From: Oliver Upton <oliver.upton@linux.dev>
Date: Fri, 12 Sep 2025 21:22:55 +0000 (-0700)
Subject: KVM: arm64: nv: Expose FEAT_TWED to NV-enabled VMs
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=952387c9d39998c7ba48a93aa7f8b8eb420d61dd;p=users%2Fhch%2Fmisc.git

KVM: arm64: nv: Expose FEAT_TWED to NV-enabled VMs

KVM now handles HCR_EL2.{TWEDEn,TWEDEL} correctly when computing the
effective HCR for a nested context. Advertise the feature.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---

diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index 4e70b4908c99..a5e1a3de2742 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -1528,7 +1528,6 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val)
 			 ID_AA64MMFR1_EL1_TIDCP1	|
 			 ID_AA64MMFR1_EL1_nTLBPA	|
 			 ID_AA64MMFR1_EL1_ETS		|
-			 ID_AA64MMFR1_EL1_TWED		|
 			 ID_AA64MMFR1_EL1_XNX		|
 			 ID_AA64MMFR1_EL1_SpecSEI	|
 			 ID_AA64MMFR1_EL1_HAFDBS);