> Hi,
>
> On 09/12/2012 03:13 PM, Alon Levy wrote:
> > So far we have used the agent to notify the guest of a request to
> > change
> > the monitors configurations (heads) on the qxl device. This patch
> > introduces
> > a new interrupt and new fields in the qxl rom to notify the guest
> > about
> > a new request, similarly to how physical hardware notifies the
> > driver.
> >
> > To avoid overwriting the rom while the guest is reading it there is
> > a
> > client_monitors_config_updating field in ROM. The update protocol
> > is:
>
> Sorry to be a pita, but that part of the commit message no longer
> applies.
I'll fix before pushing, thanks.
>
> >
> > qemu:
> > (2) fill QXLRom::client_monitors_config
> > (3) raise QXL_INTERRUPT_CLIENT_MONITORS_CONFIG
> >
> > guest:
> > (1) clear QXL_INTERRUPT_CLIENT_MONITORS_CONFIG bit in irq status
> > (2) read QXLRom::client_monitors_config
> > (3) (verify-crc)? done : goto 2
> >
> > If the interrupt mask is ~0 or 0, or does not have
> > QXL_INTERRUPT_CLIENT_MONITORS_CONFIG set, we also assume it doesn't
> > support
> > this interrupt.
> > ---
> > spice/qxl_dev.h | 18 ++++++++++++++++++
> > 1 file changed, 18 insertions(+)
> >
> > diff --git a/spice/qxl_dev.h b/spice/qxl_dev.h
> > index 50784dc..48ad403 100644
> > --- a/spice/qxl_dev.h
> > +++ b/spice/qxl_dev.h
> > @@ -125,6 +125,13 @@ typedef struct SPICE_ATTR_PACKED QXLRect {
> > int32_t right;
> > } QXLRect;
> >
> > +typedef struct SPICE_ATTR_PACKED QXLURect {
> > + uint32_t top;
> > + uint32_t left;
> > + uint32_t bottom;
> > + uint32_t right;
> > +} QXLURect;
> > +
> > /* qxl-1 compat: append only */
> > typedef struct SPICE_ATTR_PACKED QXLRom {
> > uint32_t magic;
> > @@ -151,8 +158,16 @@ typedef struct SPICE_ATTR_PACKED QXLRom {
> > /* appended for qxl-4 */
> > uint8_t client_present;
> > uint8_t client_capabilities[58];
> > + uint32_t client_monitors_config_crc;
> > + struct {
> > + uint16_t count;
> > + uint16_t padding;
> > + QXLURect heads[64];
> > + } client_monitors_config;
> > } QXLRom;
> >
> > +#define CLIENT_MONITORS_CONFIG_CRC32_POLY 0xedb88320
> > +
> > /* qxl-1 compat: fixed */
> > typedef struct SPICE_ATTR_PACKED QXLMode {
> > uint32_t id;
> > @@ -234,6 +249,9 @@ SPICE_RING_DECLARE(QXLReleaseRing, uint64_t,
> > QXL_RELEASE_RING_SIZE);
> > #define QXL_INTERRUPT_IO_CMD (1 << 2)
> > #define QXL_INTERRUPT_ERROR (1 << 3)
> > #define QXL_INTERRUPT_CLIENT (1 << 4)
> > +#define QXL_INTERRUPT_CLIENT_MONITORS_CONFIG (1 << 5)
> > +
> > +#define QXL_GUEST_CAP_CLIENT_MONITORS_CONFIG_ISR 0
> >
> > /* qxl-1 compat: append only */
> > typedef struct SPICE_ATTR_PACKED QXLRam {
> >
>
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