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Hi all. I got another trouble after I using that patch, which windows 2003 32bit guest VNC display wasn't normal, please see the attached. In addition, windows 2003 64bit guest had a normal display. I couldn't understand it, anyone can help me? Thanks you in advance. The patch is: http://xen.1045712.n5.nabble.com/PATCH-QEMU-Clear-bios-framebuffer-with-minimal-writes-td2511735.html Best Regards, -Gonglei > -----Original Message----- > Subject: Re: [Xen-devel] [Qemu-devel] Cirrus VGA slow screen update, show > blank screen last 13s or so for windows XP guest > > > On Aug 20, 2013, at 3:45 PM, Konrad Rzeszutek Wilk > <konrad.wilk@xxxxxxxxxx> > wrote: > > > On Sat, Aug 17, 2013 at 09:04:29AM +0000, Gonglei (Arei) wrote: > >> Hi, > >> The fundamental reason is traditional qemu-dm and upstream qemu using a > different vgabios-cirrus.bin, > >> qemu-dm is using xen-4.1.2/tools/firmware/vgabios/ > VGABIOS-lgpl-latest.cirrus.bin, > >> but upstream qemu is using qemu-1.2.2/pc-bios/vgabios-cirrus.bin > >> > >> the pivotal patch is : > >> > >> # HG changeset patch > >> # User Keir Fraser <keir@xxxxxxxxxxxxx> > >> # Date 1193391667 -3600 > >> # Node ID d31f63db5f1e88deadc5461adda07b77c22873d7 > >> # Parent 413107fa49a50e5c61ac390dc1870d8995b2a012 > >> > >> x86, hvm: Allow Cirrus VGA BIOS to clear framebuffer with minimal PIO > writes. > >> > >> Signed-off-by: Ben Guthro <bguthro@xxxxxxxxxxxxxx> > >> Signed-off-by: Gary Grebus <ggrebus@xxxxxxxxxxxxxxx> > > > > Ben's new address is <benjamin.guthro@xxxxxxxxxx>. CC-ing him here. > > FWIW, I took Gary's patch, and made it apply to unstable, at that time. > He was the primary developer, in that case. > > That's how I recall it, anyhow...from 6 years ago. > > I don't have Gary's new contact info. > > Regards, > Ben > > > > >> > >> diff -r 413107fa49a5 -r d31f63db5f1e tools/firmware/vgabios/clext.c > >> --- a/tools/firmware/vgabios/clext.c Fri Oct 26 10:33:12 2007 +0100 > >> +++ b/tools/firmware/vgabios/clext.c Fri Oct 26 10:41:07 2007 +0100 > >> @@ -1489,14 +1489,26 @@ > >> mov dx, #0x3ce > >> out dx, ax > >> push ax > >> - mov cx, #0xa000 > >> - mov es, cx > >> - xor di, di > >> + > >> +;; Windows Vista appears to be emulating this sequence as part of > changing > >> +;; screen resolution, but it generates 4096 writes per iteration. > >> +;; Instead, use a magic register sequence to write the whole bank. > >> +;;mov cx, #0xa000 > >> +;;mov es, cx > >> +;;xor di, di > >> +;;mov ax, si > >> +;;mov cx, #8192 > >> +;;cld > >> +;;rep > >> +;; stosw > >> mov ax, si > >> - mov cx, #8192 > >> - cld > >> - rep > >> - stosw > >> + shl ax, #8 > >> + mov al, #0xfe > >> + out dx, ax ;; Low byte of value to be written to the bank > >> + mov ax, si > >> + mov al, #0xff > >> + out dx, ax ;; High byte and trigger the write > >> + > >> pop ax > >> inc ah > >> cmp ah, bl > >> diff -r 413107fa49a5 -r d31f63db5f1e tools/ioemu/hw/cirrus_vga.c > >> --- a/tools/ioemu/hw/cirrus_vga.c Fri Oct 26 10:33:12 2007 +0100 > >> +++ b/tools/ioemu/hw/cirrus_vga.c Fri Oct 26 10:41:07 2007 +0100 > >> @@ -294,6 +294,7 @@ > >> > >> static void cirrus_bitblt_reset(CirrusVGAState *s); > >> static void cirrus_update_memory_access(CirrusVGAState *s); > >> +static void cirrus_vga_mem_writew(void *opaque, target_phys_addr_t > addr, uint32_t val); > >> > >> /*************************************** > >> * > >> @@ -1497,6 +1498,17 @@ > >> case 0x31: // BLT STATUS/START > >> cirrus_write_bitblt(s, reg_value); > >> break; > >> + > >> + // Extension to allow BIOS to clear 16K VRAM bank in one operation > >> + case 0xFE: > >> + s->gr[reg_index] = reg_value; // Lower byte of value to