From: "Jan Beulich" <jbeulich@suse.com>
To: nmanthey@amazon.de
Cc: tim@xen.org, sstabellini@kernel.org, wei.liu2@citrix.com,
konrad.wilk@oracle.com, George.Dunlap@eu.citrix.com,
andrew.cooper3@citrix.com, Ian.Jackson@eu.citrix.com,
Dario Faggioli <dfaggioli@suse.com>,
mpohlack@amazon.de, julien.grall@arm.com, dwmw@amazon.co.uk,
amazein@amazon.de, xen-devel@lists.xenproject.org,
jsteckli@amazon.de, doebel@amazon.de
Subject: Re: [PATCH SpectreV1+L1TF v4 05/11] common/grant_table: block speculative out-of-bound accesses
Date: Tue, 29 Jan 2019 02:46:24 -0700 [thread overview]
Message-ID: <5C5020F0020000780014B7D1@prv1-mh.provo.novell.com> (raw)
In-Reply-To: <3eb3ecbb-47a7-386e-90ca-d49d8a75d3a6@amazon.de>
>>> Norbert Manthey <nmanthey@amazon.de> 01/29/19 9:35 AM >>>
>I am aware that both version use the same base array, and access it via
>different macros, which essentially partition the array based on the
>size of the respective struct. The underlying raw array has the same
>size for both version.
And this is the problem afaics: If a guest has requested its grant table to
be sized as a single page, this page can fit twice as many entries for
v1 than it can fit for v2. Hence the v1 grant reference pointing at the last
entry would point at the last entry in the (not mapped) second page for v2.
Jan
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next prev parent reply other threads:[~2019-01-29 9:46 UTC|newest]
Thread overview: 150+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-23 11:51 SpectreV1+L1TF Patch Series Norbert Manthey
2019-01-23 11:51 ` [PATCH SpectreV1+L1TF v4 01/11] is_control_domain: block speculation Norbert Manthey
2019-01-23 13:07 ` Jan Beulich
2019-01-23 13:20 ` Julien Grall
2019-01-23 13:40 ` Jan Beulich
2019-01-23 13:20 ` Jan Beulich
2019-01-24 12:07 ` Norbert Manthey
2019-01-24 20:33 ` Andrew Cooper
2019-01-25 9:19 ` Jan Beulich
2019-01-23 11:51 ` [PATCH SpectreV1+L1TF v4 02/11] is_hvm/pv_domain: " Norbert Manthey
2019-01-23 11:51 ` [PATCH SpectreV1+L1TF v4 03/11] config: introduce L1TF_LFENCE option Norbert Manthey
2019-01-23 13:18 ` Jan Beulich
2019-01-24 12:11 ` Norbert Manthey
2019-01-23 13:24 ` Julien Grall
2019-01-23 13:39 ` Jan Beulich
2019-01-23 13:44 ` Julien Grall
2019-01-23 14:45 ` Jan Beulich
2019-01-24 12:21 ` Norbert Manthey
2019-01-24 21:29 ` Andrew Cooper
2019-01-25 10:14 ` Jan Beulich
2019-01-25 10:50 ` Norbert Manthey
2019-01-25 13:09 ` Jan Beulich
2019-01-27 20:28 ` Norbert Manthey
2019-01-28 7:35 ` Jan Beulich
2019-01-28 7:56 ` Norbert Manthey
2019-01-28 8:24 ` Jan Beulich
2019-01-28 10:07 ` Norbert Manthey
2019-01-31 22:39 ` Andrew Cooper
2019-02-01 8:02 ` Jan Beulich
2019-01-23 11:51 ` [PATCH SpectreV1+L1TF v4 04/11] x86/hvm: block speculative out-of-bound accesses Norbert Manthey
2019-01-31 19:31 ` Andrew Cooper
2019-02-01 9:06 ` Jan Beulich
2019-01-23 11:51 ` [PATCH SpectreV1+L1TF v4 05/11] common/grant_table: " Norbert Manthey
2019-01-23 13:37 ` Jan Beulich
2019-01-28 14:45 ` Norbert Manthey
2019-01-28 15:09 ` Jan Beulich
2019-01-29 8:33 ` Norbert Manthey
2019-01-29 9:46 ` Jan Beulich [this message]
2019-01-29 13:47 ` Norbert Manthey
2019-01-29 15:11 ` Jan Beulich
2019-01-30 8:06 ` Norbert Manthey
2019-01-30 11:35 ` Jan Beulich
2019-01-23 11:51 ` [PATCH SpectreV1+L1TF v4 06/11] common/memory: " Norbert Manthey
2019-01-23 11:57 ` [PATCH SpectreV1+L1TF v4 07/11] nospec: enable lfence on Intel Norbert Manthey
2019-01-24 22:29 ` Andrew Cooper
2019-01-27 20:09 ` Norbert Manthey
2019-01-23 11:57 ` [PATCH SpectreV1+L1TF v4 08/11] xen/evtchn: block speculative out-of-bound accesses Norbert Manthey
