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hw/intc/arm_gicv3_its: Handle virtual interrupts in process_its_cmd()

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For GICv4, interrupt table entries read by process_its_cmd() may
indicate virtual LPIs which are to be directly injected into a VM.
Implement the ITS side of the code for handling this.  This is
similar to the existing handling of physical LPIs, but instead of
looking up a collection ID in a collection table, we look up a vPEID
in a vPE table.  As with the physical LPIs, we leave the rest of the
work to code in the redistributor device.

The redistributor half will be implemented in a later commit;
for now we just provide a stub function which does nothing.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-15-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2022-04-08 15:15:23 +01:00
parent 2d692e2b31
commit 469cf23bf8
4 changed files with 125 additions and 2 deletions
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17
hw/intc/gicv3_internal.h
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@ -527,6 +527,23 @@ MemTxResult gicv3_redist_write(void *opaque, hwaddr offset, uint64_t data,
void gicv3_dist_set_irq(GICv3State *s, int irq, int level);
void gicv3_redist_set_irq(GICv3CPUState *cs, int irq, int level);
void gicv3_redist_process_lpi(GICv3CPUState *cs, int irq, int level);
/**
* gicv3_redist_process_vlpi:
* @cs: GICv3CPUState
* @irq: (virtual) interrupt number
* @vptaddr: (guest) address of VLPI table
* @doorbell: doorbell (physical) interrupt number (1023 for "no doorbell")
* @level: level to set @irq to
*
* Process a virtual LPI being directly injected by the ITS. This function
* will update the VLPI table specified by @vptaddr and @vptsize. If the
* vCPU corresponding to that VLPI table is currently running on
* the CPU associated with this redistributor, directly inject the VLPI
* @irq. If the vCPU is not running on this CPU, raise the doorbell
* interrupt instead.
*/
void gicv3_redist_process_vlpi(GICv3CPUState *cs, int irq, uint64_t vptaddr,
int doorbell, int level);
void gicv3_redist_lpi_pending(GICv3CPUState *cs, int irq, int level);
/**
* gicv3_redist_update_lpi: