From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B6F23090D5 for ; Wed, 3 Sep 2025 13:43:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756906992; cv=none; b=UDUuu2vsNBwOCacXNBlZZgwvFm0kAcOrUKVUd0d5AqLpAcQQsfoBKNkuwZww8MtxAPXxJ+vsztgp73EvG804fmSv/Q7m2yIMOooVw3W+89S3xLT5q6gjXyLLpjr1tX3qBn8855DuwPxlWcTjbQo7xEHe2fz0h4TMqbyzrZaBcO8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756906992; c=relaxed/simple; bh=rCcHklNzMjT3ObYYoA1HYxHvZ22SuN2f4sFmHo2Q/g8=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=Bq4Da/xGir10Ly+giIP2jVBnXbRkH8a79+eKw9uVy5MwyzqXTmGZxajFbkYO8GK6i91BZiAxuoApydcPAoFyITN73QuYElyK9fDXwebzEoRPjlSYgDFVbUGCqKem8YhIpHoJ915ryeyLTIs8AaG+qr+G2YsA3uk45NW+LkZ+Wt8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=C196qyKE; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="C196qyKE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756906989; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=lZow2sr3qeI2s2aQP3f5xOQJySmyimDKdnIivHlqvAo=; b=C196qyKEMO3mnbB9hux8sXNbfXqZRy7mifHzk3X7vB5vufUDBOSV5rw2PXBNSCiA/ENpxV HAqqEvXo2xZHwxyC79jPR81dUrbbGYtf5WhrVJbgg8phoKTxkTWopAuDPS0Pgb2PV8jq0K EZ6x+dSeUqM1seqSHJz7ydEZR1IKt2E= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-416-Ylu3DidlNkCBGBDWjTD_NQ-1; Wed, 03 Sep 2025 09:43:00 -0400 X-MC-Unique: Ylu3DidlNkCBGBDWjTD_NQ-1 X-Mimecast-MFC-AGG-ID: Ylu3DidlNkCBGBDWjTD_NQ_1756906977 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 64EB719560A1; Wed, 3 Sep 2025 13:42:56 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.45.226.52]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id 2D53E180044F; Wed, 3 Sep 2025 13:42:49 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Wed, 3 Sep 2025 15:41:34 +0200 (CEST) Date: Wed, 3 Sep 2025 15:41:26 +0200 From: Oleg Nesterov To: Borislav Petkov , Dave Hansen , Deepak Gupta , "H. Peter Anvin" , Ingo Molnar , Linus Torvalds , Mark Brown , Peter Zijlstra , Rick Edgecombe , Sohil Mehta , Thomas Gleixner Cc: linux-kernel@vger.kernel.org, x86@kernel.org Subject: [PATCH v3 0/1] x86/shstk: don't create the shadow stack for PF_USER_WORKERs Message-ID: <20250903134126.GA27641@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Dave, et al, please review. Our discussion with Rick was confusing and we can't convince each other. Perhaps this is my fault. So let me resend 4/5 from this series [PATCH v2 0/5] x86/fpu: don't abuse x86_task_fpu(PF_USER_WORKER) in .regset_get() paths https://lore.kernel.org/all/20250822153603.GA27103@redhat.com/ as a separate patch. I tried to update the changelog. Again, to me it looks like a simple cleanup which makes sense regardless, but please correct me if I am wrong. Oleg.