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Message-ID: <20141124141126.GA6795@potion.brq.redhat.com>
Date: Mon, 24 Nov 2014 15:11:26 +0100
From: Radim Krčmář <rkrcmar@...hat.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: KVM list <kvm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Alex Williamson <alex.williamson@...hat.com>
Subject: Re: [PATCH] kvm: x86: move assigned-dev.c and iommu.c to arch/x86/
2014-11-22 17:22+0100, Paolo Bonzini:
> On 21/11/2014 22:21, Radim Krčmář wrote:
> > - struct kvm_assigned_dev_kernel depends on struct kvm_irq_ack_notifier
>
> kvm_assign_device and kvm_deassign_device can also be moved to arch/x86,
> in a new assigned-dev.h header. The header could include struct
> kvm_assigned_dev_kernel too but, if you change the argument of
> kvm_assign_device and kvm_deassign_device to struct pci_dev, the struct
> can move directly to assigned-dev.c and remain hidden there.
Thanks!
> It's fine to do this as a follow up.
With assigned-dev.h, we could remove everything from x86/kvm_host.h too,
which would be better as a replacement to the original
---8<---
kvm: x86: move assigned-dev.c and iommu.c to arch/x86/
Now that ia64 is gone, we can hide deprecated device assignment in x86.
kvm_vm_ioctl_assigned_device() is newly called from kvm_arch_vm_ioctl().
Definitions and declarations have been consolidated into assigned-dev.h.
Remaining kvm_iommu_(un)map_pages() would require new code to be moved.
Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
---
arch/x86/kvm/Makefile | 2 +-
{virt => arch/x86}/kvm/assigned-dev.c | 1 +
arch/x86/kvm/assigned-dev.h | 59 +++++++++++++++++++++++++++++++++++
{virt => arch/x86}/kvm/iommu.c | 1 +
arch/x86/kvm/x86.c | 3 +-
include/linux/kvm_host.h | 55 --------------------------------
virt/kvm/kvm_main.c | 2 --
7 files changed, 64 insertions(+), 59 deletions(-)
rename {virt => arch/x86}/kvm/assigned-dev.c (99%)
create mode 100644 arch/x86/kvm/assigned-dev.h
rename {virt => arch/x86}/kvm/iommu.c (99%)
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index ee1cd92..08f790d 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -9,11 +9,11 @@ KVM := ../../../virt/kvm
kvm-y += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o \
$(KVM)/eventfd.o $(KVM)/irqchip.o $(KVM)/vfio.o
-kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT) += $(KVM)/assigned-dev.o $(KVM)/iommu.o
kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o
kvm-y += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
i8254.o ioapic.o irq_comm.o cpuid.o pmu.o
+kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT) += assigned-dev.o iommu.o
kvm-intel-y += vmx.o
kvm-amd-y += svm.o
diff --git a/virt/kvm/assigned-dev.c b/arch/x86/kvm/assigned-dev.c
similarity index 99%
rename from virt/kvm/assigned-dev.c
rename to arch/x86/kvm/assigned-dev.c
index e05000e..0cfd54f5f 100644
--- a/virt/kvm/assigned-dev.c
+++ b/arch/x86/kvm/assigned-dev.c
@@ -20,6 +20,7 @@
#include <linux/namei.h>
#include <linux/fs.h>
#include "irq.h"
+#include "assigned-dev.h"
static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
int assigned_dev_id)
diff --git a/arch/x86/kvm/assigned-dev.h b/arch/x86/kvm/assigned-dev.h
new file mode 100644
index 0000000..4caabc5
--- /dev/null
+++ b/arch/x86/kvm/assigned-dev.h
@@ -0,0 +1,59 @@
+#ifndef ARCH_X86_KVM_ASSIGNED_DEV_H
+#define ARCH_X86_KVM_ASSIGNED_DEV_H
+
+#include <linux/kvm_host.h>
+
+#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
+struct kvm_assigned_dev_kernel {
+ struct kvm_irq_ack_notifier ack_notifier;
+ struct list_head list;
+ int assigned_dev_id;
+ int host_segnr;
+ int host_busnr;
+ int host_devfn;
+ unsigned int entries_nr;
+ int host_irq;
+ bool host_irq_disabled;
+ bool pci_2_3;
+ struct msix_entry *host_msix_entries;
+ int guest_irq;
+ struct msix_entry *guest_msix_entries;
+ unsigned long irq_requested_type;
+ int irq_source_id;
+ int flags;
+ struct pci_dev *dev;
+ struct kvm *kvm;
+ spinlock_t intx_lock;
+ spinlock_t intx_mask_lock;
+ char irq_name[32];
+ struct pci_saved_state *pci_saved_state;
+};
+
+int kvm_assign_device(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev);
