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freebsd-skq/sys/x86/xen/xen_apic.c
John Baldwin fae9277339 Fix build with SMP disabled. 
CR:		https://phabric.freebsd.org/D407
Reviewed by:	royger
2014-07-15 15:40:33 +00:00

551 lines
11 KiB
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/*
* Copyright (c) 2014 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/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/smp.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/cpufunc.h>
#include <machine/cpu.h>
#include <machine/intr_machdep.h>
#include <machine/smp.h>
#include <x86/apicreg.h>
#include <x86/apicvar.h>
#include <xen/xen-os.h>
#include <xen/features.h>
#include <xen/gnttab.h>
#include <xen/hypervisor.h>
#include <xen/hvm.h>
#include <xen/xen_intr.h>
#include <xen/interface/vcpu.h>
/*--------------------------------- Macros -----------------------------------*/
#define XEN_APIC_UNSUPPORTED \
panic("%s: not available in Xen PV port.", __func__)
/*--------------------------- Forward Declarations ---------------------------*/
#ifdef SMP
static driver_filter_t xen_smp_rendezvous_action;
static driver_filter_t xen_invltlb;
static driver_filter_t xen_invlpg;
static driver_filter_t xen_invlrng;
static driver_filter_t xen_invlcache;
#ifdef __i386__
static driver_filter_t xen_lazypmap;
#endif
static driver_filter_t xen_ipi_bitmap_handler;
static driver_filter_t xen_cpustop_handler;
static driver_filter_t xen_cpususpend_handler;
static driver_filter_t xen_cpustophard_handler;
#endif
/*---------------------------- Extern Declarations ---------------------------*/
/* Variables used by mp_machdep to perform the MMU related IPIs */
#ifdef __i386__
extern void pmap_lazyfix_action(void);
#endif
#ifdef __amd64__
extern int pmap_pcid_enabled;
#endif
/*---------------------------------- Macros ----------------------------------*/
#define IPI_TO_IDX(ipi) ((ipi) - APIC_IPI_INTS)
/*--------------------------------- Xen IPIs ---------------------------------*/
#ifdef SMP
struct xen_ipi_handler
{
driver_filter_t *filter;
const char *description;
};
static struct xen_ipi_handler xen_ipis[] =
{
[IPI_TO_IDX(IPI_RENDEZVOUS)] = { xen_smp_rendezvous_action, "r" },
[IPI_TO_IDX(IPI_INVLTLB)] = { xen_invltlb, "itlb"},
[IPI_TO_IDX(IPI_INVLPG)] = { xen_invlpg, "ipg" },
[IPI_TO_IDX(IPI_INVLRNG)] = { xen_invlrng, "irg" },
[IPI_TO_IDX(IPI_INVLCACHE)] = { xen_invlcache, "ic" },
#ifdef __i386__
[IPI_TO_IDX(IPI_LAZYPMAP)] = { xen_lazypmap, "lp" },
#endif
[IPI_TO_IDX(IPI_BITMAP_VECTOR)] = { xen_ipi_bitmap_handler, "b" },
[IPI_TO_IDX(IPI_STOP)] = { xen_cpustop_handler, "st" },
[IPI_TO_IDX(IPI_SUSPEND)] = { xen_cpususpend_handler, "sp" },
[IPI_TO_IDX(IPI_STOP_HARD)] = { xen_cpustophard_handler, "sth" },
};
#endif
/*------------------------------- Per-CPU Data -------------------------------*/
#ifdef SMP
DPCPU_DEFINE(xen_intr_handle_t, ipi_handle[nitems(xen_ipis)]);
#endif
/*------------------------------- Xen PV APIC --------------------------------*/
static void
xen_pv_lapic_create(u_int apic_id, int boot_cpu)
{
#ifdef SMP
cpu_add(apic_id, boot_cpu);
#endif
}
static void
xen_pv_lapic_init(vm_paddr_t addr)
{
}
static void
xen_pv_lapic_setup(int boot)
{
}
static void
xen_pv_lapic_dump(const char *str)
{
printf("cpu%d %s XEN PV LAPIC\n", PCPU_GET(cpuid), str);
}
static void
xen_pv_lapic_disable(void)
{
}
static void
xen_pv_lapic_eoi(void)
{
XEN_APIC_UNSUPPORTED;
}
static int
xen_pv_lapic_id(void)
{
return (PCPU_GET(apic_id));
}
static int
xen_pv_lapic_intr_pending(u_int vector)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static u_int
xen_pv_apic_cpuid(u_int apic_id)
{
#ifdef SMP
return (apic_cpuids[apic_id]);
#else
return (0);
#endif
}
