[PATCH v4 1/4] KVM: Recover IRTE to remapped mode if the interrupt is not single-destination

When the interrupt is not single destination any more, we need to change back IRTE to remapped mode explicitly. Signed-off-by: Feng Wu --- v4: - Don't need to Set SN before changing back to remapped mode arch/x86/kvm/vmx.c | 15 ++- 1 file changed, 14 insertions(+), 1 del

[PATCH v4 2/4] KVM: x86: Use vector-hashing to deliver lowest-priority interrupts

Use vector-hashing to deliver lowest-priority interrupts, As an example, modern Intel CPUs in server platform use this method to handle lowest-priority interrupts. Signed-off-by: Feng Wu --- v4: - Stylistic changes v3: - Fix a bug for sparse topologies, in that case, vcpu_id is not equal to the

[PATCH v4 4/4] KVM/VMX: Add host irq information in trace event when updating IRTE for posted interrupts

Add host irq information in trace event, so we can better understand which irq is in posted mode. Signed-off-by: Feng Wu Reviewed-by: Radim Krcmar --- arch/x86/kvm/trace.h | 12 arch/x86/kvm/vmx.c | 2 +- 2 files changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/x86

[PATCH v4 0/4] VT-d posted-interrupts follow ups

/4]: Add some enhancement to the trace message for vt-d PI. Detailed changelog is in each patch. Feng Wu (4): KVM: Recover IRTE to remapped mode if the interrupt is not single-destination KVM: x86: Use vector-hashing to deliver lowest-priority interrupts KVM: x86: Add lowest-priority

[PATCH v4 3/4] KVM: x86: Add lowest-priority support for vt-d posted-interrupts

Use vector-hashing to deliver lowest-priority interrupts for VT-d posted-interrupts. This patch extends kvm_intr_is_single_vcpu() to support lowest-priority handling. Signed-off-by: Feng Wu --- v4: - Recover the function name to 'kvm_intr_is_single_vcpu' - Stylistic changes v3

[PATCH v2 1/2] KVM: x86: Use vector-hashing to deliver lowest-priority interrupts

Use vector-hashing to deliver lowest-priority interrupts, As an example, modern Intel CPUs in server platform use this method to handle lowest-priority interrupts. Signed-off-by: Feng Wu --- arch/x86/kvm/irq_comm.c | 27 ++- arch/x86/kvm/lapic.c| 57

[PATCH v2 2/2] KVM: x86: Add lowest-priority support for vt-d posted-interrupts

Use vector-hashing to deliver lowest-priority interrupts for VT-d posted-interrupts. Signed-off-by: Feng Wu --- arch/x86/kvm/lapic.c | 67 arch/x86/kvm/lapic.h | 2 ++ arch/x86/kvm/vmx.c | 12 -- 3 files changed, 79 insertions

[PATCH v2 0/2] Add vector-hashing support for lowest-priority interrupts delivery

module parameter to control the vector-hashing mechanism Feng Wu (2): KVM: x86: Use vector-hashing to deliver lowest-priority interrupts KVM: x86: Add lowest-priority support for vt-d posted-interrupts arch/x86/kvm/irq_comm.c | 27 +-- arch/x86/kvm/lapic.c| 124

[PATCH] KVM: x86: Add lowest-priority support for vt-d posted-interrupts

Use vector-hashing to handle lowest-priority interrupts for posted-interrupts. As an example, modern Intel CPUs use this method to handle lowest-priority interrupts. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/irq_comm.c | 52

[PATCH] iommu/vt-d: Use cmpxchg16b to update posted format IRTE atomically

If IRTE is in posted format, the 'pda' field goes across the 64-bit boundary, we need use cmpxchg16b to atomically update it. We only expose posted-interrupt when X86_FEATURE_CX16 is supported and use to update it atomically. Signed-off-by: Feng Wu --- drivers/iommu/intel_irq_remapp

[tip:irq/core] genirq: Make irq_set_vcpu_affinity available for CONFIG_SMP=n

Commit-ID: fcf1ae2f7a044cda9956ec7afb487296afff058e Gitweb: http://git.kernel.org/tip/fcf1ae2f7a044cda9956ec7afb487296afff058e Author: Feng Wu AuthorDate: Sat, 3 Oct 2015 16:20:38 +0800 Committer: Thomas Gleixner CommitDate: Fri, 9 Oct 2015 22:47:27 +0200 genirq: Make

