linux-kernel - Re: [PATCH 4/4] x86: properly handle kvm emulation of hyperv

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: <51EE664E.9020203@redhat.com>
Date:	Tue, 23 Jul 2013 13:17:34 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Jason Wang <jasowang@...hat.com>
CC:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, gleb@...hat.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"K. Y. Srinivasan" <kys@...rosoft.com>
Subject: Re: [PATCH 4/4] x86: properly handle kvm emulation of hyperv

Il 23/07/2013 11:41, Jason Wang ha scritto:
> Recent kvm has some basic support of hyperv, this will cause the guest to
> identify itself as running on top of hyperv instead of kvm which will disable
> kvm pv functionality. This is because we try to detect hyperv before kvm. Solve
> this by simply checking kvm in detect_hypervisor() first.
> 
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: x86@...nel.org
> Cc: Gleb Natapov <gleb@...hat.com>
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: K. Y. Srinivasan <kys@...rosoft.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
>  arch/x86/kernel/cpu/hypervisor.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
> index 8727921..3e149b6 100644
> --- a/arch/x86/kernel/cpu/hypervisor.c
> +++ b/arch/x86/kernel/cpu/hypervisor.c
> @@ -36,10 +36,10 @@ static const __initconst struct hypervisor_x86 * const hypervisors[] =
>  	&x86_hyper_xen_hvm,
>  #endif
>  	&x86_hyper_vmware,
> -	&x86_hyper_ms_hyperv,
>  #ifdef CONFIG_KVM_GUEST
>  	&x86_hyper_kvm,
>  #endif
> +	&x86_hyper_ms_hyperv,
>  };
>  
>  const struct hypervisor_x86 *x86_hyper;
> 

Acked-by: Paolo Bonzini <pbonzini@...hat.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/