Re: [Xen-devel] [PATCH 00/17] x86/hvm: I/O emulation cleanup and fix

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 08/06/2015 16:33, Paul Durrant ha scritto:
> This patch series re-works much of the code involved in emulation of port
> and memory mapped I/O for HVM guests.
>
> The code has become very convoluted and, at least by inspection, certain
> emulations will apparently malfunction.
>
> The series is broken down into 17 patches (which are also available in
> my xenbits repo: http://xenbits.xen.org/gitweb/?p=people/pauldu/xen.git
> on the emulation18 branch) as follows:
Big thanks for your work.
I tested them taking the patches from emulation18 branch.
I tried xl create of a window 7 domU but during xl create dom0 
istant-reboot and there isn't anything about the problem in the logs 
(kern.log, syslog, qemu log, xl log ecc...)
I tried also with linux (hvm) domU and with stdvga instead qxl I had 
setted but same result.
For debug the problem I must enable all xen debug in grub entry and 
redirect output to serial, similar to debug of dom0 boot problem or I 
must do different thing?
Thanks for any reply and sorry for my bad english.

> x86/hvm: simplify hvmemul_do_io()
> x86/hvm: re-name struct hvm_mmio_handler to hvm_mmio_ops
> x86/hvm: unify internal portio and mmio intercepts
> x86/hvm: unify dpci portio intercept with standard portio intercept
> x86/hvm: unify stdvga mmio intercept with standard mmio intercept
> x86/hvm: revert 82ed8716b "fix direct PCI port I/O emulation retry...
> x86/hvm: only call hvm_io_assist() from hvm_wait_for_io()
> x86/hvm: split I/O completion handling from state model
> x86/hvm: remove hvm_io_pending() check in hvmemul_do_io()
> x86/hvm: remove HVMIO_dispatched I/O state
> x86/hvm: remove hvm_io_state enumeration
> x86/hvm: use ioreq_t to track in-flight state
> x86/hvm: only acquire RAM pages for emulation when we need to
> x86/hvm: remove extraneous parameter from hvmtrace_io_assist()
> x86/hvm: make sure translated MMIO reads or writes fall within a page
> x86/hvm: remove multiple open coded 'chunking' loops
> x86/hvm: track large memory mapped accesses by linear address
>
>
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