapic_ipi_wait(int delay)
304 XEN_APIC_UNSUPPORTED;
310 xen_pv_lapic_ipi_alloc(inthand_t *ipifunc)
313 XEN_APIC_UNSUPPORTED;
318 xen_pv_lapic_ipi_free(int vector)
321 XEN_APIC_UNSUPPORTED;
325 xen_pv_lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked)
328 XEN_APIC_UNSUPPORTED;
333 xen_pv_lapic_set_lvt_mode(u_int apic_id, u_int lvt, uint32_t mode)
336 XEN_APIC_UNSUPPORTED;
341 xen_pv_lapic_set_lvt_polarity(u_int apic_id, u_int lvt, enum intr_polarity pol)
344 XEN_APIC_UNSUPPORTED;
349 xen_pv_lapic_set_lvt_triggermode(u_int apic_id, u_int lvt,
350 enum intr_trigger trigger)
353 XEN_APIC_UNSUPPORTED;
357 /* Xen apic_ops implementation */
358 struct apic_ops xen_apic_ops = {
359 .create = xen_pv_lapic_create,
360 .init = xen_pv_lapic_init,
361 .xapic_mode = xen_pv_lapic_disable,
362 .is_x2apic = xen_pv_lapic_is_x2apic,
363 .setup = xen_pv_lapic_setup,
364 .dump = xen_pv_lapic_dump,
365 .disable = xen_pv_lapic_disable,
366 .eoi = xen_pv_lapic_eoi,
367 .id = xen_pv_lapic_id,
368 .intr_pending = xen_pv_lapic_intr_pending,
369 .set_logical_id = xen_pv_lapic_set_logical_id,
370 .cpuid = xen_pv_apic_cpuid,
371 .alloc_vector = xen_pv_apic_alloc_vector,
372 .alloc_vectors = xen_pv_apic_alloc_vectors,
373 .enable_vector = xen_pv_apic_enable_vector,
374 .disable_vector = xen_pv_apic_disable_vector,
375 .free_vector = xen_pv_apic_free_vector,
376 .enable_pmc = xen_pv_lapic_enable_pmc,
377 .disable_pmc = xen_pv_lapic_disable_pmc,
378 .reenable_pmc = xen_pv_lapic_reenable_pmc,
379 .enable_cmc = xen_pv_lapic_enable_cmc,
381 .ipi_raw = xen_pv_lapic_ipi_raw,
382 .ipi_vectored = xen_pv_lapic_ipi_vectored,
383 .ipi_wait = xen_pv_lapic_ipi_wait,
385 .ipi_alloc = xen_pv_lapic_ipi_alloc,
386 .ipi_free = xen_pv_lapic_ipi_free,
387 .set_lvt_mask = xen_pv_lapic_set_lvt_mask,
388 .set_lvt_mode = xen_pv_lapic_set_lvt_mode,
389 .set_lvt_polarity = xen_pv_lapic_set_lvt_polarity,
390 .set_lvt_triggermode = xen_pv_lapic_set_lvt_triggermode,
394 /*---------------------------- XEN PV IPI Handlers ---------------------------*/
396 * These are C clones of the ASM functions found in apic_vector.
399 xen_ipi_bitmap_handler(void *arg)
401 struct trapframe *frame;
404 ipi_bitmap_handler(*frame);
405 return (FILTER_HANDLED);
409 xen_smp_rendezvous_action(void *arg)
412 (*ipi_rendezvous_counts[PCPU_GET(cpuid)])++;
413 #endif /* COUNT_IPIS */
415 smp_rendezvous_action();
416 return (FILTER_HANDLED);
420 xen_invltlb(void *arg)
424 return (FILTER_HANDLED);
429 xen_invltlb_invpcid(void *arg)
432 invltlb_invpcid_handler();
433 return (FILTER_HANDLED);
437 xen_invltlb_pcid(void *arg)
440 invltlb_pcid_handler();
441 return (FILTER_HANDLED);
445 xen_invltlb_invpcid_pti(void *arg)
448 invltlb_invpcid_pti_handler();
449 return (FILTER_HANDLED);
453 xen_invlpg_invpcid_handler(void *arg)
456 invlpg_invpcid_handler();
457 return (FILTER_HANDLED);
461 xen_invlpg_pcid_handler(void *arg)
464 invlpg_pcid_handler();
465 return (FILTER_HANDLED);
469 xen_invlrng_invpcid_handler(void *arg)
472 invlrng_invpcid_handler();
473 return (FILTER_HANDLED);
477 xen_invlrng_pcid_handler(void *arg)
480 invlrng_pcid_handler();
481 return (FILTER_HANDLED);
486 xen_invlpg(void *arg)
490 return (FILTER_HANDLED);
494 xen_invlrng(void *arg)
498 return (FILTER_HANDLED);
502 xen_invlcache(void *arg)
506 return (FILTER_HANDLED);
510 xen_cpustop_handler(void *arg)
514 return (FILTER_HANDLED);
518 xen_cpususpend_handler(void *arg)
521 cpususpend_handler();
522 return (FILTER_HANDLED);
526 xen_cpustophard_handler(void *arg)
530 return (FILTER_HANDLED);
533 /*----------------------------- XEN PV IPI setup -----------------------------*/
535 * Those functions are provided outside of the Xen PV APIC implementation
536 * so PVHVM guests can also use PV IPIs without having an actual Xen PV APIC,
537 * because on PVHVM there's an emulated LAPIC provided by Xen.
540 xen_cpu_ipi_init(int cpu)
542 xen_intr_handle_t *ipi_handle;
543 const struct xen_ipi_handler *ipi;
546 ipi_handle = DPCPU_ID_GET(cpu, ipi_handle);
548 for (ipi = xen_ipis, idx = 0; idx < nitems(xen_ipis); ipi++, idx++) {
550 if (ipi->filter == NULL) {
551 ipi_handle[idx] = NULL;
555 rc = xen_intr_alloc_and_bind_ipi(cpu, ipi->filter,
556 INTR_TYPE_TTY, &ipi_handle[idx]);
558 panic("Unable to allocate a XEN IPI port");
559 xen_intr_describe(ipi_handle[idx], "%s", ipi->description);
568 if (!xen_vector_callback_enabled)
572 if (pmap_pcid_enabled) {
574 xen_ipis[IPI_TO_IDX(IPI_INVLTLB)].filter =
575 invpcid_works ? xen_invltlb_invpcid_pti :
578 xen_ipis[IPI_TO_IDX(IPI_INVLTLB)].filter =
579 invpcid_works ? xen_invltlb_invpcid :
581 xen_ipis[IPI_TO_IDX(IPI_INVLPG)].filter = invpcid_works ?
582 xen_invlpg_invpcid_handler : xen_invlpg_pcid_handler;
583 xen_ipis[IPI_TO_IDX(IPI_INVLRNG)].filter = invpcid_works ?
584 xen_invlrng_invpcid_handler : xen_invlrng_pcid_handler;
590 /* Set the xen pv ipi ops to replace the native ones */
591 if (xen_hvm_domain())
592 apic_ops.ipi_vectored = xen_pv_lapic_ipi_vectored;
595 /* We need to setup IPIs before APs are started */
596 SYSINIT(xen_setup_cpus, SI_SUB_SMP-1, SI_ORDER_FIRST, xen_setup_cpus, NULL);