[8/8] meson: Remove support for Xen on 32-bit ARM hosts

Commit Message

Philippe Mathieu-Daudé Feb. 18, 2025, 4:26 p.m. UTC

Per Stefano:

  For ARM 32-bit, I do not think we ever had many deployments,
  as most are 64-bit. Even when there are deployments, they do
  not typically use QEMU, as QEMU is less important for Xen on
  ARM compared to x86.

The QEMU project only test to cross-build Xen on Aarch64 hosts
(see 84eda110792 ("gitlab-ci: Add Xen cross-build jobs").
Since 32-bit host aren't tested, simply remove the support there.

[*] https://lore.kernel.org/qemu-devel/alpine.DEB.2.22.394.2502031438170.11632@ubuntu-linux-20-04-desktop/
Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
While apparently running Xen on 32-bit hosts isn't straighforward
anymore (see [x]), we don't need to remove it ASAP, it is already
in the deprecation queue since commit 6d701c9bac1 ("meson:
Deprecate 32-bit host support").

[x] https://lore.kernel.org/qemu-devel/[e-mail]/
---
 docs/about/removed-features.rst | 5 +++++
 meson.build                     | 3 ---
 2 files changed, 5 insertions(+), 3 deletions(-)

Patch

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index c6616ce05e5..f6ea53acc8b 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -969,6 +969,11 @@  MIPS "Trap-and-Emulate" KVM support (removed in 8.0)
 The MIPS "Trap-and-Emulate" KVM host and guest support was removed
 from Linux in 2021, and is not supported anymore by QEMU either.
 
+Xen on 32-bit ARM hosts (removed in 10.0)
+'''''''''''''''''''''''''''''''''''''''''
+
+Untested for more than 4 years.
+
 System emulator machines
 ------------------------
 
diff --git a/meson.build b/meson.build
index 8ed10b6624e..7b80d8dff09 100644
--- a/meson.build
+++ b/meson.build
@@ -308,9 +308,6 @@  if cpu == 'x86'
   xen_targets = ['i386-softmmu']
 elif cpu == 'x86_64'
   xen_targets = ['i386-softmmu', 'x86_64-softmmu']
-elif cpu == 'arm'
-  # i386 emulator provides xenpv machine type for multiple architectures
-  xen_targets = ['i386-softmmu']
 elif cpu == 'aarch64'
   # i386 emulator provides xenpv machine type for multiple architectures
   xen_targets = ['i386-softmmu', 'x86_64-softmmu', 'aarch64-softmmu']