Migrating active interrupts causes the active state to be lost
completely. This implements some additional bitmaps to track the active
state on the distributor and export this to user space.
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
With everything separated and prepared, we implement a model of a
GICv3 distributor and redistributors by using the existing framework
to provide handler functions for each register group.
Currently we limit the emulation to a model enforcing a single
security state, with SRE==1 (forcing system register access) and
ARE==1 (allowing more than 8 VCPUs).
We share some of the functions provided for GICv2 emulation, but take
the different ways of addressing (v)CPUs into account.
Save and restore is currently not implemented.
Similar to the split-off of the GICv2 specific code, the new emulation
code goes into a new file (vgic-v3-emul.c).
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
vgic.c is currently a mixture of generic vGIC emulation code and
functions specific to emulating a GICv2. To ease the addition of
GICv3 later, we create new header file vgic.h, which holds constants
and prototypes of commonly used functions.
Rename some identifiers to avoid name space clutter.
I removed the long-standing comment about using the kvm_io_bus API
to tackle the GIC register ranges, as it wouldn't be a win for us
anymore.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
-------
As the diff isn't always obvious here (and to aid eventual rebases),
here is a list of high-level changes done to the code:
* moved definitions and prototypes from vgic.c to vgic.h:
- VGIC_ADDR_UNDEF
- ACCESS_{READ,WRITE}_*
- vgic_init()
- vgic_update_state()
- vgic_kick_vcpus()
- vgic_get_vmcr()
- vgic_set_vmcr()
- struct mmio_range {} (renamed to struct kvm_mmio_range)
* removed static keyword and exported prototype in vgic.h:
- vgic_bitmap_get_reg()
- vgic_bitmap_set_irq_val()
- vgic_bitmap_get_shared_map()
- vgic_bytemap_get_reg()
- vgic_dist_irq_set_pending()
- vgic_dist_irq_clear_pending()
- vgic_cpu_irq_clear()
- vgic_reg_access()
- handle_mmio_raz_wi()
- vgic_handle_enable_reg()
- vgic_handle_set_pending_reg()
- vgic_handle_clear_pending_reg()
- vgic_handle_cfg_reg()
- vgic_unqueue_irqs()
- find_matching_range() (renamed to vgic_find_range)
- vgic_handle_mmio_range()
- vgic_update_state()
- vgic_get_vmcr()
- vgic_set_vmcr()
- vgic_queue_irq()
- vgic_kick_vcpus()
- vgic_init()
- vgic_v2_init_emulation()
- vgic_has_attr_regs()
- vgic_set_common_attr()
- vgic_get_common_attr()
- vgic_destroy()
- vgic_create()
* moved functions to vgic.h (static inline):
- mmio_data_read()
- mmio_data_write()
- is_in_range()
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
