> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 24 June 2015 16:21
> To: Paul Durrant
> Cc: Andrew Cooper; xen-de...@lists.xenproject.org; Keir (Xen.org)
> Subject: Re: [PATCH v4 10/17] x86/hvm: revert 82ed8716b "fix direct PCI port
> I/O emulation retry...
>
>
>>> On 24.06.15 at 13:24, wrote:
> @@ -288,17 +272,66 @@ static int hvmemul_do_io_addr(
> bool_t is_mmio, paddr_t addr, unsigned long *reps,
> unsigned int size, uint8_t dir, bool_t df, paddr_t ram_gpa)
> {
> -struct page_info *ram_page;
> +struct vcpu *v = current;
> +unsig
...and error handling"
NOTE: A straight reversion was not possible because of subsequent changes
in the code so this at least partially a manual reversion.
By limiting hvmemul_do_io_addr() to reps falling within the pages on which
a reference has already been taken, we can guarantee that ca
