Commit b7a7bb35 authored by Jan Kiszka's avatar Jan Kiszka Committed by Michael S. Tsirkin
Browse files

intel-iommu: Accept 64-bit writes to FEADDR 

Xen is doing this [1] and currently triggers an abort.

[1] http://xenbits.xenproject.org/gitweb/?p=xen.git;a=blob;f=xen/drivers/passthrough/vtd/iommu.c;h=daaed0abbdd06b6ba3d948ea103aadf02651e83c;hb=refs/heads/master#l1108



Reported-by: default avatarLuis Lloret <luis_lloret@mentor.com>
Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 2080a29f

hw/i386/intel_iommu.c

+9 −2
Original line number Diff line number Diff line
@@ -2129,8 +2129,15 @@ static void vtd_mem_write(void *opaque, hwaddr addr, 


    /* Fault Event Address Register, 32-bit */

    case DMAR_FEADDR_REG:

        assert(size == 4);

        if (size == 4) {

            vtd_set_long(s, addr, val);

        } else {

            /*

             * While the register is 32-bit only, some guests (Xen...) write to

             * it with 64-bit.

             */

            vtd_set_quad(s, addr, val);

        }

        break;



    /* Fault Event Upper Address Register, 32-bit */