commit 068a77b8cef786dbd156738965090790c7c02719 Author: Matthew Dillon <dil...@backplane.com> Date: Mon Oct 10 10:22:12 2016 -0700
vkernel - Fix FP corruption in VMX/EPT mode * Properly invalidating the EPT TLB cache when it potentially becomes stale. * When destroying a VMX context, make sure the EPT TLB cache has been invalidated for that context as a safety. * Fix a bug in vmx_vminit() where it was losing track of the currently loaded VMX. * Setup the VMX to clear the host CR0_TS, and the host makes sure the FP state is correct prior to vmlaunch. * Make sure the GUEST_CR0's CR0_TS reflects the vkernel says it should reflect. * The vkernel has a choice of asking the guest user context to #NM fault on FP use or not. Both mechanics work, but its probably better for it to ensure that the FP state is valid and tell the user context to not fault. However, this commit makes sure that both mechanics work. * Document why we shouldn't vmclear the old current context when loading a different context. * Cleanup some of the vkernel's pmap handling. This isn't perfect and probably needs to be rewritten (we need a more powerful guest pmap adjustment system call to properly synchronize changes). For now we try to avoid races against detecting the (M)odified flag by clearing the RW flag first. Summary of changes: sys/platform/pc64/vmm/vmx.c | 131 ++++++++++++++++++--------- sys/platform/pc64/vmm/vmx.h | 2 + sys/platform/vkernel64/platform/pmap.c | 7 +- sys/platform/vkernel64/platform/pmap_inval.c | 25 +++-- sys/platform/vkernel64/x86_64/mp.c | 4 +- sys/platform/vkernel64/x86_64/trap.c | 17 +++- 6 files changed, 125 insertions(+), 61 deletions(-) http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/068a77b8cef786dbd156738965090790c7c02719 -- DragonFly BSD source repository