Re: [Qemu-devel] [PATCH v7 0/4] Inter-VM shared memory device

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On 07/26/2010 04:46 PM, Cam Macdonell wrote:
On Mon, Jul 26, 2010 at 2:41 PM, Anthony Liguori<anthony@xxxxxxxxxxxxx>  wrote:
On 07/26/2010 03:27 PM, Avi Kivity wrote:
  On 07/26/2010 10:41 PM, Anthony Liguori wrote:
kvm_set_irqfd() is fine, it just needs to be ported.  It should be there
due to vhost though?

It should, but isn't.

qemu_ram_map() is more difficult.  I would think the better approach
would be to invert things.  Instead of a "give me a stable mapping that is
shared atomically with a guest to this ram region", I would go with "go
create a ram region with this preallocated memory" and then just assume that
afterwards, you can make use of it and it's exposed as atomic memory.
Isn't that what qemu_ram_map() does?
Yup, name is misleading.  I thought it was the equivalent of
cpu_physical_memory_map() but took a ram_addr_t instead of a target_ulong.
If I add it to my patch set, should I change the name to the suggested
qemu_ram_alloc_from_ptr() or keep it as is for consistency?

Please rename it.

Also, the current version of qemu_ram_map() in qemu-kvm.git uses the
DeviceState parameter.  Are Alex's DeviceState changes going into 0.13
for the qemu_ram_*() functions??

They're already there.

Regards,

Anthony Liguori

Cam

Regards,

Anthony Liguori

ram_addr_t qemu_ram_map(DeviceState *dev, const char *name,
                        ram_addr_t size, void *host)
'host' is your "this preallocated memory", no?



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