be written > >> + break; > >> + case 0xFF: { > >> + target_phys_addr_t addr; > >> + for (addr = 0xa0000; addr < 0xa4000; addr += 2) > >> + cirrus_vga_mem_writew(s, addr, (reg_value << 8) | s->gr[0xFE]); > >> + } > >> + break; > >> default: > >> #ifdef DEBUG_CIRRUS > >> printf("cirrus: outport gr_index %02x, gr_value %02x\n", reg_index, > >> > >> By replacing the vgabios-cirrus.bin, the windows XP guest screen updating > >> is > fast with upstream qemu. > >> > >> And I test the latest vgabios-0.7a come from > >> http://www.nongnu.org/vgabios/#DOWNLOAD > >> but the problem of blank screen remain. > >> >> Best Regards! >> -Gonglei >> >> >>> -----Original Message----- >>> From: Gonglei (Arei) >>> Sent: Friday, August 16, 2013 5:10 PM >>> To: Gonglei (Arei); 'Pasi KÃrkkÃinen' >>> Cc: 'Gerd Hoffmann'; 'Andreas FÃrber'; Hanweidong; Luonengjun; >>> 'qemu-devel@xxxxxxxxxx'; 'xen-devel@xxxxxxxxxxxxx'; 'Anthony Liguori'; >>> Huangweidong (Hardware); 'Ian.Jackson@xxxxxxxxxxxxx'; 'Anthony Liguori'; >>> Yanqiangjun; Yangxiaowei >>> Subject: RE: [Xen-devel] [Qemu-devel] Cirrus VGA slow screen update, show >>> blank screen last 13s or so for windows XP guest >>> >>> Hi, all >>> I compared the traditional qemu-dm and upstream qemu, >>> and I found the upstream qemu will create the expansion ROM at f3000000, >>> but qemu-dm don't. >>> the details as below (by "lspci -vnnn"): >>> >>> 1) traditional qemu-dm: >>> 00:02.0 VGA compatible controller [0300]: Cirrus Logic GD 5446 [1013:00b8] >>> (prog-if 00 [VGA controller]) >>> Subsystem: XenSource, Inc. Device [5853:0001] >>> Flags: bus master, fast devsel, latency 0, IRQ 11 >>> Memory at f0000000 (32-bit, prefetchable) [size=32M] >>> Memory at f3000000 (32-bit, non-prefetchable) [size=4K] >>> Kernel modules: cirrusfb >>> >>> 2) upstream qemu: >>> 00:02.0 VGA compatible controller [0300]: Cirrus Logic GD 5446 [1013:00b8] >>> (prog-if 00 [VGA controller]) >>> Subsystem: XenSource, Inc. Device [5853:0001] >>> Physical Slot: 2 >>> Flags: bus master, fast devsel, latency 0, IRQ 11 >>> Memory at f0000000 (32-bit, prefetchable) [size=32M] >>> Memory at f3020000 (32-bit, non-prefetchable) [size=4K] >>> Expansion ROM at f3000000 [disabled] [size=64K] >>> Kernel modules: cirrusfb >>> >>> I tried to simply delete the expansion ROM at function pci_add_option_rom, >>> such as >>> >>> //pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom); >>> >>> but the VNC viewer only can see black screen, but RDP works well. >>> Any ideas about the cirrus's expansion ROM? >>> Slow screen refresh has any relationship with cirrus's expansion ROM? >>> Thank you in advanceï >>> >>> BTW, I added some log in stdvga.c(xen-4.1.2/xen/arch/x86/hvm): >>> static int stdvga_intercept_mmio(ioreq_t *p) >>> { >>> struct domain *d = current->domain; >>> struct hvm_hw_stdvga *s = &d->arch.hvm_domain.stdvga; >>> int buf = 0, rc; >>> static int count_1 = 0; >>> static int count_2 = 0; >>> >>> if ( p->size > 8 ) >>> { >>> gdprintk(XENLOG_WARNING, "invalid mmio size %d\n", (int)p->size); >>> return X86EMUL_UNHANDLEABLE; >>> } >>> >>> spin_lock(&s->lock); >>> >>> if ( s->stdvga && s->cache ) >>> { >>> switch ( p->type ) >>> { >>> case IOREQ_TYPE_COPY: >>> buf = mmio_move(s, p); >>> count_1++; >>> if (count_1 % 1000 == 0) >>> gdprintk(XENLOG_WARNING, " =uvp= enter mmio_move, >>> count_1=%d\n", count_1); >>> if ( !buf ) >>> s->cache = 0; >>> break; >>> default: >>> gdprintk(XENLOG_WARNING, "unsupported mmio request >>> type:%d " >>> "addr:0x%04x data:0x%04x size:%d count:%d >>> state:%d " >>> "isptr:%d dir:%d df:%d\n", >>> p->type, (int)p->addr, (int)p->data, (int)p->size, >>> (int)p->count, p->state, >>> p->data_is_ptr, p->dir, p->df); >>> s->cache = 0; >>> } >>> } >>> else >>> { >>> buf = (p->dir == IOREQ_WRITE); >>> count_2++; >>> if (count_2 % 5000 == 0) >>> gdprintk(XENLOG_WARNING, " >>> vga mmio count_2=%d\n", >>> count_2); >>> } >>> >>> rc = (buf && hvm_buffered_io_send(p)); >>> >>> spin_unlock(&s->lock); >>> >>> return rc ? X86EMUL_OKAY : X86EMUL_UNHANDLEABLE; >>> } >>> >>> and I got the below result with upstream qemu and tranditional qemu-dm: >>> >>> 1) traditional qemu-dm: >>> (XEN) stdvga.c:152:d2 entering stdvga and caching modes >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=460000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=461000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=462000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=463000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=464000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=465000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=466000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=467000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=468000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=469000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=470000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=471000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=472000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=473000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=474000 >>> (XEN) stdvga.c:577:d2 =uvp= enter mmio_move, count_1=475000 >>> (XEN) stdvga.c:156:d2 leaving stdvga >>> >>> 2) upstream qemu: >>> (XEN) stdvga.c:152:d1 entering stdvga and caching modes >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=233000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=234000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=235000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=236000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=237000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=238000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=239000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=240000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=241000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=242000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=243000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=244000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=245000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=246000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=247000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=248000 >>> (XEN) stdvga.c:577:d1 =uvp= enter mmio_move, count_1=249000 >>> (XEN) stdvga.c:156:d1 leaving stdvga >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=8400000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=8405000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=8410000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=8415000 >>> ... ... //Omit some similar >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=12570000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=12575000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=12580000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=12585000 >>> (XEN) stdvga.c:596:d1 >>> vga mmio count_2=12590000 >>> >>> Upstream qemu has lot's of MMIO access Memory region 0xa0000~0xc0000 >>> than traditional qemu-dm. >>> >>> Best Regards! >>> >>> -Gonglei >>> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@xxxxxxxxxxxxx >> http://lists.xen.org/xen-devel

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Re: [Xen-devel] [Qemu-devel] Cirrus VGA slow screen update, show blank screen last 13s or so for windows XP guest