From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Jan Beulich <JBeulich@suse.com>,
Paul Durrant <paul.durrant@citrix.com>,
Roger Pau Monne <roger.pau@citrix.com>
Cc: xen-devel@lists.xenproject.org
Subject: Re: [PATCH 5/5] x86/HVM: don't setup an intercept handler for IO port 0xcf8 unconditionally
Date: Wed, 13 Jan 2016 16:45:20 +0000 [thread overview]
Message-ID: <56967F20.1010800@citrix.com> (raw)
In-Reply-To: <56968BA902000078000C66BF@prv-mh.provo.novell.com>
On 13/01/16 16:38, Jan Beulich wrote:
>>>> On 13.01.16 at 13:32, <roger.pau@citrix.com> wrote:
>> Only intercept accesses to IO port 0xcf8 if there's at least one IOREQ
>> server, otherwise it makes no sense since the only code that uses the value
>> stored by hvm_access_cf8 is the IOREQ server.
> Afaict an ioreq server could also attach subsequently - Paul?
Indeed it can.
The last-latched cfc/cf8 values should be accurate at that point. The
intercept needs to stay.
~Andrew
next prev parent reply other threads:[~2016-01-13 16:46 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-13 12:32 [PATCH 0/5] HVMlite: minor fixes and Dom0 preparatory patches Roger Pau Monne
2016-01-13 12:32 ` [PATCH 1/5] xen/elfnotes: initialise phys_entry to UNSET_ADDR32 Roger Pau Monne
2016-01-13 12:46 ` Jan Beulich
2016-01-13 12:52 ` Roger Pau Monné
2016-01-13 13:02 ` Jan Beulich
2016-01-13 13:05 ` Andrew Cooper
2016-01-13 13:08 ` Jan Beulich
2016-01-13 13:10 ` Andrew Cooper
2016-01-13 12:32 ` [PATCH 2/5] libelf: rewrite symtab/strtab loading for Dom0 Roger Pau Monne
2016-01-13 12:32 ` [PATCH 3/5] x86/hvm: don't set the BSP as initialised in hvm_vcpu_initialise Roger Pau Monne
2016-01-13 16:29 ` Jan Beulich
2016-01-13 17:23 ` Roger Pau Monné
2016-01-14 9:07 ` Jan Beulich
2016-01-13 12:32 ` [PATCH 4/5] x86/PV: remove the emulated PIT Roger Pau Monne
2016-01-13 16:36 ` Jan Beulich
2016-01-14 8:25 ` Roger Pau Monné
2016-01-14 9:11 ` Jan Beulich
2016-01-14 10:59 ` Roger Pau Monné
2016-01-14 12:38 ` Jan Beulich
2016-01-14 14:03 ` Roger Pau Monné
2016-01-14 14:36 ` Jan Beulich
2016-01-13 12:32 ` [PATCH 5/5] x86/HVM: don't setup an intercept handler for IO port 0xcf8 unconditionally Roger Pau Monne
2016-01-13 16:38 ` Jan Beulich
2016-01-13 16:45 ` Andrew Cooper [this message]
2016-01-13 16:48 ` Paul Durrant
2016-01-14 8:35 ` Roger Pau Monné
2016-01-14 9:12 ` Jan Beulich
2016-01-14 10:50 ` Andrew Cooper
2016-01-14 11:00 ` Roger Pau Monné
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