312 lines
7.9 KiB
C
312 lines
7.9 KiB
C
#include <xen/xen.h>
|
|
#include <xen/events.h>
|
|
#include <xen/grant_table.h>
|
|
#include <xen/hvm.h>
|
|
#include <xen/interface/vcpu.h>
|
|
#include <xen/interface/xen.h>
|
|
#include <xen/interface/memory.h>
|
|
#include <xen/interface/hvm/params.h>
|
|
#include <xen/features.h>
|
|
#include <xen/platform_pci.h>
|
|
#include <xen/xenbus.h>
|
|
#include <xen/page.h>
|
|
#include <xen/interface/sched.h>
|
|
#include <xen/xen-ops.h>
|
|
#include <asm/xen/hypervisor.h>
|
|
#include <asm/xen/hypercall.h>
|
|
#include <asm/system_misc.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/cpuidle.h>
|
|
#include <linux/cpufreq.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/console.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
struct start_info _xen_start_info;
|
|
struct start_info *xen_start_info = &_xen_start_info;
|
|
EXPORT_SYMBOL(xen_start_info);
|
|
|
|
enum xen_domain_type xen_domain_type = XEN_NATIVE;
|
|
EXPORT_SYMBOL(xen_domain_type);
|
|
|
|
struct shared_info xen_dummy_shared_info;
|
|
struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info;
|
|
|
|
DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
|
|
static struct vcpu_info __percpu *xen_vcpu_info;
|
|
|
|
/* These are unused until we support booting "pre-ballooned" */
|
|
unsigned long xen_released_pages;
|
|
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
|
|
|
|
static __read_mostly unsigned int xen_events_irq;
|
|
|
|
static __initdata struct device_node *xen_node;
|
|
|
|
int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t *gfn, int nr,
|
|
int *err_ptr, pgprot_t prot,
|
|
unsigned domid,
|
|
struct page **pages)
|
|
{
|
|
return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
|
|
prot, domid, pages);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_array);
|
|
|
|
/* Not used by XENFEAT_auto_translated guests. */
|
|
int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t gfn, int nr,
|
|
pgprot_t prot, unsigned domid,
|
|
struct page **pages)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_range);
|
|
|
|
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
|
|
int nr, struct page **pages)
|
|
{
|
|
return xen_xlate_unmap_gfn_range(vma, nr, pages);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);
|
|
|
|
static void xen_percpu_init(void)
|
|
{
|
|
struct vcpu_register_vcpu_info info;
|
|
struct vcpu_info *vcpup;
|
|
int err;
|
|
int cpu = get_cpu();
|
|
|
|
/*
|
|
* VCPUOP_register_vcpu_info cannot be called twice for the same
|
|
* vcpu, so if vcpu_info is already registered, just get out. This
|
|
* can happen with cpu-hotplug.
|
|
*/
|
|
if (per_cpu(xen_vcpu, cpu) != NULL)
|
|
goto after_register_vcpu_info;
|
|
|
|
pr_info("Xen: initializing cpu%d\n", cpu);
|
|
vcpup = per_cpu_ptr(xen_vcpu_info, cpu);
|
|
|
|
info.mfn = virt_to_gfn(vcpup);
|
|
info.offset = xen_offset_in_page(vcpup);
|
|
|
|
err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
|
|
BUG_ON(err);
|
|
per_cpu(xen_vcpu, cpu) = vcpup;
|
|
|
|
after_register_vcpu_info:
|
|
enable_percpu_irq(xen_events_irq, 0);
|
|
put_cpu();
|
|
}
|
|
|
|
static void xen_restart(enum reboot_mode reboot_mode, const char *cmd)
|
|
{
|
|
struct sched_shutdown r = { .reason = SHUTDOWN_reboot };
|
|
int rc;
|
|
rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
|
|
BUG_ON(rc);
|
|
}
|
|
|
|
static void xen_power_off(void)
|
|
{
|
|
struct sched_shutdown r = { .reason = SHUTDOWN_poweroff };
|
|
int rc;
|
|
rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
|
|
BUG_ON(rc);
|
|
}
|
|
|
|
static int xen_cpu_notification(struct notifier_block *self,
|
|
unsigned long action,
|
|
void *hcpu)
|
|
{
|
|
switch (action) {
|
|
case CPU_STARTING:
|
|
xen_percpu_init();
|
|
break;
|
|
case CPU_DYING:
|
|
disable_percpu_irq(xen_events_irq);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block xen_cpu_notifier = {
|
|
.notifier_call = xen_cpu_notification,
|
|
};
|
|
|
|
static irqreturn_t xen_arm_callback(int irq, void *arg)
|
|
{
|
|
xen_hvm_evtchn_do_upcall();
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* see Documentation/devicetree/bindings/arm/xen.txt for the
|
|
* documentation of the Xen Device Tree format.