[PATCH] genirq: Move irq_set_vcpu_affinity out of "#ifdef CONFIG_SMP"

irq_set_vcpu_affinity() is needed when CONFIG_SMP=n, so move the definition out of "#ifdef CONFIG_SMP" Suggested-by: Paolo Bonzini Signed-off-by: Feng Wu --- kernel/irq/manage.c | 62 ++--- 1 file changed, 31 insertions(+), 31 deletion

[PATCH v2] Add virt directory to the top Makefile

We need to build files in virt/lib/, so add virt directory to the top Makefile. Signed-off-by: Feng Wu --- v2: - Remove the explicit 'virt' entry in the KBUILD_ALLDIRS assignment - Remove './' in virt/Makefile Makefile | 10 ++ arch/x86/kvm/Makefile |

[PATCH] Add virt directory to the top Makefile

We need to build files in virt/lib/, which are now used by KVM and VFIO, so add virt directory to the top Makefile. Signed-off-by: Feng Wu --- Makefile | 8 +--- arch/x86/kvm/Makefile | 3 --- virt/Makefile | 1 + 3 files changed, 6 insertions(+), 6 deletions(-) create

[PATCH v9 02/18] KVM: x86: select IRQ_BYPASS_MANAGER

Select IRQ_BYPASS_MANAGER for x86 when CONFIG_KVM is set Signed-off-by: Feng Wu --- arch/x86/kvm/Kconfig | 2 ++ arch/x86/kvm/Makefile | 3 +++ 2 files changed, 5 insertions(+) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index d8a1d56..c951d44 100644 --- a/arch/x86/kvm/Kconfig

[PATCH v9 04/18] KVM: create kvm_irqfd.h

From: Eric Auger Move _irqfd_resampler and _irqfd struct declarations in a new public header: kvm_irqfd.h. They are respectively renamed into kvm_kernel_irqfd_resampler and kvm_kernel_irqfd. Those datatypes will be used by architecture specific code, in the context of IRQ bypass manager integrati

[PATCH v9 05/18] KVM: introduce kvm_arch functions for IRQ bypass

Signed-off-by: Feng Wu --- v4 -> v5: - remove static inline stub functions v2 -> v3 (Feng Wu): - use 'kvm_arch_irq_bypass_start' instead of 'kvm_arch_irq_bypass_resume' - Remove 'kvm_arch_irq_bypass_update', which is not needed to be a irqbypass

[PATCH v9 07/18] KVM: Extend struct pi_desc for VT-d Posted-Interrupts

Extend struct pi_desc for VT-d Posted-Interrupts. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 20 ++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 83b7b5c..271dd70 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86

[PATCH v9 09/18] KVM: Define a new interface kvm_intr_is_single_vcpu()

single-CPU, we can use PI to deliver the interrupts to it. Full functionality of lowest-priority support will be added later. Signed-off-by: Feng Wu --- v9: - Move kvm_intr_is_single_vcpu_fast() to lapic.c - Remove incorrect WARN_ON_ONCE() v8: - Some optimizations in kvm_intr_is_single_vcpu

[PATCH v9 14/18] KVM: Implement IRQ bypass consumer callbacks for x86

Implement the following callbacks for x86: - kvm_arch_irq_bypass_add_producer - kvm_arch_irq_bypass_del_producer - kvm_arch_irq_bypass_stop: dummy callback - kvm_arch_irq_bypass_resume: dummy callback and set CONFIG_HAVE_KVM_IRQ_BYPASS for x86. Signed-off-by: Feng Wu --- v8: - Move the weak

[PATCH v9 13/18] KVM: x86: Update IRTE for posted-interrupts

This patch adds the routine to update IRTE for posted-interrupts when guest changes the interrupt configuration. Signed-off-by: Feng Wu --- v9: - Check !kvm_arch_has_assigned_device(kvm) first then !irq_remapping_cap(IRQ_POSTING_CAP) v8: - Move 'kvm_arch_update_pi_irte' to vmx.c as

