On 15/04/20 22:34, Sean Christopherson wrote: > Patches 4-5 are the focus of this series, adding caching of > vmcs.EXIT_QUALIFICATION and proper caching of vmcs.INTR_INFO (instead of > caching it with ad hoc rules about when it's available). Patches 1-3 > are prep work to clean up the register caching to ensure correctness when > switching between vmcs01 and vmcs02. > > The idea for this came about when working on the "unionize exit_reason" > series. The nested VM-Exit logic looks at both fields multiple times, > which is ok-ish when everything is crammed into one or two functions, but > incurs multiple VMREADs when split up. I really didn't want to solve that > issue by piling on more cases where vmx->exit_intr_info would be valid, or > by duplicating that fragile pattern for exit_qualification. > > Paolo, this will conflict with the "unionize exit_reason" series, though > the conflict resolution is all mechnical in nature. Let me know if you > want me to respin one on top of the other, send a single series, etc... Queued, I think I fixed the conflicts right. We'll see if anything explodes when I test it. :) Paolo > > Sean Christopherson (5): > KVM: nVMX: Invoke ept_save_pdptrs() if and only if PAE paging is > enabled > KVM: nVMX: Reset register cache (available and dirty masks) on VMCS > switch > KVM: nVMX: Drop manual clearing of segment cache on nested VMCS switch > KVM: VMX: Cache vmcs.EXIT_QUALIFICATION using arch avail_reg flags > KVM: VMX: Cache vmcs.EXIT_INTR_INFO using arch avail_reg flags > > arch/x86/include/asm/kvm_host.h | 2 + > arch/x86/kvm/vmx/nested.c | 29 +++++++------ > arch/x86/kvm/vmx/nested.h | 4 +- > arch/x86/kvm/vmx/vmx.c | 73 ++++++++++++++++----------------- > arch/x86/kvm/vmx/vmx.h | 35 +++++++++++++++- > 5 files changed, 86 insertions(+), 57 deletions(-) >
