From: Anup Patel Date: Sun, 20 Oct 2024 19:47:27 +0000 (+0530) Subject: RISC-V: KVM: Don't setup SGEI for zero guest external interrupts X-Git-Tag: v6.13-rc1~97^2~16^2~9 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=15ff2ff3c3b99f986fde919dffab27007bbe35ed;p=thirdparty%2Fkernel%2Flinux.git 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 Reviewed-by: Atish Patra Link: https://lore.kernel.org/r/20241020194734.58686-7-apatel@ventanamicro.com Signed-off-by: Anup Patel --- diff --git a/arch/riscv/kvm/aia.c b/arch/riscv/kvm/aia.c index 17ae4a7c0e948..8ffae0330c89a 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); }