/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* derived from netbsd's xen_machdep.c 1.1.2.1 */ /* * * Copyright (c) 2004 Christian Limpach. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. This section intentionally left blank. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Section 3 of the above license was updated in response to bug 6379571. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEBUG #define SUSPEND_DEBUG if (xen_suspend_debug) xen_printf #else #define SUSPEND_DEBUG(...) #endif int cpr_debug; cpuset_t cpu_suspend_lost_set; static int xen_suspend_debug; /* * Determine helpful version information. * * (And leave copies in the data segment so we can look at them later * with e.g. kmdb.) */ typedef enum xen_version { XENVER_BOOT_IDX, XENVER_CURRENT_IDX } xen_version_t; struct xenver { ulong_t xv_major; ulong_t xv_minor; ulong_t xv_revision; xen_extraversion_t xv_ver; ulong_t xv_is_xvm; xen_changeset_info_t xv_chgset; xen_compile_info_t xv_build; xen_capabilities_info_t xv_caps; } xenver[2]; #define XENVER_BOOT(m) (xenver[XENVER_BOOT_IDX].m) #define XENVER_CURRENT(m) (xenver[XENVER_CURRENT_IDX].m) /* * Update the xenver data. We maintain two copies, boot and * current. If we are setting the boot, then also set current. */ static void xen_set_version(xen_version_t idx) { ulong_t ver; bzero(&xenver[idx], sizeof (xenver[idx])); ver = HYPERVISOR_xen_version(XENVER_version, 0); xenver[idx].xv_major = BITX(ver, 31, 16); xenver[idx].xv_minor = BITX(ver, 15, 0); (void) HYPERVISOR_xen_version(XENVER_extraversion, &xenver[idx].xv_ver); /* * The revision is buried in the extraversion information that is * maintained by the hypervisor. For our purposes we expect that * the revision number is: * - the second character in the extraversion information * - one character long * - numeric digit * If it isn't then we can't extract the revision and we leave it * set to 0. */ if (strlen(xenver[idx].xv_ver) > 1 && isdigit(xenver[idx].xv_ver[1])) xenver[idx].xv_revision = xenver[idx].xv_ver[1] - '0'; else cmn_err(CE_WARN, "Cannot extract revision on this hypervisor " "version: v%s, unexpected version format", xenver[idx].xv_ver); xenver[idx].xv_is_xvm = 0; if (strlen(xenver[idx].xv_ver) >= 4 && strncmp(xenver[idx].xv_ver + strlen(xenver[idx].xv_ver) - 4, "-xvm", 4) == 0) xenver[idx].xv_is_xvm = 1; (void) HYPERVISOR_xen_version(XENVER_changeset, &xenver[idx].xv_chgset); (void) HYPERVISOR_xen_version(XENVER_compile_info, &xenver[idx].xv_build); /* * Capabilities are a set of space separated ascii strings * e.g. 'xen-3.1-x86_32p' or 'hvm-3.2-x86_64' */ (void) HYPERVISOR_xen_version(XENVER_capabilities, &xenver[idx].xv_caps); cmn_err(CE_CONT, "?v%lu.%lu%s chgset '%s'\n", xenver[idx].xv_major, xenver[idx].xv_minor, xenver[idx].xv_ver, xenver[idx].xv_chgset); if (idx == XENVER_BOOT_IDX) bcopy(&xenver[XENVER_BOOT_IDX], &xenver[XENVER_CURRENT_IDX], sizeof (xenver[XENVER_BOOT_IDX])); } typedef enum xen_hypervisor_check { XEN_RUN_CHECK, XEN_SUSPEND_CHECK } xen_hypervisor_check_t; /* * To run the hypervisor must be 3.0.4 or better. To suspend/resume * we need 3.0.4 or better and if it is 3.0.4. then it must be provided * by the Solaris xVM project. * Checking can be disabled for testing purposes by setting the * xen_suspend_debug