Merge tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Merge commit. Changes below are compared with the first parent: aab008db.
Changes
29 files changed · +1264 −80
Only the first 600 diff lines are shown. Download the complete patch.
arch/ia64/include/asm/xen/interface.h
View filediff --git a/arch/ia64/include/asm/xen/interface.h b/arch/ia64/include/asm/xen/interface.h
index fbb5198..09d5f7f 100644
--- a/arch/ia64/include/asm/xen/interface.h
+++ b/arch/ia64/include/asm/xen/interface.h
@@ -77,6 +77,7 @@ DEFINE_GUEST_HANDLE(int);
DEFINE_GUEST_HANDLE(long);
DEFINE_GUEST_HANDLE(void);
DEFINE_GUEST_HANDLE(uint64_t);
+DEFINE_GUEST_HANDLE(uint32_t);
typedef unsigned long xen_pfn_t;
DEFINE_GUEST_HANDLE(xen_pfn_t);
arch/x86/include/asm/xen/interface.h
View filediff --git a/arch/x86/include/asm/xen/interface.h b/arch/x86/include/asm/xen/interface.h
index a1f2db5..cbf0c9d 100644
--- a/arch/x86/include/asm/xen/interface.h
+++ b/arch/x86/include/asm/xen/interface.h
@@ -56,6 +56,7 @@ DEFINE_GUEST_HANDLE(int);
DEFINE_GUEST_HANDLE(long);
DEFINE_GUEST_HANDLE(void);
DEFINE_GUEST_HANDLE(uint64_t);
+DEFINE_GUEST_HANDLE(uint32_t);
#endif
#ifndef HYPERVISOR_VIRT_START
arch/x86/pci/xen.c
View filediff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index d99346e..7415aa9 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -324,6 +324,32 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
out:
return ret;
}
+
+static void xen_initdom_restore_msi_irqs(struct pci_dev *dev, int irq)
+{
+ int ret = 0;
+
+ if (pci_seg_supported) {
+ struct physdev_pci_device restore_ext;
+
+ restore_ext.seg = pci_domain_nr(dev->bus);
+ restore_ext.bus = dev->bus->number;
+ restore_ext.devfn = dev->devfn;
+ ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi_ext,
+ &restore_ext);
+ if (ret == -ENOSYS)
+ pci_seg_supported = false;
+ WARN(ret && ret != -ENOSYS, "restore_msi_ext -> %d\n", ret);
+ }
+ if (!pci_seg_supported) {
+ struct physdev_restore_msi restore;
+
+ restore.bus = dev->bus->number;
+ restore.devfn = dev->devfn;
+ ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi, &restore);
+ WARN(ret && ret != -ENOSYS, "restore_msi -> %d\n", ret);
+ }
+}
#endif
static void xen_teardown_msi_irqs(struct pci_dev *dev)
@@ -446,6 +472,7 @@ int __init pci_xen_initial_domain(void)
#ifdef CONFIG_PCI_MSI
x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs;
x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
+ x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
#endif
xen_setup_acpi_sci();
__acpi_register_gsi = acpi_register_gsi_xen;
arch/x86/xen/enlighten.c
View filediff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 4172af8..b132ade 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -62,6 +62,15 @@
#include <asm/reboot.h>
#include <asm/stackprotector.h>
#include <asm/hypervisor.h>
+#include <asm/mwait.h>
+
+#ifdef CONFIG_ACPI
+#include <linux/acpi.h>
+#include <asm/acpi.h>
+#include <acpi/pdc_intel.h>
+#include <acpi/processor.h>
+#include <xen/interface/platform.h>
+#endif
#include "xen-ops.h"
#include "mmu.h"
@@ -200,13 +209,17 @@ static void __init xen_banner(void)
static __read_mostly unsigned int cpuid_leaf1_edx_mask = ~0;
static __read_mostly unsigned int cpuid_leaf1_ecx_mask = ~0;
+static __read_mostly unsigned int cpuid_leaf1_ecx_set_mask;
+static __read_mostly unsigned int cpuid_leaf5_ecx_val;
+static __read_mostly unsigned int cpuid_leaf5_edx_val;
+
static void xen_cpuid(unsigned int *ax, unsigned int *bx,
unsigned int *cx, unsigned int *dx)
{
unsigned maskebx = ~0;
unsigned maskecx = ~0;
unsigned maskedx = ~0;
-
+ unsigned setecx = 0;
/*
* Mask out inconvenient features, to try and disable as many
* unsupported kernel subsystems as possible.