[PATCH v9 12/18] vfio: Register/unregister irq_bypass_producer

This patch adds the registration/unregistration of an irq_bypass_producer for MSI/MSIx on vfio pci devices. Signed-off-by: Feng Wu --- v8: - Merge "[PATCH v7 08/17] vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices" into this patch. v6: - Make the add_consumer and del_consumer

[PATCH v9 15/18] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'

This patch adds an arch specific hooks 'arch_update' in 'struct kvm_kernel_irqfd'. On Intel side, it is used to update the IRTE when VT-d posted-interrupts is used. Signed-off-by: Feng Wu --- v9: - Use 'if' instead of "? :" in kvm_arch_update_irqfd_routing

[PATCH v9 16/18] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted

This patch updates the Posted-Interrupts Descriptor when vCPU is preempted. sched out: - Set 'SN' to suppress furture non-urgent interrupts posted for the vCPU. sched in: - Clear 'SN' - Change NDST if vCPU is scheduled to a different CPU - Set 'NV' to POSTED_INTR_

[PATCH v9 17/18] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked

This patch updates the Posted-Interrupts Descriptor when vCPU is blocked. pre-block: - Add the vCPU to the blocked per-CPU list - Set 'NV' to POSTED_INTR_WAKEUP_VECTOR post-block: - Remove the vCPU from the per-CPU list Signed-off-by: Feng Wu --- v9: - Add descr

[PATCH v9 18/18] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

Enable VT-d Posted-Interrtups and add a command line parameter for it. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- Documentation/kernel-parameters.txt | 1 + drivers/iommu/irq_remapping.c | 12 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a

[PATCH v9 11/18] KVM: make kvm_set_msi_irq() public

Make kvm_set_msi_irq() public, we can use this function outside. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- v8: - Export kvm_set_msi_irq() so we can use it in vmx code arch/x86/include/asm/kvm_host.h | 4 arch/x86/kvm/irq_comm.c | 5 +++-- 2 files changed, 7 insertions

[PATCH v9 06/18] KVM: eventfd: add irq bypass consumer management

From: Eric Auger This patch adds the registration/unregistration of an irq_bypass_consumer on irqfd assignment/deassignment. Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- v4 -> v5: - due to removal of static inline stubs, add #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS around consu

[PATCH v9 01/18] virt: IRQ bypass manager

automatically enabled. Signed-off-by: Alex Williamson Reviewed-by: Eric Auger Tested-by: Eric Auger Tested-by: Feng Wu --- v4: All producer callbacks are optional, as with Intel PI, it's possible for the producer to be blissfully unaware of the bypass. MAINTAINERS | 7 ++ in

[PATCH v9 10/18] KVM: Make struct kvm_irq_routing_table accessible

Move struct kvm_irq_routing_table from irqchip.c to kvm_host.h, so we can use it outside of irqchip.c. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- include/linux/kvm_host.h | 14 ++ virt/kvm/irqchip.c | 10 -- 2 files changed, 14 insertions(+), 10 deletions

[PATCH v9 03/18] KVM: arm/arm64: select IRQ_BYPASS_MANAGER

From: Eric Auger Select IRQ_BYPASS_MANAGER when CONFIG_KVM is set Also add compilation of virt/lib. Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- v3 -> v4: - add compilation of virt/lib in arm/arm64 KVM v2 -> v3: - [Feng Wu] Correct a typo in 'arch/arm64/kvm/Kconfig'

[PATCH v9 08/18] KVM: Add some helper functions for Posted-Interrupts

This patch adds some helper functions to manipulate the Posted-Interrupts Descriptor. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 26 ++ 1 file changed, 26 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 271dd70

[PATCH v9 00/18] Add VT-d Posted-Interrupts support - including prerequisite series

on the new hierarchy irqdomain patches provided by Jiang Liu *** BLURB HERE *** Alex Williamson (1): virt: IRQ bypass manager Eric Auger (4): KVM: arm/arm64: select IRQ_BYPASS_MANAGER KVM: create kvm_irqfd.h KVM: introduce kvm_arch functions for IRQ bypass KVM: eventfd: add irq

[PATCH v8 01/13] KVM: Extend struct pi_desc for VT-d Posted-Interrupts

Extend struct pi_desc for VT-d Posted-Interrupts. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 20 ++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 83b7b5c..271dd70 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86

