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| author | Jorgen Hansen <jhansen@vmware.com> | 2022-02-07 02:27:21 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-08 12:15:59 +0100 |
| commit | 8cb520bea1470ca205980fbf030ed1f472f4af2f (patch) | |
| tree | d6326bfff31950f08d12738485c5b4c8ce72b9a3 | |
| parent | eed2298d936087a1c85e0fa6f7170028e4f4fded (diff) | |
| download | lwn-8cb520bea1470ca205980fbf030ed1f472f4af2f.tar.gz lwn-8cb520bea1470ca205980fbf030ed1f472f4af2f.zip | |
VMCI: dma dg: set OS page size
Tell the device the page size used by the OS.
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Link: https://lore.kernel.org/r/20220207102725.2742-5-jhansen@vmware.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/vmw_vmci/vmci_guest.c | 4 | ||||
| -rw-r--r-- | include/linux/vmw_vmci_defs.h | 1 |
2 files changed, 5 insertions, 0 deletions
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 |