@@ -214,9 +227,18 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
switch (*ax) {
case 1:
maskecx = cpuid_leaf1_ecx_mask;
+ setecx = cpuid_leaf1_ecx_set_mask;
maskedx = cpuid_leaf1_edx_mask;
break;
+ case CPUID_MWAIT_LEAF:
+ /* Synthesize the values.. */
+ *ax = 0;
+ *bx = 0;
+ *cx = cpuid_leaf5_ecx_val;
+ *dx = cpuid_leaf5_edx_val;
+ return;
+
case 0xb:
/* Suppress extended topology stuff */
maskebx = 0;
@@ -232,9 +254,75 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
*bx &= maskebx;
*cx &= maskecx;
+ *cx |= setecx;
*dx &= maskedx;
+
}
+static bool __init xen_check_mwait(void)
+{
+#ifdef CONFIG_ACPI
+ struct xen_platform_op op = {
+ .cmd = XENPF_set_processor_pminfo,
+ .u.set_pminfo.id = -1,
+ .u.set_pminfo.type = XEN_PM_PDC,
+ };
+ uint32_t buf[3];
+ unsigned int ax, bx, cx, dx;
+ unsigned int mwait_mask;
+
+ /* We need to determine whether it is OK to expose the MWAIT
+ * capability to the kernel to harvest deeper than C3 states from ACPI
+ * _CST using the processor_harvest_xen.c module. For this to work, we
+ * need to gather the MWAIT_LEAF values (which the cstate.c code
+ * checks against). The hypervisor won't expose the MWAIT flag because
+ * it would break backwards compatibility; so we will find out directly
+ * from the hardware and hypercall.
+ */
+ if (!xen_initial_domain())
+ return false;
+
+ ax = 1;
+ cx = 0;
+
+ native_cpuid(&ax, &bx, &cx, &dx);
+
+ mwait_mask = (1 << (X86_FEATURE_EST % 32)) |
+ (1 << (X86_FEATURE_MWAIT % 32));
+
+ if ((cx & mwait_mask) != mwait_mask)
+ return false;
+
+ /* We need to emulate the MWAIT_LEAF and for that we need both
+ * ecx and edx. The hypercall provides only partial information.
+ */
+
+ ax = CPUID_MWAIT_LEAF;
+ bx = 0;
+ cx = 0;
+ dx = 0;
+
+ native_cpuid(&ax, &bx, &cx, &dx);
+
+ /* Ask the Hypervisor whether to clear ACPI_PDC_C_C2C3_FFH. If so,
+ * don't expose MWAIT_LEAF and let ACPI pick the IOPORT version of C3.
+ */
+ buf[0] = ACPI_PDC_REVISION_ID;
+ buf[1] = 1;
+ buf[2] = (ACPI_PDC_C_CAPABILITY_SMP | ACPI_PDC_EST_CAPABILITY_SWSMP);
+
+ set_xen_guest_handle(op.u.set_pminfo.pdc, buf);
+
+ if ((HYPERVISOR_dom0_op(&op) == 0) &&
+ (buf[2] & (ACPI_PDC_C_C1_FFH | ACPI_PDC_C_C2C3_FFH))) {
+ cpuid_leaf5_ecx_val = cx;
+ cpuid_leaf5_edx_val = dx;
+ }
+ return true;
+#else
+ return false;
+#endif
+}
static void __init xen_init_cpuid_mask(void)
{
unsigned int ax, bx, cx, dx;
@@ -261,6 +349,9 @@ static void __init xen_init_cpuid_mask(void)
/* Xen will set CR4.OSXSAVE if supported and not disabled by force */
if ((cx & xsave_mask) != xsave_mask)
cpuid_leaf1_ecx_mask &= ~xsave_mask; /* disable XSAVE & OSXSAVE */
+
+ if (xen_check_mwait())
+ cpuid_leaf1_ecx_set_mask = (1 << (X86_FEATURE_MWAIT % 32));
}
static void xen_set_debugreg(int reg, unsigned long val)
@@ -777,11 +868,11 @@ static DEFINE_PER_CPU(unsigned long, xen_cr0_value);
static unsigned long xen_read_cr0(void)
{
- unsigned long cr0 = percpu_read(xen_cr0_value);
+ unsigned long cr0 = this_cpu_read(xen_cr0_value);
if (unlikely(cr0 == 0)) {
cr0 = native_read_cr0();
- percpu_write(xen_cr0_value, cr0);
+ this_cpu_write(xen_cr0_value, cr0);
}
return cr0;
@@ -791,7 +882,7 @@ static void xen_write_cr0(unsigned long cr0)
{
struct multicall_space mcs;
- percpu_write(xen_cr0_value, cr0);
+ this_cpu_write(xen_cr0_value, cr0);
/* Only pay attention to cr0.TS; everything else is
ignored. */
arch/x86/xen/irq.c
View filediff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index 8bbb465..1573376 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -26,7 +26,7 @@ static unsigned long xen_save_fl(void)
struct vcpu_info *vcpu;
unsigned long flags;
- vcpu = percpu_read(xen_vcpu);
+ vcpu = this_cpu_read(xen_vcpu);
/* flag has opposite sense of mask */
flags = !vcpu->evtchn_upcall_mask;
@@ -50,7 +50,7 @@ static void xen_restore_fl(unsigned long flags)
make sure we're don't switch CPUs between getting the vcpu