[PATCH v8 03/13] KVM: Define a new interface kvm_intr_is_single_vcpu()

single-CPU, we can use PI to deliver the interrupts to it. Full functionality of lowest-priority support will be added later. Signed-off-by: Feng Wu --- v8: - Some optimizations in kvm_intr_is_single_vcpu(). - Expose kvm_intr_is_single_vcpu() so we can use it in vmx code. - Add

[PATCH v8 05/13] KVM: make kvm_set_msi_irq() public

Make kvm_set_msi_irq() public, we can use this function outside. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- v8: - Export kvm_set_msi_irq() so we can use it in vmx code arch/x86/include/asm/kvm_host.h | 4 arch/x86/kvm/irq_comm.c | 5 +++-- 2 files changed, 7 insertions

[PATCH v8 02/13] KVM: Add some helper functions for Posted-Interrupts

This patch adds some helper functions to manipulate the Posted-Interrupts Descriptor. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 26 ++ 1 file changed, 26 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 271dd70

[PATCH v8 08/13] KVM: Implement IRQ bypass consumer callbacks for x86

Implement the following callbacks for x86: - kvm_arch_irq_bypass_add_producer - kvm_arch_irq_bypass_del_producer - kvm_arch_irq_bypass_stop: dummy callback - kvm_arch_irq_bypass_resume: dummy callback and set CONFIG_HAVE_KVM_IRQ_BYPASS for x86. Signed-off-by: Feng Wu --- v8: - Move the weak

[PATCH v8 07/13] KVM: x86: Update IRTE for posted-interrupts

This patch adds the routine to update IRTE for posted-interrupts when guest changes the interrupt configuration. Signed-off-by: Feng Wu --- v8: - Move 'kvm_arch_update_pi_irte' to vmx.c as a callback - Only update the PI irte when VM has assigned devices - Add a trace point for V

[PATCH v8 11/13] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked

This patch updates the Posted-Interrupts Descriptor when vCPU is blocked. pre-block: - Add the vCPU to the blocked per-CPU list - Set 'NV' to POSTED_INTR_WAKEUP_VECTOR post-block: - Remove the vCPU from the per-CPU list Signed-off-by: Feng Wu --- v8: - Rename 'pi_pre_block

[PATCH v8 09/13] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'

This patch adds an arch specific hooks 'arch_update' in 'struct kvm_kernel_irqfd'. On Intel side, it is used to update the IRTE when VT-d posted-interrupts is used. Signed-off-by: Feng Wu --- v8: - Remove callback .arch_update() - Remove kvm_arch_irqfd_init() - Call kvm_arch_

[PATCH v8 13/13] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

Enable VT-d Posted-Interrtups and add a command line parameter for it. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- Documentation/kernel-parameters.txt | 1 + drivers/iommu/irq_remapping.c | 12 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a

[PATCH v8 10/13] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted

This patch updates the Posted-Interrupts Descriptor when vCPU is preempted. sched out: - Set 'SN' to suppress furture non-urgent interrupts posted for the vCPU. sched in: - Clear 'SN' - Change NDST if vCPU is scheduled to a different CPU - Set 'NV' to POSTED_INTR_

[PATCH v8 12/13] KVM: Warn if 'SN' is set during posting interrupts by software

is set. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 16 1 file changed, 16 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 9888c43..58fbbc6 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4498,6 +4498,22 @

[PATCH v8 06/13] vfio: Register/unregister irq_bypass_producer

This patch adds the registration/unregistration of an irq_bypass_producer for MSI/MSIx on vfio pci devices. Signed-off-by: Feng Wu --- v8: - Merge "[PATCH v7 08/17] vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices" into this patch. v6: - Make the add_consumer and del_consumer

[PATCH v8 04/13] KVM: Make struct kvm_irq_routing_table accessible

Move struct kvm_irq_routing_table from irqchip.c to kvm_host.h, so we can use it outside of irqchip.c. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- include/linux/kvm_host.h | 14 ++ virt/kvm/irqchip.c | 10 -- 2 files changed, 14 insertions(+), 10 deletions

