Re: [kvm-unit-tests PATCH v3 16/17] powerpc/ppc64: add RTAS support

[Thomas Huth <thuth@redhat.com>]

On 15.02.2016 13:00, Andrew Jones wrote:
> On Mon, Feb 15, 2016 at 10:59:31AM +0100, Thomas Huth wrote:
>> On 13.02.2016 17:28, Andrew Jones wrote:
>>> Add enough RTAS support to start adding RTAS commands. Just add
>>> power-off for now.
>>>
>>> Signed-off-by: Andrew Jones <drjones@redhat.com>
>>> ---
>>>  lib/powerpc/asm/rtas.h  |  26 +++++++++
>>>  lib/powerpc/io.c        |   2 +
>>>  lib/powerpc/rtas.c      | 139 ++++++++++++++++++++++++++++++++++++++++++++++++
>>>  lib/ppc64/asm/rtas.h    |   1 +
>>>  powerpc/Makefile.common |   1 +
>>>  5 files changed, 169 insertions(+)
>>>  create mode 100644 lib/powerpc/asm/rtas.h
>>>  create mode 100644 lib/powerpc/rtas.c
>>>  create mode 100644 lib/ppc64/asm/rtas.h
>> ...
>>> diff --git a/lib/powerpc/rtas.c b/lib/powerpc/rtas.c
>>> new file mode 100644
>>> index 0000000000000..b6ae7391181f9
>>> --- /dev/null
>>> +++ b/lib/powerpc/rtas.c
>>> @@ -0,0 +1,139 @@
>>> +/*
>>> + * powerpc RTAS
>>> + *
>>> + * Copyright (C) 2016, Red Hat Inc, Andrew Jones <drjones@redhat.com>
>>> + *
>>> + * This work is licensed under the terms of the GNU LGPL, version 2.
>>> + */
>>> +#include <libcflat.h>
>>> +#include <libfdt/libfdt.h>
>>> +#include <devicetree.h>
>>> +#include <asm/spinlock.h>
>>> +#include <asm/hcall.h>
>>> +#include <asm/io.h>
>>> +#include <asm/rtas.h>
>>> +
>>> +#if defined(__powerpc64__)
>>> +struct func_ptr {
>>> +	unsigned long ptr;
>>> +	unsigned long toc;
>>> +};
>>> +static struct func_ptr rtas_entry_funcptr;
>>> +#endif
>>> +typedef void (*rtas_entry_t)(unsigned long);
>>> +static rtas_entry_t enter_rtas;
>>> +static struct rtas_args rtas_args;
>>> +static struct spinlock lock;
>>
>> I'd maybe name the lock variable "rtas_lock" instead (in case we ever
>> use more locks in this file, it's then more obvious what this lock is
>> about) ... but apart from that, and the bug in the sc1 loop that you
> 
> I'll rename lock, and v4 will have the size/4 fix.
> 
>> already mentioned, the patch looks fine to me.
> 
> Can I add your r-b?

Yes, with the two changes:

Reviewed-by: Thomas Huth <thuth@redhat.com>