RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1450396 - Add support for AMD EPYC processors
Summary: Add support for AMD EPYC processors
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.4
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Eduardo Habkost
QA Contact: Guo, Zhiyi
URL:
Whiteboard:
Depends On: 1445834 1481252 1524824
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-05-12 12:29 UTC by Paolo Bonzini
Modified: 2018-04-10 14:32 UTC (History)
16 users (show)

Fixed In Version: qemu-kvm-1.5.3-146.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1445834
Environment:
Last Closed: 2018-04-10 14:32:19 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0816 0 normal SHIPPED_LIVE Low: qemu-kvm security, bug fix, and enhancement update 2018-04-10 12:47:03 UTC

Comment 1 Eduardo Habkost 2017-10-05 21:15:00 UTC 
Upstream commit:

commit 2e2efc7dbe2b0adc1200b5aa286cdbed729f6751
Author: Brijesh Singh <brijesh.singh>
Date:   Tue Aug 15 12:00:51 2017 -0500

    target-i386/cpu: Add new EPYC CPU model
    
    Add a new base CPU model called 'EPYC' to model processors from AMD EPYC
    family (which includes EPYC 76xx,75xx,74xx, 73xx and 72xx).
    
    The following features bits have been added/removed compare to Opteron_G5
    
    Added: monitor, movbe, rdrand, mmxext, ffxsr, rdtscp, cr8legacy, osvw,
           fsgsbase, bmi1, avx2, smep, bmi2, rdseed, adx, smap, clfshopt, sha
           xsaveopt, xsavec, xgetbv1, arat
    
    Removed: xop, fma4, tbm
    
    Cc: Paolo Bonzini <pbonzini>
    Cc: Richard Henderson <rth>
    Cc: Eduardo Habkost <ehabkost>
    Cc: Tom Lendacky <Thomas.Lendacky>
    Signed-off-by: Brijesh Singh <brijesh.singh>
    Message-Id: <20170815170051.127257-1-brijesh.singh>
    Reviewed-by: Eduardo Habkost <ehabkost>
    Signed-off-by: Eduardo Habkost <ehabkost>
Comment 2 Miroslav Rezanina 2017-10-24 04:40:28 UTC 
Fix included in qemu-kvm-1.5.3-146.el7
Comment 6 Eduardo Habkost 2017-12-07 16:43:24 UTC 
The monitor/svm warnings and the lack of x2apic may be real issues, depending on the how the compat code on qemu-kvm-rhev works, thanks for catching it!  This happens because qemu-kvm-1.5.3 doesn't have a mechanism for automatically disabling/enabling features when in KVM mode.  I will work on a fix.

However, this doesn't prevent the CPU model from being used, so I suggest verifying this BZ and opening a new one that's not a FutureFeature BZ.
Comment 7 Guo, Zhiyi 2017-12-08 01:50:07 UTC 
Verified per comment 4, 6
Comment 11 errata-xmlrpc 2018-04-10 14:32:19 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:0816
Note You need to log in before you can comment on or make changes to this bug.