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From: Paolo Bonzini <pbonzini@redhat.com>
To: Don Slutz <don.slutz@gmail.com>, "Michael S. Tsirkin" <mst@redhat.com>
Cc: qemu-devel@nongnu.org, "Markus Armbruster" <armbru@redhat.com>,
	"Don Slutz" <dslutz@verizon.com>,
	"Luiz Capitulino" <lcapitulino@redhat.com>,
	"Anthony Liguori" <aliguori@amazon.com>,
	"Andreas Färber" <afaerber@suse.de>,
	"Richard Henderson" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [PATCH v8 8/8] vmport: Add VMware all ring hack
Date: Fri, 3 Jul 2015 15:50:19 +0200	[thread overview]
Message-ID: <5596931B.90306@redhat.com> (raw)
In-Reply-To: <5596893C.7020700@Gmail.com>



On 03/07/2015 15:08, Don Slutz wrote:
>>>
>> Creating it at the pc level and propagating makes code
>> messy but I'd go along with it if it made sense from
>> user's point of view, but it does not seem to make sense:
>> to me this looks more like a CPU feature than a machine property.
>> Or the property of the vmport rpc device that you created.
> 
> Well this is not a clear area.  It does look more like a CPU feature.  I
> went with a machine feature because that is where "vmport" currently is.

I think it should be a vmport property.

It would be cleaner to implement it using the MemTxAttrs mechanism, but
for KVM I'm afraid it would be too slow (and the slowness would affect
all I/O accesses, not just vmport ones, unless really ugly hacks are done).

Paolo

  reply	other threads:[~2015-07-04  9:48 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-23 23:39 [Qemu-devel] [PATCH v8 0/8] Add limited support of VMware's hyper-call rpc Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [PATCH v8 1/8] vmport: Switch to trace Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [BUGFIX][PATCH v8 2/8] vmport: Fix vmport_cmd_ram_size Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [PATCH v8 3/8] MAINTAINERS: add VMware port Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [PATCH v8 4/8] vmport_rpc: Add the object vmport_rpc Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [PATCH v8 5/8] vmport_rpc: Add limited support of VMware's hyper-call rpc Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [PATCH v8 7/8] vmport_rpc: Add migration Don Slutz
2015-06-23 23:39 ` [Qemu-devel] [PATCH v8 8/8] vmport: Add VMware all ring hack Don Slutz
2015-07-01  6:50   ` Michael S. Tsirkin
2015-07-03 13:08     ` Don Slutz
2015-07-03 13:50       ` Paolo Bonzini [this message]
2015-07-05  6:40         ` Michael S. Tsirkin
2015-07-29 15:25           ` Don Slutz
2015-06-30 18:16 ` [Qemu-devel] [ping][PATCH v8 0/8] Add limited support of VMware's hyper-call rpc Don Slutz
     [not found] ` <1435102773-3498-7-git-send-email-Don.Slutz@Gmail.com>
2015-07-02 14:11   ` [Qemu-devel] [PATCH v8 6/8] vmport_rpc: Add QMP access to vmport_rpc object Markus Armbruster
2015-07-03 16:53     ` Don Slutz
2015-07-03 17:56       ` Markus Armbruster
2015-07-03 21:26         ` Don Slutz
2015-07-04  7:00           ` Markus Armbruster

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