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Peter Anvin" , Paolo Bonzini , Jonathan Corbet , Jim Mattson , Wanpeng Li , "open list:KERNEL SELFTEST FRAMEWORK" , Vitaly Kuznetsov , Marcelo Tosatti , Sean Christopherson , open list , Ingo Molnar , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Joerg Roedel , Borislav Petkov , Shuah Khan , Andrew Jones , Oliver Upton , "open list:DOCUMENTATION" Subject: Re: [PATCH v2 1/3] KVM: x86: implement KVM_{GET|SET}_TSC_STATE Message-ID: <20201208093535.GS2414@hirez.programming.kicks-ass.net> References: <20201203171118.372391-1-mlevitsk@redhat.com> <20201203171118.372391-2-mlevitsk@redhat.com> <87a6uq9abf.fsf@nanos.tec.linutronix.de> <1dbbeefc7c76c259b55582468ccd3aab35a6de60.camel@redhat.com> <87a6up606r.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87a6up606r.fsf@nanos.tec.linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 07, 2020 at 05:38:36PM +0100, Thomas Gleixner wrote: > For anything halfways modern the write to TSC is reflected in TSC_ADJUST > which means you get the precise offset. IIRC this is true for everything that has TSC_ADJUST.