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| author | Daniel Henrique Barboza <[email protected]> | 2023-08-03 16:33:00 +0000 |
|---|---|---|
| committer | Anup Patel <[email protected]> | 2023-08-08 11:55:58 +0000 |
| commit | 1099c80906d358db542c64aba370291ae4b932b7 (patch) | |
| tree | fe6a1519846b8bfeb703a9247601ac07e342193d /arch/riscv/kvm/vcpu_vector.c | |
| parent | RISC-V: KVM: avoid EBUSY when writing the same machine ID val (diff) | |
| download | kernel-1099c80906d358db542c64aba370291ae4b932b7.tar.gz kernel-1099c80906d358db542c64aba370291ae4b932b7.zip | |
RISC-V: KVM: avoid EBUSY when writing the same isa_ext val
riscv_vcpu_set_isa_ext_single() will prevent any write of isa_ext regs
if the vcpu already started spinning.
But if there's no extension state (enabled/disabled) made by the
userspace, there's no need to -EBUSY out - we can treat the operation as
a no-op.
zicbom/zicboz_block_size, ISA config reg and mvendorid/march/mimpid
already works in a more permissive manner w.r.t userspace writes being a
no-op, so let's do the same with isa_ext writes.
Signed-off-by: Daniel Henrique Barboza <[email protected]>
Reviewed-by: Andrew Jones <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
Diffstat (limited to 'arch/riscv/kvm/vcpu_vector.c')
0 files changed, 0 insertions, 0 deletions