From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 203543] Starting with kernel 5.1.0-rc6, kvm_intel can no longer be loaded in nested kvm/guests
Date: Wed, 08 May 2019 22:14:24 +0000 [thread overview]
Message-ID: <bug-203543-28872-mCpNTawwAw@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-203543-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=203543
--- Comment #8 from Liran Alon (liran.alon@oracle.com) ---
+Paolo
What are your thoughts on this?
What is the reason that KVM relies on CPU_BASED_RDPMC_EXITING to be exposed
from underlying CPU? How is it critical for it’s functionality?
If it’s because we want to make sure that we hide host PMCs, we should
condition this to be a min requirement of kvm_intel only in case underlying CPU
exposes PMU to begin with.
Do you agree? If yes, I can create the patch to fix this.
-Liran
> On 8 May 2019, at 16:51, bugzilla-daemon@bugzilla.kernel.org wrote:
>
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.kernel.org_show-5Fbug.cgi-3Fid-3D203543&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=Jk6Q8nNzkQ6LJ6g42qARkg6ryIDGQr-yKXPNGZbpTx0&m=7TirfLMNxYI-3Ygxm3kjDUB49Jwmk8bqD7671wy0hi8&s=Z_L1UqH19zon0ohDrCMU91ixA-Wn_vO7d-fO8s2G3PI&e=
>
> --- Comment #5 from David Hill (hilld@binarystorm.net) ---
> I can confirm that reverting that commit solves the problem:
>
> e51bfdb68725 ("KVM: nVMX: Expose RDPMC-exiting only when guest supports PMU”)
>
> --
> You are receiving this mail because:
> You are watching the assignee of the bug.
--
You are receiving this mail because:
You are watching the assignee of the bug.
next prev parent reply other threads:[~2019-05-08 22:14 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-07 20:45 [Bug 203543] New: Starting with kernel 5.1.0-rc6, kvm_intel can no longer be loaded in nested kvm/guests bugzilla-daemon
2019-05-07 23:23 ` Liran Alon
2019-05-07 23:29 ` [Bug 203543] " bugzilla-daemon
2019-05-08 4:08 ` bugzilla-daemon
2019-05-08 12:44 ` bugzilla-daemon
2019-05-08 12:46 ` bugzilla-daemon
2019-05-08 13:51 ` bugzilla-daemon
2019-05-08 16:00 ` Liran Alon
2019-05-08 16:21 ` Sean Christopherson
2019-05-08 16:10 ` bugzilla-daemon
2019-05-08 16:29 ` bugzilla-daemon
2019-05-08 22:14 ` bugzilla-daemon [this message]
2019-05-21 12:57 ` David Hill
2019-05-21 12:57 ` bugzilla-daemon
2019-05-21 13:37 ` bugzilla-daemon
2019-05-21 14:11 ` Sean Christopherson
2019-05-21 14:17 ` Sean Christopherson
2019-05-21 14:17 ` bugzilla-daemon
2019-05-21 14:18 ` bugzilla-daemon
2019-05-21 16:02 ` bugzilla-daemon
2019-05-21 18:06 ` bugzilla-daemon
2019-05-26 12:11 ` David Hill
2019-05-26 12:11 ` bugzilla-daemon
2019-12-01 18:07 ` bugzilla-daemon
2019-12-01 21:49 ` bugzilla-daemon
2019-12-02 3:20 ` bugzilla-daemon
2019-12-02 3:42 ` bugzilla-daemon
2019-12-02 4:15 ` bugzilla-daemon
2019-12-02 4:27 ` bugzilla-daemon
2019-12-02 4:44 ` bugzilla-daemon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-203543-28872-mCpNTawwAw@https.bugzilla.kernel.org/ \
--to=bugzilla-daemon@bugzilla.kernel.org \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).