On 10/11/2022 11:48 AM, Greg Kroah-Hartman wrote:

On Tue, Oct 11, 2022 at 11:21:36AM -0700, Elliot Berman wrote:

quoted

On 10/11/2022 12:21 AM, Greg Kroah-Hartman wrote:

quoted

On Mon, Oct 10, 2022 at 05:08:30PM -0700, Elliot Berman wrote:

quoted

Add architecture-independent standard error codes, types, and macros for
Gunyah hypercalls.

Signed-off-by: Elliot Berman <redacted>
---
   MAINTAINERS                  |  1 +
   include/asm-generic/gunyah.h | 74 ++++++++++++++++++++++++++++++++++++
   2 files changed, 75 insertions(+)
   create mode 100644 include/asm-generic/gunyah.h

diff --git a/MAINTAINERS b/MAINTAINERS
index ef6de7599d98..4fe8cec61551 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS

@@ -8886,6 +8886,7 @@ L:	linux-arm-msm@vger.kernel.org
   S:	Supported
   F:	Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml
   F:	Documentation/virt/gunyah/
+F:	include/asm-generic/gunyah.h
   HABANALABS PCI DRIVER
   M:	Oded Gabbay <ogabbay@kernel.org>

diff --git a/include/asm-generic/gunyah.h b/include/asm-generic/gunyah.h
new file mode 100644
index 000000000000..64a02dd3b5ad
--- /dev/null
+++ b/include/asm-generic/gunyah.h

Why not include/linux/gunyah.h?  Why asm-generic?  This is not an
architecture.

My idea here is to differentiate between code that interacts with hypercalls
and code that uses the abstractions provided on top of those hypercalls.
include/asm-generic/gunyah.h contains architecture-independent definitions
for hypercalls. Hypercalls are architecture-specific.

For instance, I wanted to avoid a header file that mixes the definitions for
the message-queue mailbox with the hypercall definitions that the
message-queue mailbox driver itself uses.

I can put it all in include/linux/gunyah.h and delineate with some clear
comments, but I initially felt it would be better to have separate header
file.

Please put it all in one place, this is just one tiny driver and should
not abuse the asm-generic location at all, no one is only going to want
just this one file, they are going to need the whole thing or nothing.

Let's say when we do the RISC-V port for Gunyah, we may need to move it 
back to asm-generic then?

---Trilok Soni