From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52EC6C433EF for ; Fri, 3 Dec 2021 00:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377801AbhLCAkf (ORCPT ); Thu, 2 Dec 2021 19:40:35 -0500 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:38655 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377762AbhLCAkW (ORCPT ); Thu, 2 Dec 2021 19:40:22 -0500 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 6ADAE5C039B; Thu, 2 Dec 2021 19:36:59 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Thu, 02 Dec 2021 19:36:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flygoat.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm3; bh=NhgI1hRQ5vifG fVgWjP5Z76oNY2mpCU7A0+hURs6wqI=; b=XmGD0mjfJtRhrC6vQzi6JVfa4+FN+ /GveVlHegEFV4gETWdD31BK9mXW8Qx5pptRrf8G6YSgSsUNqKy1uev6NgUPKyG1F unACYFJ20yH8HtmimLzeJDxDUPE43h9zTOUpon9P9bUlOiyERRZ+mR0JyNhgtQBL xC3eJHj2uhK6Ou8ubPC4w+DXs2k1Rz6HJ0/N6MBJnWrHIlA2UZrdiCZ3nuoUAZ6t r3wTxg3pQ6PmKqoVUXC8htbBsqjZOtRz3nJSJDl4dft0HVHkoAlbj2mkK+52eQnV FeA6YIoioyDo9deILnJw/P2FHYvG81uO1DB3UXOCGLcaVmXrCIf79V4RQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=NhgI1hRQ5vifGfVgWjP5Z76oNY2mpCU7A0+hURs6wqI=; b=EgQR7wDu 3Tnu3XXQG/2jgkzpSDervpxrTGB8gPEoZBfvk1DBslQ8sI70U1RZnogTTK3gXS/1 En2X3Co5ne4xKuhxoUZEy3uQzbC5xKbhaPNbMy8RcAanx7RYCk3lSUVU7+XP05Br i8Mg5HH7I/SsbkNtYFqOgBLUwKp/nchKr/DQtg+SzTxOR3eQvDw2JRruhgD0yvBh CVbtfJ32BOfr4VYtPDAR99uAqZrUzIX4pPB5KMdDFMXZUFFrBqwds0HIh9Z+nc9T 5Lcjfb2UDx4ts22+fewSD4LLDPqo8CswiypmK4+nYoFKhrTJMGdK4jVo/ZI/x3jc Wpj/Ss/Z7k3cxw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrieeigddvgecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpeflihgrgihunhcujggrnhhguceojhhirgiguhhnrdihrghnghes fhhlhihgohgrthdrtghomheqnecuggftrfgrthhtvghrnhepjeeihffgteelkeelffduke dtheevudejvdegkeekjeefhffhhfetudetgfdtffeunecuvehluhhsthgvrhfuihiivgep vdenucfrrghrrghmpehmrghilhhfrhhomhepjhhirgiguhhnrdihrghnghesfhhlhihgoh grthdrtghomh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 2 Dec 2021 19:36:57 -0500 (EST) From: Jiaxun Yang To: x86@kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, chang.seok.bae@intel.com, linux-kernel@vger.kernel.org, Jiaxun Yang , Jiaxun Yang Subject: [RFC PATCH 09/10] x86/fpu: Split out XFEATURE_MASK_KERNEL_DYNAMIC Date: Fri, 3 Dec 2021 00:36:35 +0000 Message-Id: <20211203003636.11417-10-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211203003636.11417-1-jiaxun.yang@flygoat.com> References: <20211203003636.11417-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For now, we can have features that is not XFD entitled dynamically allocated on fxstate buffer. Split out XFEATURE_MASK_KERNEL_DYNAMIC, and make it depend on XSAVES (actually XSAVEC but os_xsave only generate compact format when XSAVES present). Signed-off-by: Jiaxun Yang --- arch/x86/include/asm/fpu/xstate.h | 3 +++ arch/x86/kernel/fpu/xstate.c | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index c46d3dd591bd..d3a8c0855a5d 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -49,6 +49,9 @@ /* Features which are dynamically enabled for a process on request */ #define XFEATURE_MASK_USER_DYNAMIC XFEATURE_MASK_XTILE_DATA +/* Features which are dynamically allocated only when in use */ +#define XFEATURE_MASK_KERNEL_DYNAMIC XFEATURE_MASK_XTILE_DATA + /* All currently supported supervisor features */ #define XFEATURE_MASK_SUPERVISOR_SUPPORTED (XFEATURE_MASK_PASID) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 4621b51d1b20..1837e379777f 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -875,7 +875,8 @@ void __init fpu__init_system_xstate(unsigned int legacy_size) /* Clean out dynamic features from default */ fpu_kernel_cfg.default_features = fpu_kernel_cfg.max_features; - fpu_kernel_cfg.default_features &= ~XFEATURE_MASK_USER_DYNAMIC; + if (cpu_feature_enabled(X86_FEATURE_XSAVES)) + fpu_kernel_cfg.default_features &= ~XFEATURE_MASK_USER_DYNAMIC; fpu_user_cfg.default_features = fpu_user_cfg.max_features; fpu_user_cfg.default_features &= ~XFEATURE_MASK_USER_DYNAMIC; -- 2.30.2