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

[Paul Durrant <paul.durrant@xxxxxxxxxx>]

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:

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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