Tell the device the page size used by the OS. Reviewed-by: Vishnu Dasa <vdasa@xxxxxxxxxx> Signed-off-by: Jorgen Hansen <jhansen@xxxxxxxxxx> --- drivers/misc/vmw_vmci/vmci_guest.c | 4 ++++ include/linux/vmw_vmci_defs.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c index b93afe7f7119..ced187e7ac08 100644 --- a/drivers/misc/vmw_vmci/vmci_guest.c +++ b/drivers/misc/vmw_vmci/vmci_guest.c @@ -578,6 +578,10 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, /* Let the host know which capabilities we intend to use. */ vmci_write_reg(vmci_dev, caps_in_use, VMCI_CAPS_ADDR); + /* Let the device know the size for pages passed down. */ + if (caps_in_use & VMCI_CAPS_DMA_DATAGRAM) + vmci_write_reg(vmci_dev, PAGE_SHIFT, VMCI_GUEST_PAGE_SHIFT); + /* Set up global device so that we can start sending datagrams */ spin_lock_irq(&vmci_dev_spinlock); vmci_dev_g = vmci_dev; diff --git a/include/linux/vmw_vmci_defs.h b/include/linux/vmw_vmci_defs.h index 1ce2cffdc3ae..4167779469fd 100644 --- a/include/linux/vmw_vmci_defs.h +++ b/include/linux/vmw_vmci_defs.h @@ -21,6 +21,7 @@ #define VMCI_CAPS_ADDR 0x18 #define VMCI_RESULT_LOW_ADDR 0x1c #define VMCI_RESULT_HIGH_ADDR 0x20 +#define VMCI_GUEST_PAGE_SHIFT 0x34 /* Max number of devices. */ #define VMCI_MAX_DEVICES 1 -- 2.25.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
