From: Marc Zyngier <marc.zyngier@arm.com>
To: Christoffer Dall <christoffer.dall@linaro.org>
Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Subject: [PATCH v2 12/17] arm64: KVM: vgic-v2: Make GICD_SGIR quicker to hit
Date: Wed, 17 Feb 2016 16:40:44 +0000 [thread overview]
Message-ID: <1455727249-24752-13-git-send-email-marc.zyngier@arm.com> (raw)
In-Reply-To: <1455727249-24752-1-git-send-email-marc.zyngier@arm.com>
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 <marc.zyngier@arm.com>
---
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
next prev parent reply other threads:[~2016-02-17 16:40 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-17 16:40 [PATCH v2 00/17] KVM/ARM: Guest Entry/Exit optimizations Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 01/17] arm64: KVM: Switch the sys_reg search to be a binary search Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 02/17] ARM: KVM: Properly sort the invariant table Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 03/17] ARM: KVM: Enforce sorting of all CP tables Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 04/17] ARM: KVM: Rename struct coproc_reg::is_64 to is_64bit Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 05/17] ARM: KVM: Switch the CP reg search to be a binary search Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 06/17] KVM: arm/arm64: timer: Add active state caching Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 07/17] arm64: KVM: vgic-v2: Avoid accessing GICH registers Marc Zyngier
2016-03-02 23:08 ` Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 08/17] arm64: KVM: vgic-v2: Save maintenance interrupt state only if required Marc Zyngier
2016-03-02 23:08 ` Christoffer Dall
2016-03-03 8:28 ` Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 09/17] arm64: KVM: vgic-v2: Move GICH_ELRSR saving to its own function Marc Zyngier
2016-03-02 23:08 ` Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 10/17] arm64: KVM: vgic-v2: Do not save an LR known to be empty Marc Zyngier
2016-03-02 23:08 ` Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 11/17] arm64: KVM: vgic-v2: Only wipe LRs on vcpu exit Marc Zyngier
2016-03-02 23:08 ` Christoffer Dall
2016-03-03 8:14 ` Marc Zyngier
2016-03-03 15:58 ` Marc Zyngier
2016-03-04 11:36 ` Christoffer Dall
2016-03-04 11:45 ` Marc Zyngier
2016-02-17 16:40 ` Marc Zyngier [this message]
2016-03-02 23:08 ` [PATCH v2 12/17] arm64: KVM: vgic-v2: Make GICD_SGIR quicker to hit Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 13/17] arm64: KVM: vgic-v3: Avoid accessing ICH registers Marc Zyngier
2016-02-17 16:40 ` [PATCH v2 14/17] arm64: KVM: vgic-v3: Save maintenance interrupt state only if required Marc Zyngier
2016-03-03 19:21 ` Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 15/17] arm64: KVM: vgic-v3: Do not save an LR known to be empty Marc Zyngier
2016-03-03 19:21 ` Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 16/17] arm64: KVM: vgic-v3: Only wipe LRs on vcpu exit Marc Zyngier
2016-03-03 19:21 ` Christoffer Dall
2016-02-17 16:40 ` [PATCH v2 17/17] arm64: KVM: vgic-v3: Do not save ICH_AP0Rn_EL2 for GICv2 emulation Marc Zyngier
2016-03-03 19:21 ` Christoffer Dall
2016-03-04 8:54 ` Marc Zyngier
2016-02-29 0:57 ` [PATCH v2 00/17] KVM/ARM: Guest Entry/Exit optimizations Mihai Claudiu Caraman
2016-02-29 8:26 ` Marc Zyngier
2016-02-29 10:43 ` Mihai Claudiu Caraman
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