From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 21685134A8; Sat, 26 Apr 2025 10:02:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745661737; cv=none; b=jQ2mXp+4GlVuM3u2qZlfGkjWfamCYLYzgnh5M9An/fRnoZCVMUD4qb9bt9650A4WQB2ZX6uJSjJR/WP3gkoDWmFGmX59LSOpEwsMQFKZ8tOm+h1xZB4uGfDEUBej7znDf7jZQSe79HNPQzVafHZB6nCSj4ndR5gqz/k383pZxjw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745661737; c=relaxed/simple; bh=wYHPVCkX7MaZ2Hq9KQkLjKX+zqp6AH2eWz8cN+OxOo0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QKNhCg/oYgBIbyBNIEAFkNgov3cOe9bF44SuPNL7KEYOaR523r2q7IdyylNidYJ1ybJKKaEkRQMvugC9nAk9wZLkA0s7xTLKAQ4zJUBQCN709bNBhqH2WTYIIpScdVirtLiroWHl8HU74mf0LgqLalhClXS7opoJv0lzU7ZDa6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=gHgjDCY6; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="gHgjDCY6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=wYHPVCkX7MaZ2Hq9KQkLjKX+zqp6AH2eWz8cN+OxOo0=; b=gHgjDCY6KKznuUtl9/gyzewjW1 czrJKP0C+w9em+magoSJBsnbwnmB1FxAZclmVbGGGbwOtIh531oIzs4UZJOlanLTURQRMseXxXiFu piLjrkW3kQWgeQ4woZoP6j+Rx0c4mcXHryT4Ps9dGJ5bpBdoHTVP9rdChmQ7/MAyCEnxBUgPQOLXY OBZWxtbBb8ikuy/7Kxi9KXuvTZiNLyanvp0y+cAtdw9bxQjTujvVSliTASYz9pqeE6vzSfVh5akpa MUcXcxDRKM8jzdmqjTkfMNEsmBe0rHkJLHcW99+vYAx6mSXAr+F43uOk74W9Aa0U56quY5TCll6Li jzuQiggQ==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.1 #2 (Red Hat Linux)) id 1u8cLn-0000000CFRA-2LoI; Sat, 26 Apr 2025 10:01:35 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id EEC2E30035E; Sat, 26 Apr 2025 12:01:34 +0200 (CEST) Date: Sat, 26 Apr 2025 12:01:34 +0200 From: Peter Zijlstra To: Josh Poimboeuf Cc: x86@kernel.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, pawan.kumar.gupta@linux.intel.com, seanjc@google.com, pbonzini@redhat.com, ardb@kernel.org, kees@kernel.org, Arnd Bergmann , gregkh@linuxfoundation.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-efi@vger.kernel.org, samitolvanen@google.com, ojeda@kernel.org Subject: Re: [PATCH 3/6] x86/kvm/emulate: Avoid RET for fastops Message-ID: <20250426100134.GB4198@noisy.programming.kicks-ass.net> References: <20250414111140.586315004@infradead.org> <20250414113754.172767741@infradead.org> <7vfbchsyhlsvdl4hszdtmapdghw32nrj2qd652f3pjzg3yb6vn@po3bsa54b6ta> <20250415074421.GI5600@noisy.programming.kicks-ass.net> <20250416083859.GH4031@noisy.programming.kicks-ass.net> 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 In-Reply-To: <20250416083859.GH4031@noisy.programming.kicks-ass.net> On Wed, Apr 16, 2025 at 10:38:59AM +0200, Peter Zijlstra wrote: > Yeah, I finally got there. I'll go cook up something else. Sean, Paolo, can I once again ask how best to test this fastop crud?