Re: [Qemu-devel] [PATCH] kvm: align ram_size to page boundary

[Avi Kivity <avi@redhat.com>]

On 06/17/2012 02:03 PM, Jan Kiszka wrote:
> On 2012-06-17 10:47, Avi Kivity wrote:
>> kvm is not able to execute out of partial pages; align the RAM size
>> so partial pages aren't present.
>> 
>> Reported-by: Michael Tokarev <mjt@tls.msk.ru>
>> Signed-off-by: Avi Kivity <avi@redhat.com>
>> ---
>>  kvm-all.c |    2 ++
>>  1 file changed, 2 insertions(+)
>> 
>> diff --git a/kvm-all.c b/kvm-all.c
>> index 4ea7d85..482768f 100644
>> --- a/kvm-all.c
>> +++ b/kvm-all.c
>> @@ -1311,6 +1311,8 @@ int kvm_init(void)
>>  
>>      cpu_interrupt_handler = kvm_handle_interrupt;
>>  
>> +    ram_size = TARGET_PAGE_ALIGN(ram_size);
>> +
>>      return 0;
>>  
>>  err:
> 
> I think this should rather go into generic code. 

To be honest, I put this in kvm-specific code because vl.c doesn't have
TARGET_PAGE_ALIGN.  Maybe we should have machine->page_size or
machine->ram_alignment.

> What sense does it make
> to have partial pages with TCG?

Why impose an artificial restriction?

(answer: to reduce differences among various accelerators)

-- 
error compiling committee.c: too many arguments to function