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memory: Introduce IOMMU Memory Region inject_faults API

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This new API allows to inject @count iommu_faults into
the IOMMU memory region.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
This commit is contained in:
Chen Qun 2018-09-13 14:13:04 +02:00
parent f026ae6d35
commit 42c9d0a3d0
1 changed files with 89 additions and 0 deletions
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89
memory-Introduce-IOMMU-Memory-Region-inject_faults-A.patch Normal file
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@ -0,0 +1,89 @@
From 497e055ed89e3cb5286dde2b05b7d7fd67e69331 Mon Sep 17 00:00:00 2001
From: Eric Auger <eric.auger@redhat.com>
Date: Thu, 13 Sep 2018 14:13:04 +0200
Subject: [PATCH] memory: Introduce IOMMU Memory Region inject_faults API
This new API allows to inject @count iommu_faults into
the IOMMU memory region.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
---
include/exec/memory.h | 25 +++++++++++++++++++++++++
memory.c | 10 ++++++++++
2 files changed, 35 insertions(+)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 716b07e115..ffd4282f14 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -56,6 +56,8 @@ struct MemoryRegionMmio {
CPUWriteMemoryFunc *write[3];
};
+struct iommu_fault;
+
typedef struct IOMMUTLBEntry IOMMUTLBEntry;
/* See address_space_translate: bit 0 is read, bit 1 is write. */
@@ -378,6 +380,19 @@ typedef struct IOMMUMemoryRegionClass {
* @iommu: the IOMMUMemoryRegion
*/
int (*num_indexes)(IOMMUMemoryRegion *iommu);
+
+ /*
+ * Inject @count faults into the IOMMU memory region
+ *
+ * Optional method: if this method is not provided, then
+ * memory_region_injection_faults() will return -ENOENT
+ *
+ * @iommu: the IOMMU memory region to inject the faults in
+ * @count: number of faults to inject
+ * @buf: fault buffer
+ */
+ int (*inject_faults)(IOMMUMemoryRegion *iommu, int count,
+ struct iommu_fault *buf);
} IOMMUMemoryRegionClass;
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
@@ -1182,6 +1197,16 @@ int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr,
*/
int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr);
+/**
+ * memory_region_inject_faults : inject @count faults stored in @buf
+ *
+ * @iommu_mr: the IOMMU memory region
+ * @count: number of faults to be injected
+ * @buf: buffer containing the faults
+ */
+int memory_region_inject_faults(IOMMUMemoryRegion *iommu_mr, int count,
+ struct iommu_fault *buf);
+
/**
* memory_region_name: get a memory region's name
*
diff --git a/memory.c b/memory.c
index 708b3dff3d..623f89baa4 100644
--- a/memory.c
+++ b/memory.c
@@ -2017,6 +2017,16 @@ int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr)
return imrc->num_indexes(iommu_mr);
}
+int memory_region_inject_faults(IOMMUMemoryRegion *iommu_mr, int count,
+ struct iommu_fault *buf)
+{
+ IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
+ if (!imrc->inject_faults) {
+ return -ENOENT;
+ }
+ return imrc->inject_faults(iommu_mr, count, buf);
+}
+
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
{
uint8_t mask = 1 << client;
--
2.27.0