linux-kernel - Re: [PATCH] KVM: selftests: Add back the missing check of MONITOR/MWAIT availability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <175089019569.722981.11608669112741473168.b4-ty@google.com>
Date: Wed, 25 Jun 2025 15:25:25 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	Zide Chen <zide.chen@...el.com>, Chenyi Qiang <chenyi.qiang@...el.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Xuelian Guo <xuelian.guo@...el.com>
Subject: Re: [PATCH] KVM: selftests: Add back the missing check of
 MONITOR/MWAIT availability

On Fri, 20 Jun 2025 14:22:18 +0800, Chenyi Qiang wrote:
> The revamp of monitor/mwait test missed the original check of feature
> availability [*]. If MONITOR/MWAIT is not supported or is disabled by
> IA32_MISC_ENABLE on the host, executing MONITOR or MWAIT instruction
> from guest doesn't cause monitor/mwait VM exits, but a #UD.
> 
> [*] https://lore.kernel.org/all/20240411210237.34646-1-zide.chen@intel.com/
> 
> [...]

Applied to kvm-x86 fixes, thanks!

[1/1] KVM: selftests: Add back the missing check of MONITOR/MWAIT availability
      https://github.com/kvm-x86/linux/commit/0048ca5e9945

--
https://github.com/kvm-x86/kvm-unit-tests/tree/next