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Message-ID: <20140622091927.GA18167@minantech.com> Date: Sun, 22 Jun 2014 12:19:27 +0300 From: Gleb Natapov <gleb@...nel.org> To: Marcelo Tosatti <mtosatti@...hat.com> Cc: Tang Chen <tangchen@...fujitsu.com>, pbonzini@...hat.com, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, mgorman@...e.de, yinghai@...nel.org, isimatu.yasuaki@...fujitsu.com, guz.fnst@...fujitsu.com, laijs@...fujitsu.com, kvm@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org, linux-kernel@...r.kernel.org, Avi Kivity <avi.kivity@...il.com> Subject: Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm. On Fri, Jun 20, 2014 at 05:31:46PM -0300, Marcelo Tosatti wrote: > > > Same with the APIC access page. > > APIC page is always mapped into guest's APIC base address 0xfee00000. > > The way it works is that when vCPU accesses page at 0xfee00000 the access > > is translated to APIC access page physical address. CPU sees that access > > is for APIC page and generates APIC access exit instead of memory access. > > If address 0xfee00000 is not mapped by EPT then EPT violation exit will > > be generated instead, EPT mapping will be instantiated, access retired > > by a guest and this time will generate APIC access exit. > > Right, confused with the other APIC page which the CPU writes (the vAPIC page) > to. > That one is allocated with kmalloc. -- Gleb. -- 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/
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