2019-01-24 16:56 ` Jan Beulich
2019-01-24 19:50 ` Norbert Manthey
2019-01-25 9:23 ` Jan Beulich
2019-01-23 11:57 ` [PATCH SpectreV1+L1TF v4 09/11] x86/vioapic: " Norbert Manthey
2019-01-25 16:34 ` Jan Beulich
2019-01-28 11:03 ` Norbert Manthey
2019-01-28 11:12 ` Jan Beulich
2019-01-28 12:20 ` Norbert Manthey
2019-01-23 11:57 ` [PATCH SpectreV1+L1TF v4 10/11] x86/hvm/hpet: " Norbert Manthey
2019-01-25 16:50 ` Jan Beulich
2019-01-23 11:57 ` [PATCH SpectreV1+L1TF v4 11/11] x86/CPUID: " Norbert Manthey
2019-01-24 21:05 ` SpectreV1+L1TF Patch Series Andrew Cooper
2019-01-28 13:56 ` Norbert Manthey
2019-01-28 8:28 ` Jan Beulich
[not found] ` <5C4EBD1A0200007800211954@suse.com>
2019-01-28 8:47 ` Juergen Gross
2019-01-28 9:56 ` Jan Beulich
[not found] ` <9C03B9BA0200004637554D14@prv1-mh.provo.novell.com>
[not found] ` <00FAA7AF020000F8B1E090C7@prv1-mh.provo.novell.com>
[not found] ` <00FAE7AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-01-31 15:05 ` [PATCH SpectreV1+L1TF v5 1/9] xen/evtchn: block speculative out-of-bound accesses Jan Beulich
2019-02-01 13:45 ` Norbert Manthey
2019-02-01 14:08 ` Jan Beulich
2019-02-05 13:42 ` Norbert Manthey
[not found] ` <00FA27AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-01-31 16:05 ` [PATCH SpectreV1+L1TF v5 2/9] x86/vioapic: " Jan Beulich
2019-02-01 13:54 ` Norbert Manthey
[not found] ` <00F867AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-01-31 16:19 ` [PATCH SpectreV1+L1TF v5 3/9] x86/hvm: " Jan Beulich
2019-01-31 20:02 ` Andrew Cooper
2019-02-01 8:23 ` Jan Beulich
2019-02-01 14:06 ` Norbert Manthey
2019-02-01 14:31 ` Jan Beulich
2019-02-01 14:05 ` Norbert Manthey
[not found] ` <0101A7AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-01-31 16:35 ` [PATCH SpectreV1+L1TF v5 4/9] spec: add l1tf-barrier Jan Beulich
2019-02-05 14:23 ` Norbert Manthey
2019-02-05 14:43 ` Jan Beulich
2019-02-06 13:02 ` Norbert Manthey
2019-02-06 13:20 ` Jan Beulich
[not found] ` <0101E7AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-01-31 17:05 ` [PATCH SpectreV1+L1TF v5 5/9] nospec: introduce evaluate_nospec Jan Beulich
2019-02-05 14:32 ` Norbert Manthey
2019-02-08 13:44 ` SpectreV1+L1TF Patch Series v6 Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 1/9] xen/evtchn: block speculative out-of-bound accesses Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 2/9] x86/vioapic: " Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 3/9] x86/hvm: " Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 4/9] spec: add l1tf-barrier Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 5/9] nospec: introduce evaluate_nospec Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 6/9] is_control_domain: block speculation Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 7/9] is_hvm/pv_domain: " Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 8/9] common/grant_table: block speculative out-of-bound accesses Norbert Manthey
2019-02-08 13:44 ` [PATCH SpectreV1+L1TF v6 9/9] common/memory: " Norbert Manthey
2019-02-08 14:32 ` SpectreV1+L1TF Patch Series v6 Julien Grall
[not found] ` <A18FF6C80200006BB1E090C7@prv1-mh.provo.novell.com>
[not found] ` <01CCAAAF02000039B1E090C7@prv1-mh.provo.novell.com>
[not found] ` <01CCEAAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 13:08 ` [PATCH SpectreV1+L1TF v6 1/9] xen/evtchn: block speculative out-of-bound accesses Jan Beulich
2019-02-14 13:10 ` Norbert Manthey
2019-02-14 13:20 ` Jan Beulich
[not found] ` <01CC2AAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 13:16 ` [PATCH SpectreV1+L1TF v6 2/9] x86/vioapic: " Jan Beulich
