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target/arm: Provide cpu property for controling FEAT_LPA2

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There is a Linux kernel bug present until v5.12 that prevents
booting with FEAT_LPA2 enabled.  As a workaround for TCG, allow
the feature to be disabled from -cpu max.

Since this kernel bug is present in the Fedora 31 image that
we test in avocado, disable lpa2 on the command-line.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-03-01 11:59:57 -10:00 • committed by Peter Maydell
parent 99eb313ddb
commit 69b2265d5f
4 changed files with 36 additions and 1 deletions
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2
tests/avocado/boot_linux.py
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@ -79,6 +79,7 @@ class BootLinuxAarch64(LinuxTest):
"""
self.require_accelerator("tcg")
self.vm.add_args("-accel", "tcg")
self.vm.add_args("-cpu", "max,lpa2=off")
self.vm.add_args("-machine", "virt,gic-version=2")
self.add_common_args()
self.launch_and_wait(set_up_ssh_connection=False)
@ -91,6 +92,7 @@ class BootLinuxAarch64(LinuxTest):
"""
self.require_accelerator("tcg")
self.vm.add_args("-accel", "tcg")
self.vm.add_args("-cpu", "max,lpa2=off")
self.vm.add_args("-machine", "virt,gic-version=3")
self.add_common_args()
self.launch_and_wait(set_up_ssh_connection=False)