8a1e4c2437
vmm's CPUID emulation presented Intel topology information to the guest, but disabled AMD topology information and in some cases passed through garbage. I.e., CPUID leaves 0x8000_001[de] were passed through to the guest, but guest CPUs can migrate between host threads, so the information presented was not consistent. This could easily be observed with 'cpucontrol -i 0xfoo /dev/cpuctl0'. Slightly improve this situation by enabling the AMD topology feature flag and presenting at least the CPUID fields used by FreeBSD itself to probe topology on more modern AMD64 hardware (Family 15h+). Older stuff is probably less interesting. I have not been able to empirically confirm it is sufficient, but it should not regress anything either. Reviewed by: araujo (previous version) Relnotes: sure
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _X86_H_
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#define _X86_H_
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#define CPUID_0000_0000 (0x0)
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#define CPUID_0000_0001 (0x1)
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#define CPUID_0000_0002 (0x2)
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#define CPUID_0000_0003 (0x3)
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#define CPUID_0000_0004 (0x4)
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#define CPUID_0000_0006 (0x6)
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#define CPUID_0000_0007 (0x7)
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#define CPUID_0000_000A (0xA)
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#define CPUID_0000_000B (0xB)
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#define CPUID_0000_000D (0xD)
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#define CPUID_8000_0000 (0x80000000)
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#define CPUID_8000_0001 (0x80000001)
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#define CPUID_8000_0002 (0x80000002)
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#define CPUID_8000_0003 (0x80000003)
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#define CPUID_8000_0004 (0x80000004)
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#define CPUID_8000_0006 (0x80000006)
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#define CPUID_8000_0007 (0x80000007)
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#define CPUID_8000_0008 (0x80000008)
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#define CPUID_8000_001D (0x8000001D)
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#define CPUID_8000_001E (0x8000001E)
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/*
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* CPUID instruction Fn0000_0001:
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*/
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#define CPUID_0000_0001_APICID_MASK (0xff<<24)
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#define CPUID_0000_0001_APICID_SHIFT 24
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/*
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* CPUID instruction Fn0000_0001 ECX
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*/
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#define CPUID_0000_0001_FEAT0_VMX (1<<5)
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int x86_emulate_cpuid(struct vm *vm, int vcpu_id, uint32_t *eax, uint32_t *ebx,
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uint32_t *ecx, uint32_t *edx);
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enum vm_cpuid_capability {
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VCC_NONE,
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VCC_NO_EXECUTE,
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VCC_FFXSR,
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VCC_TCE,
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VCC_LAST
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};
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/*
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* Return 'true' if the capability 'cap' is enabled in this virtual cpu
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* and 'false' otherwise.
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*/
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bool vm_cpuid_capability(struct vm *vm, int vcpuid, enum vm_cpuid_capability);
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#endif
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