motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-06 09:13:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target/i386: Disable MPX support on named CPU models

Browse source 
MPX support is being phased out by Intel; GCC has dropped it, Linux
is also going to do that.  Even though KVM will have special code
to support MPX after the kernel proper stops enabling it in XCR0,
we probably also want to deprecate that in a few years.  As a start,
do not enable it by default for any named CPU model starting with
the 4.0 machine types; this include Skylake, Icelake and Cascadelake.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20181220121100.21554-1-pbonzini@redhat.com>
Reviewed-by:   Wainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Paolo Bonzini 2018-12-20 13:11:00 +01:00 • committed by Eduardo Habkost
parent 483c6ad426
commit ecb85fe48c
2 changed files with 14 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

7
hw/i386/pc.c
View file

@ -115,6 +115,13 @@ GlobalProperty pc_compat_3_1[] = {
{ "Opteron_G3" "-" TYPE_X86_CPU, "rdtscp", "off" },
{ "Opteron_G4" "-" TYPE_X86_CPU, "rdtscp", "off" },
{ "Opteron_G5" "-" TYPE_X86_CPU, "rdtscp", "off" },
{ "Skylake-Client" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Skylake-Client-IBRS" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Skylake-Server" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Skylake-Server-IBRS" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Cascadelake-Server" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Icelake-Client" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Icelake-Server" "-" TYPE_X86_CPU, "mpx", "on" },
};
const size_t pc_compat_3_1_len = G_N_ELEMENTS(pc_compat_3_1);