diff options
| author | Guo Ren (Alibaba DAMO Academy) <guoren@kernel.org> | 2026-05-25 15:19:44 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2026-05-26 09:05:10 +0530 |
| commit | 59ebc16276c51fa3c462e5a0d21280249755502d (patch) | |
| tree | 313d084600a3bf239d1fd03a5eac302a58957037 /drivers/irqchip | |
| parent | 5eb6d68fe24dc856df173700958e90ac0f990333 (diff) | |
irqchip/riscv-imsic: Add nr_guest_files in per-HART local config
Add nr_guest_files in per-HART local config to represent the number of
guest files available on a particular HART whereas the nr_guest_files
in the global config represents the number of guest files available
across all HARTs.
This allows KVM RISC-V to use nr_guest_files from per-HART local
config for asymmetric big.Little systems.
Signed-off-by: Guo Ren (Alibaba DAMO Academy) <guoren@kernel.org>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260525094945.3721783-2-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-riscv-imsic-state.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/irqchip/irq-riscv-imsic-state.c b/drivers/irqchip/irq-riscv-imsic-state.c index e3ed874d89e7..b8d1bbbf42f7 100644 --- a/drivers/irqchip/irq-riscv-imsic-state.c +++ b/drivers/irqchip/irq-riscv-imsic-state.c @@ -920,13 +920,12 @@ int __init imsic_setup_state(struct fwnode_handle *fwnode, void *opaque) 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. + * KVM uses both local->nr_guest_files and global->nr_guest_files + * to determine the available guest interrupt files on each CPU. */ 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); + local->nr_guest_files = min((BIT(global->guest_index_bits) - 1), nr_guest_files); + global->nr_guest_files = min(global->nr_guest_files, local->nr_guest_files); nr_handlers++; } |