KVM cannot support multiple address spaces per CPU; if you try to
create more than one then cpu_address_space_init() will assert.
In the Arm CPU realize function, detect the configurations which
would cause us to need more than one AS, and cleanly fail the
realize rather than blundering on into the assertion. This
turns this:
$ qemu-system-aarch64 -enable-kvm -display none -cpu max -machine raspi3b
qemu-system-aarch64: ../../softmmu/physmem.c:747: cpu_address_space_init: Assertion `asidx == 0 || !kvm_enabled()' failed.
Aborted
into:
$ qemu-system-aarch64 -enable-kvm -display none -machine raspi3b
qemu-system-aarch64: Cannot enable KVM when guest CPU has EL3 enabled
and this:
$ qemu-system-aarch64 -enable-kvm -display none -machine mps3-an524
qemu-system-aarch64: ../../softmmu/physmem.c:747: cpu_address_space_init: Assertion `asidx == 0 || !kvm_enabled()' failed.
Aborted
into:
$ qemu-system-aarch64 -enable-kvm -display none -machine mps3-an524
qemu-system-aarch64: Cannot enable KVM when using an M-profile guest CPU
Fixes: https://gitlab.com/qemu-project/qemu/-/issues/528
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210816135842.25302-3-peter.maydell@linaro.org
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