On Tue, 17 Nov 2020 23:16:29 +0800, Zenghui Yu wrote:
> It was recently reported that if GICR_TYPER is accessed before the RD base
> address is set, we'll suffer from the unset @rdreg dereferencing. Oops...
>
> gpa_t last_rdist_typer = rdreg->base + GICR_TYPER +
> (rdreg->free_index - 1) * KVM_VGIC_V3_REDIST_SIZE;
>
> It's "expected" that users will access registers in the redistributor if
> the RD has been properly configured (e.g., the RD base address is set). But
> it hasn't yet been covered by the existing documentation.
>
> [...]
Applied to kvm-arm64/fixes-5.10, thanks!
[1/1] KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace
commit: 23bde34771f1ea92fb5e6682c0d8c04304d34b3b
I have added a Cc stable, as this definitely wants to be backported.
Cheers,
M.
--
Without deviation from the norm, progress is not possible.
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