On 09/24/2014 04:20 PM, Paolo Bonzini wrote:
Il 24/09/2014 09:57, Tang Chen ha scritto:ept identity pagetable and apic access page in kvm are pinned in memory. As a result, they cannot be migrated/hot-removed. But actually they don't need to be pinned in memory. [For ept identity page] Just do not pin it. When it is migrated, guest will be able to find the new page in the next ept violation. [For apic access page] The hpa of apic access page is stored in VMCS APIC_ACCESS_ADDR pointer. When apic access page is migrated, we update VMCS APIC_ACCESS_ADDR pointer for each vcpu in addition. This patch-set is based on Linux 3.17.0-rc5. NOTE: Tested with -cpu xxx,-x2apic option. But since nested vm pins some other pages in memory, if user uses nested vm, memory hot-remove will not work. Change log v7->v8: 1. Patch 1/9~3/9 were applied to kvm/queue by Paolo Bonzini <pbonzini@xxxxxxxxxx>. Just resend them, no changes. 2. Removed previous patch 4/9, which added unnecessary hook has_secondary_apic_access(). 3. Set kvm_x86_ops->set_apic_access_page_addr to NULL when hardware had no flexpriority functionality which actually exists only on x86. 4. Moved declaration of kvm_arch_mmu_notifier_invalidate_page() to arch/*/include/asm/kvm_host.h. 5. Removed useless set_apic_access_page_addr() hook for svm. Tang Chen (8): kvm: Use APIC_DEFAULT_PHYS_BASE macro as the apic access page address. kvm: Remove ept_identity_pagetable from struct kvm_arch. kvm: Make init_rmode_identity_map() return 0 on success. kvm, mem-hotplug: Reload L1's apic access page in vcpu_enter_guest(). kvm: Rename make_all_cpus_request() to kvm_make_all_cpus_request() and make it non-static. kvm, mem-hotplug: Reload L1's apic access page on migration when L2 is running. kvm, mem-hotplug: Add arch specific mmu notifier to handle apic access migration. kvm, mem-hotplug: Unpin and remove kvm_arch->apic_access_page. arch/arm/include/asm/kvm_host.h | 5 ++ arch/arm64/include/asm/kvm_host.h | 5 ++ arch/ia64/include/asm/kvm_host.h | 7 ++ arch/mips/include/asm/kvm_host.h | 6 ++ arch/powerpc/include/asm/kvm_host.h | 5 ++ arch/s390/include/asm/kvm_host.h | 8 +++ arch/x86/include/asm/kvm_host.h | 7 +- arch/x86/kvm/svm.c | 3 +- arch/x86/kvm/vmx.c | 130 ++++++++++++++++++++++++------------ arch/x86/kvm/x86.c | 45 +++++++++++-- include/linux/kvm_host.h | 2 + virt/kvm/kvm_main.c | 13 ++-- 12 files changed, 180 insertions(+), 56 deletions(-)Thanks for your persistence! The patches look good, I'll test them and apply to kvm/queue.
Sure, thank you very much. :) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