[PATCH v8 00/13] Add VT-d Posted-Interrupts support

ol" * Rebase this patchset on git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git, then revise some irq logic based on the new hierarchy irqdomain patches provided by Jiang Liu Feng Wu (13): KVM: Extend struct pi_desc for VT-d Posted-Interrupts KVM: Add some helper functions for Posted-I

[PATCH v7 03/17] KVM: Define a new interface kvm_intr_is_single_vcpu()

single-CPU, we can use PI to deliver the interrupts to it. Full functionality of lowest-priority support will be added later. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/irq_comm.c | 24 2 files changed, 27 insertions

[PATCH v7 01/17] KVM: Extend struct pi_desc for VT-d Posted-Interrupts

Extend struct pi_desc for VT-d Posted-Interrupts. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 20 ++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 83b7b5c..271dd70 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86

[PATCH v7 06/17] KVM: Make struct kvm_irq_routing_table accessible

Move struct kvm_irq_routing_table from irqchip.c to kvm_host.h, so we can use it outside of irqchip.c. Signed-off-by: Feng Wu --- include/linux/kvm_host.h | 14 ++ virt/kvm/irqchip.c | 10 -- 2 files changed, 14 insertions(+), 10 deletions(-) diff --git a/include

[PATCH v7 05/17] KVM: Add interfaces to control PI outside vmx

This patch adds pi_clear_sn and pi_set_sn to struct kvm_x86_ops, so we can set/clear SN outside vmx. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/vmx.c | 13 + 2 files changed, 16 insertions(+) diff --git a/arch/x86/include/asm

[PATCH v7 09/17] vfio: Register/unregister irq_bypass_producer

ARN_ON() when irq_bypass_register_producer fails - Remove optional dummy callbacks for irq producer Signed-off-by: Feng Wu --- drivers/vfio/pci/vfio_pci_intrs.c | 9 + drivers/vfio/pci/vfio_pci_private.h | 2 ++ 2 files changed, 11 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/dri

[PATCH v7 07/17] KVM: make kvm_set_msi_irq() public

Make kvm_set_msi_irq() public, we can use this function outside. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 4 arch/x86/kvm/irq_comm.c | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm

[PATCH v7 10/17] KVM: x86: Update IRTE for posted-interrupts

This patch adds the routine to update IRTE for posted-interrupts when guest changes the interrupt configuration. Signed-off-by: Feng Wu --- arch/x86/kvm/x86.c | 73 ++ 1 file changed, 73 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch

[PATCH v7 12/17] KVM: Implement IRQ bypass consumer callbacks for x86

Implement the following callbacks for x86: - kvm_arch_irq_bypass_add_producer - kvm_arch_irq_bypass_del_producer - kvm_arch_irq_bypass_stop: dummy callback - kvm_arch_irq_bypass_resume: dummy callback and set CONFIG_HAVE_KVM_IRQ_BYPASS for x86. Signed-off-by: Feng Wu --- arch/x86/include/asm

[PATCH v7 14/17] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted

This patch updates the Posted-Interrupts Descriptor when vCPU is preempted. sched out: - Set 'SN' to suppress furture non-urgent interrupts posted for the vCPU. sched in: - Clear 'SN' - Change NDST if vCPU is scheduled to a different CPU - Set 'NV' to POSTED_INTR_

[PATCH v7 15/17] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked

This patch updates the Posted-Interrupts Descriptor when vCPU is blocked. pre-block: - Add the vCPU to the blocked per-CPU list - Set 'NV' to POSTED_INTR_WAKEUP_VECTOR post-block: - Remove the vCPU from the per-CPU list Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h |

[PATCH v7 16/17] KVM: Warn if 'SN' is set during posting interrupts by software

is set. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 16 1 file changed, 16 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 64e35ea..eb640a1 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4494,6 +4494,22 @

[PATCH v7 17/17] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

Enable VT-d Posted-Interrtups and add a command line parameter for it. Signed-off-by: Feng Wu --- Documentation/kernel-parameters.txt | 1 + drivers/iommu/irq_remapping.c | 12 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/Documentation/kernel-parameters.txt

