Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
openSUSE:Leap:15.1:Rings:1-MinimalX
xen
5ca773d1-x86emul-dont-read-mask-reg-without-AVX...
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File 5ca773d1-x86emul-dont-read-mask-reg-without-AVX512F.patch of Package xen
# Commit 6cb7e52edf823fd89fe14da94f9bf3e5cf99d1ff # Date 2019-04-05 17:27:13 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> x86emul: don't read mask register on AVX512F-incapable platforms Nor when register state isn't sufficiently enabled. Reported-by: George Dunlap <george.dunlap@citrix.com> Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -3511,7 +3511,8 @@ x86_emulate( } /* With a memory operand, fetch the mask register in use (if any). */ - if ( ea.type == OP_MEM && evex.opmsk ) + if ( ea.type == OP_MEM && evex.opmsk && + _get_fpu(fpu_type = X86EMUL_FPU_opmask, ctxt, ops) == X86EMUL_OKAY ) { uint8_t *stb = get_stub(stub); @@ -3532,6 +3533,14 @@ x86_emulate( fault_suppression = true; } + if ( fpu_type == X86EMUL_FPU_opmask ) + { + /* Squash (side) effects of the _get_fpu() above. */ + x86_emul_reset_event(ctxt); + put_fpu(X86EMUL_FPU_opmask, false, state, ctxt, ops); + fpu_type = X86EMUL_FPU_none; + } + /* Decode (but don't fetch) the destination operand: register or memory. */ switch ( d & DstMask ) {
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor