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Tsirkin" , Alex Williamson , Sean Christopherson , "Dr . David Alan Gilbert" , Jason Wang , Kevin Tian , Paolo Bonzini , Christophe de Dinechin Subject: [PATCH v5 02/14] KVM: Cache as_id in kvm_memory_slot Date: Wed, 4 Mar 2020 12:49:35 -0500 Message-Id: <20200304174947.69595-3-peterx@redhat.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200304174947.69595-1-peterx@redhat.com> References: <20200304174947.69595-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Cache the address space ID just like the slot ID. It will be used in order to fill in the dirty ring entries. Suggested-by: Paolo Bonzini Suggested-by: Sean Christopherson Signed-off-by: Peter Xu --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index bcb9b2ac0791..afa0e9034881 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -346,6 +346,7 @@ struct kvm_memory_slot { unsigned long userspace_addr; u32 flags; short id; + u8 as_id; }; static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 70f03ce0e5c1..e6484dabfc59 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1036,6 +1036,8 @@ int __kvm_set_memory_region(struct kvm *kvm, new = old = *slot; + BUILD_BUG_ON(U8_MAX < KVM_ADDRESS_SPACE_NUM); + new.as_id = as_id; new.id = id; new.base_gfn = base_gfn; new.npages = npages; -- 2.24.1