From: Tim Deegan <tim@xen.org>
To: Jan Beulich <jbeulich@suse.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>,
"George Dunlap" <george.dunlap@citrix.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Jun Nakajima" <jun.nakajima@intel.com>
Subject: Re: [PATCH v4 1/3] VMX: use a single, global APIC access page
Date: Mon, 26 Apr 2021 18:53:38 +0100 [thread overview]
Message-ID: <YIb+Iky2sQuoubxR@deinos.phlegethon.org> (raw)
In-Reply-To: <837a427a-a74e-00e9-70c7-1d3cfa28b30c@suse.com>
At 12:52 +0200 on 23 Apr (1619182377), Jan Beulich wrote:
> The address of this page is used by the CPU only to recognize when to
> access the virtual APIC page instead. No accesses would ever go to this
> page. It only needs to be present in the (CPU) page tables so that
> address translation will produce its address as result for respective
> accesses.
>
> By making this page global, we also eliminate the need to refcount it,
> or to assign it to any domain in the first place.
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
Looks good, thanks for the changes!
Acked-by: Tim Deegan <tim@xen.org>
next prev parent reply other threads:[~2021-04-26 17:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 10:55 [PATCH v3 0/2] VMX: apic access page handling adjustments Jan Beulich
2021-02-22 10:56 ` [PATCH v3 1/2][4.15] VMX: delay p2m insertion of APIC access page Jan Beulich
2021-02-22 11:25 ` Ian Jackson
2021-02-22 14:05 ` Jan Beulich
2021-02-22 17:17 ` Ian Jackson
2021-02-22 12:15 ` Roger Pau Monné
2021-02-25 8:44 ` Jan Beulich
2021-02-26 7:06 ` Tian, Kevin
2021-02-22 10:57 ` [PATCH v3 2/2] VMX: use a single, global " Jan Beulich
2021-03-01 2:34 ` Tian, Kevin
2021-03-01 8:18 ` Jan Beulich
2021-04-12 10:40 ` [PATCH v4] " Jan Beulich
2021-04-12 15:31 ` Roger Pau Monné
2021-04-13 9:24 ` Jan Beulich
2021-04-13 10:18 ` Roger Pau Monné
2021-04-13 12:03 ` Jan Beulich
2021-04-13 13:03 ` Roger Pau Monné
2021-04-17 19:24 ` Tim Deegan
2021-04-19 11:25 ` Jan Beulich
2021-04-22 7:42 ` Tim Deegan
2021-04-22 9:38 ` Jan Beulich
2021-04-22 15:05 ` Tim Deegan
2021-04-23 10:51 ` [PATCH v4 0/3] VMX APIC access page and shadow adjustments Jan Beulich
2021-04-23 10:52 ` [PATCH v4 1/3] VMX: use a single, global APIC access page Jan Beulich
2021-04-23 14:17 ` Roger Pau Monné
2021-04-23 14:42 ` Jan Beulich
2021-04-26 17:55 ` Tim Deegan
2021-04-25 1:27 ` Tian, Kevin
2021-04-26 17:53 ` Tim Deegan [this message]
2021-04-23 10:53 ` [PATCH v4 2/3] x86/shadow: re-use variables in shadow_get_page_from_l1e() Jan Beulich
2021-04-23 10:54 ` [PATCH v4 3/3] x86/shadow: streamline shadow_get_page_from_l1e() Jan Beulich
2021-04-23 11:00 ` Really v5 (was: [PATCH v4 0/3] VMX APIC access page and shadow adjustments) Jan Beulich
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