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

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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
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5
include/hw/i386/pc.h
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@ -374,6 +374,11 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = TYPE_X86_CPU,\
.property = "l3-cache",\
.value = "off",\
},\
{\
.driver = TYPE_X86_CPU,\
.property = "full-cpuid-auto-level",\
.value = "off",\
},
#define PC_COMPAT_2_6 \