diff options
| -rw-r--r-- | arch/x86/pci/xen.c | 2 | ||||
| -rw-r--r-- | drivers/pci/msi.c | 7 | ||||
| -rw-r--r-- | include/linux/msi.h | 1 |
3 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 093f5f4272d3..5ef62ed20ba4 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -427,6 +427,7 @@ int __init pci_xen_init(void) x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs; x86_msi.msi_mask_irq = xen_nop_msi_mask_irq; x86_msi.msix_mask_irq = xen_nop_msix_mask_irq; + pci_msi_ignore_mask = 1; #endif return 0; } @@ -508,6 +509,7 @@ int __init pci_xen_initial_domain(void) x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs; x86_msi.msi_mask_irq = xen_nop_msi_mask_irq; x86_msi.msix_mask_irq = xen_nop_msix_mask_irq; + pci_msi_ignore_mask = 1; #endif xen_setup_acpi_sci(); __acpi_register_gsi = acpi_register_gsi_xen; diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 9fab30af0e75..066c2fb9763a 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -23,6 +23,7 @@ #include "pci.h" static int pci_msi_enable = 1; +int pci_msi_ignore_mask; #define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1) @@ -167,7 +168,7 @@ u32 default_msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag) { u32 mask_bits = desc->masked; - if (!desc->msi_attrib.maskbit) + if (pci_msi_ignore_mask || !desc->msi_attrib.maskbit) return 0; mask_bits &= ~mask; @@ -199,6 +200,10 @@ u32 default_msix_mask_irq(struct msi_desc *desc, u32 flag) u32 mask_bits = desc->masked; unsigned offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE + PCI_MSIX_ENTRY_VECTOR_CTRL; + + if (pci_msi_ignore_mask) + return 0; + mask_bits &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT; if (flag) mask_bits |= PCI_MSIX_ENTRY_CTRL_MASKBIT; diff --git a/include/linux/msi.h b/include/linux/msi.h index 44f4746d033b..86dc501a1534 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -10,6 +10,7 @@ struct msi_msg { u32 data; /* 16 bits of msi message data */ }; +extern int pci_msi_ignore_mask; /* Helper functions */ struct irq_data; struct msi_desc; |