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[34.125.139.61]) by smtp.gmail.com with ESMTPSA id g15-20020a62f94f000000b006e657c72cf8sm366183pfm.148.2024.03.06.16.43.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Mar 2024 16:43:54 -0800 (PST) Date: Wed, 6 Mar 2024 16:43:51 -0800 From: David Matlack To: isaku.yamahata@intel.com Cc: kvm@vger.kernel.org, isaku.yamahata@gmail.com, linux-kernel@vger.kernel.org, Sean Christopherson , Paolo Bonzini , Michael Roth , Federico Parola Subject: Re: [RFC PATCH 1/8] KVM: Document KVM_MAP_MEMORY ioctl Message-ID: References: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On 2024-03-01 09:28 AM, isaku.yamahata@intel.com wrote: > From: Isaku Yamahata > + > + struct kvm_memory_mapping { > + __u64 base_gfn; > + __u64 nr_pages; > + __u64 flags; > + __u64 source; > + }; > + > + /* For kvm_memory_mapping:: flags */ > + #define KVM_MEMORY_MAPPING_FLAG_WRITE _BITULL(0) > + #define KVM_MEMORY_MAPPING_FLAG_EXEC _BITULL(1) > + #define KVM_MEMORY_MAPPING_FLAG_USER _BITULL(2) > + #define KVM_MEMORY_MAPPING_FLAG_PRIVATE _BITULL(3) > + > +KVM_MAP_MEMORY populates guest memory in the underlying mapping. If source is > +not zero and it's supported (depending on underlying technology), the guest > +memory content is populated with the source. What does "populated with the source" mean? > The flags field supports three > +flags: KVM_MEMORY_MAPPING_FLAG_WRITE, KVM_MEMORY_MAPPING_FLAG_EXEC, and > +KVM_MEMORY_MAPPING_FLAG_USER. There are 4 flags.