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SubjectRe: [PATCH 3/6] Input: Update vmmouse.c to use the common VMW_PORT macros
On Tue, Dec 01, 2015 at 02:18:49PM -0800, Sinclair Yeh wrote:
> v2:
> Instead of replacing existing VMMOUSE defines, only modify enough
> to use the new VMW_PORT define.
>
> v3:
> Use updated VMWARE_PORT() which requires hypervisor magic as an added
> parameter
>
> Signed-off-by: Sinclair Yeh <syeh@vmware.com>
> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
> Reviewed-by: Alok N Kataria <akataria@vmware.com>
> Cc: pv-drivers@vmware.com
> Cc: linux-graphics-maintainer@vmware.com
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: linux-kernel@vger.kernel.org
> Cc: virtualization@lists.linux-foundation.org
> Cc: linux-input@vger.kernel.org
> ---
> drivers/input/mouse/vmmouse.c | 22 +++++++---------------
> 1 file changed, 7 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/input/mouse/vmmouse.c b/drivers/input/mouse/vmmouse.c
> index e272f06..d34e3e4 100644
> --- a/drivers/input/mouse/vmmouse.c
> +++ b/drivers/input/mouse/vmmouse.c
> @@ -19,6 +19,7 @@
> #include <linux/slab.h>
> #include <linux/module.h>
> #include <asm/hypervisor.h>
> +#include <asm/vmware.h>
>
> #include "psmouse.h"
> #include "vmmouse.h"
> @@ -84,21 +85,12 @@ struct vmmouse_data {
> * implementing the vmmouse protocol. Should never execute on
> * bare metal hardware.
> */
> -#define VMMOUSE_CMD(cmd, in1, out1, out2, out3, out4) \
> -({ \
> - unsigned long __dummy1, __dummy2; \
> - __asm__ __volatile__ ("inl %%dx" : \
> - "=a"(out1), \
> - "=b"(out2), \
> - "=c"(out3), \
> - "=d"(out4), \
> - "=S"(__dummy1), \
> - "=D"(__dummy2) : \
> - "a"(VMMOUSE_PROTO_MAGIC), \
> - "b"(in1), \
> - "c"(VMMOUSE_PROTO_CMD_##cmd), \
> - "d"(VMMOUSE_PROTO_PORT) : \
> - "memory"); \
> +#define VMMOUSE_CMD(cmd, in1, out1, out2, out3, out4) \
> +({ \
> + unsigned long __dummy1 = 0, __dummy2 = 0; \

Why do we need to initialize dummies?

> + VMW_PORT(in1, VMMOUSE_PROTO_CMD_##cmd, VMMOUSE_PROTO_PORT, \
> + VMMOUSE_PROTO_MAGIC, \
> + out1, out2, out3, out4, __dummy1, __dummy2); \
> })
>

Thanks.

--
Dmitry


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