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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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e52ad1ddd0
Drop x86.h include from cpuid.h to allow the x86.h to include the cpuid.h instead. Also fix various places where x86.h was implicitly included via cpuid.h Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Link: https://lore.kernel.org/r/20240906221824.491834-2-mlevitsk@redhat.com [sean: fixup a missed include in mtrr.c] Signed-off-by: Sean Christopherson <seanjc@google.com>
133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vMTRR implementation
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*
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* Copyright (C) 2006 Qumranet, Inc.
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* Copyright 2010 Red Hat, Inc. and/or its affiliates.
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* Copyright(C) 2015 Intel Corporation.
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*
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* Authors:
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* Yaniv Kamay <yaniv@qumranet.com>
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* Avi Kivity <avi@qumranet.com>
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* Marcelo Tosatti <mtosatti@redhat.com>
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* Paolo Bonzini <pbonzini@redhat.com>
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* Xiao Guangrong <guangrong.xiao@linux.intel.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kvm_host.h>
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#include <asm/mtrr.h>
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#include "cpuid.h"
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#include "x86.h"
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static u64 *find_mtrr(struct kvm_vcpu *vcpu, unsigned int msr)
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{
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int index;
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switch (msr) {
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case MTRRphysBase_MSR(0) ... MTRRphysMask_MSR(KVM_NR_VAR_MTRR - 1):
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index = msr - MTRRphysBase_MSR(0);
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return &vcpu->arch.mtrr_state.var[index];
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case MSR_MTRRfix64K_00000:
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return &vcpu->arch.mtrr_state.fixed_64k;
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case MSR_MTRRfix16K_80000:
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case MSR_MTRRfix16K_A0000:
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index = msr - MSR_MTRRfix16K_80000;
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return &vcpu->arch.mtrr_state.fixed_16k[index];
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case MSR_MTRRfix4K_C0000:
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case MSR_MTRRfix4K_C8000:
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case MSR_MTRRfix4K_D0000:
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case MSR_MTRRfix4K_D8000:
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case MSR_MTRRfix4K_E0000:
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case MSR_MTRRfix4K_E8000:
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case MSR_MTRRfix4K_F0000:
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case MSR_MTRRfix4K_F8000:
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index = msr - MSR_MTRRfix4K_C0000;
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return &vcpu->arch.mtrr_state.fixed_4k[index];
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case MSR_MTRRdefType:
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return &vcpu->arch.mtrr_state.deftype;
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default:
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break;
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}
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return NULL;
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}
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static bool valid_mtrr_type(unsigned t)
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{
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return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
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}
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static bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
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{
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int i;
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u64 mask;
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if (msr == MSR_MTRRdefType) {
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if (data & ~0xcff)
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return false;
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return valid_mtrr_type(data & 0xff);
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} else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
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for (i = 0; i < 8 ; i++)
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if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
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return false;
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return true;
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}
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/* variable MTRRs */
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if (WARN_ON_ONCE(!(msr >= MTRRphysBase_MSR(0) &&
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msr <= MTRRphysMask_MSR(KVM_NR_VAR_MTRR - 1))))
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return false;
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mask = kvm_vcpu_reserved_gpa_bits_raw(vcpu);
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if ((msr & 1) == 0) {
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/* MTRR base */
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if (!valid_mtrr_type(data & 0xff))
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return false;
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mask |= 0xf00;
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} else {
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/* MTRR mask */
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mask |= 0x7ff;
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}
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return (data & mask) == 0;
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}
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int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
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{
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u64 *mtrr;
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mtrr = find_mtrr(vcpu, msr);
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if (!mtrr)
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return 1;
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if (!kvm_mtrr_valid(vcpu, msr, data))
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return 1;
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*mtrr = data;
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return 0;
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}
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int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
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{
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u64 *mtrr;
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/* MSR_MTRRcap is a readonly MSR. */
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if (msr == MSR_MTRRcap) {
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/*
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* SMRR = 0
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* WC = 1
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* FIX = 1
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* VCNT = KVM_NR_VAR_MTRR
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*/
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*pdata = 0x500 | KVM_NR_VAR_MTRR;
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return 0;
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}
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mtrr = find_mtrr(vcpu, msr);
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if (!mtrr)
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return 1;
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*pdata = *mtrr;
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return 0;
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}
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