[Qemu-devel] Missing patch in QEMU which is in QEMU-KVM

[Qemu-devel] Missing patch in QEMU which is in QEMU-KVM

[Gerhard Wiesinger]

Hello,

I miss the following patch in QEMU which is in QEMU-KVM:
http://article.gmane.org/gmane.comp.emulators.kvm.devel/13557

commit a7fe0297840908a4fd65a1cf742481ccd45960eb
Author: Andreas Winkelbauer <andreas.winkelbauer@gmx.at>
Date:   Sun Feb 24 10:33:27 2008 +0200

     Extend vram size to 16MB

     this is useful for high resolutions.

     Signed-off-by: Avi Kivity <avi@qumranet.com>

In general: Which patches are missing in QEMU which are in QEMU-KVM and 
vice versa?

Thnx.

Ciao,
Gerhard

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Re: [Qemu-devel] Missing patch in QEMU which is in QEMU-KVM

[Jan Kiszka]

On 2012-02-13 07:21, Gerhard Wiesinger wrote:
> Hello,
> 
> I miss the following patch in QEMU which is in QEMU-KVM:
> http://article.gmane.org/gmane.comp.emulators.kvm.devel/13557
> 
> commit a7fe0297840908a4fd65a1cf742481ccd45960eb
> Author: Andreas Winkelbauer <andreas.winkelbauer@gmx.at>
> Date:   Sun Feb 24 10:33:27 2008 +0200
> 
>     Extend vram size to 16MB
> 
>     this is useful for high resolutions.
> 
>     Signed-off-by: Avi Kivity <avi@qumranet.com>

This patch no longer applies, the delta became much smaller:

diff --git a/hw/vga_int.h b/hw/vga_int.h
index c1e700f..21047a5 100644
--- a/hw/vga_int.h
+++ b/hw/vga_int.h
@@ -34,8 +34,8 @@
 /* bochs VBE support */
 #define CONFIG_BOCHS_VBE

-#define VBE_DISPI_MAX_XRES              1600
-#define VBE_DISPI_MAX_YRES              1200
+#define VBE_DISPI_MAX_XRES              2560
+#define VBE_DISPI_MAX_YRES              1600
 #define VBE_DISPI_MAX_BPP               32

 #define VBE_DISPI_INDEX_ID              0x0
@@ -224,7 +224,7 @@ void vga_init_vbe(VGACommonState *s, MemoryRegion
*address_space);
 extern const uint8_t sr_mask[8];
 extern const uint8_t gr_mask[16];

-#define VGA_RAM_SIZE (8192 * 1024)
+#define VGA_RAM_SIZE (16 * 1024 * 1024)
 #define VGABIOS_FILENAME "vgabios.bin"
 #define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"

Someone needs to bake a proper patch out of this and post it. There must
be also some VGA BIOS differences, but I haven't looked at the details.
That should be resolved at this chance as well.

> 
> In general: Which patches are missing in QEMU which are in QEMU-KVM and
> vice versa?

Basically no more patches, only features that partially require some
refactoring work:

 - KVM in-kernel PIC (patches + dependencies pending)
 - TPR acceleration for Windows (series under review, needs some minor
   further work)
 - MSI rework and support for KVM in-kernel irqchip support
 - PCI device assignment (old-style and/or VFIO)

Then we are done and qemu-kvm can be closed. But I would not expect this
before 1.2, maybe even 1.3. However, once only PCI assignment is
pending, the vast majority of users can switch.

Jan

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