On 3/10/20 9:53 AM, Michael Reifenberger wrote: > Author: mr > Date: Tue Mar 10 16:53:49 2020 > New Revision: 358848 > URL: https://svnweb.freebsd.org/changeset/base/358848 > > Log: > Untangle TPR shadowing and APIC virtualization. > This speeds up Windows guests tremendously. > > The patch does: > Add a new tuneable 'hw.vmm.vmx.use_tpr_shadowing' to disable TLP shadowing. > Also add 'hw.vmm.vmx.cap.tpr_shadowing' to be able to query if TPR > shadowing is used. > > Detach the initialization of TPR shadowing from the initialization of APIC > virtualization. > APIC virtualization still needs TPR shadowing, but not vice versa. > Any CPU that supports APIC virtualization should also support TPR shadowing. > > When TPR shadowing is used, the APIC page of each vCPU is written to the > VMCS_VIRTUAL_APIC field of the VMCS > so that the CPU can write directly to the page without intercept. > > On vm exit, vlapic_update_ppr() is called to update the PPR. > > Submitted by: Yamagi Burmeister > MFC after: 2 weeks > Differential Revision: https://reviews.freebsd.org/D22942
Reviewed by: grehan Also, it is still good form to wrap the commit logs to fit in 80 cols. -- John Baldwin _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
