Hi Steven,
I found some issues regarding this patch.
When I'm trying to start windows as VMX guest (with no drivers, of course)
under this patch, the guests fail. I ran with three images, windows 2000, XP
and 2003.
For 2000 and XP, QEMU windows do not show, there are two lines in the serial
output:
(XEN) Create event channels for vcpu 0.
(XEN) Send on unbound Xen event channel?
For 2003 guest, QEMU can start, but before the windows start screen shows, it
crashes and restarts, complaining about unreasonable mmio opcodes. The serial
output is:
(XEN) (GUEST: 1) unsupported PCI BIOS function 0x0E
(XEN) (GUEST: 1) int13_harddisk: function 15, unmapped device for
ELDL=82
(XEN) 0, This opcode isn't handled yet!
(XEN) handle_mmio: failed to decode instruction
(XEN) mmio opcode: va 0xf821f600, gpa 0xa9600, len 2: 00 00
(XEN) domain_crash_sync called from platform.c:880
(XEN) Domain 1 (vcpu#0) crashed on cpu#2:
(XEN) ----[ Xen-3.0-unstable Not tainted ]----
(XEN) CPU: 2
(XEN) EIP: 0008:[<8081d986>]
(XEN) EFLAGS: 00010202 CONTEXT: hvm
(XEN) eax: 00008008 ebx: 000003ce ecx: 000003ce edx: f821f600
(XEN) esi: 8081d9fa edi: f886ecd0 ebp: f886ecfc esp: f886ecbc
(XEN) cr0: 8001003b cr3: 8f500000
(XEN) ds: 0023 es: 0023 fs: 0030 gs: 0000 ss: 0010 cs: 0008
(XEN) Create event channels for vcpu 0.
(XEN) Send on unbound Xen event channel?
(XEN) (GUEST: 2) HVM Loader
(XEN) (GUEST: 2) Loading ROMBIOS ...
(XEN) (GUEST: 2) Loading Cirrus VGABIOS ...
(XEN) (GUEST: 2) Loading VMXAssist ...
(XEN) (GUEST: 2) VMX go ...
(XEN) (GUEST: 2) VMXAssist (Aug 2 2006)
(XEN) (GUEST: 2) Memory size 512 MB
(XEN) (GUEST: 2) E820 map:
(XEN) (GUEST: 2) 0000000000000000 - 000000000009F800 (RAM)
(XEN) (GUEST: 2) 000000000009F800 - 00000000000A0000 (Reserved)
(XEN) (GUEST: 2) 00000000000A0000 - 00000000000C0000 (Type 16)
(XEN) (GUEST: 2) 00000000000F0000 - 0000000000100000 (Reserved)
(XEN) (GUEST: 2) 0000000000100000 - 000000001FFFE000 (RAM)
(XEN) (GUEST: 2) 000000001FFFE000 - 000000001FFFF000 (Type 18)
(XEN) (GUEST: 2) 000000001FFFF000 - 0000000020000000 (Type 17)
(XEN) (GUEST: 2) 0000000020000000 - 0000000020003000 (ACPI NVS)
(XEN) (GUEST: 2) 0000000020003000 - 000000002000D000 (ACPI Data)
(XEN) (GUEST: 2) 00000000FEC00000 - 0000000100000000 (Type 16)
(XEN) (GUEST: 2)
(XEN) (GUEST: 2) Start BIOS ...
