From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933282AbbEERGd (ORCPT ); Tue, 5 May 2015 13:06:33 -0400 Received: from mail-wg0-f45.google.com ([74.125.82.45]:35657 "EHLO mail-wg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760724AbbEEQ2F (ORCPT ); Tue, 5 May 2015 12:28:05 -0400 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Andy Lutomirski , Borislav Petkov , Dave Hansen , Fenghua Yu , "H. Peter Anvin" , Linus Torvalds , Oleg Nesterov , Thomas Gleixner Subject: [PATCH 013/208] x86/fpu: Rename fpu_alloc() to fpstate_alloc() Date: Tue, 5 May 2015 18:23:53 +0200 Message-Id: <1430843228-13749-14-git-send-email-mingo@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1430843228-13749-1-git-send-email-mingo@kernel.org> References: <1430843228-13749-1-git-send-email-mingo@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the fpu__*() namespace for fpstate_alloc() as well. Also add a comment about FPU state alignment. Reviewed-by: Borislav Petkov Cc: Andy Lutomirski Cc: Dave Hansen Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/include/asm/fpu-internal.h | 2 +- arch/x86/kernel/i387.c | 12 ++++++++---- arch/x86/kernel/process.c | 2 +- arch/x86/kvm/x86.c | 2 +- 4 files changed, 11 insertions(+), 7 deletions(-) diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h index bdbba1a4de69..88f584ab3463 100644 --- a/arch/x86/include/asm/fpu-internal.h +++ b/arch/x86/include/asm/fpu-internal.h @@ -569,7 +569,7 @@ static inline unsigned short get_fpu_mxcsr(struct task_struct *tsk) } } -extern int fpu_alloc(struct fpu *fpu); +extern int fpstate_alloc(struct fpu *fpu); static inline void fpu_free(struct fpu *fpu) { diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 05fcc90087b0..5f2feb63b72a 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -246,17 +246,21 @@ void fpu_finit(struct fpu *fpu) } EXPORT_SYMBOL_GPL(fpu_finit); -int fpu_alloc(struct fpu *fpu) +int fpstate_alloc(struct fpu *fpu) { if (fpu->state) return 0; + fpu->state = kmem_cache_alloc(task_xstate_cachep, GFP_KERNEL); if (!fpu->state) return -ENOMEM; + + /* The CPU requires the FPU state to be aligned to 16 byte boundaries: */ WARN_ON((unsigned long)fpu->state & 15); + return 0; } -EXPORT_SYMBOL_GPL(fpu_alloc); +EXPORT_SYMBOL_GPL(fpstate_alloc); /* * Allocate the backing store for the current task's FPU registers @@ -276,7 +280,7 @@ int fpstate_alloc_init(struct task_struct *curr) /* * Memory allocation at the first usage of the FPU and other state. */ - ret = fpu_alloc(&curr->thread.fpu); + ret = fpstate_alloc(&curr->thread.fpu); if (ret) return ret; @@ -310,7 +314,7 @@ static int fpu__unlazy_stopped(struct task_struct *child) /* * Memory allocation at the first usage of the FPU and other state. */ - ret = fpu_alloc(&child->thread.fpu); + ret = fpstate_alloc(&child->thread.fpu); if (ret) return ret; diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index e2220e38ff6d..7b54c81403d5 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -92,7 +92,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) dst->thread.fpu.state = NULL; task_disable_lazy_fpu_restore(dst); if (tsk_used_math(src)) { - int err = fpu_alloc(&dst->thread.fpu); + int err = fpstate_alloc(&dst->thread.fpu); if (err) return err; fpu_copy(dst, src); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index bfc396632ee8..28fa733bb1c6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7007,7 +7007,7 @@ int fx_init(struct kvm_vcpu *vcpu) { int err; - err = fpu_alloc(&vcpu->arch.guest_fpu); + err = fpstate_alloc(&vcpu->arch.guest_fpu); if (err) return err; -- 2.1.0