From: Thomas Garnier <thgarnie@google.com>
Subject: [PATCH v2 18/27] xen: Adapt assembly for PIE support
Date: Tue, 13 Mar 2018 13:59:36 -0700
Message-ID: <20180313205945.245105-19-thgarnie@google.com>
References: <20180313205945.245105-1-thgarnie@google.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Cc: linux-arch@vger.kernel.org, kvm@vger.kernel.org, linux-pm@vger.kernel.org,
 x86@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
 virtualization@lists.linux-foundation.org, linux-sparse@vger.kernel.org,
 linux-crypto@vger.kernel.org, kernel-hardening@lists.openwall.com,
 xen-devel@lists.xenproject.org
To: Herbert Xu <herbert@gondor.apana.org.au>,
 "David S . Miller" <davem@davemloft.net>,
 Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
 "H . Peter Anvin" <hpa@zytor.com>, Peter Zijlstra <peterz@infradead.org>,
 Josh Poimboeuf <jpoimboe@redhat.com>,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 Kate Stewart <kstewart@linuxfoundation.org>,
 Thomas Garnier <thgarnie@google.com>, Arnd Bergmann <arnd@arndb.de>,
 Philippe Ombredanne <pombredanne@nexb.com>,
 Arnaldo Carvalho de Melo <acme@redhat.com>,
 Andrey Ryabinin <aryabinin@virtuozzo.com>,
 Matthias Kaehlcke <mka@chromium.org>, Kees Cook <keescook@chromium.org>,
 Tom Lendacky <thomas.lendacky@amd.com>,
 "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
 Andy Lutomirski <luto@kernel.org>,
 Dominik Brodowski <linux@dominikbrodowski.net>,
 Borislav Petkov <bp@alien8.de>, Borislav Petkov <bp@suse.de>,
 "Raf
In-Reply-To: <20180313205945.245105-1-thgarnie@google.com>
Errors-To: xen-devel-bounces@lists.xenproject.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xenproject.org>
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