RISC-V: KVM: Provide UAPI for Zicbop block size

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We're about to allow guests to use the Zicbop extension.
KVM userspace needs to know the cache block size in order to
properly advertise it to the guest. Provide a virtual config
register for userspace to get it with the GET_ONE_REG API, but
setting it cannot be supported, so disallow SET_ONE_REG.

Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Nutty Liu <nutty.liu@hotmail.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/befd8403cd76d7adb97231ac993eaeb86bf2582c.1754646071.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>

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Quan Zhou 2025-08-08 18:18:34 +08:00 • committed by Anup Patel

parent eca26eadd2

commit 48e2febcda

2 changed files with 15 additions and 0 deletions

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arch/riscv/include/uapi/asm/kvm.h

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14

arch/riscv/kvm/vcpu_onereg.c

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