From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1B318C44501 for ; Wed, 21 Jan 2026 10:18:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=nJvSFAuR3Pk/7986jCrxf9amO+0VQYQ+3sUulNfFyU4=; b=Ff1CHtKCIQNaJx3JB8bgl0VytD xB3DykJskLvUP9pYksbG0vACQmklnB4MXP80AiBncPcgq+FuvrQHRboVeAp3IlJaNoIKASS+a8v51 BphryadqtsrwjzjGA8eANWySws5TlvA/NSKLSqvDI9D7MbxFAwByImrR2G63k/S90V/5VjDlb5hP8 CDdWiTDS3H+7JiB5KbxBjkriHaUuCV+7TD0zEwP553De+aTYiIkE2dQmrFiG9nC+aFVzhDYon+ux3 V4OWyXhQNPksyOEfB9ZG6uyFEvPObMqwMWcPWlmASJ3OZDDCQQwcnmlxPvX0VOzZcp4+rU6qA+cbw 5gWv1sDQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1viVIW-00000005Gfw-0FpS; Wed, 21 Jan 2026 10:18:48 +0000 Received: from out-183.mta0.migadu.com ([2001:41d0:1004:224b::b7]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1viVIT-00000005G5k-2GFI for linux-arm-kernel@lists.infradead.org; Wed, 21 Jan 2026 10:18:47 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1768990599; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=nJvSFAuR3Pk/7986jCrxf9amO+0VQYQ+3sUulNfFyU4=; b=lwZxIFjdRpZOja2XmzGbHhHRf+eXBIHyxXHA1bs0AkCJbgGHA99lfd1FGFtkFExDabAK8z 5lAdIBzM77+Up6idcEwd58Gw3iFyNLOnRkmWJZTjZPsPlBkvOjK73jfVWrY6JMxHuXJyE1 KK5mklWJU1Gki5ziL+WnZaFiVeKZenU= From: Zenghui Yu To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: maz@kernel.org, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, zenghui.yu@linux.dev, wanghaibin.wang@huawei.com Subject: [PATCH] KVM: arm64: nv: Return correct RES0 bits for FGT registers Date: Wed, 21 Jan 2026 18:16:31 +0800 Message-Id: <20260121101631.41037-1-zenghui.yu@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260121_021845_781244_3E0C5C54 X-CRM114-Status: UNSURE ( 9.76 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Zenghui Yu (Huawei)" We had extended the sysreg masking infrastructure to more general registers, instead of restricting it to VNCR-backed registers, since commit a0162020095e ("KVM: arm64: Extend masking facility to arbitrary registers"). Fix kvm_get_sysreg_res0() to reflect this fact. Note that we're sure that we only deal with FGT registers in kvm_get_sysreg_res0(), the if (sr < __VNCR_START__) is actually a never false, which should probably be removed later. Fixes: 69c19e047dfe ("KVM: arm64: Add TCR2_EL2 to the sysreg arrays") Signed-off-by: Zenghui Yu (Huawei) --- arch/arm64/kvm/emulate-nested.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 834f13fb1fb7..2d04fb56746e 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -2428,7 +2428,7 @@ static u64 kvm_get_sysreg_res0(struct kvm *kvm, enum vcpu_sysreg sr) masks = kvm->arch.sysreg_masks; - return masks->mask[sr - __VNCR_START__].res0; + return masks->mask[sr - __SANITISED_REG_START__].res0; } static bool check_fgt_bit(struct kvm_vcpu *vcpu, enum vcpu_sysreg sr, -- 2.34.1