variable. */ static int xen_hypervisor_supports_solaris(xen_hypervisor_check_t check) { if (xen_suspend_debug == 1) return (1); if (XENVER_CURRENT(xv_major) < 3) return (0); if (XENVER_CURRENT(xv_major) > 3) return (1); if (XENVER_CURRENT(xv_minor) > 0) return (1); if (XENVER_CURRENT(xv_revision) < 4) return (0); if (check == XEN_SUSPEND_CHECK && XENVER_CURRENT(xv_revision) == 4 && !XENVER_CURRENT(xv_is_xvm)) return (0); return (1); } /* * If the hypervisor is -xvm, or 3.1.2 or higher, we don't need the * workaround. */ static void xen_pte_workaround(void) { #if defined(__amd64) extern int pt_kern; if (XENVER_CURRENT(xv_major) != 3) return; if (XENVER_CURRENT(xv_minor) > 1) return; if (XENVER_CURRENT(xv_minor) == 1 && XENVER_CURRENT(xv_revision) > 1) return; if (XENVER_CURRENT(xv_is_xvm)) return; pt_kern = PT_USER; #endif } void xen_set_callback(void (*func)(void), uint_t type, uint_t flags) { struct callback_register cb; bzero(&cb, sizeof (cb)); #if defined(__amd64) cb.address = (ulong_t)func; #elif defined(__i386) cb.address.cs = KCS_SEL; cb.address.eip = (ulong_t)func; #endif cb.type = type; cb.flags = flags; /* * XXPV always ignore return value for NMI */ if (HYPERVISOR_callback_op(CALLBACKOP_register, &cb) != 0 && type != CALLBACKTYPE_nmi) panic("HYPERVISOR_callback_op failed"); } void xen_init_callbacks(void) { /* * register event (interrupt) handler. */ xen_set_callback(xen_callback, CALLBACKTYPE_event, 0); /* * failsafe handler. */ xen_set_callback(xen_failsafe_callback, CALLBACKTYPE_failsafe, CALLBACKF_mask_events); /* * NMI handler. */ xen_set_callback(nmiint, CALLBACKTYPE_nmi, 0); /* * system call handler * XXPV move to init_cpu_syscall? */ #if defined(__amd64) xen_set_callback(sys_syscall, CALLBACKTYPE_syscall, CALLBACKF_mask_events); #endif /* __amd64 */ } /* * cmn_err() followed by a 1/4 second delay; this gives the * logging service a chance to flush messages and helps avoid * intermixing output from prom_printf(). * XXPV: doesn't exactly help us on UP though. */ /*PRINTFLIKE2*/ void cpr_err(int ce, const char *fmt, ...) { va_list adx; va_start(adx, fmt); vcmn_err(ce, fmt, adx); va_end(adx); drv_usecwait(MICROSEC >> 2); } void xen_suspend_devices(void) { int rc; SUSPEND_DEBUG("xen_suspend_devices\n"); if ((rc = cpr_suspend_devices(ddi_root_node())) != 0) panic("failed to suspend devices: %d", rc); } void xen_resume_devices(void) { int rc; SUSPEND_DEBUG("xen_resume_devices\n"); if ((rc = cpr_resume_devices(ddi_root_node(), 0)) != 0) panic("failed to resume devices: %d", rc); } /* * The list of mfn pages is out of date. Recompute it. */ static void rebuild_mfn_list(void) { int i = 0; size_t sz; size_t off; pfn_t pfn; SUSPEND_DEBUG("rebuild_mfn_list\n"); sz = ((mfn_count * sizeof (mfn_t)) + MMU_PAGEOFFSET) & MMU_PAGEMASK; for (off = 0; off < sz; off += MMU_PAGESIZE) { size_t j = mmu_btop(off); if (((j * sizeof (mfn_t)) & MMU_PAGEOFFSET) == 0) { pfn = hat_getpfnum(kas.a_hat, (caddr_t)&mfn_list_pages[j]); mfn_list_pages_page[i++] = pfn_to_mfn(pfn); } pfn = hat_getpfnum(kas.a_hat, (caddr_t)mfn_list + off); mfn_list_pages[j] = pfn_to_mfn(pfn); } pfn = hat_getpfnum(kas.a_hat, (caddr_t)mfn_list_pages_page); HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list = pfn_to_mfn(pfn); } static void