Commit 642c23ea authored by Marc Zyngier's avatar Marc Zyngier Committed by Oliver Upton
Browse files

KVM: arm64: Make ID_AA64MMFR4_EL1.NV_frac writable 



We want to make sure that it is possible for userspace to configure
whether recursive NV is possible. Make NV_frac writable for that
purpose.

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Reviewed-by: default avatarJoey Gouly <joey.gouly@arm.com>
Link: https://lore.kernel.org/r/20250220134907.554085-12-maz@kernel.org


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent f83c41fb

arch/arm64/kvm/sys_regs.c

+1 −1
Original line number Diff line number Diff line
@@ -2683,7 +2683,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { 
	ID_WRITABLE(ID_AA64MMFR3_EL1, (ID_AA64MMFR3_EL1_TCRX	|

				       ID_AA64MMFR3_EL1_S1PIE   |

				       ID_AA64MMFR3_EL1_S1POE)),

	ID_SANITISED(ID_AA64MMFR4_EL1),

	ID_WRITABLE(ID_AA64MMFR4_EL1, ID_AA64MMFR4_EL1_NV_frac),

	ID_UNALLOCATED(7,5),

	ID_UNALLOCATED(7,6),

	ID_UNALLOCATED(7,7),