From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc.zyngier@arm.com (Marc Zyngier) Date: Wed, 17 Feb 2016 16:40:44 +0000 Subject: [PATCH v2 12/17] arm64: KVM: vgic-v2: Make GICD_SGIR quicker to hit In-Reply-To: <1455727249-24752-1-git-send-email-marc.zyngier@arm.com> References: <1455727249-24752-1-git-send-email-marc.zyngier@arm.com> Message-ID: <1455727249-24752-13-git-send-email-marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The GICD_SGIR register lives a long way from the beginning of the handler array, which is searched linearly. As this is hit pretty often, let's move it up. This saves us some precious cycles when the guest is generating IPIs. Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic-v2-emul.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/virt/kvm/arm/vgic-v2-emul.c b/virt/kvm/arm/vgic-v2-emul.c index 1390797..1b0bee0 100644 --- a/virt/kvm/arm/vgic-v2-emul.c +++ b/virt/kvm/arm/vgic-v2-emul.c @@ -321,6 +321,11 @@ static bool handle_mmio_sgi_clear(struct kvm_vcpu *vcpu, static const struct vgic_io_range vgic_dist_ranges[] = { { + .base = GIC_DIST_SOFTINT, + .len = 4, + .handle_mmio = handle_mmio_sgi_reg, + }, + { .base = GIC_DIST_CTRL, .len = 12, .bits_per_irq = 0, @@ -387,11 +392,6 @@ static const struct vgic_io_range vgic_dist_ranges[] = { .handle_mmio = handle_mmio_cfg_reg, }, { - .base = GIC_DIST_SOFTINT, - .len = 4, - .handle_mmio = handle_mmio_sgi_reg, - }, - { .base = GIC_DIST_SGI_PENDING_CLEAR, .len = VGIC_NR_SGIS, .handle_mmio = handle_mmio_sgi_clear, -- 2.1.4