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bh=77VLJhO0dwLBle+8mUKiXvGfN/pazGch3mXeBUAPVPY=; b=lOSb1jh+bt4haey43HIMtwFGaW08ydiHmgjk3xxfbBWGiMNXQk23xbiaUrYp90mvplWzPC 2cHavs6VQEbZKGtynRweI+uHTVpXwFpzR2Lgv9R4Cva7Z+lS7RngC04mX3HhMe13k7ZmiS JrnB9euVlgqs+68jIwsnpPYeoeI8Eik= Date: Thu, 22 Dec 2022 13:26:25 +0100 From: Borislav Petkov To: Michael Roth Cc: kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, linux-crypto@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, jroedel@suse.de, thomas.lendacky@amd.com, hpa@zytor.com, ardb@kernel.org, pbonzini@redhat.com, seanjc@google.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, luto@kernel.org, dave.hansen@linux.intel.com, slp@redhat.com, pgonda@google.com, peterz@infradead.org, srinivas.pandruvada@linux.intel.com, rientjes@google.com, dovmurik@linux.ibm.com, tobin@ibm.com, vbabka@suse.cz, kirill@shutemov.name, ak@linux.intel.com, tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com, alpergun@google.com, dgilbert@redhat.com, jarkko@kernel.org, ashish.kalra@amd.com, harald@profian.com Subject: Re: [PATCH RFC v7 02/64] KVM: x86: Add KVM_CAP_UNMAPPED_PRIVATE_MEMORY Message-ID: References: <20221214194056.161492-1-michael.roth@amd.com> <20221214194056.161492-3-michael.roth@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20221214194056.161492-3-michael.roth@amd.com> X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 7CBEB140014 X-Stat-Signature: fdf7mjdohwa77rh831dhi8jrn967k5mr X-HE-Tag: 1671711993-831942 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Dec 14, 2022 at 01:39:54PM -0600, Michael Roth wrote: > This mainly indicates to KVM that it should expect all private guest > memory to be backed by private memslots. Ideally this would work > similarly for others archs, give or take a few additional flags, but > for now it's a simple boolean indicator for x86. ... > diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h > index c7e9d375a902..cc9424ccf9b2 100644 > --- a/include/uapi/linux/kvm.h > +++ b/include/uapi/linux/kvm.h > @@ -1219,6 +1219,7 @@ struct kvm_ppc_resize_hpt { > #define KVM_CAP_DIRTY_LOG_RING_ACQ_REL 223 > #define KVM_CAP_S390_PROTECTED_ASYNC_DISABLE 224 > #define KVM_CAP_MEMORY_ATTRIBUTES 225 > +#define KVM_CAP_UNMAPPED_PRIVATE_MEM 240 Isn't this new cap supposed to be documented somewhere in Documentation/virt/kvm/api.rst ? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette