On Wed, Mar 02, 2016 at 12:19:23AM +0300, Yury Norov wrote: > On Thu, Feb 25, 2016 at 09:52:40AM +0000, Suzuki K Poulose wrote: > > This series add checks to make sure that the AArch32 state is > > supported before we process the 32bit ID registers. Also > > checks the same for COMPAT binary execution. > > > > (Painfully) applies on top of 4.5-rc5 + [1] + [2]. > > > > Or it is available here : > > git://linux-arm.org/linux-skp.git noaarch32/v2-4.5-rc5 > > > > [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-February/410556.html > > [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-January/401913.html > > > > Changes since V1: > > - Prevent changing the personality to PER_LINUX32 by adding > > wrapper for personality() syscall. > > - Add the check to KVM before initialising a AArch32 vcpu > > - Tested on hardware. > > > > Btw, linux32 doesn't complain when the personality() syscall fails to change > > to PER_LINUX32. You can verify the personality by running > > $ cat /proc/cpuinfo > > which would still list the 64bit features for the CPUs. > > Hi Suzuki, > > I have some troubles with access to appropriate hardware to test > it, but I didn't forget. > > Yury. Hi Suzuki, ubuntu@arm64:~$ uname -a Linux arm64 4.5.0-rc5-00019-g3e330b9 #76 SMP PREEMPT Wed Mar 2 17:46:57 MSK 2016 aarch64 aarch64 aarch64 GNU/Linux ubuntu@arm64:~$ cat /proc/cpuinfo processor : 0-47 BogoMIPS : 200.00 Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics CPU implementer : 0x43 CPU architecture: 8 CPU variant : 0x1 CPU part : 0x0a1 CPU revision : 0 ubuntu@arm64:~$ file readdir readdir: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, for GNU/Linux 2.6.32, BuildID[sha1]=aeebc12494450b55a2ab0d39ebd2e121e9085d5c, not stripped W/o 32_EL0: ubuntu@arm64:~$ ./readdir -bash: ./readdir: cannot execute binary file: Exec format error With 32_ELO but w/o your patchset: kernel just hangs (on 4.2 it printed errors, but it was other machine); With 32_EL0 and with your patchset: ubuntu@arm64:~$ ./readdir -bash: ./readdir: cannot execute binary file: Exec format error So, everything is looking OK. Tested-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> Yury. _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
