Hello, The following series aims to improve the TLB flush times when running nested Xen, and it's specially beneficial when running in shim mode.
Only the HAP guest TLB flush is improved, the shadow paging TLB flush is left as-is, and can be improved later if there's interest. For a reference on the performance improvement see patch #7, as it's a huge increase which can benefit other guests using assisted TLB flushes, and also the ones using the viridian TLB flush assist (ie: Windows). Thanks, Roger. Roger Pau Monne (7): x86/tlb: fix NEED_FLUSH return type x86/hvm: allow ASID flush when v != current x86/paging: add TLB flush hooks x86/hap: improve hypervisor assisted guest TLB flush x86/tlb: introduce a flush guests TLB flag x86/tlb: allow disabling the TLB clock x86/tlb: use Xen L0 assisted TLB flush when available xen/arch/x86/flushtlb.c | 24 ++++++--- xen/arch/x86/guest/hypervisor.c | 10 ++++ xen/arch/x86/guest/xen/xen.c | 6 +++ xen/arch/x86/hvm/asid.c | 6 +-- xen/arch/x86/hvm/hvm.c | 51 ++---------------- xen/arch/x86/mm/hap/hap.c | 48 +++++++++++++++++ xen/arch/x86/mm/shadow/common.c | 71 +++++++++++++++++++++++--- xen/arch/x86/mm/shadow/hvm.c | 2 +- xen/arch/x86/mm/shadow/multi.c | 17 +++--- xen/arch/x86/smp.c | 11 ++++ xen/include/asm-x86/flushtlb.h | 21 +++++++- xen/include/asm-x86/guest/hypervisor.h | 17 ++++++ xen/include/asm-x86/hap.h | 3 ++ xen/include/asm-x86/shadow.h | 12 +++++ 14 files changed, 220 insertions(+), 79 deletions(-) -- 2.25.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