suspend_cpus(void) { int i; SUSPEND_DEBUG("suspend_cpus\n"); mp_enter_barrier(); for (i = 1; i < ncpus; i++) { if (!CPU_IN_SET(cpu_suspend_lost_set, i)) { SUSPEND_DEBUG("xen_vcpu_down %d\n", i); (void) xen_vcpu_down(i); } mach_cpucontext_reset(cpu[i]); } } static void resume_cpus(void) { int i; for (i = 1; i < ncpus; i++) { if (cpu[i] == NULL) continue; if (!CPU_IN_SET(cpu_suspend_lost_set, i)) { SUSPEND_DEBUG("xen_vcpu_up %d\n", i); mach_cpucontext_restore(cpu[i]); (void) xen_vcpu_up(i); } } mp_leave_barrier(); } /* * Top level routine to direct suspend/resume of a domain. */ void xen_suspend_domain(void) { extern void rtcsync(void); extern hrtime_t hres_last_tick; mfn_t start_info_mfn; ulong_t flags; pfn_t pfn; int i; /* * Check that we are happy to suspend on this hypervisor. */ if (xen_hypervisor_supports_solaris(XEN_SUSPEND_CHECK) == 0) { cpr_err(CE_WARN, "Cannot suspend on this hypervisor " "version: v%lu.%lu%s, need at least version v3.0.4 or " "-xvm based hypervisor", XENVER_CURRENT(xv_major), XENVER_CURRENT(xv_minor), XENVER_CURRENT(xv_ver)); return; } /* * XXPV - Are we definitely OK to suspend by the time we've connected * the handler? */ cpr_err(CE_NOTE, "Domain suspending for save/migrate"); SUSPEND_DEBUG("xen_suspend_domain\n"); /* * suspend interrupts and devices * XXPV - we use suspend/resume for both save/restore domains (like sun * cpr) and for migration. Would be nice to know the difference if * possible. For save/restore where down time may be a long time, we * may want to do more of the things that cpr does. (i.e. notify user * processes, shrink memory footprint for faster restore, etc.) */ xen_suspend_devices(); SUSPEND_DEBUG("xenbus_suspend\n"); xenbus_suspend(); pfn = hat_getpfnum(kas.a_hat, (caddr_t)xen_info); start_info_mfn = pfn_to_mfn(pfn); /* * XXPV: cpu hotplug can hold this under a xenbus watch. Are we safe * wrt xenbus being suspended here? */ mutex_enter(&cpu_lock); /* * Suspend must be done on vcpu 0, as no context for other CPUs is * saved. * * XXPV - add to taskq API ? */ thread_affinity_set(curthread, 0); kpreempt_disable(); SUSPEND_DEBUG("xen_start_migrate\n"); xen_start_migrate(); if (ncpus > 1) suspend_cpus(); /* * We can grab the ec_lock as it's a spinlock with a high SPL. Hence * any holder would have dropped it to get through suspend_cpus(). */ mutex_enter(&ec_lock); /* * From here on in, we can't take locks. */ SUSPEND_DEBUG("ec_suspend\n"); ec_suspend(); SUSPEND_DEBUG("gnttab_suspend\n"); gnttab_suspend(); flags = intr_clear(); xpv_time_suspend(); /* * Currently, the hypervisor incorrectly fails to bring back * powered-down VCPUs. Thus we need to record any powered-down VCPUs * to prevent any attempts to operate on them. But we have to do this * *after* the very first time we do ec_suspend(). */ for (i = 1; i < ncpus; i++) { if (cpu[i] == NULL) continue; if (cpu_get_state(cpu[i]) == P_POWEROFF) CPUSET_ATOMIC_ADD(cpu_suspend_lost_set, i); } /* * The dom0 save/migrate code doesn't automatically translate * these into PFNs, but expects them to be, so we do it here. * We don't use mfn_to_pfn() because so many OS services have * been disabled at this point. */ xen_info->store_mfn = mfn_to_pfn_mapping[xen_info->store_mfn]; xen_info->console.domU.mfn = mfn_to_pfn_mapping[xen_info->console.domU.mfn]; if (CPU->cpu_m.mcpu_vcpu_info->evtchn_upcall_mask == 0) { prom_printf("xen_suspend_domain(): " "CPU->cpu_m.mcpu_vcpu_info->evtchn_upcall_mask not set\n"); (void) HYPERVISOR_shutdown(SHUTDOWN_crash); } if (HYPERVISOR_update_va_mapping((uintptr_t)HYPERVISOR_shared_info, 0, UVMF_INVLPG)) { prom_printf("xen_suspend_domain(): " "HYPERVISOR_update_va_mapping() failed\n"); (void) HYPERVISOR_shutdown(SHUTDOWN_crash); } SUSPEND_DEBUG("HYPERVISOR_suspend\n"); /* * At this point we suspend and sometime later resume. */ if (HYPERVISOR_suspend(start_info_mfn)) { prom_printf("xen_suspend_domain(): " "HYPERVISOR_suspend() failed\n"); (void) HYPERVISOR_shutdown(SHUTDOWN_crash); } /* * Point HYPERVISOR_shared_info to its new value. */ if (HYPERVISOR_update_va_mapping((uintptr_t)HYPERVISOR_shared_info, xen_info->shared_info | PT_NOCONSIST | PT_VALID | PT_WRITABLE, UVMF_INVLPG)) (void) HYPERVISOR_shutdown(SHUTDOWN_crash); if (xen_info->nr_pages != mfn_count) { prom_printf("xen_suspend_domain(): number of pages" " changed, was 0x%lx, now 0x%lx\n", mfn_count, xen_info->nr_pages); (void) HYPERVISOR_shutdown(SHUTDOWN_crash); } xpv_time_resume(); cached_max_mfn = 0; SUSPEND_DEBUG("gnttab_resume\n"); gnttab_resume(); /* XXPV: add a note that this must be lockless. */ SUSPEND_DEBUG("ec_resume\n"); ec_resume(); intr_restore(flags); if (ncpus > 1) resume_cpus(); mutex_exit(&ec_lock); xen_end_migrate(); mutex_exit(&cpu_lock); /* * Now we can take locks again. */ /* * Force the tick value used for tv_nsec in hres_tick() to be up to * date. rtcsync() will reset the hrestime value appropriately. */ hres_last_tick = xpv_gethrtime(); /* * XXPV: we need to have resumed the CPUs since this takes locks, but * can remote CPUs see bad state? Presumably yes. Should probably nest * taking of todlock inside of cpu_lock, or vice versa, then provide an * unlocked version. Probably need to call clkinitf to reset cpu freq * and re-calibrate if we migrated to a different speed cpu. Also need * to make a (re)init_cpu_info call to update processor info structs * and device tree info. That remains to be written at the moment. */ rtcsync(); rebuild_mfn_list(); SUSPEND_DEBUG("xenbus_resume\n"); xenbus_resume(); SUSPEND_DEBUG("xenbus_resume_devices\n"); xen_resume_devices(); thread_affinity_clear(curthread); kpreempt_enable(); SUSPEND_DEBUG("finished xen_suspend_domain\n"); /* * We have restarted our suspended domain, update the hypervisor * details. NB: This must be done at the end of this function, * since we need the domain to be completely resumed before * these functions will work correctly. */ xen_set_version(XENVER_CURRENT_IDX); /* * We can check and report a warning, but we don't stop the * process. */ if (xen_hypervisor_supports_solaris(XEN_SUSPEND_CHECK) == 0) cmn_err(CE_WARN, "Found hypervisor version: v%lu.%lu%s " "but need at least version v3.0.4", XENVER_CURRENT(xv_major), XENVER_CURRENT(xv_minor), XENVER_CURRENT(xv_ver)); cmn_err(CE_NOTE, "domain restore/migrate completed"); } /*ARGSUSED*/ int xen_debug_handler(void *arg) { debug_enter("External debug event received"); /* * If we've not got KMDB loaded, output some stuff difficult to capture * from a domain core. */ if (!(boothowto & RB_DEBUG)) { shared_info_t *si = HYPERVISOR_shared_info; int i; prom_printf("evtchn_pending [ "); for (i = 0; i < 8; i++) prom_printf("%lx ", si->evtchn_pending[i]); prom_printf("]\nevtchn_mask [ "); for (i = 0; i < 8; i++) prom_printf("%lx ", si->evtchn_mask[i]); prom_printf("]\n"); for (i = 0; i < ncpus; i++) { vcpu_info_t *vcpu = &si->vcpu_info[i]; if (cpu[i] == NULL) continue; prom_printf("CPU%d pending %d mask %d sel %lx\n", i, vcpu->evtchn_upcall_pending, vcpu->evtchn_upcall_mask, vcpu->evtchn_pending_sel); } } return (0); } /*ARGSUSED*/ static void xen_sysrq_handler(struct xenbus_watch *watch, const char **vec, unsigned int len) { xenbus_transaction_t xbt; char key = '\0'; int ret; retry: if (xenbus_transaction_start(&xbt)) { cmn_err(CE_WARN, "failed to start sysrq transaction"); return; } if ((ret = xenbus_scanf(xbt, "control", "sysrq", "%c", &key)) != 0) { /* * ENOENT happens in response to our own xenbus_rm. * XXPV - this happens spuriously on boot? */ if (ret != ENOENT) cmn_err(CE_WARN, "failed to read sysrq: %d", ret); goto out; } if ((ret = xenbus_rm(xbt, "control", "sysrq")) != 0) { cmn_err(CE_WARN, "failed to reset sysrq: %d", ret); goto out; } if (xenbus_transaction_end(xbt, 0) == EAGAIN) goto retry; /* * Somewhat arbitrary - on Linux this means 'reboot'. We could just * accept any key, but this might increase the risk of sending a * harmless sysrq to the wrong domain... */ if (key == 'b') (void) xen_debug_handler(NULL); else cmn_err(CE_WARN, "Ignored sysrq %c", key); return; out: (void) xenbus_transaction_end(xbt, 1); } taskq_t *xen_shutdown_tq; #define SHUTDOWN_INVALID -1 #define SHUTDOWN_POWEROFF 0 #define SHUTDOWN_REBOOT 1 #define SHUTDOWN_SUSPEND 2 #define SHUTDOWN_HALT 3 #define SHUTDOWN_MAX 4 #define SHUTDOWN_TIMEOUT_SECS (60 * 5) static const char *cmd_strings[SHUTDOWN_MAX] = { "poweroff", "reboot", "suspend", "halt" }; static void xen_dirty_shutdown(void *arg) { int cmd = (uintptr_t)arg; cmn_err(CE_WARN, "Externally requested shutdown failed or " "timed out.\nShutting down.\n"); switch (cmd) { case SHUTDOWN_HALT: case SHUTDOWN_POWEROFF: (void) kadmin(A_SHUTDOWN, AD_POWEROFF, NULL, kcred); break; case SHUTDOWN_REBOOT: (void) kadmin(A_REBOOT, AD_BOOT, NULL, kcred); break; } } static void xen_shutdown(void *arg) { int cmd = (uintptr_t)arg; proc_t *initpp; ASSERT(cmd > SHUTDOWN_INVALID && cmd < SHUTDOWN_MAX); if (cmd == SHUTDOWN_SUSPEND) { xen_suspend_domain(); return; } switch (cmd) { case SHUTDOWN_POWEROFF: force_shutdown_method = AD_POWEROFF; break; case SHUTDOWN_HALT: force_shutdown_method = AD_HALT; break; case SHUTDOWN_REBOOT: force_shutdown_method = AD_BOOT; break; } /* * If we're still booting and init(1) isn't set up yet, simply halt. */ mutex_enter(&pidlock); initpp = prfind(P_INITPID); mutex_exit(&pidlock); if (initpp == NULL) { extern void halt(char *); halt("Power off the System"); /* just in case */ } /* * else, graceful shutdown with inittab and all getting involved */ psignal(initpp, SIGPWR); (void) timeout(xen_dirty_shutdown, arg, SHUTDOWN_TIMEOUT_SECS * drv_usectohz(MICROSEC)); } /*ARGSUSED*/ static void xen_shutdown_handler(struct xenbus_watch *watch, const char **vec, unsigned int len) { char *str; xenbus_transaction_t xbt; int err, shutdown_code = SHUTDOWN_INVALID; unsigned int slen; again: err = xenbus_transaction_start(&xbt); if (err) return; if (xenbus_read(xbt, "control", "shutdown", (void *)&str, &slen)) { (void) xenbus_transaction_end(xbt, 1); return; } SUSPEND_DEBUG("%d: xen_shutdown_handler: \"%s\"\n", CPU->cpu_id, str); /* * If this is a watch fired from our write below, check out early to * avoid an infinite loop. */ if (strcmp(str, "") == 0) { (void) xenbus_transaction_end(xbt, 0); kmem_free(str, slen); return; } else if (strcmp(str, "poweroff") == 0) { shutdown_code = SHUTDOWN_POWEROFF; } else if (strcmp(str, "reboot") == 0) { shutdown_code = SHUTDOWN_REBOOT; } else if (strcmp(str, "suspend") == 0) { shutdown_code = SHUTDOWN_SUSPEND; } else if (strcmp(str, "halt") == 0) { shutdown_code = SHUTDOWN_HALT; } else { printf("Ignoring shutdown request: %s\n", str); } /* * XXPV Should we check the value of xenbus_write() too, or are all * errors automatically folded into xenbus_transaction_end() ?? */ (void) xenbus_write(xbt, "control", "shutdown", ""); err = xenbus_transaction_end(xbt, 0); if (err == EAGAIN) { SUSPEND_DEBUG("%d: trying again\n", CPU->cpu_id); kmem_free(str, slen); goto again; } kmem_free(str, slen); if (shutdown_code != SHUTDOWN_INVALID) { (void) taskq_dispatch(xen_shutdown_tq, xen_shutdown, (void *)(intptr_t)shutdown_code, 0); } } static struct xenbus_watch shutdown_watch; static struct xenbus_watch sysrq_watch; void xen_late_startup(void) { if (!DOMAIN_IS_INITDOMAIN(xen_info)) { xen_shutdown_tq = taskq_create("shutdown_taskq", 1, maxclsyspri - 1, 1, 1, TASKQ_PREPOPULATE); shutdown_watch.node = "control/shutdown"; shutdown_watch.callback = xen_shutdown_handler; if (register_xenbus_watch(&shutdown_watch)) cmn_err(CE_WARN, "Failed to set shutdown watcher"); sysrq_watch.node = "control/sysrq"; sysrq_watch.callback = xen_sysrq_handler; if (register_xenbus_watch(&sysrq_watch)) cmn_err(CE_WARN, "Failed to set sysrq watcher"); } balloon_init(xen_info->nr_pages); } #ifdef DEBUG #define XEN_PRINTF_BUFSIZE 1024 char xen_printf_buffer[XEN_PRINTF_BUFSIZE]; /* * Printf function that calls hypervisor directly. For DomU it only * works when running on a xen hypervisor built with debug on. Works * always since no I/O ring interaction is needed. */ /*PRINTFLIKE1*/ void xen_printf(const char *fmt, ...) { va_list ap; va_start(ap, fmt); (void) vsnprintf(xen_printf_buffer, XEN_PRINTF_BUFSIZE, fmt, ap); va_end(ap); (void) HYPERVISOR_console_io(CONSOLEIO_write, strlen(xen_printf_buffer), xen_printf_buffer); } #else void xen_printf(const char *fmt, ...) { } #endif /* DEBUG */ void startup_xen_version(void) { xen_set_version(XENVER_BOOT_IDX); if (xen_hypervisor_supports_solaris(XEN_RUN_CHECK) == 0) cmn_err(CE_WARN, "Found hypervisor version: v%lu.%lu%s " "but need at least version v3.0.4", XENVER_CURRENT(xv_major), XENVER_CURRENT(xv_minor), XENVER_CURRENT(xv_ver)); xen_pte_workaround(); } /* * Miscellaneous hypercall wrappers with slightly more verbose diagnostics. */ void xen_set_gdt(ulong_t *frame_list, int entries) { int err; if ((err = HYPERVISOR_set_gdt(frame_list, entries)) != 0) { /* * X_EINVAL: reserved entry or bad frames * X_EFAULT: bad address */ panic("xen_set_gdt(%p, %d): error %d", (void *)frame_list, entries, -(int)err); } } void xen_set_ldt(user_desc_t *ldt, uint_t nsels) { struct mmuext_op op; long err; op.cmd = MMUEXT_SET_LDT; op.arg1.linear_addr = (uintptr_t)ldt; op.arg2.nr_ents = nsels; if ((err = HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF)) != 0) { panic("xen_set_ldt(%p, %d): error %d", (void *)ldt, nsels, -(int)err); } } void xen_stack_switch(ulong_t ss, ulong_t esp) { long err; if ((err = HYPERVISOR_stack_switch(ss, esp)) != 0) { /* * X_EPERM: bad selector */ panic("xen_stack_switch(%lx, %lx): error %d", ss, esp, -(int)err); } } long xen_set_trap_table(trap_info_t *table) { long err; if ((err = HYPERVISOR_set_trap_table(table)) != 0) { /* * X_EFAULT: bad address * X_EPERM: bad selector */ panic("xen_set_trap_table(%p): error %d", (void *)table, -(int)err); } return (err); } #if defined(__amd64) void xen_set_segment_base(int reg, ulong_t value) { long err; if ((err = HYPERVISOR_set_segment_base(reg, value)) != 0) { /* * X_EFAULT: bad address * X_EINVAL: bad type */ panic("xen_set_segment_base(%d, %lx): error %d", reg, value, -(int)err); } } #endif /* __amd64 */ /* * Translate a hypervisor errcode to a Solaris error code. */ int xen_xlate_errcode(int error) { switch (-error) { /* * Translate hypervisor errno's into native errno's */ #define CASE(num) case X_##num: error = num; break CASE(EPERM); CASE(ENOENT); CASE(ESRCH); CASE(EINTR); CASE(EIO); CASE(ENXIO); CASE(E2BIG); CASE(ENOMEM); CASE(EACCES); CASE(EFAULT); CASE(EBUSY); CASE(EEXIST); CASE(ENODEV); CASE(EISDIR); CASE(EINVAL); CASE(ENOSPC); CASE(ESPIPE); CASE(EROFS); CASE(ENOSYS); CASE(ENOTEMPTY); CASE(EISCONN); CASE(ENODATA); #undef CASE default: panic("xen_xlate_errcode: unknown error %d", error); } return (error); } /* * Raise PS_IOPL on current vcpu to user level. * Caller responsible for preventing kernel preemption. */ void xen_enable_user_iopl(void) { physdev_set_iopl_t set_iopl; set_iopl.iopl = 3; /* user ring 3 */ (void) HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl); } /* * Drop PS_IOPL on current vcpu to kernel level */ void xen_disable_user_iopl(void) { physdev_set_iopl_t set_iopl; set_iopl.iopl = 1; /* kernel pseudo ring 1 */ (void) HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl); } int xen_gdt_setprot(cpu_t *cp, uint_t prot) { int err; #if defined(__amd64) int pt_bits = PT_VALID; if (prot & PROT_WRITE) pt_bits |= PT_WRITABLE; #endif if ((err = as_setprot(&kas, (caddr_t)cp->cpu_gdt, MMU_PAGESIZE, prot)) != 0) goto done; #if defined(__amd64) err = xen_kpm_page(mmu_btop(cp->cpu_m.mcpu_gdtpa), pt_bits); #endif done: if (err) { cmn_err(CE_WARN, "cpu%d: xen_gdt_setprot(%s) failed: error %d", cp->cpu_id, (prot & PROT_WRITE) ? "writable" : "read-only", err); } return (err); } int xen_ldt_setprot(user_desc_t *ldt, size_t lsize, uint_t prot) { int err; caddr_t lva = (caddr_t)ldt; #if defined(__amd64) int pt_bits = PT_VALID; pgcnt_t npgs; if (prot & PROT_WRITE) pt_bits |= PT_WRITABLE; #endif /* __amd64 */ if ((err = as_setprot(&kas, (caddr_t)ldt, lsize, prot)) != 0) goto done; #if defined(__amd64) ASSERT(IS_P2ALIGNED(lsize, PAGESIZE)); npgs = mmu_btop(lsize); while (npgs--) { if ((err = xen_kpm_page(hat_getpfnum(kas.a_hat, lva), pt_bits)) != 0) break; lva += PAGESIZE; } #endif /* __amd64 */ done: if (err) { cmn_err(CE_WARN, "xen_ldt_setprot(%p, %s) failed: error %d", (void *)lva, (prot & PROT_WRITE) ? "writable" : "read-only", err); } return (err); }