static u_int
xen_pv_apic_alloc_vector(u_int apic_id, u_int irq)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static u_int
xen_pv_apic_alloc_vectors(u_int apic_id, u_int *irqs, u_int count, u_int align)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static void
xen_pv_apic_disable_vector(u_int apic_id, u_int vector)
{
XEN_APIC_UNSUPPORTED;
}
static void
xen_pv_apic_enable_vector(u_int apic_id, u_int vector)
{
XEN_APIC_UNSUPPORTED;
}
static void
xen_pv_apic_free_vector(u_int apic_id, u_int vector, u_int irq)
{
XEN_APIC_UNSUPPORTED;
}
static void
xen_pv_lapic_set_logical_id(u_int apic_id, u_int cluster, u_int cluster_id)
{
XEN_APIC_UNSUPPORTED;
}
static int
xen_pv_lapic_enable_pmc(void)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static void
xen_pv_lapic_disable_pmc(void)
{
XEN_APIC_UNSUPPORTED;
}
static void
xen_pv_lapic_reenable_pmc(void)
{
XEN_APIC_UNSUPPORTED;
}
static void
xen_pv_lapic_enable_cmc(void)
{
}
#ifdef SMP
static void
xen_pv_lapic_ipi_raw(register_t icrlo, u_int dest)
{
XEN_APIC_UNSUPPORTED;
}
static void
xen_pv_lapic_ipi_vectored(u_int vector, int dest)
{
xen_intr_handle_t *ipi_handle;
int ipi_idx, to_cpu, self;
ipi_idx = IPI_TO_IDX(vector);
if (ipi_idx >= nitems(xen_ipis))
panic("IPI out of range");
switch(dest) {
case APIC_IPI_DEST_SELF:
ipi_handle = DPCPU_GET(ipi_handle);
xen_intr_signal(ipi_handle[ipi_idx]);
break;
case APIC_IPI_DEST_ALL:
CPU_FOREACH(to_cpu) {
ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle);
xen_intr_signal(ipi_handle[ipi_idx]);
}
break;
case APIC_IPI_DEST_OTHERS:
self = PCPU_GET(cpuid);
CPU_FOREACH(to_cpu) {
if (to_cpu != self) {
ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle);
xen_intr_signal(ipi_handle[ipi_idx]);
}
}
break;
default:
to_cpu = apic_cpuid(dest);
ipi_handle = DPCPU_ID_GET(to_cpu, ipi_handle);
xen_intr_signal(ipi_handle[ipi_idx]);
break;
}
}
static int
xen_pv_lapic_ipi_wait(int delay)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
#endif
static int
xen_pv_lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static int
xen_pv_lapic_set_lvt_mode(u_int apic_id, u_int lvt, uint32_t mode)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static int
xen_pv_lapic_set_lvt_polarity(u_int apic_id, u_int lvt, enum intr_polarity pol)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
static int
xen_pv_lapic_set_lvt_triggermode(u_int apic_id, u_int lvt,
enum intr_trigger trigger)
{
XEN_APIC_UNSUPPORTED;
return (0);
}
/* Xen apic_ops implementation */
struct apic_ops xen_apic_ops = {
.create = xen_pv_lapic_create,
.init = xen_pv_lapic_init,
.setup = xen_pv_lapic_setup,
.dump = xen_pv_lapic_dump,
.disable = xen_pv_lapic_disable,
.eoi = xen_pv_lapic_eoi,
.id = xen_pv_lapic_id,
.intr_pending = xen_pv_lapic_intr_pending,
.set_logical_id = xen_pv_lapic_set_logical_id,
.cpuid = xen_pv_apic_cpuid,
.alloc_vector = xen_pv_apic_alloc_vector,
.alloc_vectors = xen_pv_apic_alloc_vectors,
.enable_vector = xen_pv_apic_enable_vector,
.disable_vector = xen_pv_apic_disable_vector,
.free_vector = xen_pv_apic_free_vector,
.enable_pmc = xen_pv_lapic_enable_pmc,
.disable_pmc = xen_pv_lapic_disable_pmc,
.reenable_pmc = xen_pv_lapic_reenable_pmc,
.enable_cmc = xen_pv_lapic_enable_cmc,
#ifdef SMP
.ipi_raw = xen_pv_lapic_ipi_raw,
.ipi_vectored = xen_pv_lapic_ipi_vectored,
.ipi_wait = xen_pv_lapic_ipi_wait,
#endif
.set_lvt_mask = xen_pv_lapic_set_lvt_mask,
.set_lvt_mode = xen_pv_lapic_set_lvt_mode,
.set_lvt_polarity = xen_pv_lapic_set_lvt_polarity,
.set_lvt_triggermode = xen_pv_lapic_set_lvt_triggermode,
};
#ifdef SMP
/*---------------------------- XEN PV IPI Handlers ---------------------------*/
/*
* These are C clones of the ASM functions found in apic_vector.
