motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 08:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target-i386: Automatically set level/xlevel/xlevel2 when needed

Browse source 
Instead of requiring users and management software to be aware of
required CPUID level/xlevel/xlevel2 values for each feature,
automatically increase those values when features need them.

This was already done for CPUID[7].EBX, and is now made generic
for all CPUID feature flags. Unit test included, to make sure we
don't break ABI on older machine-types and don't mess with the
CPUID level values if they are explicitly set by the user.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2016-09-21 13:30:12 -03:00
parent df3e9af8fd
commit c39c0edf9b
4 changed files with 133 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

12
target-i386/cpu.h
View file

@ -1111,9 +1111,12 @@ typedef struct CPUX86State {
struct {} end_reset_fields;
/* processor features (e.g. for CPUID insn) */
uint32_t cpuid_level;
uint32_t cpuid_xlevel;
uint32_t cpuid_xlevel2;
/* Minimum level/xlevel/xlevel2, based on CPU model + features */
uint32_t cpuid_min_level, cpuid_min_xlevel, cpuid_min_xlevel2;
/* Maximum level/xlevel/xlevel2 value for auto-assignment: */
uint32_t cpuid_max_level, cpuid_max_xlevel, cpuid_max_xlevel2;
/* Actual level/xlevel/xlevel2 value: */
uint32_t cpuid_level, cpuid_xlevel, cpuid_xlevel2;
uint32_t cpuid_vendor1;
uint32_t cpuid_vendor2;
uint32_t cpuid_vendor3;
@ -1218,6 +1221,9 @@ struct X86CPU {
/* Compatibility bits for old machine types: */
bool enable_cpuid_0xb;
/* Enable auto level-increase for all CPUID leaves */
bool full_cpuid_auto_level;
/* if true fill the top bits of the MTRR_PHYSMASKn variable range */
bool fill_mtrr_mask;