Commit 15ff2ff3 authored by Anup Patel's avatar Anup Patel Committed by Anup Patel
Browse files

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: default avatarAnup Patel <apatel@ventanamicro.com>
Reviewed-by: default avatarAtish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20241020194734.58686-7-apatel@ventanamicro.com


Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent 5d8f7ee9

arch/riscv/kvm/aia.c

+9 −0
Original line number Diff line number Diff line
@@ -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);

}