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[Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag
From: |
Peter Xu |
Subject: |
[Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag |
Date: |
Mon, 5 Sep 2016 15:21:20 +0800 |
When there are active IOMMU notify registers, the iommu_notify_flag will
cache existing notify flag. When notifiers are triggered, flag will be
checked against the cached result.
Signed-off-by: Peter Xu <address@hidden>
---
hw/ppc/spapr_iommu.c | 2 +-
hw/s390x/s390-pci-inst.c | 2 +-
include/exec/memory.h | 6 +++++-
memory.c | 6 +++++-
4 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index 09660fc..14b1f00 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -411,7 +411,7 @@ static target_ulong put_tce_emu(sPAPRTCETable *tcet,
target_ulong ioba,
entry.translated_addr = tce & page_mask;
entry.addr_mask = ~page_mask;
entry.perm = spapr_tce_iommu_access_flags(tce);
- memory_region_notify_iommu(&tcet->iommu, entry);
+ memory_region_notify_iommu(&tcet->iommu, entry, IOMMU_RW);
return H_SUCCESS;
}
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index f069b11..29ef345 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -616,7 +616,7 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
goto out;
}
- memory_region_notify_iommu(mr, entry);
+ memory_region_notify_iommu(mr, entry, IOMMU_RW);
start += entry.addr_mask + 1;
}
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 6c16a86..c67b3da 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -57,6 +57,7 @@ typedef enum {
IOMMU_RO = 1,
IOMMU_WO = 2,
IOMMU_RW = 3,
+ IOMMU_ACCESS_INVALID = 4,
} IOMMUAccessFlags;
struct IOMMUTLBEntry {
@@ -202,6 +203,7 @@ struct MemoryRegion {
unsigned ioeventfd_nb;
MemoryRegionIoeventfd *ioeventfds;
NotifierList iommu_notify;
+ IOMMUAccessFlags iommu_notify_flag;
};
/**
@@ -611,9 +613,11 @@ uint64_t
memory_region_iommu_get_min_page_size(MemoryRegion *mr);
* @entry: the new entry in the IOMMU translation table. The entry
* replaces all old entries for the same virtual I/O address range.
* Deleted entries have address@hidden == 0.
+ * @flag: type of IOMMU notification (IOMMU_RW, IOMMU_NONE)
*/
void memory_region_notify_iommu(MemoryRegion *mr,
- IOMMUTLBEntry entry);
+ IOMMUTLBEntry entry,
+ IOMMUAccessFlags flag);
/**
* memory_region_register_iommu_notifier: register a notifier for changes to
diff --git a/memory.c b/memory.c
index 747a9ec..5b50d15 100644
--- a/memory.c
+++ b/memory.c
@@ -1418,6 +1418,7 @@ void memory_region_init_iommu(MemoryRegion *mr,
memory_region_init(mr, owner, name, size);
mr->iommu_ops = ops,
mr->terminates = true; /* then re-forwards */
+ mr->iommu_notify_flag = IOMMU_ACCESS_INVALID;
notifier_list_init(&mr->iommu_notify);
}
@@ -1520,6 +1521,7 @@ void memory_region_register_iommu_notifier(MemoryRegion
*mr, Notifier *n,
if (mr->iommu_ops->notify_started &&
QLIST_EMPTY(&mr->iommu_notify.notifiers)) {
mr->iommu_ops->notify_started(mr, flag);
+ mr->iommu_notify_flag = flag;
}
notifier_list_add(&mr->iommu_notify, n);
}
@@ -1560,13 +1562,15 @@ void
memory_region_unregister_iommu_notifier(MemoryRegion *mr, Notifier *n)
if (mr->iommu_ops->notify_stopped &&
QLIST_EMPTY(&mr->iommu_notify.notifiers)) {
mr->iommu_ops->notify_stopped(mr);
+ mr->iommu_notify_flag = IOMMU_ACCESS_INVALID;
}
}
void memory_region_notify_iommu(MemoryRegion *mr,
- IOMMUTLBEntry entry)
+ IOMMUTLBEntry entry, IOMMUAccessFlags flag)
{
assert(memory_region_is_iommu(mr));
+ assert(flag == mr->iommu_notify_flag);
notifier_list_notify(&mr->iommu_notify, &entry);
}
--
2.7.4
- [Qemu-devel] [PATCH 0/3] memory: add IOMMU notifier type, Peter Xu, 2016/09/05
- [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag,
Peter Xu <=
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Paolo Bonzini, 2016/09/05
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Peter Xu, 2016/09/05
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Paolo Bonzini, 2016/09/05
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Peter Xu, 2016/09/06
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Paolo Bonzini, 2016/09/06
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Peter Xu, 2016/09/06
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Paolo Bonzini, 2016/09/06
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Peter Xu, 2016/09/06
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, David Gibson, 2016/09/07
- Re: [Qemu-devel] [PATCH 2/3] memory: add iommu_notify_flag, Peter Xu, 2016/09/07