[PATCH v7 11/17] KVM: Define two weak arch callbacks for irq bypass manager

Define two weak arch callbacks so that archs that don't need them don't need define them. Signed-off-by: Feng Wu --- virt/kvm/eventfd.c | 10 ++ 1 file changed, 10 insertions(+) diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index d7a230f..f3050b9 100644 --- a/virt/kvm

[PATCH v7 13/17] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'

This patch adds an arch specific hooks 'arch_update' in 'struct kvm_kernel_irqfd'. On Intel side, it is used to update the IRTE when VT-d posted-interrupts is used. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/x86.c | 5

[PATCH v7 08/17] vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices

Enable irq bypass manager for vfio PCI devices. Signed-off-by: Feng Wu --- drivers/vfio/pci/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 579d83b..02912f1 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig

[PATCH v7 00/17] Add VT-d Posted-Interrupts support

rg/pub/scm/linux/kernel/git/tip/tip.git, then revise some irq logic based on the new hierarchy irqdomain patches provided by Jiang Liu Feng Wu (17): KVM: Extend struct pi_desc for VT-d Posted-Interrupts KVM: Add some helper functions for Posted-Interrupts KVM: Define a new interface kvm_

[PATCH v7 02/17] KVM: Add some helper functions for Posted-Interrupts

This patch adds some helper functions to manipulate the Posted-Interrupts Descriptor. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 26 ++ 1 file changed, 26 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 271dd70..316f9bf 100644 --- a/arch

[PATCH v7 04/17] KVM: Get Posted-Interrupts descriptor address from 'struct kvm_vcpu'

Define an interface to get PI descriptor address from the vCPU structure. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/vmx.c | 11 +++ 2 files changed, 13 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm

[PATCH v6 00/16] Add VT-d Posted-Interrupts support

, then revise some irq logic based on the new hierarchy irqdomain patches provided by Jiang Liu Feng Wu (16): KVM: Extend struct pi_desc for VT-d Posted-Interrupts KVM: Add some helper functions for Posted-Interrupts KVM: Define a new interface kvm_intr_is_single_vcpu() KVM: Get Po

[PATCH v6 05/16] KVM: Add interfaces to control PI outside vmx

This patch adds pi_clear_sn and pi_set_sn to struct kvm_x86_ops, so we can set/clear SN outside vmx. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/vmx.c | 13 + 2 files changed, 16 insertions(+) diff --git a/arch/x86/include/asm

[PATCH v6 04/16] KVM: Get Posted-Interrupts descriptor address from 'struct kvm_vcpu'

Define an interface to get PI descriptor address from the vCPU structure. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/vmx.c | 11 +++ 2 files changed, 13 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm

[PATCH v6 01/16] KVM: Extend struct pi_desc for VT-d Posted-Interrupts

Extend struct pi_desc for VT-d Posted-Interrupts. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 20 ++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 83b7b5c..271dd70 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86

[PATCH v6 06/16] KVM: Make struct kvm_irq_routing_table accessible

Move struct kvm_irq_routing_table from irqchip.c to kvm_host.h, so we can use it outside of irqchip.c. Signed-off-by: Feng Wu --- include/linux/kvm_host.h | 14 ++ virt/kvm/irqchip.c | 10 -- 2 files changed, 14 insertions(+), 10 deletions(-) diff --git a/include

[PATCH v6 08/16] vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices

Enable irq bypass manager for vfio PCI devices. Signed-off-by: Feng Wu --- drivers/vfio/pci/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 579d83b..02912f1 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig

[PATCH v6 12/16] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'

This patch adds an arch specific hooks 'arch_update' in 'struct kvm_kernel_irqfd'. On Intel side, it is used to update the IRTE when VT-d posted-interrupts is used. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/x86.c | 5

[PATCH v6 10/16] KVM: x86: Update IRTE for posted-interrupts

This patch adds the routine to update IRTE for posted-interrupts when guest changes the interrupt configuration. Signed-off-by: Feng Wu --- arch/x86/kvm/x86.c | 73 ++ 1 file changed, 73 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch

[PATCH v6 14/16] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked

This patch updates the Posted-Interrupts Descriptor when vCPU is blocked. pre-block: - Add the vCPU to the blocked per-CPU list - Set 'NV' to POSTED_INTR_WAKEUP_VECTOR post-block: - Remove the vCPU from the per-CPU list Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h |

