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[Qemu-devel] [PATCH 0/2] tcg/i386 guest_base improvements
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 0/2] tcg/i386 guest_base improvements |
Date: |
Sat, 4 Jun 2016 00:54:05 -0700 |
The first change does two things: (1) improve bsd-user so that it
doesn't continually reload guest_base into a temp register and
(2) extract the bulk of the guest_base logic to a routine that
is run once at startup.
The second change adds segmentation support to 32-bit linux. There,
if we're using a guest base, we can save 3 bytes per memory op by
using a segment override. In addition, if we're using a reserved_va,
we can set up the segment such that guest memory references are
constrained by the segment.
Comments?
r~
Richard Henderson (2):
tcg/i386: Reserve register for guest_base if a segment isn't available
tcg/i386: Use segment for 32-bit guest base on linux
tcg/i386/tcg-target.inc.c | 181 +++++++++++++++++++++++++---------------------
1 file changed, 100 insertions(+), 81 deletions(-)
--
2.5.5
- [Qemu-devel] [PATCH 0/2] tcg/i386 guest_base improvements,
Richard Henderson <=