linux-kernel - Re: [PATCH v3] X86/VMX: Disable VMX preemption timer if MWAIT is not intercepted

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: <f78ae17f-1ae9-6e37-c294-a158cbdeeecd@redhat.com>
Date:   Tue, 10 Apr 2018 14:46:58 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     KarimAllah Ahmed <karahmed@...zon.de>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Radim Krčmář <rkrcmar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: Re: [PATCH v3] X86/VMX: Disable VMX preemption timer if MWAIT is not
 intercepted

On 10/04/2018 14:15, KarimAllah Ahmed wrote:
> So disable the VMX-preemption timer if MWAIT is exposed to the guest!
> 
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: Radim Krčmář <rkrcmar@...hat.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: H. Peter Anvin <hpa@...or.com>
> Cc: x86@...nel.org
> Cc: kvm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: KarimAllah Ahmed <karahmed@...zon.de>
> ---
> v2 -> v3:
> - return -EOPNOTSUPP before any other operation in vmx_set_hv_timer

Applied with s/kvm_pause_in_guest/kvm_mwait_in_guest/ and

Fixes: 4d5422cea3b61f158d58924cbb43feada456ba5c

to help stable maintainers.

Thanks,

Paolo