[PATCH v6 11/16] KVM: Implement IRQ bypass consumer callbacks for x86

Implement the following callbacks for x86: - kvm_arch_irq_bypass_add_producer - kvm_arch_irq_bypass_del_producer - kvm_arch_irq_bypass_stop: dummy callback - kvm_arch_irq_bypass_resume: dummy callback and set CONFIG_HAVE_KVM_IRQ_BYPASS for x86. Signed-off-by: Feng Wu --- arch/x86/include/asm

[PATCH v6 13/16] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted

This patch updates the Posted-Interrupts Descriptor when vCPU is preempted. sched out: - Set 'SN' to suppress furture non-urgent interrupts posted for the vCPU. sched in: - Clear 'SN' - Change NDST if vCPU is scheduled to a different CPU - Set 'NV' to POSTED_INTR_

[PATCH v6 16/16] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

Enable VT-d Posted-Interrtups and add a command line parameter for it. Signed-off-by: Feng Wu --- Documentation/kernel-parameters.txt | 1 + drivers/iommu/irq_remapping.c | 12 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/Documentation/kernel-parameters.txt

[PATCH v6 03/16] KVM: Define a new interface kvm_intr_is_single_vcpu()

single-CPU, we can use PI to deliver the interrupts to it. Full functionality of lowest-priority support will be added later. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/irq_comm.c | 24 2 files changed, 27 insertions

[PATCH v6 15/16] KVM: Warn if 'SN' is set during posting interrupts by software

is set. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 16 1 file changed, 16 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 6b50eba..b4f5600 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4477,6 +4477,22 @

[PATCH v6 07/16] KVM: make kvm_set_msi_irq() public

Make kvm_set_msi_irq() public, we can use this function outside. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 4 arch/x86/kvm/irq_comm.c | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm

[PATCH v6 02/16] KVM: Add some helper functions for Posted-Interrupts

This patch adds some helper functions to manipulate the Posted-Interrupts Descriptor. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 26 ++ 1 file changed, 26 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 271dd70..316f9bf 100644 --- a/arch

[PATCH v6 09/16] vfio: Register/unregister irq_bypass_producer

ARN_ON() when irq_bypass_register_producer fails - Remove optional dummy callbacks for irq producer Signed-off-by: Feng Wu --- drivers/vfio/pci/vfio_pci_intrs.c | 9 + drivers/vfio/pci/vfio_pci_private.h | 2 ++ 2 files changed, 11 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/dri

[v3 0/5] KVM: irqfd consumer based on IRQ bypass manager

irq bypass consumer management Feng Wu (1): KVM: x86: select IRQ_BYPASS_MANAGER arch/arm/kvm/Kconfig | 1 + arch/arm64/kvm/Kconfig| 1 + arch/x86/kvm/Kconfig | 2 + arch/x86/kvm/Makefile | 3 ++ include/linux/kvm_host.h | 33 +++ include/lin

[v3 2/5] KVM: arm/arm64: select IRQ_BYPASS_MANAGER

From: Eric Auger Select IRQ_BYPASS_MANAGER when CONFIG_KVM is set v2 -> v3: - Correct a typo in 'arch/arm64/kvm/Kconfig' v1 -> v2: - also set IRQ_BYPASS_MANAGER for arm64 Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- arch/arm/kvm/Kconfig | 1 + arch/arm64/kvm/

[v3 4/5] KVM: introduce kvm_arch functions for IRQ bypass

M_HAVE_IRQ_BYPASS instead CONFIG_IRQ_BYPASS_MANAGER - rename all functions according to Paolo's proposal - add kvm_arch_irq_bypass_update according to Feng's need Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- include/linux/kvm_host.h | 33 + virt

[v3 1/5] KVM: x86: select IRQ_BYPASS_MANAGER

Select IRQ_BYPASS_MANAGER for x86 when CONFIG_KVM is set Signed-off-by: Feng Wu --- arch/x86/kvm/Kconfig | 2 ++ arch/x86/kvm/Makefile | 3 +++ 2 files changed, 5 insertions(+) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index d8a1d56..c951d44 100644 --- a/arch/x86/kvm/Kconfig