*/
static int
xen_ipi_bitmap_handler(void *arg)
{
struct trapframe *frame;
frame = arg;
ipi_bitmap_handler(*frame);
return (FILTER_HANDLED);
}
static int
xen_smp_rendezvous_action(void *arg)
{
#ifdef COUNT_IPIS
(*ipi_rendezvous_counts[PCPU_GET(cpuid)])++;
#endif /* COUNT_IPIS */
smp_rendezvous_action();
return (FILTER_HANDLED);
}
static int
xen_invltlb(void *arg)
{
invltlb_handler();
return (FILTER_HANDLED);
}
#ifdef __amd64__
static int
xen_invltlb_pcid(void *arg)
{
invltlb_pcid_handler();
return (FILTER_HANDLED);
}
#endif
static int
xen_invlpg(void *arg)
{
invlpg_handler();
return (FILTER_HANDLED);
}
#ifdef __amd64__
static int
xen_invlpg_pcid(void *arg)
{
invlpg_pcid_handler();
return (FILTER_HANDLED);
}
#endif
static int
xen_invlrng(void *arg)
{
invlrng_handler();
return (FILTER_HANDLED);
}
static int
xen_invlcache(void *arg)
{
invlcache_handler();
return (FILTER_HANDLED);
}
#ifdef __i386__
static int
xen_lazypmap(void *arg)
{
pmap_lazyfix_action();
return (FILTER_HANDLED);
}
#endif
static int
xen_cpustop_handler(void *arg)
{
cpustop_handler();
return (FILTER_HANDLED);
}
static int
xen_cpususpend_handler(void *arg)
{
cpususpend_handler();
return (FILTER_HANDLED);
}
static int
xen_cpustophard_handler(void *arg)
{
ipi_nmi_handler();
return (FILTER_HANDLED);
}
/*----------------------------- XEN PV IPI setup -----------------------------*/
/*
* Those functions are provided outside of the Xen PV APIC implementation
* so PVHVM guests can also use PV IPIs without having an actual Xen PV APIC,
* because on PVHVM there's an emulated LAPIC provided by Xen.
*/
static void
xen_cpu_ipi_init(int cpu)
{
xen_intr_handle_t *ipi_handle;
const struct xen_ipi_handler *ipi;
device_t dev;
int idx, rc;
ipi_handle = DPCPU_ID_GET(cpu, ipi_handle);
dev = pcpu_find(cpu)->pc_device;
KASSERT((dev != NULL), ("NULL pcpu device_t"));
for (ipi = xen_ipis, idx = 0; idx < nitems(xen_ipis); ipi++, idx++) {
if (ipi->filter == NULL) {
ipi_handle[idx] = NULL;
continue;
}
rc = xen_intr_alloc_and_bind_ipi(dev, cpu, ipi->filter,
INTR_TYPE_TTY, &ipi_handle[idx]);
if (rc != 0)
panic("Unable to allocate a XEN IPI port");
xen_intr_describe(ipi_handle[idx], "%s", ipi->description);
}
}
static void
xen_setup_cpus(void)
{
int i;
if (!xen_vector_callback_enabled)
return;
#ifdef __amd64__
if (pmap_pcid_enabled) {
xen_ipis[IPI_TO_IDX(IPI_INVLTLB)].filter = xen_invltlb_pcid;
xen_ipis[IPI_TO_IDX(IPI_INVLPG)].filter = xen_invlpg_pcid;
}
#endif
CPU_FOREACH(i)
xen_cpu_ipi_init(i);
/* Set the xen pv ipi ops to replace the native ones */
if (xen_hvm_domain())
apic_ops.ipi_vectored = xen_pv_lapic_ipi_vectored;
}
/* We need to setup IPIs before APs are started */
SYSINIT(xen_setup_cpus, SI_SUB_SMP-1, SI_ORDER_FIRST, xen_setup_cpus, NULL);
#endif /* SMP */
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