linux-kernel - Re: [KVM TSC trapping / migration 1/2] Add TSC trapping for SVM and VMX

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]

Date:	Mon, 10 Jan 2011 12:52:36 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Zachary Amsden <zamsden@...hat.com>
Cc:	kvm@...r.kernel.org, Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Glauber Costa <glommer@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [KVM TSC trapping / migration 1/2] Add TSC trapping for SVM
	and VMX

On Thu, Jan 06, 2011 at 12:10:44AM -1000, Zachary Amsden wrote:
> +static void svm_set_tsc_trapping(struct kvm_vcpu *vcpu, bool trap)
> +{
> +	struct vcpu_svm *svm = to_svm(vcpu);
> +	if (trap)
> +		svm->vmcb->control.intercept |= 1ULL << INTERCEPT_RDTSC;
> +	else
> +		svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_RDTSC);
> +}

This needs to update the clean-bits. Please use
set_intercept/clr_intercept instead which already takes care of this.

	Joerg

--
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/