+ SECURITY UPDATE
* For most processors: SRBDS and/or VRDS, L1DCES mitigations depending
on the processor model
* For Skylake HEDT and Skylake Xeons with signature 0x50654: VRDS and
L1DCES mitigations, plus mitigations described earlier
* Expect some performance impact, the mitigations are enabled by
default. A Linux kernel update will be issued that allows one to
selectively disable the mitigations.
+ CRITICAL ERRATA FIXES
* Implements mitigation for CVE-2020-0543 Special Register Buffer Data
Sampling (SRBDS), INTEL-SA-00320, CROSSTalk
* Implements mitigation for CVE-2020-0548 Vector Register Data Sampling
(VRDS), INTEL-SA-00329
* Implements mitigation for CVE-2020-0549 L1D Cache Eviction Sampling
(L1DCES), INTEL-SA-00329
* Known to fix the regression introduced in release 2019-11-12 (sig
0x50564, rev. 0x2000065), which would cause several systems with
Skylake Xeon, Skylake HEDT processors to hang while rebooting
* Works around hangs on boot on Skylake-U/Y and Skylake Xeon E3
+ Updated Microcodes:
sig 0x000206d6, pf_mask 0x6d, 2020-03-04, rev 0x0621, size 18432
sig 0x000206d7, pf_mask 0x6d, 2020-03-24, rev 0x071a, size 19456
sig 0x000306c3, pf_mask 0x32, 2019-11-12, rev 0x0028, size 23552
sig 0x000306d4, pf_mask 0xc0, 2019-11-12, rev 0x002f, size 19456
sig 0x00040651, pf_mask 0x72, 2019-11-12, rev 0x0026, size 22528
sig 0x00040661, pf_mask 0x32, 2019-11-12, rev 0x001c, size 25600
sig 0x00040671, pf_mask 0x22, 2019-11-12, rev 0x0022, size 14336
sig 0x000406e3, pf_mask 0xc0, 2019-10-03, rev 0x00d6, size 101376
sig 0x00050653, pf_mask 0x97, 2020-04-24, rev 0x1000157, size 32768
sig 0x00050654, pf_mask 0xb7, 2020-04-24, rev 0x2006906, size 34816
sig 0x00050656, pf_mask 0xbf, 2020-04-23, rev 0x4002f01, size 52224
sig 0x00050657, pf_mask 0xbf, 2020-04-23, rev 0x5002f01, size 52224
sig 0x000506e3, pf_mask 0x36, 2019-10-03, rev 0x00d6, size 101376
sig 0x000706e5, pf_mask 0x80, 2020-03-12, rev 0x0078, size 107520
sig 0x000806e9, pf_mask 0x10, 2020-04-27, rev 0x00d6, size 103424
sig 0x000806e9, pf_mask 0xc0, 2020-04-27, rev 0x00d6, size 103424
sig 0x000806ea, pf_mask 0xc0, 2020-04-27, rev 0x00d6, size 103424
sig 0x000806eb, pf_mask 0xd0, 2020-04-27, rev 0x00d6, size 103424
sig 0x000806ec, pf_mask 0x94, 2020-04-23, rev 0x00d6, size 103424
sig 0x000906e9, pf_mask 0x2a, 2020-04-23, rev 0x00d6, size 103424
sig 0x000906ea, pf_mask 0x22, 2020-04-27, rev 0x00d6, size 102400
sig 0x000906eb, pf_mask 0x02, 2020-04-23, rev 0x00d6, size 103424
sig 0x000906ec, pf_mask 0x22, 2020-04-27, rev 0x00d6, size 102400
sig 0x000906ed, pf_mask 0x22, 2020-04-23, rev 0x00d6, size 103424
* Likely fixes several critical errata on IceLake-U/Y causing system
hangs
Signed-off-by: Zoltan HERPAI <[email protected]>