Messages in this thread | | | Date | Sat, 03 Jun 2023 09:39:11 +0100 | From | Marc Zyngier <> | Subject | Re: [PATCH v2 01/11] KVM: arm64: initialize HCRX_EL2 |
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On Tue, 09 May 2023 15:22:25 +0100, Kristina Martsenko <kristina.martsenko@arm.com> wrote: > > ARMv8.7/9.2 adds a new hypervisor configuration register HCRX_EL2. > Initialize the register to a safe value (all fields 0), to be robust > against firmware that has not initialized it. This is also needed to > ensure that the register is reinitialized after a kexec by a future > kernel. > > In addition, move SMPME setup over to the new flags, as it would > otherwise get overridden. It is safe to set the bit even if SME is not > (uniformly) supported, as it will write to a RES0 bit (having no > effect), and SME will be disabled by the cpufeature framework. > (Similar to how e.g. the API bit is handled in HCR_HOST_NVHE_FLAGS.) > > Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
M.
-- Without deviation from the norm, progress is not possible.
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