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target/i386: Populate x86_ext_save_areas offsets using cpuid where possible

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Rather than relying on the X86XSaveArea structure definition,
determine the offset of XSAVE state areas using CPUID leaf 0xd where
possible (KVM and HVF).

Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-8-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Edmondson 2021-07-05 11:46:31 +01:00 • committed by Paolo Bonzini
parent 3568987f78
commit fea4500841
7 changed files with 94 additions and 13 deletions
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20
target/i386/tcg/tcg-cpu.c
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@ -80,6 +80,24 @@ static void tcg_cpu_class_init(CPUClass *cc)
cc->init_accel_cpu = tcg_cpu_init_ops;
}
static void tcg_cpu_xsave_init(void)
{
#define XO(bit, field) \
x86_ext_save_areas[bit].offset = offsetof(X86XSaveArea, field);
XO(XSTATE_FP_BIT, legacy);
XO(XSTATE_SSE_BIT, legacy);
XO(XSTATE_YMM_BIT, avx_state);
XO(XSTATE_BNDREGS_BIT, bndreg_state);
XO(XSTATE_BNDCSR_BIT, bndcsr_state);
XO(XSTATE_OPMASK_BIT, opmask_state);
XO(XSTATE_ZMM_Hi256_BIT, zmm_hi256_state);
XO(XSTATE_Hi16_ZMM_BIT, hi16_zmm_state);
XO(XSTATE_PKRU_BIT, pkru_state);
#undef XO
}
/*
* TCG-specific defaults that override all CPU models when using TCG
*/
@ -93,6 +111,8 @@ static void tcg_cpu_instance_init(CPUState *cs)
X86CPU *cpu = X86_CPU(cs);
/* Special cases not set in the X86CPUDefinition structs: */
x86_cpu_apply_props(cpu, tcg_default_props);
tcg_cpu_xsave_init();
}
static void tcg_cpu_accel_class_init(ObjectClass *oc, void *data)