From 1a0b2bf6ff11d2e0438f3a7d1d299339edab96e8 Mon Sep 17 00:00:00 2001 From: Jinqian Yang Date: Thu, 11 Sep 2025 19:46:20 +0800 Subject: [PATCH] KVM: arm64: Make ID_AA64MMFR1_EL1.{HCX, TWED} writable from userspace Allow userspace to downgrade {HCX, TWED} in ID_AA64MMFR1_EL1. Userspace can only change the value from high to low. Signed-off-by: Jinqian Yang Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index b29f72478a50..e6ec971eb9d1 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3152,8 +3152,6 @@ static const struct sys_reg_desc sys_reg_descs[] = { ~(ID_AA64MMFR0_EL1_RES0 | ID_AA64MMFR0_EL1_ASIDBITS)), ID_WRITABLE(ID_AA64MMFR1_EL1, ~(ID_AA64MMFR1_EL1_RES0 | - ID_AA64MMFR1_EL1_HCX | - ID_AA64MMFR1_EL1_TWED | ID_AA64MMFR1_EL1_XNX | ID_AA64MMFR1_EL1_VH | ID_AA64MMFR1_EL1_VMIDBits)), -- 2.51.0