From 642c23ea8b45b673d8a256e01c04ef5b3c819f11 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 20 Feb 2025 13:49:04 +0000 Subject: [PATCH] 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: Marc Zyngier Reviewed-by: Joey Gouly Link: https://lore.kernel.org/r/20250220134907.554085-12-maz@kernel.org Signed-off-by: Oliver Upton --- arch/arm64/kvm/sys_regs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index dacccc35a3bd5..1a18a0324d9ff 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -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), -- 2.39.5