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-rw-r--r--arch/x86/xen/enlighten.c41
-rw-r--r--arch/x86/xen/setup.c72
-rw-r--r--arch/x86/xen/smp.c2
-rw-r--r--arch/x86/xen/time.c39
-rw-r--r--arch/x86/xen/xen-ops.h2
5 files changed, 111 insertions, 45 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 65d8d79b46a..3c4da8bee06 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -97,6 +97,14 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info;
*/
static int have_vcpu_info_placement = 1;
+static void clamp_max_cpus(void)
+{
+#ifdef CONFIG_SMP
+ if (setup_max_cpus > MAX_VIRT_CPUS)
+ setup_max_cpus = MAX_VIRT_CPUS;
+#endif
+}
+
static void xen_vcpu_setup(int cpu)
{
struct vcpu_register_vcpu_info info;
@@ -104,13 +112,17 @@ static void xen_vcpu_setup(int cpu)
struct vcpu_info *vcpup;
BUG_ON(HYPERVISOR_shared_info == &xen_dummy_shared_info);
- per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
- if (!have_vcpu_info_placement)
- return; /* already tested, not available */
+ if (cpu < MAX_VIRT_CPUS)
+ per_cpu(xen_vcpu,cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
- vcpup = &per_cpu(xen_vcpu_info, cpu);
+ if (!have_vcpu_info_placement) {
+ if (cpu >= MAX_VIRT_CPUS)
+ clamp_max_cpus();
+ return;
+ }
+ vcpup = &per_cpu(xen_vcpu_info, cpu);
info.mfn = arbitrary_virt_to_mfn(vcpup);
info.offset = offset_in_page(vcpup);
@@ -125,6 +137,7 @@ static void xen_vcpu_setup(int cpu)
if (err) {
printk(KERN_DEBUG "register_vcpu_info failed: err=%d\n", err);
have_vcpu_info_placement = 0;
+ clamp_max_cpus();
} else {
/* This cpu is using the registered vcpu info, even if
later ones fail to. */
@@ -731,7 +744,6 @@ static void set_xen_basic_apic_ops(void)
#endif
-
static void xen_clts(void)
{
struct multicall_space mcs;
@@ -927,7 +939,7 @@ static const struct pv_init_ops xen_init_ops __initdata = {
};
static const struct pv_time_ops xen_time_ops __initdata = {
- .sched_clock = xen_sched_clock,
+ .sched_clock = xen_clocksource_read,
};
static const struct pv_cpu_ops xen_cpu_ops __initdata = {
@@ -1028,6 +1040,23 @@ static void xen_crash_shutdown(struct pt_regs *regs)
xen_reboot(SHUTDOWN_crash);
}
+static int
+xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+ xen_reboot(SHUTDOWN_crash);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block xen_panic_block = {
+ .notifier_call= xen_panic_event,
+};
+
+int xen_panic_handler_init(void)
+{
+ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+ return 0;
+}
+
static const struct machine_ops __initdata xen_machine_ops = {
.restart = xen_restart,
.halt = xen_machine_halt,
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index ad0047f47cd..328b0030542 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -20,6 +20,7 @@
#include <xen/page.h>
#include <xen/interface/callback.h>
#include <xen/interface/physdev.h>
+#include <xen/interface/memory.h>
#include <xen/features.h>
#include "xen-ops.h"
@@ -32,6 +33,73 @@ extern void xen_sysenter_target(void);
extern void xen_syscall_target(void);
extern void xen_syscall32_target(void);
+static unsigned long __init xen_release_chunk(phys_addr_t start_addr,
+ phys_addr_t end_addr)
+{
+ struct xen_memory_reservation reservation = {
+ .address_bits = 0,
+ .extent_order = 0,
+ .domid = DOMID_SELF
+ };
+ unsigned long start, end;
+ unsigned long len = 0;
+ unsigned long pfn;
+ int ret;
+
+ start = PFN_UP(start_addr);
+ end = PFN_DOWN(end_addr);
+
+ if (end <= start)
+ return 0;
+
+ printk(KERN_INFO "xen_release_chunk: looking at area pfn %lx-%lx: ",
+ start, end);
+ for(pfn = start; pfn < end; pfn++) {
+ unsigned long mfn = pfn_to_mfn(pfn);
+
+ /* Make sure pfn exists to start with */
+ if (mfn == INVALID_P2M_ENTRY || mfn_to_pfn(mfn) != pfn)
+ continue;
+
+ set_xen_guest_handle(reservation.extent_start, &mfn);
+ reservation.nr_extents = 1;
+
+ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
+ &reservation);
+ WARN(ret != 1, "Failed to release memory %lx-%lx err=%d\n",
+ start, end, ret);
+ if (ret == 1) {
+ set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
+ len++;
+ }
+ }
+ printk(KERN_CONT "%ld pages freed\n", len);
+
+ return len;
+}
+
+static unsigned long __init xen_return_unused_memory(unsigned long max_pfn,
+ const struct e820map *e820)
+{
+ phys_addr_t max_addr = PFN_PHYS(max_pfn);
+ phys_addr_t last_end = 0;
+ unsigned long released = 0;
+ int i;
+
+ for (i = 0; i < e820->nr_map && last_end < max_addr; i++) {
+ phys_addr_t end = e820->map[i].addr;
+ end = min(max_addr, end);
+
+ released += xen_release_chunk(last_end, end);
+ last_end = e820->map[i].addr + e820->map[i].size;
+ }
+
+ if (last_end < max_addr)
+ released += xen_release_chunk(last_end, max_addr);
+
+ printk(KERN_INFO "released %ld pages of unused memory\n", released);
+ return released;
+}
/**
* machine_specific_memory_setup - Hook for machine specific memory setup.
@@ -67,6 +135,8 @@ char * __init xen_memory_setup(void)
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
+ xen_return_unused_memory(xen_start_info->nr_pages, &e820);
+
return "Xen";
}
@@ -156,6 +226,8 @@ void __init xen_arch_setup(void)
struct physdev_set_iopl set_iopl;
int rc;
+ xen_panic_handler_init();
+
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index a29693fd313..25f232b18a8 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -394,6 +394,8 @@ static void stop_self(void *v)
load_cr3(swapper_pg_dir);
/* should set up a minimal gdt */
+ set_cpu_online(cpu, false);
+
HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL);
BUG();
}
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index b3c6c59ed30..a86df42e46a 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -155,45 +155,6 @@ static void do_stolen_accounting(void)
account_idle_ticks(ticks);
}
-/*
- * Xen sched_clock implementation. Returns the number of unstolen
- * nanoseconds, which is nanoseconds the VCPU spent in RUNNING+BLOCKED
- * states.
- */
-unsigned long long xen_sched_clock(void)
-{
- struct vcpu_runstate_info state;
- cycle_t now;
- u64 ret;
- s64 offset;
-
- /*
- * Ideally sched_clock should be called on a per-cpu basis
- * anyway, so preempt should already be disabled, but that's
- * not current practice at the moment.
- */
- preempt_disable();
-
- now = xen_clocksource_read();
-
- get_runstate_snapshot(&state);
-
- WARN_ON(state.state != RUNSTATE_running);
-
- offset = now - state.state_entry_time;
- if (offset < 0)
- offset = 0;
-
- ret = state.time[RUNSTATE_blocked] +
- state.time[RUNSTATE_running] +
- offset;
-
- preempt_enable();
-
- return ret;
-}
-
-
/* Get the TSC speed from Xen */
unsigned long xen_tsc_khz(void)
{
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index f9153a300bc..00d59d608ed 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -101,4 +101,6 @@ void xen_sysret32(void);
void xen_sysret64(void);
void xen_adjust_exception_frame(void);
+extern int xen_panic_handler_init(void);
+
#endif /* XEN_OPS_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 05:38:06 +0000