Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 platform updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Add "Jailhouse" hypervisor support (Jan Kiszka)

   - Update DeviceTree support (Ivan Gorinov)

   - Improve DMI date handling (Andy Shevchenko)"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/PCI: Fix a potential regression when using dmi_get_bios_year()
  firmware/dmi_scan: Uninline dmi_get_bios_year() helper
  x86/devicetree: Use CPU description from Device Tree
  of/Documentation: Specify local APIC ID in "reg"
  MAINTAINERS: Add entry for Jailhouse
  x86/jailhouse: Allow to use PCI_MMCONFIG without ACPI
  x86: Consolidate PCI_MMCONFIG configs
  x86: Align x86_64 PCI_MMCONFIG with 32-bit variant
  x86/jailhouse: Enable PCI mmconfig access in inmates
  PCI: Scan all functions when running over Jailhouse
  jailhouse: Provide detection for non-x86 systems
  x86/devicetree: Fix device IRQ settings in DT
  x86/devicetree: Initialize device tree before using it
  pci: Simplify code by using the new dmi_get_bios_year() helper
  ACPI/sleep: Simplify code by using the new dmi_get_bios_year() helper
  x86/pci: Simplify code by using the new dmi_get_bios_year() helper
  dmi: Introduce the dmi_get_bios_year() helper function
  x86/platform/quark: Re-use DEFINE_SHOW_ATTRIBUTE() macro
  x86/platform/atom: Re-use DEFINE_SHOW_ATTRIBUTE() macro

4 files changed, 41 insertions, 11 deletions

diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 46cde0912762..b35923e3a926 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -376,12 +376,10 @@ void __init acpi_sleep_no_blacklist(void)
 
 static void __init acpi_sleep_dmi_check(void)
 {
-	int year;
-
 	if (ignore_blacklist)
 		return;
 
-	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012)
+	if (dmi_get_bios_year() >= 2012)
 		acpi_nvs_nosave_s3();
 
 	dmi_check_system(acpisleep_dmi_table);
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index e763e1484331..e35c5e04c46a 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -1005,6 +1005,26 @@ out:
 EXPORT_SYMBOL(dmi_get_date);
 
 /**
+ *	dmi_get_bios_year - get a year out of DMI_BIOS_DATE field
+ *
+ *	Returns year on success, -ENXIO if DMI is not selected,
+ *	or a different negative error code if DMI field is not present
+ *	or not parseable.
+ */
+int dmi_get_bios_year(void)
+{
+	bool exists;
+	int year;
+
+	exists = dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL);
+	if (!exists)
+		return -ENODATA;
+
+	return year ? year : -ERANGE;
+}
+EXPORT_SYMBOL(dmi_get_bios_year);
+
+/**
  *	dmi_walk - Walk the DMI table and get called back for every record
  *	@decode: Callback function
  *	@private_data: Private data to be passed to the callback function
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index bd6f156dc3cf..99ec0ef5ba82 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2258,8 +2258,6 @@ void pci_config_pm_runtime_put(struct pci_dev *pdev)
  */
 bool pci_bridge_d3_possible(struct pci_dev *bridge)
 {
-	unsigned int year;
-
 	if (!pci_is_pcie(bridge))
 		return false;
 
@@ -2287,10 +2285,8 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
 		 * It should be safe to put PCIe ports from 2015 or newer
 		 * to D3.
 		 */
-		if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) &&
-		    year >= 2015) {
+		if (dmi_get_bios_year() >= 2015)
 			return true;
-		}
 		break;
 	}
 
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ef5377438a1e..3c365dc996e7 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -16,6 +16,7 @@
 #include <linux/pci-aspm.h>
 #include <linux/aer.h>
 #include <linux/acpi.h>
+#include <linux/hypervisor.h>
 #include <linux/irqdomain.h>
 #include <linux/pm_runtime.h>
 #include "pci.h"
@@ -2518,14 +2519,29 @@ static unsigned int pci_scan_child_bus_extend(struct pci_bus *bus,
 {
 	unsigned int used_buses, normal_bridges = 0, hotplug_bridges = 0;
 	unsigned int start = bus->busn_res.start;
-	unsigned int devfn, cmax, max = start;
+	unsigned int devfn, fn, cmax, max = start;
 	struct pci_dev *dev;
+	int nr_devs;
 
 	dev_dbg(&bus->dev, "scanning bus\n");
 
 	/* Go find them, Rover! */
-	for (devfn = 0; devfn < 0x100; devfn += 8)
-		pci_scan_slot(bus, devfn);
+	for (devfn = 0; devfn < 256; devfn += 8) {
+		nr_devs = pci_scan_slot(bus, devfn);
+
+		/*
+		 * The Jailhouse hypervisor may pass individual functions of a
+		 * multi-function device to a guest without passing function 0.
+		 * Look for them as well.
+		 */
+		if (jailhouse_paravirt() && nr_devs == 0) {
+			for (fn = 1; fn < 8; fn++) {
+				dev = pci_scan_single_device(bus, devfn + fn);
+				if (dev)
+					dev->multifunction = 1;
+			}
+		}
+	}
 
 	/* Reserve buses for SR-IOV capability */
 	used_buses = pci_iov_bus_range(bus);