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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-06 14:59:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-06 14:59:13 -0700
commit99737982ca39065a58021bdc31486ea783f952d3 (patch)
treee402502e0f4700d92c4c0b48d0919ea2687f53dc /arch/x86
parent91f8575685e35f3bd021286bc82d26397458f5a9 (diff)
parent0c4513be3d01a854867446ee793748409cc0ebdf (diff)
Merge tag 'iommu-updates-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel: "The updates are mostly about the x86 IOMMUs this time. Exceptions are the groundwork for the PAMU IOMMU from Freescale (for a PPC platform) and an extension to the IOMMU group interface. On the x86 side this includes a workaround for VT-d to disable interrupt remapping on broken chipsets. On the AMD-Vi side the most important new feature is a kernel command-line interface to override broken information in IVRS ACPI tables and get interrupt remapping working this way. Besides that there are small fixes all over the place." * tag 'iommu-updates-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (24 commits) iommu/tegra: Fix printk formats for dma_addr_t iommu: Add a function to find an iommu group by id iommu/vt-d: Remove warning for HPET scope type iommu: Move swap_pci_ref function to drivers/iommu/pci.h. iommu/vt-d: Disable translation if already enabled iommu/amd: fix error return code in early_amd_iommu_init() iommu/AMD: Per-thread IOMMU Interrupt Handling iommu: Include linux/err.h iommu/amd: Workaround for ERBT1312 iommu/amd: Document ivrs_ioapic and ivrs_hpet parameters iommu/amd: Don't report firmware bugs with cmd-line ivrs overrides iommu/amd: Add ioapic and hpet ivrs override iommu/amd: Add early maps for ioapic and hpet iommu/amd: Extend IVRS special device data structure iommu/amd: Move add_special_device() to __init iommu: Fix compile warnings with forward declarations iommu/amd: Properly initialize irq-table lock iommu/amd: Use AMD specific data structure for irq remapping iommu/amd: Remove map_sg_no_iommu() iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets ...
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/irq_remapping.h9
-rw-r--r--arch/x86/kernel/early-quirks.c20
2 files changed, 29 insertions, 0 deletions
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 95fd3527f632..d806b228d2c0 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -24,10 +24,18 @@
#include <asm/io_apic.h>
+struct IO_APIC_route_entry;
+struct io_apic_irq_attr;
+struct irq_chip;
+struct msi_msg;
+struct pci_dev;
+struct irq_cfg;
+
#ifdef CONFIG_IRQ_REMAP
extern void setup_irq_remapping_ops(void);
extern int irq_remapping_supported(void);
+extern void set_irq_remapping_broken(void);
extern int irq_remapping_prepare(void);
extern int irq_remapping_enable(void);
extern void irq_remapping_disable(void);
@@ -54,6 +62,7 @@ void irq_remap_modify_chip_defaults(struct irq_chip *chip);
static inline void setup_irq_remapping_ops(void) { }
static inline int irq_remapping_supported(void) { return 0; }
+static inline void set_irq_remapping_broken(void) { }
static inline int irq_remapping_prepare(void) { return -ENODEV; }
static inline int irq_remapping_enable(void) { return -ENODEV; }
static inline void irq_remapping_disable(void) { }
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 3755ef494390..94ab6b90dd3f 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -18,6 +18,7 @@
#include <asm/apic.h>
#include <asm/iommu.h>
#include <asm/gart.h>
+#include <asm/irq_remapping.h>
static void __init fix_hypertransport_config(int num, int slot, int func)
{
@@ -192,6 +193,21 @@ static void __init ati_bugs_contd(int num, int slot, int func)
}
#endif
+static void __init intel_remapping_check(int num, int slot, int func)
+{
+ u8 revision;
+
+ revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID);
+
+ /*
+ * Revision 0x13 of this chipset supports irq remapping
+ * but has an erratum that breaks its behavior, flag it as such
+ */
+ if (revision == 0x13)
+ set_irq_remapping_broken();
+
+}
+
#define QFLAG_APPLY_ONCE 0x1
#define QFLAG_APPLIED 0x2
#define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED)
@@ -221,6 +237,10 @@ static struct chipset early_qrk[] __initdata = {
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
+ { PCI_VENDOR_ID_INTEL, 0x3403, PCI_CLASS_BRIDGE_HOST,
+ PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
+ { PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST,
+ PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
{}
};