fea4500841
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>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*
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* x86 HVF CPU type initialization
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*
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* Copyright 2021 SUSE LLC
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "host-cpu.h"
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#include "qapi/error.h"
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#include "sysemu/sysemu.h"
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#include "hw/boards.h"
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#include "sysemu/hvf.h"
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#include "hw/core/accel-cpu.h"
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static void hvf_cpu_max_instance_init(X86CPU *cpu)
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{
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CPUX86State *env = &cpu->env;
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host_cpu_max_instance_init(cpu);
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env->cpuid_min_level =
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hvf_get_supported_cpuid(0x0, 0, R_EAX);
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env->cpuid_min_xlevel =
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hvf_get_supported_cpuid(0x80000000, 0, R_EAX);
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env->cpuid_min_xlevel2 =
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hvf_get_supported_cpuid(0xC0000000, 0, R_EAX);
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}
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static void hvf_cpu_xsave_init(void)
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{
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static bool first = true;
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int i;
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if (!first) {
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return;
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}
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first = false;
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/* x87 and SSE states are in the legacy region of the XSAVE area. */
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x86_ext_save_areas[XSTATE_FP_BIT].offset = 0;
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x86_ext_save_areas[XSTATE_SSE_BIT].offset = 0;
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for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) {
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ExtSaveArea *esa = &x86_ext_save_areas[i];
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if (esa->size) {
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int sz = hvf_get_supported_cpuid(0xd, i, R_EAX);
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if (sz != 0) {
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assert(esa->size == sz);
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esa->offset = hvf_get_supported_cpuid(0xd, i, R_EBX);
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}
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}
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}
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}
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static void hvf_cpu_instance_init(CPUState *cs)
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{
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X86CPU *cpu = X86_CPU(cs);
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host_cpu_instance_init(cpu);
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/* Special cases not set in the X86CPUDefinition structs: */
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/* TODO: in-kernel irqchip for hvf */
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if (cpu->max_features) {
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hvf_cpu_max_instance_init(cpu);
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}
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hvf_cpu_xsave_init();
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}
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static void hvf_cpu_accel_class_init(ObjectClass *oc, void *data)
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{
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AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
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acc->cpu_realizefn = host_cpu_realizefn;
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acc->cpu_instance_init = hvf_cpu_instance_init;
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}
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static const TypeInfo hvf_cpu_accel_type_info = {
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.name = ACCEL_CPU_NAME("hvf"),
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.parent = TYPE_ACCEL_CPU,
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.class_init = hvf_cpu_accel_class_init,
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.abstract = true,
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};
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static void hvf_cpu_accel_register_types(void)
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{
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type_register_static(&hvf_cpu_accel_type_info);
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}
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type_init(hvf_cpu_accel_register_types);
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