pointer and updating the mask. */
preempt_disable();
- vcpu = percpu_read(xen_vcpu);
+ vcpu = this_cpu_read(xen_vcpu);
vcpu->evtchn_upcall_mask = flags;
preempt_enable_no_resched();
@@ -72,7 +72,7 @@ static void xen_irq_disable(void)
make sure we're don't switch CPUs between getting the vcpu
pointer and updating the mask. */
preempt_disable();
- percpu_read(xen_vcpu)->evtchn_upcall_mask = 1;
+ this_cpu_read(xen_vcpu)->evtchn_upcall_mask = 1;
preempt_enable_no_resched();
}
PV_CALLEE_SAVE_REGS_THUNK(xen_irq_disable);
@@ -86,7 +86,7 @@ static void xen_irq_enable(void)
the caller is confused and is trying to re-enable interrupts
on an indeterminate processor. */
- vcpu = percpu_read(xen_vcpu);
+ vcpu = this_cpu_read(xen_vcpu);
vcpu->evtchn_upcall_mask = 0;
/* Doesn't matter if we get preempted here, because any
arch/x86/xen/mmu.c
View filediff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 95c1cf6..988828b 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1071,14 +1071,14 @@ static void drop_other_mm_ref(void *info)
struct mm_struct *mm = info;
struct mm_struct *active_mm;
- active_mm = percpu_read(cpu_tlbstate.active_mm);
+ active_mm = this_cpu_read(cpu_tlbstate.active_mm);
- if (active_mm == mm && percpu_read(cpu_tlbstate.state) != TLBSTATE_OK)
+ if (active_mm == mm && this_cpu_read(cpu_tlbstate.state) != TLBSTATE_OK)
leave_mm(smp_processor_id());
/* If this cpu still has a stale cr3 reference, then make sure
it has been flushed. */
- if (percpu_read(xen_current_cr3) == __pa(mm->pgd))
+ if (this_cpu_read(xen_current_cr3) == __pa(mm->pgd))
load_cr3(swapper_pg_dir);
}
@@ -1185,17 +1185,17 @@ static void __init xen_pagetable_setup_done(pgd_t *base)
static void xen_write_cr2(unsigned long cr2)
{
- percpu_read(xen_vcpu)->arch.cr2 = cr2;
+ this_cpu_read(xen_vcpu)->arch.cr2 = cr2;
}
static unsigned long xen_read_cr2(void)
{
- return percpu_read(xen_vcpu)->arch.cr2;
+ return this_cpu_read(xen_vcpu)->arch.cr2;
}
unsigned long xen_read_cr2_direct(void)
{
- return percpu_read(xen_vcpu_info.arch.cr2);
+ return this_cpu_read(xen_vcpu_info.arch.cr2);
}
static void xen_flush_tlb(void)
@@ -1278,12 +1278,12 @@ static void xen_flush_tlb_others(const struct cpumask *cpus,
static unsigned long xen_read_cr3(void)
{
- return percpu_read(xen_cr3);
+ return this_cpu_read(xen_cr3);
}
static void set_current_cr3(void *v)
{
- percpu_write(xen_current_cr3, (unsigned long)v);
+ this_cpu_write(xen_current_cr3, (unsigned long)v);
}
static void __xen_write_cr3(bool kernel, unsigned long cr3)
@@ -1306,7 +1306,7 @@ static void __xen_write_cr3(bool kernel, unsigned long cr3)
xen_extend_mmuext_op(&op);
if (kernel) {
- percpu_write(xen_cr3, cr3);
+ this_cpu_write(xen_cr3, cr3);
/* Update xen_current_cr3 once the batch has actually
been submitted. */
@@ -1322,7 +1322,7 @@ static void xen_write_cr3(unsigned long cr3)
/* Update while interrupts are disabled, so its atomic with
respect to ipis */
- percpu_write(xen_cr3, cr3);
+ this_cpu_write(xen_cr3, cr3);
__xen_write_cr3(true, cr3);
arch/x86/xen/multicalls.h
View filediff --git a/arch/x86/xen/multicalls.h b/arch/x86/xen/multicalls.h
index dee79b7..9c2e74f 100644
--- a/arch/x86/xen/multicalls.h
+++ b/arch/x86/xen/multicalls.h
@@ -47,7 +47,7 @@ static inline void xen_mc_issue(unsigned mode)
xen_mc_flush();
/* restore flags saved in xen_mc_batch */
- local_irq_restore(percpu_read(xen_mc_irq_flags));
+ local_irq_restore(this_cpu_read(xen_mc_irq_flags));
}
/* Set up a callback to be called when the current batch is flushed */
arch/x86/xen/setup.c
View filediff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index e03c636..1236623 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -420,7 +420,6 @@ void __init xen_arch_setup(void)
boot_cpu_data.hlt_works_ok = 1;
#endif
disable_cpuidle();
- boot_option_idle_override = IDLE_HALT;
WARN_ON(set_pm_idle_to_default());
