linux-kernel - Re: [PATCH RFC v1 07/20] KVM: nVMX: Support the extended instruction info field

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

Message-ID: <CABgObfaF4YO0Zd5PKJ3u7kRB0engmsSywnzztV8BKm5yUyQdmQ@mail.gmail.com>
Date: Tue, 18 Nov 2025 00:29:19 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: Chao Gao <chao.gao@...el.com>
Cc: "Chang S. Bae" <chang.seok.bae@...el.com>, kvm <kvm@...r.kernel.org>, 
	"Kernel Mailing List, Linux" <linux-kernel@...r.kernel.org>, Sean Christopherson <seanjc@...gle.com>, 
	Zhao Liu <zhao1.liu@...el.com>
Subject: Re: [PATCH RFC v1 07/20] KVM: nVMX: Support the extended instruction
 info field

Il mer 12 nov 2025, 02:54 Chao Gao <chao.gao@...el.com> ha scritto:
>
> Shouldn't we check guest's capabilities rather than host's,
>
> i.e., guest_cpu_cap_has(X86_FEATURE_APX)?

As the manual says, you're free to use the extended field if
available, and it's faster.

Paolo