[RFC PATCH-for-9.0 0/9] hw/xen: Have ARM targets use common xen_memory_listener - Philippe Mathieu-Daudé

From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Anthony Perard" <anthony.perard@citrix.com>,
	"Paul Durrant" <paul@xen.org>,
	"David Woodhouse" <dwmw@amazon.co.uk>,
	"Thomas Huth" <thuth@redhat.com>,
	qemu-arm@nongnu.org,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Alex Bennée" <alex.bennee@linaro.org>,
	xen-devel@lists.xenproject.org,
	"Philippe Mathieu-Daudé" <philmd@linaro.org>
Subject: [RFC PATCH-for-9.0 0/9] hw/xen: Have ARM targets use common xen_memory_listener
Date: Tue, 14 Nov 2023 17:31:14 +0100	[thread overview]
Message-ID: <20231114163123.74888-1-philmd@linaro.org> (raw)

Hi,

While looking at Xen target-specific code, I noticed some
generic code used by x86 which is not implemented for ARM.

Maybe ARM machines don't need it, I don't know. But I
wanted to see if I can get this common code target agnostic
and build it once, possibly bringing smth useful to ARM.

The changes don't break CI testing and Avocado local tests.
If this xen_memory_listener feature isn't required for ARM,
I'll send follow up patch that keep this series with common
xen_memory_listener but with a runtime flag to disable.

Patches do the usual "change target-specific API to a
target-agnostic one", in particular using "exec/target_page.h"
at runtime. Then non-x86 code is extracted, then merged to
the generic xen/xen-hvm-common.c.

Thoughts?

Regards,

Phil.

Based-on: <20231114143816.71079-1-philmd@linaro.org>

Philippe Mathieu-Daudé (9):
  hw/xen/hvm: Inline TARGET_PAGE_ALIGN() macro
  hw/xen/hvm: Propagate page_mask to a pair of functions
  hw/xen/hvm: Get target page size at runtime
  hw/xen/hvm: Expose xen_memory_listener declaration
  hw/xen/hvm: Expose xen_read_physmap() prototype
  hw/xen/hvm: Initialize xen_physmap QLIST in xen_read_physmap()
  hw/xen/hvm: Extract common code to xen-hvm-common.c
  hw/xen/hvm: Merge xen-hvm-common.c files
  hw/xen/hvm: Inline xen_arch_set_memory()

 include/hw/xen/xen-hvm-common.h |   5 +-
 hw/arm/xen_arm.c                |  24 --
 hw/i386/xen/xen-hvm.c           | 441 +----------------------------
 hw/xen/xen-hvm-common.c         | 474 +++++++++++++++++++++++++++++++-
 stubs/xen-hw-stub.c             |   4 -
 5 files changed, 468 insertions(+), 480 deletions(-)

-- 
2.41.0