diff options
| author | Sai Pavan Boddu <sai.pavan.boddu@xilinx.com> | 2020-02-24 15:09:22 +0530 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-02-28 16:14:57 +0000 |
| commit | 11411489da890ae40c182be7fa745c647e8ce399 (patch) | |
| tree | d5dfccb3bf091f06dede10850f31029440ab0104 /include/hw | |
| parent | 5df2cfbc8b61e0c5d050a69814f713d2ba045ec5 (diff) | |
arm_gic: Mask the un-supported priority bits
The GICv2 allows the implementation to implement a variable number
of priority bits; unimplemented bits in the priority registers
are read as zeros, writes ignored. We were previously always
implementing a full 8 bits of priority, which is allowed but not
what the real hardware typically does (which is usually to have
4 or 5 bits of priority).
Add a new device property to allow the number of implemented
property bits to be specified.
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Message-id: 1582537164-764-2-git-send-email-sai.pavan.boddu@xilinx.com
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: improved commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/intc/arm_gic.h | 2 | ||||
| -rw-r--r-- | include/hw/intc/arm_gic_common.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/intc/arm_gic.h b/include/hw/intc/arm_gic.h index ed703a1720..303b9748cb 100644 --- a/include/hw/intc/arm_gic.h +++ b/include/hw/intc/arm_gic.h @@ -68,6 +68,8 @@ /* Number of SGI target-list bits */ #define GIC_TARGETLIST_BITS 8 +#define GIC_MAX_PRIORITY_BITS 8 +#define GIC_MIN_PRIORITY_BITS 4 #define TYPE_ARM_GIC "arm_gic" #define ARM_GIC(obj) \ diff --git a/include/hw/intc/arm_gic_common.h b/include/hw/intc/arm_gic_common.h index b5585fec45..6e0d6b8a88 100644 --- a/include/hw/intc/arm_gic_common.h +++ b/include/hw/intc/arm_gic_common.h @@ -96,6 +96,7 @@ typedef struct GICState { uint16_t priority_mask[GIC_NCPU_VCPU]; uint16_t running_priority[GIC_NCPU_VCPU]; uint16_t current_pending[GIC_NCPU_VCPU]; + uint32_t n_prio_bits; /* If we present the GICv2 without security extensions to a guest, * the guest can configure the GICC_CTLR to configure group 1 binary point |