2019-02-14 13:16 ` Norbert Manthey
[not found] ` <01CE6AAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 13:25 ` [PATCH SpectreV1+L1TF v6 3/9] x86/hvm: " Jan Beulich
2019-02-12 14:05 ` Norbert Manthey
2019-02-12 14:14 ` Jan Beulich
2019-02-15 8:05 ` Norbert Manthey
2019-02-15 8:55 ` Jan Beulich
2019-02-15 10:50 ` Norbert Manthey
2019-02-15 11:46 ` Jan Beulich
2019-02-18 14:47 ` Norbert Manthey
2019-02-18 15:56 ` Jan Beulich
[not found] ` <01CFAAAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 13:44 ` [PATCH SpectreV1+L1TF v6 4/9] spec: add l1tf-barrier Jan Beulich
2019-02-15 9:13 ` Norbert Manthey
[not found] ` <01CFEAAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 13:50 ` [PATCH SpectreV1+L1TF v6 5/9] nospec: introduce evaluate_nospec Jan Beulich
2019-02-14 13:37 ` Norbert Manthey
2019-02-12 14:12 ` Jan Beulich
2019-02-14 13:42 ` Norbert Manthey
[not found] ` <01CF2AAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 14:11 ` [PATCH SpectreV1+L1TF v6 6/9] is_control_domain: block speculation Jan Beulich
2019-02-14 13:45 ` Norbert Manthey
[not found] ` <23D9419E02000017B1E090C7@prv1-mh.provo.novell.com>
2019-02-12 14:31 ` [PATCH SpectreV1+L1TF v6 9/9] common/memory: block speculative out-of-bound accesses Jan Beulich
2019-02-14 14:04 ` Norbert Manthey
[not found] ` <01CEAAAF02000039B1E090C7@prv1-mh.provo.novell.com>
2019-02-13 11:50 ` [PATCH SpectreV1+L1TF v6 8/9] common/grant_table: " Jan Beulich
2019-02-15 9:55 ` Norbert Manthey
2019-02-15 10:34 ` Jan Beulich
2019-02-18 13:49 ` Norbert Manthey
2019-02-18 16:08 ` Jan Beulich
2019-02-19 21:47 ` Norbert Manthey
[not found] ` <0104A7AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-02-06 14:52 ` [PATCH SpectreV1+L1TF v5 " Jan Beulich
2019-02-06 15:06 ` Norbert Manthey
2019-02-06 15:53 ` Jan Beulich
2019-02-07 9:50 ` Norbert Manthey
2019-02-07 10:20 ` Norbert Manthey
2019-02-07 14:00 ` Jan Beulich
2019-02-07 16:20 ` Norbert Manthey
[not found] ` <010527AF020000F8B1E090C7@prv1-mh.provo.novell.com>
2019-02-06 15:03 ` [PATCH SpectreV1+L1TF v5 6/9] is_control_domain: block speculation Jan Beulich
2019-02-06 15:36 ` Norbert Manthey
2019-02-06 16:01 ` Jan Beulich
2019-02-07 10:02 ` Norbert Manthey
[not found] ` <20F3469E02000096B1E090C7@prv1-mh.provo.novell.com>
2019-02-06 15:25 ` [PATCH SpectreV1+L1TF v5 9/9] common/memory: block speculative out-of-bound accesses Jan Beulich
2019-02-06 15:39 ` Norbert Manthey
2019-02-06 16:08 ` Jan Beulich
2019-02-07 7:20 ` Norbert Manthey
2019-01-28 10:01 SpectreV1+L1TF Patch Series Juergen Gross
2019-01-29 14:43 ` SpectreV1+L1TF Patch Series v5 Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 1/9] xen/evtchn: block speculative out-of-bound accesses Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 2/9] x86/vioapic: " Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 3/9] x86/hvm: " Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 4/9] spec: add l1tf-barrier Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 5/9] nospec: introduce evaluate_nospec Norbert Manthey
2019-02-08 9:20 ` Julien Grall
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 6/9] is_control_domain: block speculation Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 7/9] is_hvm/pv_domain: " Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 8/9] common/grant_table: block speculative out-of-bound accesses Norbert Manthey
2019-01-29 14:43 ` [PATCH SpectreV1+L1TF v5 9/9] common/memory: " Norbert Manthey
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