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| author |   Weidong Han <weidong.han@intel.com> | 2009-05-23 00:41:15 +0800 |
|---|---|---|
| committer |   David Woodhouse <David.Woodhouse@intel.com> | 2009-06-23 22:09:17 +0100 |
| commit | f007e99c8e2e322b8331aba72414715119a2920d (patch) | |
| tree | 616bfcdda74341dc8b5d9ea1013bb7506407a961 /include/linux/dmar.h | |
| parent | Intel-IOMMU, intr-remap: set the whole 128bits of irte when modify/free it (diff) | |
| download | wireguard-linux-f007e99c8e2e322b8331aba72414715119a2920d.tar.xz wireguard-linux-f007e99c8e2e322b8331aba72414715119a2920d.zip | |
Intel-IOMMU, intr-remap: source-id checking
To support domain-isolation usages, the platform hardware must be
capable of uniquely identifying the requestor (source-id) for each
interrupt message. Without source-id checking for interrupt remapping
, a rouge guest/VM with assigned devices can launch interrupt attacks
to bring down anothe guest/VM or the VMM itself.
This patch adds source-id checking for interrupt remapping, and then
really isolates interrupts for guests/VMs with assigned devices.
Because PCI subsystem is not initialized yet when set up IOAPIC
entries, use read_pci_config_byte to access PCI config space directly.
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/dmar.h')
| -rw-r--r-- | include/linux/dmar.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 1731fb5fd775..4a2b162c256a 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -126,6 +126,8 @@ extern int free_irte(int irq); extern int irq_remapped(int irq); extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev); extern struct intel_iommu *map_ioapic_to_ir(int apic); +extern int set_ioapic_sid(struct irte *irte, int apic); +extern int set_msi_sid(struct irte *irte, struct pci_dev *dev); #else static inline int alloc_irte(struct intel_iommu *iommu, int irq, u16 count) { @@ -156,6 +158,15 @@ static inline struct intel_iommu *map_ioapic_to_ir(int apic) { return NULL; } +static inline int set_ioapic_sid(struct irte *irte, int apic) +{ + return 0; +} +static inline int set_msi_sid(struct irte *irte, struct pci_dev *dev) +{ + return 0; +} + #define irq_remapped(irq) (0) #define enable_intr_remapping(mode) (-1) #define disable_intr_remapping() (0) |