diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/conf/files.amd64 | 1 | ||||
| -rw-r--r-- | sys/x86/xen/pvcpu_enum.c | 134 |
2 files changed, 135 insertions, 0 deletions
diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64 index 45c092730019..c493a311ff7c 100644 --- a/sys/conf/files.amd64 +++ b/sys/conf/files.amd64 @@ -558,3 +558,4 @@ x86/x86/delay.c standard x86/xen/hvm.c optional xenhvm x86/xen/xen_intr.c optional xen | xenhvm x86/xen/pv.c optional xenhvm +x86/xen/pvcpu_enum.c optional xenhvm diff --git a/sys/x86/xen/pvcpu_enum.c b/sys/x86/xen/pvcpu_enum.c new file mode 100644 index 000000000000..df092cb8c523 --- /dev/null +++ b/sys/x86/xen/pvcpu_enum.c @@ -0,0 +1,134 @@ +/*- + * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> + * Copyright (c) 2013 Roger Pau Monné <roger.pau@citrix.com> + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/smp.h> +#include <sys/pcpu.h> +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <machine/intr_machdep.h> +#include <x86/apicvar.h> + +#include <machine/cpu.h> +#include <machine/smp.h> + +#include <xen/xen-os.h> +#include <xen/hypervisor.h> + +#include <xen/interface/vcpu.h> + +static int xenpv_probe(void); +static int xenpv_probe_cpus(void); +static int xenpv_setup_local(void); +static int xenpv_setup_io(void); + +static struct apic_enumerator xenpv_enumerator = { + "Xen PV", + xenpv_probe, + xenpv_probe_cpus, + xenpv_setup_local, + xenpv_setup_io +}; + +/* + * This enumerator will only be registered on PVH + */ +static int +xenpv_probe(void) +{ + return (-100); +} + +/* + * Test each possible vCPU in order to find the number of vCPUs + */ +static int +xenpv_probe_cpus(void) +{ +#ifdef SMP + int i, ret; + + for (i = 0; i < MAXCPU; i++) { + ret = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL); + if (ret >= 0) + lapic_create((i * 2), (i == 0)); + } +#endif + return (0); +} + +/* + * Initialize the vCPU id of the BSP + */ +static int +xenpv_setup_local(void) +{ + PCPU_SET(vcpu_id, 0); + lapic_init(0); + return (0); +} + +/* + * On PVH guests there's no IO APIC + */ +static int +xenpv_setup_io(void) +{ + return (0); +} + +static void +xenpv_register(void *dummy __unused) +{ + if (xen_pv_domain()) { + apic_register_enumerator(&xenpv_enumerator); + } +} +SYSINIT(xenpv_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, xenpv_register, NULL); + +/* + * Setup per-CPU vCPU IDs + */ +static void +xenpv_set_ids(void *dummy) +{ + struct pcpu *pc; + int i; + + CPU_FOREACH(i) { + pc = pcpu_find(i); + pc->pc_vcpu_id = i; + } +} +SYSINIT(xenpv_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, xenpv_set_ids, NULL); |