[v3 5/5] KVM: eventfd: add irq bypass consumer management

rnel_irqfd', it is needed by posted interrupt. - Remove 'irq_bypass_unregister_consumer' in kvm_irqfd_deassign() v1 -> v2: - populate of kvm and gsi removed - unregister the consumer on irqfd_shutdown Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- include/linux/kvm

[v3 3/5] KVM: create kvm_irqfd.h

From: Eric Auger Move _irqfd_resampler and _irqfd struct declarations in a new public header: kvm_irqfd.h. They are respectively renamed into kvm_kernel_irqfd_resampler and kvm_kernel_irqfd. Those datatypes will be used by architecture specific code, in the context of IRQ bypass manager integrati

[v5 06/19] KVM: Make struct kvm_irq_routing_table accessible

Move struct kvm_irq_routing_table from irqchip.c to kvm_host.h, so we can use it outside of irqchip.c. Signed-off-by: Feng Wu --- include/linux/kvm_host.h | 15 +++ virt/kvm/irqchip.c | 11 --- 2 files changed, 15 insertions(+), 11 deletions(-) diff --git a/include

[v5 02/19] KVM: Add some helper functions for Posted-Interrupts

This patch adds some helper functions to manipulate the Posted-Interrupts Descriptor. Signed-off-by: Feng Wu --- arch/x86/kvm/vmx.c | 26 ++ 1 file changed, 26 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 765539e..1e815b6 100644 --- a/arch

[v5 07/19] KVM: make kvm_set_msi_irq() public

Make kvm_set_msi_irq() public, we can use this function outside. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 4 arch/x86/kvm/irq_comm.c | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm

[v5 05/19] KVM: Add interfaces to control PI outside vmx

This patch adds pi_clear_sn and pi_set_sn to struct kvm_x86_ops, so we can set/clear SN outside vmx. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/vmx.c | 13 + 2 files changed, 16 insertions(+) diff --git a/arch/x86/include/asm

[v5 08/19] vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices

Enable irq bypass manager for vfio PCI devices. Signed-off-by: Feng Wu --- drivers/vfio/pci/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 579d83b..02912f1 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig

[v5 03/19] KVM: Define a new interface kvm_intr_is_single_vcpu()

single-CPU, we can use PI to deliver the interrupts to it. Full functionality of lowest-priority support will be added later. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/irq_comm.c | 24 2 files changed, 26 insertions(+) diff

[v5 04/19] KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu

Define an interface to get PI descriptor address from the vCPU structure. Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/vmx.c | 11 +++ 2 files changed, 13 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm

[v5 14/19] KVM: x86: Add arch specific routines for irqbypass manager

Add the following x86 specific routines for irqbypass manger: - kvm_arch_irq_bypass_add_producer - kvm_arch_irq_bypass_del_producer Signed-off-by: Feng Wu --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/x86.c | 40 include/linux

[v5 09/19] vfio: Register/unregister irq_bypass_producer

This patch adds the registration/unregistration of an irq_bypass_producer for MSI/MSIx on vfio pci devices. Signed-off-by: Feng Wu --- drivers/vfio/pci/vfio_pci_intrs.c | 19 +++ drivers/vfio/pci/vfio_pci_private.h | 2 ++ 2 files changed, 21 insertions(+) diff --git a

[v5 10/19] KVM, x86: Select IRQ_BYPASS_MANAGER for KVM_INTEL

Enable irq bypass manager for kvm-intel. Signed-off-by: Feng Wu --- arch/x86/kvm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 921a8f9..be125bc 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -61,6 +61,7 @@ config

[v5 11/19] KVM: create kvm_irqfd.h

From: Eric Auger Move _irqfd_resampler and _irqfd struct declarations in a new public header: kvm_irqfd.h. They are respectively renamed into kvm_kernel_irqfd_resampler and kvm_kernel_irqfd. Those datatypes will be used by architecture specific code, in the context of IRQ bypass manager integrati

[v5 12/19] KVM: eventfd: add irq bypass information in irqfd

From: Eric Auger This patch adds the following new members in 'struct kvm_kernel_irqfd' - struct irq_bypass_consumer consumer - struct irq_bypass_producer *producer Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- include/linux/kvm_irqfd.h | 3 +++ 1 file changed, 3

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