From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tianyu Lan Subject: [PATCH V3 0/4] KVM/x86/hyper-V: Introduce PV guest address space mapping flush support Date: Thu, 19 Jul 2018 08:39:59 +0000 Message-ID: <20180719083946.121493-1-Tianyu.Lan@microsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: Tianyu Lan , "devel@linuxdriverproject.org" , Haiyang Zhang , "hpa@zytor.com" , "kvm@vger.kernel.org" , KY Srinivasan , "linux-kernel@vger.kernel.org" , "mingo@redhat.com" , "pbonzini@redhat.com" , "rkrcmar@redhat.com" , Stephen Hemminger , "tglx@linutronix.de" , "x86@kernel.org" , "Michael Kelley (EOSG)" , "vkuznets@redhat.com" To: unlisted-recipients:; (no To-header on input) Return-path: Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Hyper-V provides a para-virtualization hypercall HvFlushGuestPhysicalAddres= sSpace to flush nested VM address space mapping in l1 hypervisor and it's to reduc= e overhead of flushing ept tlb among vcpus. The tradition way is to send IPIs to all a= ffected vcpus and executes INVEPT on each vcpus. It will trigger several vmexits fo= r IPI and INVEPT emulation. The pv hypercall can help to flush specified ept table on= all vcpus via one single hypercall. Change since v2: - Make ept_pointers_match as tristate "check", "match" and "mismatch= ". Set "check" in vmx_set_cr3(), check all ept table pointers in hv_rem= ote_flush_tlb() and call hypercall when all ept pointers are same. - Rename kvm_arch_hv_flush_remote_tlb with kvm_arch_flush_remote_tlb= and Rename kvm_x86_ops->hv_tlb_remote_flush with kvm_x86_ops->tlb_remote= _flush - Fix issue that ignore updating tlbs_dirty during calling kvm_arch_= flush_remote_tlbs() - Merge patch "KVM/VMX: Add identical ept table pointer check" and patch "KVM/x86: Add tlb_remote_flush callback support for vmx" Change since v1: - Fix compilation error for non-x86 platform. - Use ept_pointers_match to check condition of identical ept table pointer and get ept pointer from struct vcpu_vmx->ept_poi= nter. - Add hyperv_nested_flush_guest_mapping ftrace support =20 Lan Tianyu (4): X86/Hyper-V: Add flush HvFlushGuestPhysicalAddressSpace hypercall support X86/Hyper-V: Add hyperv_nested_flush_guest_mapping ftrace support KVM: Add tlb remote flush callback in kvm_x86_ops. KVM/x86: Add tlb_remote_flush callback support for vmx arch/x86/hyperv/Makefile | 2 +- arch/x86/hyperv/nested.c | 67 +++++++++++++++++++++++++++++++++= + arch/x86/include/asm/hyperv-tlfs.h | 8 +++++ arch/x86/include/asm/kvm_host.h | 11 ++++++ arch/x86/include/asm/mshyperv.h | 2 ++ arch/x86/include/asm/trace/hyperv.h | 14 ++++++++ arch/x86/kvm/vmx.c | 72 +++++++++++++++++++++++++++++++++= +++- include/linux/kvm_host.h | 7 ++++ virt/kvm/kvm_main.c | 3 +- 9 files changed, 183 insertions(+), 3 deletions(-) create mode 100644 arch/x86/hyperv/nested.c --=20 2.14.3