diff options
Diffstat (limited to 'hw/pci/msix.c')
| -rw-r--r-- | hw/pci/msix.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/hw/pci/msix.c b/hw/pci/msix.c index 4fea7edc89..eb4ef113d1 100644 --- a/hw/pci/msix.c +++ b/hw/pci/msix.c @@ -19,6 +19,7 @@ #include "hw/pci/msi.h" #include "hw/pci/msix.h" #include "hw/pci/pci.h" +#include "hw/xen/xen.h" #include "qemu/range.h" #define MSIX_CAP_LENGTH 12 @@ -78,8 +79,15 @@ static void msix_clr_pending(PCIDevice *dev, int vector) static bool msix_vector_masked(PCIDevice *dev, unsigned int vector, bool fmask) { - unsigned offset = vector * PCI_MSIX_ENTRY_SIZE + PCI_MSIX_ENTRY_VECTOR_CTRL; - return fmask || dev->msix_table[offset] & PCI_MSIX_ENTRY_CTRL_MASKBIT; + unsigned offset = vector * PCI_MSIX_ENTRY_SIZE; + uint32_t *data = (uint32_t *)&dev->msix_table[offset + PCI_MSIX_ENTRY_DATA]; + /* MSIs on Xen can be remapped into pirqs. In those cases, masking + * and unmasking go through the PV evtchn path. */ + if (xen_is_pirq_msi(*data)) { + return false; + } + return fmask || dev->msix_table[offset + PCI_MSIX_ENTRY_VECTOR_CTRL] & + PCI_MSIX_ENTRY_CTRL_MASKBIT; } bool msix_is_masked(PCIDevice *dev, unsigned int vector) |