From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1033088AbbKFJAq (ORCPT ); Fri, 6 Nov 2015 04:00:46 -0500 Received: from mga01.intel.com ([192.55.52.88]:18301 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032020AbbKFJAo (ORCPT ); Fri, 6 Nov 2015 04:00:44 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,251,1444719600"; d="scan'208";a="679552388" From: Huaitong Han To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com Cc: dave.hansen@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, Huaitong Han Subject: [PATCH] x86/fpu: Fix get_xsave_addr which returns error pointer to KVM Date: Fri, 6 Nov 2015 17:00:23 +0800 Message-Id: <1446800423-21622-1-git-send-email-huaitong.han@intel.com> X-Mailer: git-send-email 2.4.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org when KVM uses the get_xsave_addr, xsave parameter belongs to guest vcpu, if xsave is replaced with current task (host) xsave, get_xsave_addr will return error xsave addr to KVM. Signed-off-by: Huaitong Han --- arch/x86/kernel/fpu/xstate.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 62fc001..2c4ac07 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -402,7 +402,6 @@ void *get_xsave_addr(struct xregs_state *xsave, int xstate_feature) if (!boot_cpu_has(X86_FEATURE_XSAVE)) return NULL; - xsave = ¤t->thread.fpu.state.xsave; /* * We should not ever be requesting features that we * have not enabled. Remember that pcntxt_mask is -- 2.4.3