From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42083) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aK5rO-0002JG-6F for qemu-devel@nongnu.org; Fri, 15 Jan 2016 10:00:23 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aK5rK-0001kZ-Vl for qemu-devel@nongnu.org; Fri, 15 Jan 2016 10:00:18 -0500 Received: from e06smtp15.uk.ibm.com ([195.75.94.111]:44754) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aK5rK-0001kF-Lu for qemu-devel@nongnu.org; Fri, 15 Jan 2016 10:00:14 -0500 Received: from localhost by e06smtp15.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 15 Jan 2016 15:00:12 -0000 From: Greg Kurz Date: Fri, 15 Jan 2016 16:00:05 +0100 Message-ID: <20160115150005.17358.43294.stgit@bahia.huguette.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] [PATCH 0/7] target-ppc: gdbstub: endiannes fixes and VSX support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexander Graf , David Gibson Cc: Paolo Bonzini , qemu-ppc@nongnu.org, Anton Blanchard , qemu-devel@nongnu.org Hi, This series was posted before last Xmas. Since I am not sure if Alex is available to handle this, and this affects ppc64le (hence most people running sPAPR guests), I repost with David Gibson added to the Cc: list. This series is a sequel to Anton's tentative at bringing VSX support in our gdbstub: http://patchwork.ozlabs.org/patch/453758/ Indeed, FP, SPE and Altivec registers need to be copied to memory with the appropriate ordering, like we already do for core registers. This series reuses the maybe_bswap_register() helper to do the job, since it already handles the user mode case where the target endianness is known at build time and don't need byteswap. This is covered by patches 2 to 6. For these to work, two bugs that break FP/VR/VSX synchronization between QEMU and KVM had to be addressed. First one is a bug in KVM, that completely breaks the KVM_GET_ONE_REG and KVM_SET_ONE_REG ioctls for Altivec registers. The fix is already in Paul Mackerras' tree at: http://git.kernel.org/cgit/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next&id=b4d7f161feb3015d6306e1d35b565c888ff70c9d Second one is a bug in QEMU that breaks synchronisation with KVM for FP, Altivec and VSX registers on little-endian hosts. I pushed the fix to patch 1 since it is needed for the gdbstub fixes to actually work, but it could even be handled separately. And finally, patch 7 is Anton's + the byteswapping for little-endian guests. Cheers. --- Anton Blanchard (1): target-ppc: gdbstub: Add VSX support Greg Kurz (6): target-ppc: kvm: fix floating point registers sync on little-endian hosts target-ppc: rename and export maybe_bswap_register() target-ppc: gdbstub: fix float registers for little-endian guests target-ppc: gdbstub: introduce avr_need_swap() target-ppc: gdbstub: fix altivec registers for little-endian guests target-ppc: gdbstub: fix spe registers for little-endian guests configure | 6 ++- gdb-xml/power-vsx.xml | 44 +++++++++++++++++++++++ target-ppc/cpu.h | 1 + target-ppc/gdbstub.c | 10 +++-- target-ppc/kvm.c | 12 ++++++ target-ppc/translate_init.c | 84 +++++++++++++++++++++++++++++++++++-------- 6 files changed, 134 insertions(+), 23 deletions(-) create mode 100644 gdb-xml/power-vsx.xml