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 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E57A0C19F2A for ; Thu, 11 Aug 2022 19:59:53 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.385155.620687 (Exim 4.92) (envelope-from ) id 1oMELC-00024U-MA; Thu, 11 Aug 2022 19:59:38 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 385155.620687; Thu, 11 Aug 2022 19:59:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1oMELC-00024N-II; Thu, 11 Aug 2022 19:59:38 +0000 Received: by outflank-mailman (input) for mailman id 385155; Thu, 11 Aug 2022 19:59:37 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1oMELB-00024H-6L for xen-devel@lists.xenproject.org; Thu, 11 Aug 2022 19:59:37 +0000 Received: from esa3.hc3370-68.iphmx.com (esa3.hc3370-68.iphmx.com [216.71.145.155]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 1e4f691f-19b0-11ed-bd2e-47488cf2e6aa; Thu, 11 Aug 2022 21:59:35 +0200 (CEST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 1e4f691f-19b0-11ed-bd2e-47488cf2e6aa DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1660247975; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=1wTTAmkP1sTOy6uXkQm9Y1aQZWYNUG4XBsWtqt3+8t4=; b=frCObnwjJfi7q3pUjuqdCABYrg2aYmOcieEJ9kANF1kVw0n2EpLoOV7r E9zMO5Ldr2LZErMt1Awa9Cs0g8auSp6/QbM8o7ISPfbzbNMvLwhShZqLY G9nibvemFPu/N+746SDcSY6V+JZ9TggvWwPSB/WtupYnvkKgabxwUaTM8 Y=; Authentication-Results: esa3.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none X-SBRS: 2.7 X-MesageID: 77908203 X-Ironport-Server: esa3.hc3370-68.iphmx.com X-Remote-IP: 162.221.156.83 X-Policy: $RELAYED IronPort-Data: A9a23:AfLOg6sHA8oEIKBIWY/Uk4Hc4ufnVDheMUV32f8akzHdYApBsoF/q tZmKW6GPPqONGD8fIpyPNm+8h4P75HRzdBqTAE+/3gyFioW+JbJXdiXEBz9bniYRiHhoOOLz Cm8hv3odp1coqr0/0/1WlTZhSAgk/vOHtIQMcacUghpXwhoVSw9vhxqnu89k+ZAjMOwRgiAo rsemeWGULOe82MyYzl8B56r8ks15qyi4WpA5DTSWNgQ1LPgvyhNZH4gDfnZw0vQGuF8AuO8T uDf+7C1lkuxE8AFU47Nfh7TKyXmc5aKVeS8oiM+t5uK23CukhcawKcjXMfwXG8M49m/c3Kd/ /0W3XC4YV9B0qQhA43xWTEAe811FfUuFLMqvRFTGCFcpqHLWyKE/hlgMK05FZ8opPxQBkdkz 9M3JAIvQQqloLmy/ZvuH4GAhux7RCXqFIYWu3UmxjDFF/c2B5vERs0m5/cBgm123JoXW6+DO YxJMlKDbzyZC/FLEn4RBIgzg6GDgX7nficDgFmUubA28y7YywkZPL3Fb4WEIozQHZ49ckCw/ GaZ223bOAEmMuez2GvU21fylOv3pHauMG4VPOLhraM76LGJ/UQMDDUGWF39puO24maccd9CL 00f+gI1sLM/skesS7HVTxC+5XKJoBMYc95RCPEhrhGAzLLO5ASUDXRCSSROAOHKr+dvG2Zsj AXQ2Yq0W3o/69V5VE5x6J+GnW2oHi8zB1UtSiM2byQfxf64pLwa20enoslYLEKlsjHkMWiun WjS/Xdn3ut7Yd0jjPviow2e6964jt2QF1NuuF2KNo6wxlkhDLNJcbBE/rQyARxoCI+CBmeMs 3Ef8yR1xLBfVMrd/MBhrQhkIV1I2xpmGGeF6bKXN8N9nwlBAlb6FWyq3BlwJV1yLuEPciLzb UnYtGt5vcENZCL3M/InOd3hUqzGKJQM8vy7Ps04k/IUOsQhHON51HgGibGsM5DFzxF3zPBX1 WazesewF3cKYZlaIM6Nb75EidcDm3FhrV4/sLihkHxLJ5LCOyPOIVrEWXPSBt0EAFSs+lWIq okFZ5TRln2ykoTWO0HqzGLaFnhSRVBTOHw8g5U/mjKrSua+JFwcNg== IronPort-HdrOrdr: A9a23:ZiDIIqy1oD0e+t7Hb8Q8KrPwIL1zdoMgy1knxilNoRw8SKKlfq eV7ZMmPH7P+VIssR4b+exoVJPtfZq+z+8R3WByB8bAYOCOggLBR+sO0WKL+UyHJ8SUzI9gPM lbHJSWcOeAb2RHsQ== X-IronPort-AV: E=Sophos;i="5.93,230,1654574400"; d="scan'208";a="77908203" From: Andrew Cooper To: Xen-devel CC: Andrew Cooper , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Wei Liu Subject: [PATCH 0/2] x86/spec-ctrl: Reduce HVM RAS overhead Date: Thu, 11 Aug 2022 20:59:03 +0100 Message-ID: <20220811195905.7780-1-andrew.cooper3@citrix.com> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit This is a optimsiation discovered while working on Retbleed. Andrew Cooper (2): x86/svm: Remove regs param from asm-called functions x86/svm: Keep the RAS balanced for guests xen/arch/x86/hvm/svm/entry.S | 58 ++++++++++++++++++++++++++++++++++++---- xen/arch/x86/hvm/svm/nestedsvm.c | 3 ++- xen/arch/x86/hvm/svm/svm.c | 6 +++-- 3 files changed, 59 insertions(+), 8 deletions(-) -- 2.11.0