From patchwork Mon Mar 31 09:43:15 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 14033382 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1D29841AAC; Mon, 31 Mar 2025 09:43:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743414194; cv=none; b=X9RgjlM5weT2f+G+FeyGVGc2UW2QiNc8vvAJql/Fay9dzJRBj97k7MqG9ZmiBmfE9FmtNwIgdf2falp0xzX5c15Dsqml9MGx+n967INQHZzcL6ZBuoqhXjjXFg9xGTXr7EpBZaTO0k2XLk2F9qE3Z83zJZjHJjBY42qvnIS3ee0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743414194; c=relaxed/simple; bh=CWw3BSgdJaJ3aM49TjIBeWGDOaC5flgRBUWFQVXfwBI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=aYrEg/8dYdiSiHdueZNViLENTInQDKEES6a2YzjJe0qKI84ZqSzHc3AbIMhOwiagsl/irg8iaCM4fH6NQXgHHGX/OmVvtEaHS+A7Vi46crVujZdbVzgA4SeiQOZyjyW/sUaM8/figcaOLcAvIolzS1dJ3D7DvV6dgAPMmUu6hos= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.174]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4ZR5lN3g7jz13LF1; Mon, 31 Mar 2025 17:42:40 +0800 (CST) Received: from kwepemd200014.china.huawei.com (unknown [7.221.188.8]) by mail.maildlp.com (Postfix) with ESMTPS id AC75D140158; Mon, 31 Mar 2025 17:43:09 +0800 (CST) Received: from localhost.localdomain (10.50.165.33) by kwepemd200014.china.huawei.com (7.221.188.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Mon, 31 Mar 2025 17:43:08 +0800 From: Yicong Yang To: , , , , , , , , CC: , , , , , , , , , , Subject: [PATCH v2 1/6] arm64: Provide basic EL2 setup for FEAT_{LS64, LS64_V} usage at EL0/1 Date: Mon, 31 Mar 2025 17:43:15 +0800 Message-ID: <20250331094320.35226-2-yangyicong@huawei.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20250331094320.35226-1-yangyicong@huawei.com> References: <20250331094320.35226-1-yangyicong@huawei.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemd200014.china.huawei.com (7.221.188.8) From: Yicong Yang Instructions introduced by FEAT_{LS64, LS64_V} is controlled by HCRX_EL2.{EnALS, EnASR}. Configure all of these to allow usage at EL0/1. This doesn't mean these instructions are always available in EL0/1 if provided. The hypervisor still have the control at runtime. Signed-off-by: Yicong Yang --- arch/arm64/include/asm/el2_setup.h | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h index ebceaae3c749..0259941602c4 100644 --- a/arch/arm64/include/asm/el2_setup.h +++ b/arch/arm64/include/asm/el2_setup.h @@ -57,9 +57,19 @@ /* Enable GCS if supported */ mrs_s x1, SYS_ID_AA64PFR1_EL1 ubfx x1, x1, #ID_AA64PFR1_EL1_GCS_SHIFT, #4 - cbz x1, .Lset_hcrx_\@ + cbz x1, .Lskip_gcs_hcrx_\@ orr x0, x0, #HCRX_EL2_GCSEn +.Lskip_gcs_hcrx_\@: + /* Enable LS64, LS64_V if supported */ + mrs_s x1, SYS_ID_AA64ISAR1_EL1 + ubfx x1, x1, #ID_AA64ISAR1_EL1_LS64_SHIFT, #4 + cbz x1, .Lset_hcrx_\@ + orr x0, x0, #HCRX_EL2_EnALS + cmp x1, #ID_AA64ISAR1_EL1_LS64_LS64_V + b.lt .Lset_hcrx_\@ + orr x0, x0, #HCRX_EL2_EnASR + .Lset_hcrx_\@: msr_s SYS_HCRX_EL2, x0 .Lskip_hcrx_\@: