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a7014f4654
Implement the write_vcbm() function to handle the MSR_IA32_type_MASK_n vCBM MSRs write request Call write_vclosid() to handle MSR_IA32_PQR_ASSOC MSR write request Several vCAT P2V (physical to virtual) and V2P (virtual to physical) mappings exist: struct acrn_vm_config *vm_config = get_vm_config(vm_id) max_pcbm = vm_config->max_type_pcbm (type: l2 or l3) mask_shift = ffs64(max_pcbm) vclosid = vmsr - MSR_IA32_type_MASK_0 pclosid = vm_config->pclosids[vclosid] pmsr = MSR_IA32_type_MASK_0 + pclosid pcbm = vcbm << mask_shift vcbm = pcbm >> mask_shift Where MSR_IA32_type_MASK_n: L2 or L3 mask msr address for CLOSIDn, from 0C90H through 0D8FH (inclusive). max_pcbm: a bitmask that selects all the physical cache ways assigned to the VM vclosid: virtual CLOSID, always starts from 0 pclosid: corresponding physical CLOSID for a given vclosid vmsr: virtual msr address, passed to vCAT handlers by the caller functions rdmsr_vmexit_handler()/wrmsr_vmexit_handler() pmsr: physical msr address vcbm: virtual CBM, passed to vCAT handlers by the caller functions rdmsr_vmexit_handler()/wrmsr_vmexit_handler() pcbm: physical CBM Tracked-On: #5917 Signed-off-by: dongshen <dongsheng.x.zhang@intel.com> Acked-by: Eddie Dong <eddie.dong@Intel.com>
25 lines
831 B
C
25 lines
831 B
C
/*
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* Copyright (C) 2021 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef VCAT_H_
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#define VCAT_H_
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#include <asm/guest/vm.h>
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bool is_l2_vcat_configured(const struct acrn_vm *vm);
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bool is_l3_vcat_configured(const struct acrn_vm *vm);
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uint16_t vcat_get_vcbm_len(const struct acrn_vm *vm, int res);
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void init_vcat_msrs(struct acrn_vcpu *vcpu);
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uint16_t vcat_get_num_vclosids(const struct acrn_vm *vm);
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uint64_t vcat_pcbm_to_vcbm(const struct acrn_vm *vm, uint64_t pcbm, int res);
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int32_t read_vcbm(const struct acrn_vcpu *vcpu, uint32_t vmsr, uint64_t *rval);
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int32_t write_vcbm(struct acrn_vcpu *vcpu, uint32_t vmsr, uint64_t val);
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int32_t read_vclosid(const struct acrn_vcpu *vcpu, uint64_t *rval);
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int32_t write_vclosid(struct acrn_vcpu *vcpu, uint64_t val);
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#endif /* VCAT_H_ */
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