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Date: Wed, 20 Jun 2012 09:28:49 -0500 From: sheng qiu <herbert1984106@...il.com> To: Mehul Chadha <mehulc87@...il.com> Cc: kvm <kvm@...r.kernel.org>, linux-kernel@...r.kernel.org Subject: Re: how to map a host virtual address (hva) to guest address space (gva/gpa/gfn) Thanks Mehul. On Tue, Jun 19, 2012 at 7:33 PM, Mehul Chadha <mehulc87@...il.com> wrote: > On Tue, Jun 19, 2012 at 6:09 PM, sheng qiu <herbert1984106@...il.com> wrote: >> Hi all, >> >> is there any existing function in KVM that can map a host virtual >> address (hva) to the guest address space. So that the guest VM can >> access it. >> i.e. translate hva to a gpa or gva or gfn, so the guest VM can use >> that converted address to access? > I am not aware of a function that exists in kvm, but you can write one using > __gfn_to_memslot() as a reference implementation. > > you can check if the hva falls in a particular memslot using > userspace_addr member > of the memslot structure, and then calculate the corresponding gfn from that. >> >> Thanks, >> Sheng >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@...r.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- Sheng Qiu Texas A & M University Room 332B Wisenbaker email: herbert1984106@...il.com College Station, TX 77843-3259 -- 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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