From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Lutomirski Subject: [PATCH 0/2] x86_64, xen: Simplify Xen SYSCALL handling Date: Sun, 26 Jul 2015 16:29:08 -0700 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: X86 ML , "xen-devel@lists.xen.org" , Andrew Cooper Cc: Boris Ostrovsky , Andy Lutomirski , Borislav Petkov , "linux-kernel@vger.kernel.org" , Steven Rostedt List-Id: xen-devel@lists.xenproject.org Xen's SYSCALL hooks are overcomplicated and add unnecessary places where RSP is user controlled. Simplify it and get rid of those user RSP code paths under Xen. Tested as an Intel KVM guest. Not tested under Xen or on AMD, both of which are important. Andy Lutomirski (2): x86/entry/64: Rearrange SYSCALL entry points for Xen's benefit x86/xen/64: Rearrange the SYSCALL entries arch/x86/entry/entry_64.S | 29 +++++++++++++++-------------- arch/x86/entry/entry_64_compat.S | 12 +++++++----- arch/x86/xen/xen-asm_64.S | 24 ++++++++++-------------- 3 files changed, 32 insertions(+), 33 deletions(-) -- 2.4.3