On Sat, Nov 08, 2014 at 08:44:42AM -0800, Andy Lutomirski wrote:
On Sat, Nov 8, 2014 at 8:00 AM, Andy Lutomirski l...@amacapital.net wrote:
On Nov 8, 2014 4:01 AM, Gleb Natapov g...@kernel.org wrote:
On Fri, Nov 07, 2014 at 09:59:55AM -0800, Andy Lutomirski wrote:
On Thu, Nov 6, 2014 at
Razya Ladelsky/Haifa/IBM@IBMIL wrote on 29/10/2014 02:38:31 PM:
From: Razya Ladelsky/Haifa/IBM@IBMIL
To: m...@redhat.com
Cc: Razya Ladelsky/Haifa/IBM@IBMIL, Alex Glikson/Haifa/IBM@IBMIL,
Eran Raichstein/Haifa/IBM@IBMIL, Yossi Kuperman1/Haifa/IBM@IBMIL,
Joel Nider/Haifa/IBM@IBMIL,
On Sun, Nov 9, 2014 at 12:52 AM, Gleb Natapov g...@kernel.org wrote:
On Sat, Nov 08, 2014 at 08:44:42AM -0800, Andy Lutomirski wrote:
On Sat, Nov 8, 2014 at 8:00 AM, Andy Lutomirski l...@amacapital.net wrote:
On Nov 8, 2014 4:01 AM, Gleb Natapov g...@kernel.org wrote:
On Fri, Nov 07, 2014
Hi Andy,
On Fri, Nov 07, 2014 at 06:25:18PM -0800, Andy Lutomirski wrote:
At least on Sandy Bridge, letting the CPU switch IA32_EFER is much
faster than switching it manually.
I benchmarked this using the vmexit kvm-unit-test (single run, but
GOAL multiplied by 5 to do more iterations):
Test
VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
intervention when guest is running in non-root mode.
You can find the VT-d Posted-Interrtups Spec. in
Update Posted-Interrupts descriptor according to the
following rules:
- Before VCPU block, set 'NV' to POSTED_INTR_WAKEUP_VECTOR
- After VCPU block, set 'NV' back to POSTED_INTR_VECTOR
Signed-off-by: Feng Wu feng...@intel.com
---
arch/x86/include/asm/kvm_host.h |5 ++
arch/x86/kvm/vmx.c
This patch adds three helper functions to manipulate the Posted-
Interrtups Decriptor.
Signed-off-by: Feng Wu feng...@intel.com
---
arch/x86/kvm/vmx.c | 18 ++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index
Enable VT-d Posted-Interrtups and add a command line
parameter for it.
Signed-off-by: Feng Wu feng...@intel.com
---
drivers/iommu/irq_remapping.c |9 -
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index
We don't need to migrate the irqs for VT-d Posted-Interrtups here.
When 'pst' is set in IRTE, the associated irq will be posted to
guests instead of interrupt remapping. The destination of the
interrupt is set in Posted-Interrupts Descriptor, and the migration
happens during VCPU scheduling.
Currently, we use a global vector as the Posted-Interrupts
Notification Event for all the VCPUs in the system. We need
to introduce another global vector for VT-d Posted-Interrtups,
which will be used to wakeup the sleep VCPU when an external
interrupt from a direct-assigned device happens for
Currently, we don't support urgent interrupt, all interrupts
are recognized as non-urgent interrupt, so we cannot send
posted-interrupt when 'SN' is set.
Signed-off-by: Feng Wu feng...@intel.com
---
arch/x86/kvm/vmx.c | 11 +--
1 files changed, 9 insertions(+), 2 deletions(-)
diff
When VCPU is blocked and an external interrupts from assigned
devices is delivered to it, VT-d Posted-Interrupts mechanism
will deliver a interrrupt to the associated physical CPU with
Wake-up Vector. In its handler, we find the destination VCPU
and wake up it.
Signed-off-by: Feng Wu
VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
intervention when guest is running in non-root mode.
This patch is used together with the patches in
When guest changes its interrupt configuration (such as, vector, etc.)
for direct-assigned devices, we need to update the associated IRTE
with the new guest vector, so external interrupts from the assigned
devices can be injected to guests without VM-Exit.
The current method of handling guest
This patch changes the NDST filed of Posted-Interrupts
Descriptor after VCPU is scheduled to another physical
CPU.
Signed-off-by: Feng Wu feng...@intel.com
---
arch/x86/kvm/vmx.c | 25 +
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c
VT-d Posted-Interrupts(PI) is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
involvement when guest is running in non-root mode.
If VT-d PI is supported by KVM, we need to
This patch initialize the VT-d Posted-interrupt Descritpor.
Signed-off-by: Feng Wu feng...@intel.com
---
arch/x86/include/asm/irq_remapping.h |1 +
arch/x86/kernel/apic/apic.c |1 +
arch/x86/kvm/vmx.c | 56 -
3 files changed,
VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
intervention when guest is running in non-root mode.
This patch adds feature detection logic for VT-d
This patch adds KVM_CAP_PI to detect VT-d Posted-Interrtups
feature for QEMU.
Signed-off-by: Feng Wu feng...@intel.com
---
arch/x86/kvm/x86.c |4
include/uapi/linux/kvm.h |1 +
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86.c
This patch adjusts the definition of 'struct irte', so that we can
add the VT-d Posted-Interrtups format in this structure later.
Signed-off-by: Feng Wu feng...@intel.com
---
drivers/iommu/intel_irq_remapping.c | 35 +++
include/linux/dmar.h|
* john_gong john_g...@yeah.net wrote:
hi Paolo,
i find a typo of the comment.
From 09d5df31f0930e8e3eb10ad60a3debc53d6ce992 Mon Sep 17 00:00:00 2001
From: john_gong john_g...@yeah.net
Date: Fri, 7 Nov 2014 07:32:17 +0800
Subject: [PATCH] modify a typo of the comment
Signed-off-by:
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