From nobody Tue Feb 10 01:15:08 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1ABFB392C2E; Thu, 22 Jan 2026 11:14:46 +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=1769080489; cv=none; b=ktwc8BI312o19Zdy6dz9wOe3IQbRaaeO+QmU+wpT5nJOh8pQ2KO8Bx19bNhWtOhEMUwXetp1GL+N5rHnQ7uBipsPmdWeLJEEci2JLqy/HK2lFj+lnC5S5dvnQ1u6SntZjx92w/fC/hAkz1zjPfTOGPrKwvmL1JRZPH2vxcdqCkw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769080489; c=relaxed/simple; bh=yw0kJTMQtMqr3v+Rrkx70e6nlIcqa+DOS9BluHh8uiM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Jf7gwTQJWxmHoV4LP/dyuO5nJPX6cSCu9Sp6MAL7lqQ20xZLWnsBt1nCsgpkvpBx+qpV/4kJXadsTa8PiB9ymGVxOs51lm1y3DcSAKbsb/263zVU5ccLE1osUN9jC+ZPAUfYv/ms4Aj1XPQVrVBkTJ+WGf36jkDaKFOeG4Lm6IE= 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 _____8Dx+8KdBnJpzHsLAA--.36936S3; Thu, 22 Jan 2026 19:14:37 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJDxquCbBnJpwR4rAA--.21397S4; Thu, 22 Jan 2026 19:14:36 +0800 (CST) From: Bibo Mao To: Huacai Chen , WANG Xuerui , Tianrui Zhao Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH 2/3] LoongArch: KVM: Move LASX capability check in LASX exception handler Date: Thu, 22 Jan 2026 19:14:32 +0800 Message-Id: <20260122111434.1737872-3-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260122111434.1737872-1-maobibo@loongson.cn> References: <20260122111434.1737872-1-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: qMiowJDxquCbBnJpwR4rAA--.21397S4 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" Like FPU exception handler, check LASX capability in LASX exception handler rather than function kvm_own_lasx(). Signed-off-by: Bibo Mao --- arch/loongarch/kvm/exit.c | 4 +++- arch/loongarch/kvm/vcpu.c | 3 --- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index 76eec3f24953..74b427287e96 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -810,8 +810,10 @@ static int kvm_handle_lsx_disabled(struct kvm_vcpu *vc= pu, int ecode) */ static int kvm_handle_lasx_disabled(struct kvm_vcpu *vcpu, int ecode) { - if (kvm_own_lasx(vcpu)) + if (!kvm_guest_has_lasx(&vcpu->arch)) kvm_queue_exception(vcpu, EXCCODE_INE, 0); + else + kvm_own_lasx(vcpu); =20 return RESUME_GUEST; } diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index aff295aa6b0b..d91a1160a309 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -1391,9 +1391,6 @@ int kvm_own_lsx(struct kvm_vcpu *vcpu) /* Enable LASX and restore context */ int kvm_own_lasx(struct kvm_vcpu *vcpu) { - if (!kvm_guest_has_fpu(&vcpu->arch) || !kvm_guest_has_lsx(&vcpu->arch) ||= !kvm_guest_has_lasx(&vcpu->arch)) - return -EINVAL; - preempt_disable(); =20 kvm_check_fcsr(vcpu, vcpu->arch.fpu.fcsr); --=20 2.39.3