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: 14033402 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 CED91C36017 for ; Mon, 31 Mar 2025 10:04:41 +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-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=COHb3DfwDqX3YFHLVRf/SfrCNEpmJ+1eBw/LdJJ0Z9g=; b=ySgQg/8qd5Rpr6KgEUBQvSOGsl tn1s1V7BiJafi2sH2qbm09d7OkCQNKXvBh03wZsSTCrsxSjZLmI356GS+uirlhiEpb25Eo/SrHEIq SR7UPPKjN3anBNZvV8Xlq6vMdntcj+vUwllt8pIsevsXuoY1IX5H1a+jZaAmc0ql6j2r6b+UrmI4P oFmmM1LX0g4zcFBoCgfAovOzmUQ6YU+WEKhSOMpXQMd6QcegFBWcp8GhfaFISETCYPnVHcIKBZc/s bC67CPJlbKMhLxRe7cDWFRnWK0AfiafgiHiN0gbKJihXnwsbsfd4xHQsgQ0PFzFHVMt9XH1f0Qlba oXY/xJ4Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.1 #2 (Red Hat Linux)) id 1tzC0F-0000000Hb4g-3zod; Mon, 31 Mar 2025 10:04:23 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.98.1 #2 (Red Hat Linux)) id 1tzBfo-0000000HXqd-36sB for linux-arm-kernel@lists.infradead.org; Mon, 31 Mar 2025 09:43:18 +0000 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> MIME-Version: 1.0 X-Originating-IP: [10.50.165.33] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemd200014.china.huawei.com (7.221.188.8) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250331_024316_965941_A10A5063 X-CRM114-Status: UNSURE ( 9.99 ) X-CRM114-Notice: Please train this message. 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 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_\@: