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 C064AC624A4 for ; Mon, 31 Aug 2026 16:35:16 +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:References:In-Reply-To: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:List-Owner; bh=a+P7shhjvj4jGl8Oj99Y+U9YcvQ8GI3dI5cVnZqFmdg=; b=1b/ltBAXiJgjG/ay6QQdMaMpNj zZKJHJBJuRHmiF1vcukb7n8KsTv4k8W4dA6SqpQtwQS5VTVQ7awDCra9Nv29BXD/1IkpK7xspmv16 vh8n2G8OJ/jyAvZX51x0lrGSS1htpcDlVq1QsCqA2uzQ4CIdFm4HNOM1Q6V1fr5buqCKfNWOSJeWk JhOsEVyaw9dOnb6lsZ4wJrGlGMNZ+yX/8IGKJCTof5HCyw46jXWsLaNEujNPQgPcKlOPbB0pKja/T mYYsQvaIkK9Su2XDcDL9rCpbW+a2rD680/IBsk8PreFMmKL3ELCwNo4G/T4MCZy9lVKDbDOLEFix2 6bHiTlXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x14yU-0000000A40L-0yL3; Mon, 31 Aug 2026 16:35:10 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x14yR-0000000A3vP-03ns for linux-arm-kernel@bombadil.infradead.org; Mon, 31 Aug 2026 16:35:07 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=a+P7shhjvj4jGl8Oj99Y+U9YcvQ8GI3dI5cVnZqFmdg=; b=YBgDpc5Hp2xn+2KMigbIqcHhTs tZuV21Ir2XBDLUMlq+6d3DJk3CPWo0DQJPuPtwbrieNzpXdKgFH5sNYKGwmKvjknBVYI/G8kppSQ/ 9UH4piV0T4MRONGBz+J1paGlu4cQ5GRaw4qBH/qyZdOkW9wsNlZKqrbCEEWEzT+vRTDaYMjFHxQg0 w9JMwkQyuh3la33AT0ZwlHLmI5XAZNTBTivKs0ulkUtJWOznL1Ej0KzhwDm4Pjyxdrmwn4K9OEEKI 7qz9JsdAVhIiFRmRgSmJDVn5Hhc986aYrkHys1gDHO9x5oM9lhPyJTj9m9sYVEkCU4jqvDr5t0DR5 Zni37gjg==; Received: from out-104.mta0.migadu.com ([2001:41d0:1004:224b::68] helo=mta0.migadu.com) by desiato.infradead.org with esmtps (Exim 4.99.2 #2 (Red Hat Linux)) id 1x14yM-0000000A3fx-1yDx for linux-arm-kernel@lists.infradead.org; Mon, 31 Aug 2026 16:35:05 +0000 X-Envelope-To: linux-arm-kernel@lists.infradead.org DKIM-Signature: a=rsa-sha256; bh=U/axjWQAfQSFNwOk+gQLgXnGQvfOgoP7MHtzfv1LyiQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788194100; v=1; x=1788798900; b=Ei3HO2TICRTj7admtDmRqxINvc44J6WV/8zT9R7q6lwWCLXd7kOWEDBVJUuXDBVObnMXfVid 8gYe93I1xrGjaMaEVFNtX/Sta5zYn8NwKD4jt3v9rf+rsQCTSy6CdqcCDVXmQ1w4QT4NOADooE/ BTTXjheF1kU0WBFxiIsns4aY= X-Envelope-To: linux-arm-kernel@lists.infradead.org Received: by smtp.migadu.com with ESMTPS id d1286ff7c0158266; Mon, 31 Aug 2026 16:35:00 +0000 X-Mizu-Trace-ID: d1286ff7c0158266 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Vincent Donnefort , Quentin Perret , Fuad Tabba Subject: [PATCH 14/17] KVM: arm64: Pend a protected guest's SError with HCR_EL2.VSE only Date: Mon, 31 Aug 2026 17:34:18 +0100 Message-Id: <20260831163421.272420-15-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260831163421.272420-1-fuad.tabba@linux.dev> References: <20260831163421.272420-1-fuad.tabba@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260831_173502_643949_21FBF256 X-CRM114-Status: GOOD ( 11.70 ) 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 kvm_inject_serror_esr() emulates the exception entry when serror_is_masked() reads PSTATE.A clear, but the host has no view of a protected guest's PSTATE.A, and an emulated entry never reaches the guest: the SError is lost. Set VSE instead and let the guest's own PSTATE.A mask it. Signed-off-by: Fuad Tabba --- arch/arm64/kvm/inject_fault.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/inject_fault.c b/arch/arm64/kvm/inject_fault.c index d6c4fc16f8795..b88098a7e756c 100644 --- a/arch/arm64/kvm/inject_fault.c +++ b/arch/arm64/kvm/inject_fault.c @@ -378,8 +378,11 @@ int kvm_inject_serror_esr(struct kvm_vcpu *vcpu, u64 esr) * * As we're emulating the SError injection we need to explicitly populate * ESR_ELx.EC because hardware will not do it on our behalf. + * + * The host does not see a protected guest's PSTATE.A: leave the + * vSError to HCR_EL2.VSE below, which the guest masks itself. */ - if (!serror_is_masked(vcpu)) { + if (!vcpu_is_protected(vcpu) && !serror_is_masked(vcpu)) { pend_serror_exception(vcpu); esr |= FIELD_PREP(ESR_ELx_EC_MASK, ESR_ELx_EC_SERROR) | ESR_ELx_IL; vcpu_write_sys_reg(vcpu, esr, exception_esr_elx(vcpu)); -- 2.39.5