#include <xen/page.h>
#include <xen/interface/sched.h>
#include <xen/xen-ops.h>
-#include <asm/paravirt.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
+#include <asm/xen/xen-ops.h>
#include <asm/system_misc.h>
+#include <asm/efi.h>
#include <linux/interrupt.h>
#include <linux/irqreturn.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/cpuidle.h>
#include <linux/time64.h>
#include <linux/timekeeping.h>
#include <linux/timekeeper_internal.h>
+#include <linux/acpi.h>
#include <linux/mm.h>
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,
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);
-static unsigned long long xen_stolen_accounting(int cpu)
-{
- struct vcpu_runstate_info state;
-
- BUG_ON(cpu != smp_processor_id());
-
- xen_get_runstate_snapshot(&state);
-
- WARN_ON(state.state != RUNSTATE_running);
-
- return state.time[RUNSTATE_runnable] + state.time[RUNSTATE_offline];
-}
-
static void xen_read_wallclock(struct timespec64 *ts)
{
u32 version;
return IRQ_HANDLED;
}
+static __initdata struct {
+ const char *compat;
+ const char *prefix;
+ const char *version;
+ bool found;
+} hyper_node = {"xen,xen", "xen,xen-", NULL, false};
+
+static int __init fdt_find_hyper_node(unsigned long node, const char *uname,
+ int depth, void *data)
+{
+ const void *s = NULL;
+ int len;
+
+ if (depth != 1 || strcmp(uname, "hypervisor") != 0)
+ return 0;
+
+ if (of_flat_dt_is_compatible(node, hyper_node.compat))
+ hyper_node.found = true;
+
+ s = of_get_flat_dt_prop(node, "compatible", &len);
+ if (strlen(hyper_node.prefix) + 3 < len &&
+ !strncmp(hyper_node.prefix, s, strlen(hyper_node.prefix)))
+ hyper_node.version = s + strlen(hyper_node.prefix);
+
+ /*
+ * Check if Xen supports EFI by checking whether there is the
+ * "/hypervisor/uefi" node in DT. If so, runtime services are available
+ * through proxy functions (e.g. in case of Xen dom0 EFI implementation
+ * they call special hypercall which executes relevant EFI functions)
+ * and that is why they are always enabled.
+ */
+ if (IS_ENABLED(CONFIG_XEN_EFI)) {
+ if ((of_get_flat_dt_subnode_by_name(node, "uefi") > 0) &&
+ !efi_runtime_disabled())
+ set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
+ }
+
+ return 0;
+}
+
/*
* 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) {
+ of_scan_flat_dt(fdt_find_hyper_node, NULL);
+ if (!hyper_node.found) {
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) {
+
+ if (hyper_node.version == NULL) {
pr_debug("Xen version not found\n");
return;
}
- pr_info("Xen %s support found\n", version);
+ pr_info("Xen %s support found\n", hyper_node.version);
xen_domain_type = XEN_HVM_DOMAIN;
add_preferred_console("hvc", 0, NULL);
}
+static void __init xen_acpi_guest_init(void)
+{
+#ifdef CONFIG_ACPI
+ struct xen_hvm_param a;
+ int interrupt, trigger, polarity;
+
+ a.domid = DOMID_SELF;
+ a.index = HVM_PARAM_CALLBACK_IRQ;
+
+ if (HYPERVISOR_hvm_op(HVMOP_get_param, &a)
+ || (a.value >> 56) != HVM_PARAM_CALLBACK_TYPE_PPI) {
+ xen_events_irq = 0;
+ return;
+ }
+
+ interrupt = a.value & 0xff;
+ trigger = ((a.value >> 8) & 0x1) ? ACPI_EDGE_SENSITIVE
+ : ACPI_LEVEL_SENSITIVE;
+ polarity = ((a.value >> 8) & 0x2) ? ACPI_ACTIVE_LOW
+ : ACPI_ACTIVE_HIGH;
+ xen_events_irq = acpi_register_gsi(NULL, interrupt, trigger, polarity);
+#endif
+}
+
+static void __init xen_dt_guest_init(void)
+{
+ struct device_node *xen_node;
+
+ xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
+ if (!xen_node) {
+ pr_err("Xen support was detected before, but it has disappeared\n");
+ return;
+ }
+
+ xen_events_irq = irq_of_parse_and_map(xen_node, 0);
+}
+
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;
+ if (!acpi_disabled)
+ xen_acpi_guest_init();
+ else
+ xen_dt_guest_init();
- 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;
}
+ /*
+ * The fdt parsing codes have set EFI_RUNTIME_SERVICES if Xen EFI
+ * parameters are found. Force enable runtime services.
+ */
+ if (efi_enabled(EFI_RUNTIME_SERVICES))
+ xen_efi_runtime_setup();
+
shared_info_page = (struct shared_info *)get_zeroed_page(GFP_KERNEL);
if (!shared_info_page) {
if (xen_vcpu_info == NULL)
return -ENOMEM;
- if (gnttab_setup_auto_xlat_frames(grant_frames)) {
+ xen_auto_xlat_grant_frames.count = gnttab_max_grant_frames();
+ if (xen_xlate_map_ballooned_pages(&xen_auto_xlat_grant_frames.pfn,
+ &xen_auto_xlat_grant_frames.vaddr,
+ xen_auto_xlat_grant_frames.count)) {
free_percpu(xen_vcpu_info);
return -ENOMEM;
}
register_cpu_notifier(&xen_cpu_notifier);
- pv_time_ops.steal_clock = xen_stolen_accounting;
- static_key_slow_inc(¶virt_steal_enabled);
+ xen_time_setup_guest();
+
if (xen_initial_domain())
pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier);
EXPORT_SYMBOL_GPL(HYPERVISOR_tmem_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_platform_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_multicall);
+EXPORT_SYMBOL_GPL(HYPERVISOR_vm_assist);
EXPORT_SYMBOL_GPL(privcmd_call);
projects / cascardo / linux.git / blobdiff