(XEN) (GUEST: 2) Starting emulated 16-bit real-mode: ip=F000:FFF0
(XEN) (GUEST: 2) rombios.c,v 1.138 2005/05/07 15:55:26 vruppert Exp $
(XEN) (GUEST: 2) Remapping master: ICW2 0x8 -> 0x20
(XEN) (GUEST: 2) Remapping slave: ICW2 0x70 -> 0x28
(XEN) (GUEST: 2) VGABios $Id: vgabios.c,v 1.61 2005/05/24 16:50:50
vruppert Exp $
(XEN) (GUEST: 2) HVMAssist BIOS, 1 cpu, $Revision: 1.138 $ $Date:
2005/05/07 15:55:26 $
(XEN) (GUEST: 2)
(XEN) (GUEST: 2) ata0-0: PCHS=16383/16/63 translation=lba
LCHS=1024/255/63
(XEN) (GUEST: 2) ata0 master: QEMU HARDDISK ATA-7 Hard-Disk (12289
MBytes)
(XEN) (GUEST: 2) ata0-1: PCHS=3047/16/63 translation=lba LCHS=761/64/63
(XEN) (GUEST: 2) ata0 slave: QEMU HARDDISK ATA-7 Hard-Disk (1500
MBytes)
(XEN) (GUEST: 2) ata1 master: QEMU CD-ROM ATAPI-4 CD-Rom/DVD-Rom
(XEN) (GUEST: 2) ata1 slave: Unknown device
(XEN) (GUEST: 2)
(XEN) (GUEST: 2) Booting from CD-Rom...
(XEN) (GUEST: 2) unsupported PCI BIOS function 0x0E
(XEN) (GUEST: 2) int13_harddisk: function 15, unmapped device for
ELDL=82
(XEN) 0, This opcode isn't handled yet!
(XEN) handle_mmio: failed to decode instruction
(XEN) mmio opcode: va 0xf821f600, gpa 0xa9600, len 2: 00 00
(XEN) domain_crash_sync called from platform.c:880
(XEN) Domain 2 (vcpu#0) crashed on cpu#2:
(XEN) ----[ Xen-3.0-unstable Not tainted ]----
(XEN) CPU: 2
(XEN) EIP: 0008:[<8081d986>]
(XEN) EFLAGS: 00010202 CONTEXT: hvm
(XEN) eax: 00008008 ebx: 000003ce ecx: 000003ce edx: f821f600
(XEN) esi: 8081d9fa edi: f886ecd0 ebp: f886ecfc esp: f886ecbc
(XEN) cr0: 8001003b cr3: 2ded8000
(XEN) ds: 0023 es: 0023 fs: 0030 gs: 0000 ss: 0010 cs: 0008
Meanwhile, I don't experience any problems for Linux guest. Do you have any
ideas why this happens?
Best regards,
Qing He
>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Steven Smith
>Sent: 2006年7月26日 23:35
>To: xen-devel@xxxxxxxxxxxxxxxxxxx
>Cc: sos22@xxxxxxxxxxxxx
>Subject: Re: [Xen-devel] Paravirtualised drivers for fully virtualised domains
>
>I've just put an updated version of these patches up at
>http://www.cl.cam.ac.uk/~sos22/pv-on-hvm/rev2 . There's also an
>equivalent single big patch at
>http://www.cl.cam.ac.uk/~sos22/pv-on-hvm/rev2.combined . Thank you to
>everyone who gave feedback on the previous version.
>
>The main changes since last time are:
>
>-- Support for SMP guests
>-- Support for 64 bit guests on a 64 bit hypervisor
>-- Partial support for 32 bit guests on a 64 bit hypervisor: the network
> interface works, but the block device doesn't.
>
>The block device can be made to work by #define'ing ALIEN_INTERFACES
>in blkif.h, but drivers compiled in that way won't work with 32 on 32.
>The problem here is that blkif_request_t contains extra padding in 64
>bit builds, and so is a different size, and so the block ring layout
>is different.
>
>Other structures with similar problems are handled either by run time
>tests in the drivers (shared_info_t) or translation wrappers in the
>hypervisor (xen_feature_info_t, xen_add_to_physmap_t), but trying to
>do this for the block rings would require far more painful and
>extensive surgery. I'm inclined to stick with multiply compiling the
>frontend drivers in the short term, although it'll obviously need
>doing in a slightly less grotty way.
>
>Steven.
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