Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

  and branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm

* 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm:
  xen: register xen pci notifier
  xen: initialize cpu masks for pv guests in xen_smp_init
  xen: add a missing #include to arch/x86/pci/xen.c
  xen: mask the MTRR feature from the cpuid
  xen: make hvc_xen console work for dom0.
  xen: add the direct mapping area for ISA bus access
  xen: Initialize xenbus for dom0.
  xen: use vcpu_ops to setup cpu masks
  xen: map a dummy page for local apic and ioapic in xen_set_fixmap
  xen: remap MSIs into pirqs when running as initial domain
  xen: remap GSIs as pirqs when running as initial domain
  xen: introduce XEN_DOM0 as a silent option
  xen: map MSIs into pirqs
  xen: support GSI -> pirq remapping in PV on HVM guests
  xen: add xen hvm acpi_register_gsi variant
  acpi: use indirect call to register gsi in different modes
  xen: implement xen_hvm_register_pirq
  xen: get the maximum number of pirqs from xen
  xen: support pirq != irq

* 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: (27 commits)
  X86/PCI: Remove the dependency on isapnp_disable.
  xen: Update Makefile with CONFIG_BLOCK dependency for biomerge.c
  MAINTAINERS: Add myself to the Xen Hypervisor Interface and remove Chris Wright.
  x86: xen: Sanitse irq handling (part two)
  swiotlb-xen: On x86-32 builts, select SWIOTLB instead of depending on it.
  MAINTAINERS: Add myself for Xen PCI and Xen SWIOTLB maintainer.
  xen/pci: Request ACS when Xen-SWIOTLB is activated.
  xen-pcifront: Xen PCI frontend driver.
  xenbus: prevent warnings on unhandled enumeration values
  xenbus: Xen paravirtualised PCI hotplug support.
  xen/x86/PCI: Add support for the Xen PCI subsystem
  x86: Introduce x86_msi_ops
  msi: Introduce default_[teardown|setup]_msi_irqs with fallback.
  x86/PCI: Export pci_walk_bus function.
  x86/PCI: make sure _PAGE_IOMAP it set on pci mappings
  x86/PCI: Clean up pci_cache_line_size
  xen: fix shared irq device passthrough
  xen: Provide a variant of xen_poll_irq with timeout.
  xen: Find an unbound irq number in reverse order (high to low).
  xen: statically initialize cpu_evtchn_mask_p
  ...

Fix up trivial conflicts in drivers/pci/Makefile

3 files changed, 57 insertions, 19 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index c05872aa3ce0..71232b941b6c 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -513,35 +513,62 @@ int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
         return 0;
 }
 
-/*
- * success: return IRQ number (>=0)
- * failure: return < 0
- */
-int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
+static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
+                                 int trigger, int polarity)
 {
-        unsigned int irq;
-        unsigned int plat_gsi = gsi;
-
 #ifdef CONFIG_PCI
         /*
          * Make sure all (legacy) PCI IRQs are set as level-triggered.
          */
-        if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
-                if (trigger == ACPI_LEVEL_SENSITIVE)
-                        eisa_set_level_irq(gsi);
-        }
+        if (trigger == ACPI_LEVEL_SENSITIVE)
+                eisa_set_level_irq(gsi);
 #endif
 
+        return gsi;
+}
+
+static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
+                                    int trigger, int polarity)
+{
 #ifdef CONFIG_X86_IO_APIC
-        if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
-                plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
-        }
+        gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 #endif
+
+        return gsi;
+}
+
+int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
+                           int trigger, int polarity) = acpi_register_gsi_pic;
+
+/*
+ * success: return IRQ number (>=0)
+ * failure: return < 0
+ */
+int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
+{
+        unsigned int irq;
+        unsigned int plat_gsi = gsi;
+
+        plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
         irq = gsi_to_irq(plat_gsi);
 
         return irq;
 }
 
+void __init acpi_set_irq_model_pic(void)
+{
+        acpi_irq_model = ACPI_IRQ_MODEL_PIC;
+        __acpi_register_gsi = acpi_register_gsi_pic;
+        acpi_ioapic = 0;
+}
+
+void __init acpi_set_irq_model_ioapic(void)
+{
+        acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
+        __acpi_register_gsi = acpi_register_gsi_ioapic;
+        acpi_ioapic = 1;
+}
+
 /*
  *  ACPI based hotplug support for CPU
  */
@@ -1259,8 +1286,7 @@ static void __init acpi_process_madt(void)
                          */
                         error = acpi_parse_madt_ioapic_entries();
                         if (!error) {
-                                acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
-                                acpi_ioapic = 1;
+                                acpi_set_irq_model_ioapic();
 
                                 smp_found_config = 1;
                         }
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 8ae808d110f4..0929191d83cf 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3331,7 +3331,7 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
         return 0;
 }
 
-int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
         int node, ret, sub_handle, index = 0;
         unsigned int irq, irq_want;
@@ -3389,7 +3389,7 @@ error:
         return ret;
 }
 
-void arch_teardown_msi_irq(unsigned int irq)
+void native_teardown_msi_irq(unsigned int irq)
 {
         destroy_irq(irq);
 }
@@ -3650,6 +3650,11 @@ void __init probe_nr_irqs_gsi(void)
         printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi);
 }
 
+int get_nr_irqs_gsi(void)
+{
+        return nr_irqs_gsi;
+}
+
 #ifdef CONFIG_SPARSE_IRQ
 int __init arch_probe_nr_irqs(void)
 {
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index cd6da6bf3eca..ceb2911aa439 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -6,10 +6,12 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/module.h>
+#include <linux/pci.h>
 
 #include <asm/bios_ebda.h>
 #include <asm/paravirt.h>
 #include <asm/pci_x86.h>
+#include <asm/pci.h>
 #include <asm/mpspec.h>
 #include <asm/setup.h>
 #include <asm/apic.h>
@@ -99,3 +101,8 @@ struct x86_platform_ops x86_platform = {
 };
 
 EXPORT_SYMBOL_GPL(x86_platform);
+struct x86_msi_ops x86_msi = {
+        .setup_msi_irqs = native_setup_msi_irqs,
+        .teardown_msi_irq = native_teardown_msi_irq,
+        .teardown_msi_irqs = default_teardown_msi_irqs,
+};