fiddle_vdso();
}
arch/x86/xen/smp.c
View filediff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 501d4e0..315d8fa 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -76,7 +76,7 @@ static void __cpuinit cpu_bringup(void)
xen_setup_cpu_clockevents();
set_cpu_online(cpu, true);
- percpu_write(cpu_state, CPU_ONLINE);
+ this_cpu_write(cpu_state, CPU_ONLINE);
wmb();
/* We can take interrupts now: we're officially "up". */
drivers/input/misc/Kconfig
View filediff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7b46781..8f675ae 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -558,7 +558,7 @@ config INPUT_CMA3000_I2C
config INPUT_XEN_KBDDEV_FRONTEND
tristate "Xen virtual keyboard and mouse support"
- depends on XEN_FBDEV_FRONTEND
+ depends on XEN
default y
select XEN_XENBUS_FRONTEND
help
drivers/pci/pci.c
View filediff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index af295bb..053670e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3163,6 +3163,31 @@ int __pci_reset_function(struct pci_dev *dev)
EXPORT_SYMBOL_GPL(__pci_reset_function);
/**
+ * __pci_reset_function_locked - reset a PCI device function while holding
+ * the @dev mutex lock.
+ * @dev: PCI device to reset
+ *
+ * Some devices allow an individual function to be reset without affecting
+ * other functions in the same device. The PCI device must be responsive
+ * to PCI config space in order to use this function.
+ *
+ * The device function is presumed to be unused and the caller is holding
+ * the device mutex lock when this function is called.
+ * Resetting the device will make the contents of PCI configuration space
+ * random, so any caller of this must be prepared to reinitialise the
+ * device including MSI, bus mastering, BARs, decoding IO and memory spaces,
+ * etc.
+ *
+ * Returns 0 if the device function was successfully reset or negative if the
+ * device doesn't support resetting a single function.
+ */
+int __pci_reset_function_locked(struct pci_dev *dev)
+{
+ return pci_dev_reset(dev, 1);
+}
+EXPORT_SYMBOL_GPL(__pci_reset_function_locked);
+
+/**
* pci_probe_reset_function - check whether the device can be safely reset
* @dev: PCI device to reset
*
drivers/tty/hvc/Kconfig
View filediff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig
index 48cb8d3..0282a83 100644
--- a/drivers/tty/hvc/Kconfig
+++ b/drivers/tty/hvc/Kconfig
@@ -66,6 +66,14 @@ config HVC_XEN
help
Xen virtual console device driver
+config HVC_XEN_FRONTEND
+ bool "Xen Hypervisor Multiple Consoles support"
+ depends on HVC_XEN
+ select XEN_XENBUS_FRONTEND
+ default y
+ help
+ Xen driver for secondary virtual consoles
+
config HVC_UDBG
bool "udbg based fake hypervisor console"
depends on PPC && EXPERIMENTAL
drivers/tty/hvc/hvc_xen.c
View filediff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index a1b0a75..83d5c88 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -23,44 +23,74 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/types.h>
+#include <linux/list.h>
+#include <asm/io.h>
#include <asm/xen/hypervisor.h>
#include <xen/xen.h>
+#include <xen/interface/xen.h>
+#include <xen/hvm.h>
+#include <xen/grant_table.h>
#include <xen/page.h>
#include <xen/events.h>
#include <xen/interface/io/console.h>
#include <xen/hvc-console.h>
+#include <xen/xenbus.h>
#include "hvc_console.h"
#define HVC_COOKIE 0x58656e /* "Xen" in hex */
-static struct hvc_struct *hvc;
-static int xencons_irq;
+struct xencons_info {
+ struct list_head list;
+ struct xenbus_device *xbdev;
+ struct xencons_interface *intf;
+ unsigned int evtchn;
+ struct hvc_struct *hvc;
+ int irq;
+ int vtermno;
+ grant_ref_t gntref;
+};
+
+static LIST_HEAD(xenconsoles);
+static DEFINE_SPINLOCK(xencons_lock);
/* ------------------------------------------------------------------ */
-static unsigned long console_pfn = ~0ul;
+static struct xencons_info *vtermno_to_xencons(int vtermno)
