Hey, On Thu, Jun 11, 2015 at 12:39:50PM +0100, Frediano Ziglio wrote:
Allow to specify maximum number of head to QXL driver.
I've tested this with an older qemu without qxl-vga.max_outputs, and with a newer one with support for it, and in both cases this is doing the right thing.
Signed-off-by: Frediano Ziglio <fziglio@redhat.com> --- src/qemu/qemu_capabilities.c | 2 ++ src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_command.c | 11 +++++++++++ tests/qemucapabilitiesdata/caps_1.2.2-1.caps | 1 + tests/qemucapabilitiesdata/caps_1.2.2-1.replies | 8 ++++++++ tests/qemucapabilitiesdata/caps_1.3.1-1.caps | 1 + tests/qemucapabilitiesdata/caps_1.3.1-1.replies | 8 ++++++++ tests/qemucapabilitiesdata/caps_1.4.2-1.caps | 1 + tests/qemucapabilitiesdata/caps_1.4.2-1.replies | 8 ++++++++ tests/qemucapabilitiesdata/caps_1.5.3-1.caps | 1 + tests/qemucapabilitiesdata/caps_1.5.3-1.replies | 8 ++++++++ tests/qemucapabilitiesdata/caps_1.6.0-1.caps | 1 + tests/qemucapabilitiesdata/caps_1.6.0-1.replies | 8 ++++++++ tests/qemucapabilitiesdata/caps_1.6.50-1.caps | 1 + tests/qemucapabilitiesdata/caps_1.6.50-1.replies | 8 ++++++++ tests/qemucapabilitiesdata/caps_2.1.1-1.caps | 1 + tests/qemucapabilitiesdata/caps_2.1.1-1.replies | 8 ++++++++ 17 files changed, 77 insertions(+)
The patch to support the "max_outputs" in Qemu is still not merged but I got agreement on the name of the argument.
Actually can be a compatiblity problem as heads in the XML configuration was set by default to '1'.
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index ca7a7c2..cdc2575 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -285,6 +285,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "dea-key-wrap", "pci-serial", "aarch64-off", + "qxl-vga.max_outputs", );
In order to be consistent with the rest of the file, this should be + + "qxl-vga.max_outputs", /* 190 */
@@ -1643,6 +1644,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsQxl[] = {
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsQxlVga[] = { { "vgamem_mb", QEMU_CAPS_QXL_VGA_VGAMEM }, + { "max_outputs", QEMU_CAPS_QXL_VGA_MAX_OUTPUTS }, };
struct virQEMUCapsObjectTypeProps { diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index b5a7770..a2ea84b 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -229,6 +229,7 @@ typedef enum { QEMU_CAPS_DEA_KEY_WRAP = 187, /* -machine dea_key_wrap */ QEMU_CAPS_DEVICE_PCI_SERIAL = 188, /* -device pci-serial */ QEMU_CAPS_CPU_AARCH64_OFF = 189, /* -cpu ...,aarch64=off */ + QEMU_CAPS_QXL_VGA_MAX_OUTPUTS = 190, /* qxl-vga.max_outputs */
QEMU_CAPS_LAST, /* this must always be the last item */ } virQEMUCapsFlags; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 0a6d92f..2bd63e1 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -5610,6 +5610,11 @@ qemuBuildDeviceVideoStr(virDomainDefPtr def, /* QEMU accepts mebibytes for vgamem_mb. */ virBufferAsprintf(&buf, ",vgamem_mb=%u", video->vgamem / 1024); } + + if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_QXL_VGA_MAX_OUTPUTS) && + video->heads > 0) { + virBufferAsprintf(&buf, ",max_outputs=%u", video->heads); + } } else if (video->vram && ((video->type == VIR_DOMAIN_VIDEO_TYPE_VGA && virQEMUCapsGet(qemuCaps, QEMU_CAPS_VGA_VGAMEM)) || @@ -10234,6 +10239,7 @@ qemuBuildCommandLine(virConnectPtr conn, unsigned int ram = def->videos[0]->ram; unsigned int vram = def->videos[0]->vram; unsigned int vgamem = def->videos[0]->vgamem; + unsigned int heads = def->videos[0]->heads;
if (vram > (UINT_MAX / 1024)) { virReportError(VIR_ERR_OVERFLOW, @@ -10264,6 +10270,11 @@ qemuBuildCommandLine(virConnectPtr conn, virCommandAddArgFormat(cmd, "%s.vgamem_mb=%u", dev, vgamem / 1024); } + if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_QXL_VGA_MAX_OUTPUTS) && heads > 0) { + virCommandAddArg(cmd, "-global"); + virCommandAddArgFormat(cmd, "%s.max_outputs=%u", + dev, heads); + }
This part of the code is a fallback for QEMU not supporting -device. As the max_outputs option is new, I'm not sure this will ever be triggered.
}
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE) && diff --git a/tests/qemucapabilitiesdata/caps_1.2.2-1.caps b/tests/qemucapabilitiesdata/caps_1.2.2-1.caps index 30239df..7791e42 100644 --- a/tests/qemucapabilitiesdata/caps_1.2.2-1.caps +++ b/tests/qemucapabilitiesdata/caps_1.2.2-1.caps @@ -120,4 +120,5 @@ <flag name='vmware-svga.vgamem_mb'/> <flag name='qxl.vgamem_mb'/> <flag name='qxl-vga.vgamem_mb'/> + <flag name='qxl-vga.max_outputs'/> </qemuCaps> diff --git a/tests/qemucapabilitiesdata/caps_1.2.2-1.replies b/tests/qemucapabilitiesdata/caps_1.2.2-1.replies index f501218..aa1d3f9 100644 --- a/tests/qemucapabilitiesdata/caps_1.2.2-1.replies +++ b/tests/qemucapabilitiesdata/caps_1.2.2-1.replies @@ -1488,6 +1488,10 @@ "type": "pci-devfn" }, { + "name": "max_outputs", + "type": "uint16" + }, + { "name": "vgamem_mb", "type": "uint32" }, @@ -1554,6 +1558,10 @@ "type": "pci-devfn" }, { + "name": "max_outputs", + "type": "uint16" + }, + { "name": "vgamem_mb", "type": "uint32" },
I have no idea how all these tests work, so I have only took a quick look, and checked that make check still passes. I find it odd to have qxl-vga.max_outputs be listed for older qemu releases, but maybe this is how it's meant to be done. All in all, looks good to me. Christophe