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| author | Anup Patel <apatel@ventanamicro.com> | 2024-10-20 21:47:27 +0200 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2024-10-28 12:13:53 +0100 |
| commit | 15ff2ff3c3b99f986fde919dffab27007bbe35ed (patch) | |
| tree | 0df89f563c5665983703600a510da77e6bd0a7a1 | |
| parent | RISC-V: KVM: Replace aia_set_hvictl() with aia_hvictl_value() (diff) | |
| download | linux-15ff2ff3c3b99f986fde919dffab27007bbe35ed.tar.xz linux-15ff2ff3c3b99f986fde919dffab27007bbe35ed.zip | |
RISC-V: KVM: Don't setup SGEI for zero guest external interrupts
No need to setup SGEI local interrupt when there are zero guest
external interrupts (i.e. zero HW IMSIC guest files).
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20241020194734.58686-7-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
| -rw-r--r-- | arch/riscv/kvm/aia.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/riscv/kvm/aia.c b/arch/riscv/kvm/aia.c index 17ae4a7c0e94..8ffae0330c89 100644 --- a/arch/riscv/kvm/aia.c +++ b/arch/riscv/kvm/aia.c @@ -499,6 +499,10 @@ static int aia_hgei_init(void) hgctrl->free_bitmap = 0; } + /* Skip SGEI interrupt setup for zero guest external interrupts */ + if (!kvm_riscv_aia_nr_hgei) + goto skip_sgei_interrupt; + /* Find INTC irq domain */ domain = irq_find_matching_fwnode(riscv_get_intc_hwnode(), DOMAIN_BUS_ANY); @@ -522,11 +526,16 @@ static int aia_hgei_init(void) return rc; } +skip_sgei_interrupt: return 0; } static void aia_hgei_exit(void) { + /* Do nothing for zero guest external interrupts */ + if (!kvm_riscv_aia_nr_hgei) + return; + /* Free per-CPU SGEI interrupt */ free_percpu_irq(hgei_parent_irq, &aia_hgei); } |