RISC-V: KVM: Implement trap & emulate for hpmcounters

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As the KVM guests only see the virtual PMU counters, all hpmcounter
access should trap and KVM emulates the read access on behalf of guests.

Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

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Atish Patra 2023-02-07 01:55:26 -08:00 • committed by Anup Patel

parent f04bafb52f

commit a9ac6c3752

3 changed files with 77 additions and 2 deletions

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16

arch/riscv/include/asm/kvm_vcpu_pmu.h

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4

arch/riscv/kvm/vcpu_insn.c

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59

arch/riscv/kvm/vcpu_pmu.c

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