+{
+ struct xencons_info *entry, *n, *ret = NULL;
+
+ if (list_empty(&xenconsoles))
+ return NULL;
+
+ list_for_each_entry_safe(entry, n, &xenconsoles, list) {
+ if (entry->vtermno == vtermno) {
+ ret = entry;
+ break;
+ }
+ }
+
+ return ret;
+}
-static inline struct xencons_interface *xencons_interface(void)
+static inline int xenbus_devid_to_vtermno(int devid)
{
- if (console_pfn == ~0ul)
- return mfn_to_virt(xen_start_info->console.domU.mfn);
- else
- return __va(console_pfn << PAGE_SHIFT);
+ return devid + HVC_COOKIE;
}
-static inline void notify_daemon(void)
+static inline void notify_daemon(struct xencons_info *cons)
{
/* Use evtchn: this is called early, before irq is set up. */
- notify_remote_via_evtchn(xen_start_info->console.domU.evtchn);
+ notify_remote_via_evtchn(cons->evtchn);
}
-static int __write_console(const char *data, int len)
+static int __write_console(struct xencons_info *xencons,
+ const char *data, int len)
{
- struct xencons_interface *intf = xencons_interface();
XENCONS_RING_IDX cons, prod;
+ struct xencons_interface *intf = xencons->intf;
int sent = 0;
cons = intf->out_cons;
@@ -75,13 +105,16 @@ static int __write_console(const char *data, int len)
intf->out_prod = prod;
if (sent)
- notify_daemon();
+ notify_daemon(xencons);
return sent;
}
static int domU_write_console(uint32_t vtermno, const char *data, int len)
{
int ret = len;
+ struct xencons_info *cons = vtermno_to_xencons(vtermno);
+ if (cons == NULL)
+ return -EINVAL;
/*
* Make sure the whole buffer is emitted, polling if
@@ -90,7 +123,7 @@ static int domU_write_console(uint32_t vtermno, const char *data, int len)
* kernel is crippled.
*/
while (len) {
- int sent = __write_console(data, len);
+ int sent = __write_console(cons, data, len);
data += sent;
len -= sent;
@@ -104,9 +137,13 @@ static int domU_write_console(uint32_t vtermno, const char *data, int len)
static int domU_read_console(uint32_t vtermno, char *buf, int len)
{
- struct xencons_interface *intf = xencons_interface();
+ struct xencons_interface *intf;
XENCONS_RING_IDX cons, prod;
int recv = 0;
+ struct xencons_info *xencons = vtermno_to_xencons(vtermno);
+ if (xencons == NULL)
+ return -EINVAL;
+ intf = xencons->intf;
cons = intf->in_cons;
prod = intf->in_prod;
@@ -119,7 +156,7 @@ static int domU_read_console(uint32_t vtermno, char *buf, int len)
mb(); /* read ring before consuming */
intf->in_cons = cons;
- notify_daemon();
+ notify_daemon(xencons);
return recv;
}
This diff is incomplete. Download the complete patch.
drivers/video/Kconfig
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drivers/xen/Kconfig
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drivers/xen/Makefile
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drivers/xen/sys-hypervisor.c
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drivers/xen/xen-acpi-processor.c
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drivers/xen/xen-balloon.c
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drivers/xen/xen-pciback/pci_stub.c
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drivers/xen/xen-pciback/pciback.h
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drivers/xen/xen-selfballoon.c
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drivers/xen/xenbus/xenbus_client.c
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drivers/xen/xenbus/xenbus_probe.c
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drivers/xen/xenbus/xenbus_probe_frontend.c
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include/linux/pci.h
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include/xen/interface/hvm/params.h
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include/xen/interface/physdev.h
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include/xen/interface/platform.h
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