From nobody Mon Feb 9 22:59:54 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8AB5A2628D; Tue, 3 Feb 2026 03:31:37 +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=1770089502; cv=none; b=A1M2zfvFyeLD3Y7X7jet1IqRaB+fLhGrikA/u7sXuBgXwdG9wwUcR3aAbWTzf1hsTS/JHdAK55wB2RnaHn662Y9vdjJLz7RZgQjN6RtVExKEZb0F48IzypK4lkWDM1V1oZ8bo9WIRH9n7HGu2wg+y/SQgGYEo5a0hDTFtdZ+4Ww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770089502; c=relaxed/simple; bh=soXzKnhsQjPTTL1KYho9t5jG3TgZArfa21WuREO0/D0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=JoSihj29aGgj9kxiHQsp8fEr96AJsb5GxwE35vIM+NymD/DhEKzvITYmZNPD5SETguKQR16b7gggxr6QiNRH+uSerTLVnOXBqrUI3Uk6VKlqBGp0l2AMxrvAlFJQNvH3Bhh8uLvvrpQlmAuwfle/6QJ6fn1dfSf1k9/NbzkYtOM= 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 _____8DxAfEWbIFp3zwPAA--.49702S3; Tue, 03 Feb 2026 11:31:34 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJAxGMEVbIFpbtk+AA--.37628S3; Tue, 03 Feb 2026 11:31:34 +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 v3 1/4] LoongArch: KVM: Move LSX capability check in LSX exception handler Date: Tue, 3 Feb 2026 11:31:28 +0800 Message-Id: <20260203033131.3372834-2-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260203033131.3372834-1-maobibo@loongson.cn> References: <20260203033131.3372834-1-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: qMiowJAxGMEVbIFpbtk+AA--.37628S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" Like FPU exception handler, check LSX capability in LSX exception handler rather than kvm_own_lsx(). LSX capability in function kvm_guest_has_lsx() implies FPU capability in kvm_guest_has_fpu(), only check kvm_guest_has_lsx() is ok here. 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 cb493980d874..76eec3f24953 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -792,8 +792,10 @@ static long kvm_save_notify(struct kvm_vcpu *vcpu) */ static int kvm_handle_lsx_disabled(struct kvm_vcpu *vcpu, int ecode) { - if (kvm_own_lsx(vcpu)) + if (!kvm_guest_has_lsx(&vcpu->arch)) kvm_queue_exception(vcpu, EXCCODE_INE, 0); + else + kvm_own_lsx(vcpu); =20 return RESUME_GUEST; } diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 656b954c1134..aff295aa6b0b 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -1358,9 +1358,6 @@ void kvm_own_fpu(struct kvm_vcpu *vcpu) /* Enable LSX and restore context */ int kvm_own_lsx(struct kvm_vcpu *vcpu) { - if (!kvm_guest_has_fpu(&vcpu->arch) || !kvm_guest_has_lsx(&vcpu->arch)) - return -EINVAL; - preempt_disable(); =20 /* Enable LSX for guest */ --=20 2.39.3