Re: [PATCH for-4.8] x86/pv: Fix the handling of `int $x` for vectors which alias exceptions

["Jan Beulich" <JBeulich@suse.com>]

>>> On 22.06.17 at 21:12, <andrew.cooper3@citrix.com> wrote:
> The claim at the top of c/s 2e426d6eecf "x86/traps: Drop use_error_code
> parameter from do_{,guest_}trap()" is only actually true for hardware
> exceptions.  It is not true for `int $x` instructions (which never push error
> code), irrespective of whether the vector aliases an exception or not.
> 
> Furthermore, c/s 6480cc6280e "x86/traps: Fix failed ASSERT() in
> do_guest_trap()" really should have helped highlight that a regression had
> been introduced.
> 
> Modify pv_inject_event() to understand event types other than
> X86_EVENTTYPE_HW_EXCEPTION, and introduce pv_inject_sw_interrupt() for the
> `int $x` handling code.
> 
> Add further assertions to pv_inject_event() concerning the type of events
> passed in, which in turn requires that do_guest_trap() set its type
> appropriately (which is now used exclusively for hardware exceptions).
> 
> This is logically a backport of c/s 5c4f579e0ee4f38cad5636bbf8ce700a394338d0
> from Xen 4.9, but disentangled from the other injection work.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Thanks, applied.

Jan


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