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| author | Eric Auger <eric.auger@redhat.com> | 2021-04-05 18:39:40 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-04-06 14:51:38 +0100 |
| commit | 28e9d4bce3be9b8fec6c854f87923db99c8fb874 (patch) | |
| tree | 78ebce0a0c541f16786c52ce58e4f47ca8e57281 /block/kyber-iosched.c | |
| parent | e5a35635464bc5304674b84ea42615a3fd0bd949 (diff) | |
KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace
Commit 23bde34771f1 ("KVM: arm64: vgic-v3: Drop the
reporting of GICR_TYPER.Last for userspace") temporarily fixed
a bug identified when attempting to access the GICR_TYPER
register before the redistributor region setting, but dropped
the support of the LAST bit.
Emulating the GICR_TYPER.Last bit still makes sense for
architecture compliance though. This patch restores its support
(if the redistributor region was set) while keeping the code safe.
We introduce a new helper, vgic_mmio_vcpu_rdist_is_last() which
computes whether a redistributor is the highest one of a series
of redistributor contributor pages.
With this new implementation we do not need to have a uaccess
read accessor anymore.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210405163941.510258-9-eric.auger@redhat.com
Diffstat (limited to 'block/kyber-iosched.c')
0 files changed, 0 insertions, 0 deletions