Re: [PATCH v2 2/3] powerpc/64: enhance memcmp() with VMX instruction for long bytes comparision

Hi Cyril, On Sat, Sep 23, 2017 at 12:06:48AM +1000, Cyril Bur wrote: > On Thu, 2017-09-21 at 07:34 +0800, wei.guo.si...@gmail.com wrote: > > From: Simon Guo > > > > This patch add VMX primitives to do memcmp() in case the compare size > > exceeds 4K bytes. > > > > Hi

Re: [PATCH] mm: fix RODATA_TEST failure "rodata_test: test data was not read only"

On Thu, Sep 21, 2017 at 2:37 AM, Christophe Leroy wrote: > On powerpc, RODATA_TEST fails with message the following messages: > > [6.199505] Freeing unused kernel memory: 528K > [6.203935] rodata_test: test data was not read only > > This is because GCC allocates

[RFC] powerpc: add sys_pkey_modify() system call

sys_pkey_modify() is powerpc specific system call. It enables the ability to modify *any* attribute of a key. Since powerpc disallows modification of IAMR from user space an application is unable to change a key's execute-attribute. This system call helps accomplish the above.

[PATCH] powerpc/mm: Call flush_tlb_kernel_range with interrupts enabled

flush_tlb_kernel_range() may call smp_call_function_many() which expects interrupts to be enabled. This results in a traceback. WARNING: CPU: 0 PID: 1 at kernel/smp.c:416 smp_call_function_many+0xcc/0x2fc CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.14.0-rc1-9-g0666f56 #1 task: cf83

Re: Traceback due to 'powerpc/mm: Fix kernel RAM protection...' when running ppc image in qemu

On 09/21/2017 11:44 AM, Christophe LEROY wrote: Le 20/09/2017 à 05:45, Guenter Roeck a écrit : On 09/19/2017 08:05 PM, Michael Ellerman wrote: Guenter Roeck writes: Hi, I see a the following traceback when running an SMP image based on 85xx/mpc85xx_cds_defconfig in