[PATCH v12 2/6] KVM: Add generic support for dirty page logging

[Mario Smarduch]

On 10/30/2014 05:14 AM, Cornelia Huck wrote:
> On Wed, 22 Oct 2014 15:34:07 -0700
> Mario Smarduch <m.smarduch at samsung.com> wrote:
> 
>> This patch defines KVM_GENERIC_DIRTYLOG, and moves dirty log read function
>> to it's own file virt/kvm/dirtylog.c. x86 is updated to use the generic
>> dirty log interface, selecting KVM_GENERIC_DIRTYLOG in its Kconfig and 
>> makefile. No other architectures are affected, each uses it's own version.
>> This changed from previous patch revision where non-generic architectures 
>> were modified.
>>
>> In subsequent patch armv7 does samething. All other architectures continue
>> use architecture defined version.
>>
> 
> Hm.
> 
> "The x86 specific version of dirty page logging is generic enough to be
> used by other architectures, noteably ARMv7. So let's move the x86 code
> under virt/kvm/ and make it depend on KVM_GENERIC_DIRTYLOG. Other
> architectures continue to use their own implementations."
> 
> ?

I'll update descriptions for both patches, with the more concise
descriptions.

Thanks.

> 
>>
>> Signed-off-by: Mario Smarduch <m.smarduch at samsung.com>
>> ---
>>  arch/x86/include/asm/kvm_host.h |    3 --
>>  arch/x86/kvm/Kconfig            |    1 +
>>  arch/x86/kvm/Makefile           |    1 +
>>  arch/x86/kvm/x86.c              |   86 ------------------------------
>>  include/linux/kvm_host.h        |    4 ++
>>  virt/kvm/Kconfig                |    3 ++
>>  virt/kvm/dirtylog.c             |  112 +++++++++++++++++++++++++++++++++++++++
>>  7 files changed, 121 insertions(+), 89 deletions(-)
>>  create mode 100644 virt/kvm/dirtylog.c
>>
> 
>> diff --git a/virt/kvm/dirtylog.c b/virt/kvm/dirtylog.c
>> new file mode 100644
>> index 0000000..67ffffa
>> --- /dev/null
>> +++ b/virt/kvm/dirtylog.c
>> @@ -0,0 +1,112 @@
>> +/*
>> + * kvm generic dirty logging support, used by architectures that share
>> + * comman dirty page logging implementation.
> 
> s/comman/common/
> 
> The approach looks sane to me, especially as it does not change other
> architectures needlessly.
>