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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9ABB9C432BE for ; Wed, 25 Aug 2021 16:00:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 80E90613B1 for ; Wed, 25 Aug 2021 16:00:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241626AbhHYQBb (ORCPT ); Wed, 25 Aug 2021 12:01:31 -0400 Received: from mga14.intel.com ([192.55.52.115]:15524 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241415AbhHYQB1 (ORCPT ); Wed, 25 Aug 2021 12:01:27 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10087"; a="217271083" X-IronPort-AV: E=Sophos;i="5.84,351,1620716400"; d="scan'208";a="217271083" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2021 09:00:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,351,1620716400"; d="scan'208";a="494317214" Received: from chang-linux-3.sc.intel.com ([172.25.66.175]) by fmsmga008.fm.intel.com with ESMTP; 25 Aug 2021 09:00:41 -0700 From: "Chang S. Bae" To: bp@suse.de, luto@kernel.org, tglx@linutronix.de, mingo@kernel.org, x86@kernel.org Cc: len.brown@intel.com, lenb@kernel.org, dave.hansen@intel.com, thiago.macieira@intel.com, jing2.liu@intel.com, ravi.v.shankar@intel.com, linux-kernel@vger.kernel.org, chang.seok.bae@intel.com Subject: [PATCH v10 03/28] x86/fpu/xstate: Modify state copy helpers to handle both static and dynamic buffers Date: Wed, 25 Aug 2021 08:53:48 -0700 Message-Id: <20210825155413.19673-4-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210825155413.19673-1-chang.seok.bae@intel.com> References: <20210825155413.19673-1-chang.seok.bae@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Have all the functions copying XSTATE take a struct fpu * pointer in preparation for dynamic state buffer support. No functional change. Signed-off-by: Chang S. Bae Reviewed-by: Len Brown Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org --- Changes from v5: * Adjusted function prototype changes to the recent renamed on the new base. Changes from v3: * Updated the changelog. (Borislav Petkov) Changes from v2: * Updated the changelog with task->fpu removed. (Borislav Petkov) --- arch/x86/include/asm/fpu/xstate.h | 4 ++-- arch/x86/kernel/fpu/regset.c | 2 +- arch/x86/kernel/fpu/signal.c | 2 +- arch/x86/kernel/fpu/xstate.c | 12 ++++++------ 4 files changed, 10 insertions(+), 10 deletions(-) diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 109dfcc75299..ede166e9d3f2 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -136,8 +136,8 @@ extern void __init update_regset_xstate_info(unsigned int size, void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr); int xfeature_size(int xfeature_nr); -int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf); -int copy_sigframe_from_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf); +int copy_uabi_from_kernel_to_xstate(struct fpu *fpu, const void *kbuf); +int copy_sigframe_from_user_to_xstate(struct fpu *fpu, const void __user *ubuf); void xsaves(struct xregs_state *xsave, u64 mask); void xrstors(struct xregs_state *xsave, u64 mask); diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c index 66ed317ebc0d..49dd307003ec 100644 --- a/arch/x86/kernel/fpu/regset.c +++ b/arch/x86/kernel/fpu/regset.c @@ -164,7 +164,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, } fpu_force_restore(fpu); - ret = copy_uabi_from_kernel_to_xstate(&fpu->state.xsave, kbuf ?: tmpbuf); + ret = copy_uabi_from_kernel_to_xstate(fpu, kbuf ?: tmpbuf); out: vfree(tmpbuf); diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index 445c57c9c539..bec8c8046888 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -371,7 +371,7 @@ static int __fpu_restore_sig(void __user *buf, void __user *buf_fx, fpregs_unlock(); if (use_xsave() && !fx_only) { - ret = copy_sigframe_from_user_to_xstate(&fpu->state.xsave, buf_fx); + ret = copy_sigframe_from_user_to_xstate(fpu, buf_fx); if (ret) return ret; } else { diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 0fed7fbcf2e8..df39085e9d05 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -1089,10 +1089,10 @@ static int copy_from_buffer(void *dst, unsigned int offset, unsigned int size, return 0; } - -static int copy_uabi_to_xstate(struct xregs_state *xsave, const void *kbuf, +static int copy_uabi_to_xstate(struct fpu *fpu, const void *kbuf, const void __user *ubuf) { + struct xregs_state *xsave = &fpu->state.xsave; unsigned int offset, size; struct xstate_header hdr; u64 mask; @@ -1161,9 +1161,9 @@ static int copy_uabi_to_xstate(struct xregs_state *xsave, const void *kbuf, * format and copy to the target thread. This is called from * xstateregs_set(). */ -int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf) +int copy_uabi_from_kernel_to_xstate(struct fpu *fpu, const void *kbuf) { - return copy_uabi_to_xstate(xsave, kbuf, NULL); + return copy_uabi_to_xstate(fpu, kbuf, NULL); } /* @@ -1171,10 +1171,10 @@ int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf) * XSAVE[S] format and copy to the target thread. This is called from the * sigreturn() and rt_sigreturn() system calls. */ -int copy_sigframe_from_user_to_xstate(struct xregs_state *xsave, +int copy_sigframe_from_user_to_xstate(struct fpu *fpu, const void __user *ubuf) { - return copy_uabi_to_xstate(xsave, NULL, ubuf); + return copy_uabi_to_xstate(fpu, NULL, ubuf); } static bool validate_xsaves_xrstors(u64 mask) -- 2.17.1