9bfd900bee
Currently, the every vcpu only stores the ISA extensions in a unsigned long which is not scalable as number of extensions will continue to grow. Using a bitmap allows the ISA extension to support any number of extensions. The CONFIG one reg interface implementation is modified to support the bitmap as well. But it is meant only for base extensions. Thus, the first element of the bitmap array is sufficient for that interface. In the future, all the new multi-letter extensions must use the ISA_EXT one reg interface that allows enabling/disabling any extension now. Signed-off-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Anup Patel <anup@brainfault.org>
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Atish Patra <atish.patra@wdc.com>
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __KVM_VCPU_RISCV_FP_H
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#define __KVM_VCPU_RISCV_FP_H
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#include <linux/types.h>
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struct kvm_cpu_context;
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#ifdef CONFIG_FPU
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void __kvm_riscv_fp_f_save(struct kvm_cpu_context *context);
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void __kvm_riscv_fp_f_restore(struct kvm_cpu_context *context);
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void __kvm_riscv_fp_d_save(struct kvm_cpu_context *context);
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void __kvm_riscv_fp_d_restore(struct kvm_cpu_context *context);
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void kvm_riscv_vcpu_fp_reset(struct kvm_vcpu *vcpu);
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void kvm_riscv_vcpu_guest_fp_save(struct kvm_cpu_context *cntx,
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const unsigned long *isa);
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void kvm_riscv_vcpu_guest_fp_restore(struct kvm_cpu_context *cntx,
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const unsigned long *isa);
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void kvm_riscv_vcpu_host_fp_save(struct kvm_cpu_context *cntx);
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void kvm_riscv_vcpu_host_fp_restore(struct kvm_cpu_context *cntx);
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#else
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static inline void kvm_riscv_vcpu_fp_reset(struct kvm_vcpu *vcpu)
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{
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}
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static inline void kvm_riscv_vcpu_guest_fp_save(struct kvm_cpu_context *cntx,
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const unsigned long *isa)
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{
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}
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static inline void kvm_riscv_vcpu_guest_fp_restore(
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struct kvm_cpu_context *cntx,
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const unsigned long *isa)
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{
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}
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static inline void kvm_riscv_vcpu_host_fp_save(struct kvm_cpu_context *cntx)
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{
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}
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static inline void kvm_riscv_vcpu_host_fp_restore(
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struct kvm_cpu_context *cntx)
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{
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}
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#endif
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int kvm_riscv_vcpu_get_reg_fp(struct kvm_vcpu *vcpu,
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const struct kvm_one_reg *reg,
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unsigned long rtype);
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int kvm_riscv_vcpu_set_reg_fp(struct kvm_vcpu *vcpu,
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const struct kvm_one_reg *reg,
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unsigned long rtype);
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#endif
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