Commit 8cb520be authored by Jorgen Hansen's avatar Jorgen Hansen Committed by Greg Kroah-Hartman
Browse files

VMCI: dma dg: set OS page size 



Tell the device the page size used by the OS.

Reviewed-by: default avatarVishnu Dasa <vdasa@vmware.com>
Signed-off-by: default avatarJorgen Hansen <jhansen@vmware.com>
Link: https://lore.kernel.org/r/20220207102725.2742-5-jhansen@vmware.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent eed2298d

drivers/misc/vmw_vmci/vmci_guest.c

+4 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/vmw_vmci_defs.h

+1 −0
Original line number Diff line number Diff line
@@ -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