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[PULL,12/12] Deprecate KVM support for AArch32

Message ID 20200414162613.4479-13-peter.maydell@linaro.org
State New
Headers show
Series [PULL,01/12] osdep.h: Drop no-longer-needed Coverity workarounds | expand

Commit Message

Peter Maydell April 14, 2020, 4:26 p.m. UTC 
The Linux kernel has dropped support for allowing 32-bit Arm systems
to host KVM guests (kernel commit 541ad0150ca4aa663a2, which just
landed upstream in the 5.7 merge window).  Mark QEMU's support for
this configuration as deprecated, so that we can delete that support
code in 5.2.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
---
 docs/system/deprecated.rst | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index c633fe2beff..3142fac3865 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -336,6 +336,14 @@  The ``compat`` property used to set backwards compatibility modes for
 the processor has been deprecated. The ``max-cpu-compat`` property of
 the ``pseries`` machine type should be used instead.
 
+KVM guest support on 32-bit Arm hosts (since 5.0)
+'''''''''''''''''''''''''''''''''''''''''''''''''
+
+The Linux kernel has dropped support for allowing 32-bit Arm systems
+to host KVM guests as of the 5.7 kernel. Accordingly, QEMU is deprecating
+its support for this configuration and will remove it in a future version.
+Running 32-bit guests on a 64-bit Arm host remains supported.
+
 System emulator devices
 -----------------------