freebsd-skq

History

neel 8f40ca632d Avoid doing unnecessary nested TLB invalidations.

Prior to this change the cached value of 'pm_eptgen' was tracked per-vcpu
and per-hostcpu. In the degenerate case where 'N' vcpus were sharing
a single hostcpu this could result in 'N - 1' unnecessary TLB invalidations.
Since an 'invept' invalidates mappings for all VPIDs the first 'invept'
is sufficient.

Fix this by moving the 'eptgen[MAXCPU]' array from 'vmxctx' to 'struct vmx'.

If it is known that an 'invept' is going to be done before entering the
guest then it is safe to skip the 'invvpid'. The stat VPU_INVVPID_SAVED
counts the number of 'invvpid' invalidations that were avoided because
they were subsumed by an 'invept'.

Discussed with:	grehan

2014-02-04 02:45:08 +00:00

acpica

Consistently use round_page(x) rather than roundup(x, PAGE_SIZE). There is

2013-02-15 22:43:08 +00:00

amd64

Add support for 'clac' and 'stac' to DDB's disassembler on amd64.

2014-01-27 18:53:18 +00:00

conf

Add VT kernel configuration to ease testing of vt(9), aka Newcons

2014-01-19 18:46:38 +00:00

ia32

x86: Allow users to change PSL_RF via ptrace(PT_SETREGS...)