RISC-V: KVM: Support 64 bit firmware counters on RV32

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The SBI v2.0 introduced a fw_read_hi function to read 64 bit firmware
counters for RV32 based systems.

Add infrastructure to support that.

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20240420151741.962500-16-atishp@rivosinc.com
Signed-off-by: Anup Patel <anup@brainfault.org>

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This commit is contained in:

Atish Patra 2024-04-20 08:17:31 -07:00 • committed by Anup Patel

parent 16b0bde9a3

commit 08fb07d6dc

3 changed files with 52 additions and 2 deletions

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4

arch/riscv/include/asm/kvm_vcpu_pmu.h

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44

arch/riscv/kvm/vcpu_pmu.c

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6

arch/riscv/kvm/vcpu_sbi_pmu.c

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