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hw/arm/boot: Don't write secondary boot stub if using PSCI

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If we're using PSCI emulation to start secondary CPUs, there is no
point in writing the "secondary boot" stub code, because it will
never be used -- secondary CPUs start powered-off, and when powered
on are set to begin execution at the address specified by the guest's
power-on PSCI call, not at the stub.

Move the call to the hook that writes the secondary boot stub code so
that we can do it only if we're starting a Linux kernel and not using
PSCI.

(None of the users of the hook care about the ordering of its call
relative to anything else: they only use it to write a rom blob to
guest memory.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-14-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2022-01-27 15:46:36 +00:00
parent dc888dd43b
commit d4a29ed6db
2 changed files with 27 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/hw/arm/boot.h
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@ -70,6 +70,9 @@ struct arm_boot_info {
* boot loader/boot ROM code, and secondary_cpu_reset_hook() should
* perform any necessary CPU reset handling and set the PC for the
* secondary CPUs to point at this boot blob.
*
* These hooks won't be called if secondary CPUs are booting via
* emulated PSCI (see psci_conduit below).
*/
void (*write_secondary_boot)(ARMCPU *cpu,
const struct arm_boot_info *info);