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

Browse source

We're about to allow guests to use the Zicboz 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: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20230224162631.405473-8-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

...

This commit is contained in:

Andrew Jones 2023-02-24 17:26:30 +01:00 • committed by Palmer Dabbelt

parent ab0f77465e

commit 665fd88624

No known key found for this signature in database

GPG key ID: 2E1319F35FBB1889

2 changed files with 8 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

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

View file

7

arch/riscv/kvm/vcpu.c

View file