From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9527D4746A2; Wed, 22 Jul 2026 07:43:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784706183; cv=none; b=rkeQLUgHFJ/u3bSuPQAPyYBdWaG/goGiuKIuvWHy6yNueNoC72IljMXkm9QUfKLU7ffPJiTamZ6NN2ZlQg74z/WrICFW9NoYI04Q1Q3cjLJKs5jVhIiLdLx5uCt9WPh24uP2Zpo9gitc/rvdKu4xcHDzLLEYL6XFxLIZx2VaM70= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784706183; c=relaxed/simple; bh=1a6g0FUNYjctw5B94xyjRpZGAbx7YJm1TxMbIoRmB4Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fcTLq9m8n5PpFYwOmZ0+uHaw3ZtrwjK4NWtQzVSjqgNLuO1WuIUzBxVt0D9ETfVAynXhiP3ZWtkBYgJFFcXr1Zg3JnZ39pDBHIun1YBb7gYU4KS9nluNqzi+Xg5QvP29JpKAPPGJOWyEIdDZhmP/uyITC/85o8q6T/htPaK+FNY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PyfsmJiX; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PyfsmJiX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8E071F000E9; Wed, 22 Jul 2026 07:43:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784706180; bh=xvfRoiVVXMz5ozRg++qNQ5fER4Qs3LDX4/NpXBs7HWc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PyfsmJiXqK5QYaIox8z01Y3O4loGKP5br4n2s6FW9QPJVoqlSz9dWpUJh5jXi4w48 FaUH/kgVY9eRAE7KklrjIavGow2cc5jNfDubUknEhdW7tVRmk38L3UWkimFMCAPGKT Yllsf2if0cpFy895uq/UjJQXmIyI1+AgwUGLhcRtAPvD5ZRjQqSiyYL9vf0/A4IbxD MLeJNAQudSf666YnmRdnKR6Cs0g3ZSEVLi7z4Bu2jOZgpcebQaowmtcXpOmFCpKdpO xXExTHExiZ4bSRk2S+M8r21zChwAYb4ZmbvoY7t8dv2HAAhpEX2zYLQV78ECV0+98M eKuG49/FyoaQw== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wmRbX-00000007VfN-0j8g; Wed, 22 Jul 2026 07:42:59 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: Steffen Eiden , Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Yao Yuan , Wei-Lin Chang Subject: [PATCH v3 22/28] KVM: arm64: Add routing for NVHCR_EL2 trap Date: Wed, 22 Jul 2026 08:42:28 +0100 Message-ID: <20260722074234.3330999-23-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260722074234.3330999-1-maz@kernel.org> References: <20260722074234.3330999-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, seiden@linux.ibm.com, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, yaoyuan@linux.alibaba.com, weilin.chang@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false NVHCR_EL2 accesses from EL1 are taken to EL2 when HCRX_EL2.NVTGE==0 and HCR_EL2.NV==1. Describe this in the exception routing tables. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/emulate-nested.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index b7f3d86a94031..625604019fb32 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -136,6 +136,8 @@ enum cgt_group_id { CGT_CPTR_TTA, CGT_MDCR_HPMN, + CGT_HCR_NV_HCRX_nNVTGE, + /* Must be last */ __NR_CGT_GROUP_IDS__ }; @@ -588,6 +590,15 @@ static enum trap_behaviour check_mdcr_hpmn(struct kvm_vcpu *vcpu) return BEHAVE_HANDLE_LOCALLY; } +static enum trap_behaviour check_hcr_nv_hcrx_nnvtge(struct kvm_vcpu *vcpu) +{ + if ((__vcpu_sys_reg(vcpu, HCR_EL2) & HCR_EL2_NV) && + !(__vcpu_sys_reg(vcpu, HCRX_EL2) & HCRX_EL2_NVTGE)) + return BEHAVE_FORWARD_RW; + + return BEHAVE_HANDLE_LOCALLY; +} + #define CCC(id, fn) \ [id - __COMPLEX_CONDITIONS__] = fn @@ -598,6 +609,7 @@ static const complex_condition_check ccc[] = { CCC(CGT_CNTHCTL_EL1NVVCT, check_cnthctl_el1nvvct), CCC(CGT_CPTR_TTA, check_cptr_tta), CCC(CGT_MDCR_HPMN, check_mdcr_hpmn), + CCC(CGT_HCR_NV_HCRX_nNVTGE, check_hcr_nv_hcrx_nnvtge), }; /* @@ -853,6 +865,7 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = { SR_TRAP(SYS_SCTLR2_EL2, CGT_HCR_NV), SR_RANGE_TRAP(SYS_HCR_EL2, SYS_HCRX_EL2, CGT_HCR_NV), + SR_TRAP(SYS_NVHCR_EL2, CGT_HCR_NV_HCRX_nNVTGE), SR_TRAP(SYS_SMPRIMAP_EL2, CGT_HCR_NV), SR_TRAP(SYS_SMCR_EL2, CGT_HCR_NV), SR_RANGE_TRAP(SYS_TTBR0_EL2, -- 2.47.3