+int kvm_deassign_device(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev);
+
+int kvm_iommu_map_guest(struct kvm *kvm);
+int kvm_iommu_unmap_guest(struct kvm *kvm);
+
+long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
+ unsigned long arg);
+
+void kvm_free_all_assigned_devices(struct kvm *kvm);
+#else
+static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
+{
+ return 0;
+}
+
+static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
+ unsigned long arg)
+{
+ return -ENOTTY;
+}
+
+static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
+#endif /* CONFIG_KVM_DEVICE_ASSIGNMENT */
+
+#endif /* ARCH_X86_KVM_ASSIGNED_DEV_H */
diff --git a/virt/kvm/iommu.c b/arch/x86/kvm/iommu.c
similarity index 99%
rename from virt/kvm/iommu.c
rename to arch/x86/kvm/iommu.c
index c1e6ae9..91b0f48 100644
--- a/virt/kvm/iommu.c
+++ b/arch/x86/kvm/iommu.c
@@ -31,6 +31,7 @@
#include <linux/dmar.h>
#include <linux/iommu.h>
#include <linux/intel-iommu.h>
+#include "assigned-dev.h"
static bool allow_unsafe_assigned_interrupts;
module_param_named(allow_unsafe_assigned_interrupts,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5337039..c42bca4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -27,6 +27,7 @@
#include "kvm_cache_regs.h"
#include "x86.h"
#include "cpuid.h"
+#include "assigned-dev.h"
#include <linux/clocksource.h>
#include <linux/interrupt.h>
@@ -4007,7 +4008,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
}
default:
- ;
+ r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg);
}
out:
return r;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index d2d4270..6dcd820 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -718,31 +718,6 @@ struct kvm_irq_ack_notifier {
void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
};
-struct kvm_assigned_dev_kernel {
- struct kvm_irq_ack_notifier ack_notifier;
- struct list_head list;
- int assigned_dev_id;
- int host_segnr;
- int host_busnr;
- int host_devfn;
- unsigned int entries_nr;
- int host_irq;
- bool host_irq_disabled;
- bool pci_2_3;
- struct msix_entry *host_msix_entries;
- int guest_irq;
- struct msix_entry *guest_msix_entries;
- unsigned long irq_requested_type;
- int irq_source_id;
- int flags;
- struct pci_dev *dev;
- struct kvm *kvm;
- spinlock_t intx_lock;
- spinlock_t intx_mask_lock;
- char irq_name[32];
- struct pci_saved_state *pci_saved_state;
-};
-
int kvm_irq_map_gsi(struct kvm *kvm,
struct kvm_kernel_irq_routing_entry *entries, int gsi);
int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
@@ -764,12 +739,6 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
-int kvm_iommu_map_guest(struct kvm *kvm);
-int kvm_iommu_unmap_guest(struct kvm *kvm);
-int kvm_assign_device(struct kvm *kvm,
- struct kvm_assigned_dev_kernel *assigned_dev);
-int kvm_deassign_device(struct kvm *kvm,
- struct kvm_assigned_dev_kernel *assigned_dev);
#else
static inline int kvm_iommu_map_pages(struct kvm *kvm,
struct kvm_memory_slot *slot)
@@ -781,11 +750,6 @@ static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
struct kvm_memory_slot *slot)
{
}
-
-static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
-{
- return 0;
-}
#endif
static inline void kvm_guest_enter(void)
@@ -1005,25 +969,6 @@ static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
#endif
-#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
-
-long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
- unsigned long arg);
-
-void kvm_free_all_assigned_devices(struct kvm *kvm);
-
-#else
-
-static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
- unsigned long arg)
-{
- return -ENOTTY;
-}
-
-static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
-
-#endif
-
static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
{
set_bit(req, &vcpu->requests);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 3be4342..5b45330 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2582,8 +2582,6 @@ static long kvm_vm_ioctl(struct file *filp,
break;
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
- if (r == -ENOTTY)
- r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg);
}
out:
return r;
--
2.1.0
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