From nobody Wed Oct 8 16:10:10 2025 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C88BF2951BA; Fri, 27 Jun 2025 09:05:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751015118; cv=none; b=snC9yqaBTLm8LhkAHYWqP7cVDGDdVq/HF/5zPJjI6KG8NRtnT8vSCsdA97domepNu1LHbntbE2G9b0HLceVeTitVBW677DLgAVIwc4poDXB2044lGH0cijCmMvJExL2EA9a24VHlu1WPDgPAYi4TAaRNERRv1jzRMrCRHx5x1ws= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751015118; c=relaxed/simple; bh=9DFt5yBIByc8A5fTofoeJFiaxrEmzDqhpsfJB8V5+8g=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=tDOGNhUbHQcqTlwnZUWK4e4uVGScmQpTOmkj8O58FetyEes08W4ahH+weKTgyiLEx4TqimzlDzit97aJ6x+/qCji0UcZ8bwecPOcoUIqD3Tp4b2pH12Jte9iUTlWuvLCp2UtAKp5Lb8oERJkd3grjs5UoukCQq+ZvwO+y8cjRbo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8AxnOLKXl5oVjIeAQ--.31464S3; Fri, 27 Jun 2025 17:05:14 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJCxM+TEXl5ovCsAAA--.1247S8; Fri, 27 Jun 2025 17:05:14 +0800 (CST) From: Bibo Mao To: Tianrui Zhao , Huacai Chen , Xianglai Li Cc: kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v4 6/6] LoongArch: KVM: Add address alignment check Date: Fri, 27 Jun 2025 17:05:07 +0800 Message-Id: <20250627090507.808319-7-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250627090507.808319-1-maobibo@loongson.cn> References: <20250627090507.808319-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJCxM+TEXl5ovCsAAA--.1247S8 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" IOCSR instruction supports 1/2/4/8 bytes access, the address should be naturally aligned with its access size. Here address alignment checking is added in eiointc kernel emulation. Cc: stable@vger.kernel.org Fixes: 3956a52bc05b ("LoongArch: KVM: Add EIOINTC read and write functions") Signed-off-by: Bibo Mao --- arch/loongarch/kvm/intc/eiointc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/loongarch/kvm/intc/eiointc.c b/arch/loongarch/kvm/intc/ei= ointc.c index d54fe805bf6e..fab5cf52779c 100644 --- a/arch/loongarch/kvm/intc/eiointc.c +++ b/arch/loongarch/kvm/intc/eiointc.c @@ -316,6 +316,11 @@ static int kvm_eiointc_read(struct kvm_vcpu *vcpu, return -EINVAL; } =20 + if (addr & (len - 1)) { + kvm_err("%s: eiointc not aligned addr %llx len %d\n", __func__, addr, le= n); + return -EINVAL; + } + vcpu->kvm->stat.eiointc_read_exits++; spin_lock_irqsave(&eiointc->lock, flags); switch (len) { @@ -687,6 +692,11 @@ static int kvm_eiointc_write(struct kvm_vcpu *vcpu, return -EINVAL; } =20 + if (addr & (len - 1)) { + kvm_err("%s: eiointc not aligned addr %llx len %d\n", __func__, addr, le= n); + return -EINVAL; + } + vcpu->kvm->stat.eiointc_write_exits++; spin_lock_irqsave(&eiointc->lock, flags); switch (len) { --=20 2.39.3