|
|
*/
|
|
#define GRANT_TABLE_PHYSADDR 0
|
|
void __init xen_early_init(void)
|
|
{
|
|
int len;
|
|
const char *s = NULL;
|
|
const char *version = NULL;
|
|
const char *xen_prefix = "xen,xen-";
|
|
|
|
xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
|
|
if (!xen_node) {
|
|
pr_debug("No Xen support\n");
|
|
return;
|
|
}
|
|
s = of_get_property(xen_node, "compatible", &len);
|
|
if (strlen(xen_prefix) + 3 < len &&
|
|
!strncmp(xen_prefix, s, strlen(xen_prefix)))
|
|
version = s + strlen(xen_prefix);
|
|
if (version == NULL) {
|
|
pr_debug("Xen version not found\n");
|
|
return;
|
|
}
|
|
|
|
pr_info("Xen %s support found\n", version);
|
|
|
|
xen_domain_type = XEN_HVM_DOMAIN;
|
|
|
|
xen_setup_features();
|
|
|
|
if (xen_feature(XENFEAT_dom0))
|
|
xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED;
|
|
else
|
|
xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED);
|
|
|
|
if (!console_set_on_cmdline && !xen_initial_domain())
|
|
add_preferred_console("hvc", 0, NULL);
|
|
}
|
|
|
|
static int __init xen_guest_init(void)
|
|
{
|
|
struct xen_add_to_physmap xatp;
|
|
struct shared_info *shared_info_page = NULL;
|
|
struct resource res;
|
|
phys_addr_t grant_frames;
|
|
|
|
if (!xen_domain())
|
|
return 0;
|
|
|
|
if (of_address_to_resource(xen_node, GRANT_TABLE_PHYSADDR, &res)) {
|
|
pr_err("Xen grant table base address not found\n");
|
|
return -ENODEV;
|
|
}
|
|
grant_frames = res.start;
|
|
|
|
xen_events_irq = irq_of_parse_and_map(xen_node, 0);
|
|
if (!xen_events_irq) {
|
|
pr_err("Xen event channel interrupt not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
shared_info_page = (struct shared_info *)get_zeroed_page(GFP_KERNEL);
|
|
|
|
if (!shared_info_page) {
|
|
pr_err("not enough memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
xatp.domid = DOMID_SELF;
|
|
xatp.idx = 0;
|
|
xatp.space = XENMAPSPACE_shared_info;
|
|
xatp.gpfn = virt_to_gfn(shared_info_page);
|
|
if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
|
|
BUG();
|
|
|
|
HYPERVISOR_shared_info = (struct shared_info *)shared_info_page;
|
|
|
|
/* xen_vcpu is a pointer to the vcpu_info struct in the shared_info
|
|
* page, we use it in the event channel upcall and in some pvclock
|
|
* related functions.
|
|
* The shared info contains exactly 1 CPU (the boot CPU). The guest
|
|
* is required to use VCPUOP_register_vcpu_info to place vcpu info
|
|
* for secondary CPUs as they are brought up.
|
|
* For uniformity we use VCPUOP_register_vcpu_info even on cpu0.
|
|
*/
|
|
xen_vcpu_info = __alloc_percpu(sizeof(struct vcpu_info),
|
|
sizeof(struct vcpu_info));
|
|
if (xen_vcpu_info == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (gnttab_setup_auto_xlat_frames(grant_frames)) {
|
|
free_percpu(xen_vcpu_info);
|
|
return -ENOMEM;
|
|
}
|
|
gnttab_init();
|
|
if (!xen_initial_domain())
|
|
xenbus_probe(NULL);
|
|
|
|
/*
|
|
* Making sure board specific code will not set up ops for
|
|
* cpu idle and cpu freq.
|
|
*/
|
|
disable_cpuidle();
|
|
disable_cpufreq();
|
|
|
|
xen_init_IRQ();
|
|
|
|
if (request_percpu_irq(xen_events_irq, xen_arm_callback,
|
|
"events", &xen_vcpu)) {
|
|
pr_err("Error request IRQ %d\n", xen_events_irq);
|
|
return -EINVAL;
|
|
}
|
|
|
|
xen_percpu_init();
|
|
|
|
register_cpu_notifier(&xen_cpu_notifier);
|
|
|
|
return 0;
|
|
}
|
|
early_initcall(xen_guest_init);
|
|
|
|
static int __init xen_pm_init(void)
|
|
{
|
|
if (!xen_domain())
|
|
return -ENODEV;
|
|
|
|
pm_power_off = xen_power_off;
|
|
arm_pm_restart = xen_restart;
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(xen_pm_init);
|
|
|
|
|
|
/* empty stubs */
|
|
void xen_arch_pre_suspend(void) { }
|
|
void xen_arch_post_suspend(int suspend_cancelled) { }
|
|
void xen_timer_resume(void) { }
|
|
void xen_arch_resume(void) { }
|
|
void xen_arch_suspend(void) { }
|
|
|
|
|
|
/* In the hypercall.S file. */
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_event_channel_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_grant_table_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_xen_version);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_console_io);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_sched_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_hvm_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_memory_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_physdev_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_vcpu_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_tmem_op);
|
|
EXPORT_SYMBOL_GPL(HYPERVISOR_multicall);
|
|
EXPORT_SYMBOL_GPL(privcmd_call);
|