| Message ID | 20240719160913.342027-7-apatel@ventanamicro.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Accelerate KVM RISC-V when running as a guest | expand |
On Fri, Jul 19, 2024 at 9:09 AM Anup Patel <apatel@ventanamicro.com> wrote: > > 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> > --- > arch/riscv/kvm/aia.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > 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); > } > -- > 2.34.1 > Reviewed-by: Atish Patra <atishp@rivosinc.com>
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); }
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> --- arch/riscv/kvm/aia.c | 9 +++++++++ 1 file changed, 9 insertions(+)