On Tue, Jan 08, 2019 at 06:11:11PM -0800, r...@google.com wrote: > From: Roman Kiryanov <r...@google.com> > > A driver for the Goldfish Android emulator that occupies > address space to use it with the memory sharing device > on the QEMU side. The memory sharding device allocates > subranges and populate them with actual RAM. > This allows sharing host's memory with the guest. > > Signed-off-by: Roman Kiryanov <r...@google.com> > --- > Changes in v3: > - No changes. > > Changes in v2: > - Removed WARN_ON. > - Moved to drivers/platform/goldfish (from drivers/misc). > > drivers/platform/goldfish/Kconfig | 9 + > drivers/platform/goldfish/Makefile | 1 + > .../goldfish/goldfish_address_space.c | 666 ++++++++++++++++++ > .../linux/goldfish/goldfish_address_space.h | 27 + > 4 files changed, 703 insertions(+) > create mode 100644 drivers/platform/goldfish/goldfish_address_space.c > create mode 100644 include/uapi/linux/goldfish/goldfish_address_space.h > > diff --git a/drivers/platform/goldfish/Kconfig > b/drivers/platform/goldfish/Kconfig > index 74fdfa68d1f2..60ecec4a3c59 100644 > --- a/drivers/platform/goldfish/Kconfig > +++ b/drivers/platform/goldfish/Kconfig > @@ -16,4 +16,13 @@ config GOLDFISH_PIPE > This is a virtual device to drive the QEMU pipe interface used by > the Goldfish Android Virtual Device. > > +config GOLDFISH_ADDRESS_SPACE > + tristate "A Goldfish driver that talks to the memory sharing device in > QEMU" > + depends on PCI > + depends on GOLDFISH > + help > + A Goldfish driver that allocates address space ranges in the guest to > + populate them later in the host. This allows sharing host's memory > + with the guest.
How does QEMU do this today? There isn't a virtio or some other virtual memory device that allows memory regions to be shared? I can't believe that there isn't one yet. If not, then this should be some kind of "generic" QEMU memory device, not a "goldfish" specific one, right? Please work with the QEMU developers on this, I need their ack before I can take something like this. thanks, greg k-h
