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| author |   Eric Auger <eric.auger@redhat.com> | 2017-03-23 15:14:00 +0100 |
|---|---|---|
| committer |   Christoffer Dall <cdall@linaro.org> | 2017-05-08 14:35:16 +0200 |
| commit | ab01c6bdacc43c41c6b326889f4358f5afc38bf9 (patch) | |
| tree | e56e3df3084d1cdf41a475259c0456719c7af954 /include/linux/irqchip | |
| parent | KVM: arm64: vgic-its: Introduce migration ABI infrastructure (diff) | |
| download | linux-dev-ab01c6bdacc43c41c6b326889f4358f5afc38bf9.tar.xz linux-dev-ab01c6bdacc43c41c6b326889f4358f5afc38bf9.zip | |
KVM: arm64: vgic-its: Implement vgic_mmio_uaccess_write_its_iidr
The GITS_IIDR revision field is used to encode the migration ABI
revision. So we need to restore it to check the table layout is
readable by the destination.
By writing the IIDR, userspace thus forces the ABI revision to be
used and this must be less than or equal to the max revision KVM
supports.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'include/linux/irqchip')
| -rw-r--r-- | include/linux/irqchip/arm-gic-v3.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 81ebe437ccc3..2eaea308f003 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -242,6 +242,11 @@ #define GITS_TYPER_PTA (1UL << 19) #define GITS_TYPER_HWCOLLCNT_SHIFT 24 +#define GITS_IIDR_REV_SHIFT 12 +#define GITS_IIDR_REV_MASK (0xf << GITS_IIDR_REV_SHIFT) +#define GITS_IIDR_REV(r) (((r) >> GITS_IIDR_REV_SHIFT) & 0xf) +#define GITS_IIDR_PRODUCTID_SHIFT 24 + #define GITS_CBASER_VALID (1ULL << 63) #define GITS_CBASER_SHAREABILITY_SHIFT (10) #define GITS_CBASER_INNER_CACHEABILITY_SHIFT (59) |