diff options
| -rw-r--r-- | hw/ppc/spapr_pci.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 39563288f5..cea9469872 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -469,6 +469,8 @@ static const MemoryRegionOps spapr_msi_ops = { void spapr_pci_msi_init(sPAPREnvironment *spapr, hwaddr addr) { + uint64_t window_size = 4096; + /* * As MSI/MSIX interrupts trigger by writing at MSI/MSIX vectors, * we need to allocate some memory to catch those writes coming @@ -476,10 +478,19 @@ void spapr_pci_msi_init(sPAPREnvironment *spapr, hwaddr addr) * As MSIMessage:addr is going to be the same and MSIMessage:data * is going to be a VIRQ number, 4 bytes of the MSI MR will only * be used. + * + * For KVM we want to ensure that this memory is a full page so that + * our memory slot is of page size granularity. */ +#ifdef CONFIG_KVM + if (kvm_enabled()) { + window_size = getpagesize(); + } +#endif + spapr->msi_win_addr = addr; memory_region_init_io(&spapr->msiwindow, NULL, &spapr_msi_ops, spapr, - "msi", getpagesize()); + "msi", window_size); memory_region_add_subregion(get_system_memory(), spapr->msi_win_addr, &spapr->msiwindow); } |