diff options
Diffstat (limited to 'drivers/irqchip/irq-riscv-imsic-state.c')
| -rw-r--r-- | drivers/irqchip/irq-riscv-imsic-state.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-riscv-imsic-state.c b/drivers/irqchip/irq-riscv-imsic-state.c index b6cebfee9461..7566c8aa2d48 100644 --- a/drivers/irqchip/irq-riscv-imsic-state.c +++ b/drivers/irqchip/irq-riscv-imsic-state.c @@ -784,7 +784,7 @@ static int __init imsic_parse_fwnode(struct fwnode_handle *fwnode, int __init imsic_setup_state(struct fwnode_handle *fwnode, void *opaque) { - u32 i, j, index, nr_parent_irqs, nr_mmios, nr_handlers = 0; + u32 i, j, index, nr_parent_irqs, nr_mmios, nr_guest_files, nr_handlers = 0; struct imsic_global_config *global; struct imsic_local_config *local; void __iomem **mmios_va = NULL; @@ -878,6 +878,7 @@ int __init imsic_setup_state(struct fwnode_handle *fwnode, void *opaque) } /* Configure handlers for target CPUs */ + global->nr_guest_files = BIT(global->guest_index_bits) - 1; for (i = 0; i < nr_parent_irqs; i++) { rc = imsic_get_parent_hartid(fwnode, i, &hartid); if (rc) { @@ -918,6 +919,15 @@ int __init imsic_setup_state(struct fwnode_handle *fwnode, void *opaque) local->msi_pa = mmios[index].start + reloff; local->msi_va = mmios_va[index] + reloff; + /* + * KVM uses global->nr_guest_files to determine the available guest + * interrupt files on each CPU. Take the minimum number of guest + * interrupt files across all CPUs to avoid KVM incorrectly allocating + * an unexisted or unmapped guest interrupt file on some CPUs. + */ + nr_guest_files = (resource_size(&mmios[index]) - reloff) / IMSIC_MMIO_PAGE_SZ - 1; + global->nr_guest_files = min(global->nr_guest_files, nr_guest_files); + nr_handlers++; } |