Re: [PATCH] Add ability to drop pages through testdev

[Avi Kivity <avi@redhat.com>]

On 12/29/2010 11:55 AM, Gleb Natapov wrote:
> On Wed, Dec 29, 2010 at 11:50:48AM +0200, Avi Kivity wrote:
> >  On 12/22/2010 05:18 PM, Gleb Natapov wrote:
> >  >Signed-off-by: Gleb Natapov<gleb@redhat.com>
> >  >diff --git a/hw/testdev.c b/hw/testdev.c
> >  >index d1abf59..29df385 100644
> >  >--- a/hw/testdev.c
> >  >+++ b/hw/testdev.c
> >  >@@ -1,3 +1,4 @@
> >  >+#include<sys/mman.h>
> >  >   #include "hw.h"
> >  >   #include "qdev.h"
> >  >   #include "isa.h"
> >  >@@ -46,6 +47,16 @@ static uint32_t test_device_ioport_read(void *opaque, uint32_t addr)
> >  >       return test_device_ioport_data;
> >  >   }
> >  >
> >  >+static void test_device_flush_page(void *opaque, uint32_t addr, uint32_t data)
> >  >+{
> >  >+    target_phys_addr_t len = 4096;
> >  >+    void *a = cpu_physical_memory_map(data&   ~0xffful,&len, 0);
> >  >+
> >  >+    mprotect(a, 4096, PROT_NONE);
> >  >+    mprotect(a, 4096, PROT_READ|PROT_WRITE);
> >  >+    cpu_physical_memory_unmap(a, len, 0, 0);
> >  >+}
> >  >+
> >
> >  Icky.  This is much better done through the api tests.  Applied it
> >  so as not to spoil all the effort.
> >
> How would you do that there?

Set up all the state using the KVM_SET_REGS family, pointing to the 
instruction you want to test, and KVM_RUN that.  You can even queue 
exceptions and interrupts for complicated cases.

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