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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 05/13] iommu: don't domain_crash() inside iommu_map/unmap_page()
Turn iommu_map/unmap_page() into straightforward wrappers that check the
existence of the relevant iommu_op and call through to it. This makes them
usable by PV IOMMU code to be delivered in future patches.
Leave the decision on whether to invoke domain_crash() up to the caller.
This has the added benefit that the (module/line number) message that
domain_crash() spits out will be more indicative of where the problem lies.
NOTE: This patch includes one bit of clean-up in set_identity_p2m_entry()
replacing use of p2m->domain with the domain pointer passed into the
function.
Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Jun Nakajima <jun.nakajima@xxxxxxxxx>
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
v2:
- New in v2.
---
xen/arch/arm/p2m.c | 2 ++
xen/arch/x86/mm.c | 3 +++
xen/arch/x86/mm/p2m-ept.c | 3 +++
xen/arch/x86/mm/p2m-pt.c | 3 +++
xen/arch/x86/mm/p2m.c | 20 ++++++++++++++++++--
xen/common/grant_table.c | 8 ++++++++
xen/common/memory.c | 3 +++
xen/drivers/passthrough/iommu.c | 12 ------------
xen/drivers/passthrough/x86/iommu.c | 5 +++++
9 files changed, 45 insertions(+), 14 deletions(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 42c16da4dd..b99f4ff913 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -955,6 +955,8 @@ static int __p2m_set_entry(struct p2m_domain *p2m,
unsigned long frame = gfn_x(sgfn);
rc = iommu_iotlb_flush(p2m->domain, _bfn(frame), 1UL << page_order);
+ if ( unlikely(rc) && !is_hardware_domain(p2m->domain) )
+ domain_crash(p2m->domain);
}
else
rc = 0;
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 4e66c6742d..32f09bac0a 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -2738,6 +2738,9 @@ static int _get_page_type(struct page_info *page,
unsigned long type,
iommu_ret = iommu_map_page(d, _bfn(frame), mfn,
IOMMUF_readable |
IOMMUF_writable);
+
+ if ( unlikely(iommu_ret) && !is_hardware_domain(d) )
+ domain_crash(d);
}
}
diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index 4951234197..5fc1e1a838 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -898,6 +898,9 @@ out:
if ( !rc )
rc = ret;
}
+
+ if ( unlikely(rc) && !is_hardware_domain(d) )
+ domain_crash(d);
}
}
diff --git a/xen/arch/x86/mm/p2m-pt.c b/xen/arch/x86/mm/p2m-pt.c
index 467ac8cb76..4e04525195 100644
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -719,6 +719,9 @@ p2m_pt_set_entry(struct p2m_domain *p2m, gfn_t gfn_, mfn_t
mfn,
rc = ret;
}
}
+
+ if ( unlikely(rc) && !is_hardware_domain(p2m->domain) )
+ domain_crash(p2m->domain);
}
/*
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index ce12bcff42..5ff1d51a0e 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -724,6 +724,9 @@ p2m_remove_page(struct p2m_domain *p2m, unsigned long
gfn_l, unsigned long mfn,
if ( !rc )
rc = ret;
}
+
+ if ( unlikely(rc) && !is_hardware_domain(p2m->domain) )
+ domain_crash(p2m->domain);
}
return rc;
@@ -790,6 +793,9 @@ guest_physmap_add_entry(struct domain *d, gfn_t gfn, mfn_t
mfn,
if ( iommu_unmap_page(d, bfn_add(bfn, i)) )
continue;
+ if ( !is_hardware_domain(d) )
+ domain_crash(d);
+
return rc;
}
}
@@ -1158,7 +1164,7 @@ int set_identity_p2m_entry(struct domain *d, unsigned
long gfn_l,
struct p2m_domain *p2m = p2m_get_hostp2m(d);
int ret;
- if ( !paging_mode_translate(p2m->domain) )
+ if ( !paging_mode_translate(d) )
{
unsigned long frame = gfn_l;
@@ -1167,6 +1173,11 @@ int set_identity_p2m_entry(struct domain *d, unsigned
long gfn_l,
return iommu_map_page(d, _bfn(frame), _mfn(frame),
IOMMUF_readable | IOMMUF_writable);
+
+ if ( unlikely(ret) && !is_hardware_domain(d) )
+ domain_crash(d);
+
+ return ret;
}
gfn_lock(p2m, gfn, 0);
@@ -1259,7 +1270,12 @@ int clear_identity_p2m_entry(struct domain *d, unsigned
long gfn_l)
if ( !need_iommu(d) )
return 0;
- return iommu_unmap_page(d, _bfn(frame));
+ ret = iommu_unmap_page(d, _bfn(frame));
+
+ if ( unlikely(ret) && !is_hardware_domain(d) )
+ domain_crash(d);
+
+ return ret;
}
gfn_lock(p2m, gfn, 0);
diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index d0926d13e0..c6b99c4116 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -1156,6 +1156,9 @@ map_grant_ref(
}
if ( err )
{
+ if ( !is_hardware_domain(ld) )
+ domain_crash(ld);
+
double_gt_unlock(lgt, rgt);
rc = GNTST_general_error;
goto undo_out;
@@ -1423,7 +1426,12 @@ unmap_common(
double_gt_unlock(lgt, rgt);
if ( err )
+ {
+ if ( !is_hardware_domain(ld) )
+ domain_crash(ld);
+
rc = GNTST_general_error;
+ }
}
/* If just unmapped a writable mapping, mark as dirtied */
diff --git a/xen/common/memory.c b/xen/common/memory.c
index e42da275c3..35da9ca80e 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -843,6 +843,9 @@ int xenmem_add_to_physmap(struct domain *d, struct
xen_add_to_physmap *xatp,
ret = iommu_iotlb_flush(d, _bfn(frame), done);
if ( unlikely(ret) && rc >= 0 )
rc = ret;
+
+ if ( unlikely(rc < 0) && !is_hardware_domain(d) )
+ domain_crash(d);
}
#endif
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index 67a90a314f..7e59211a59 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -273,9 +273,6 @@ int iommu_map_page(struct domain *d, bfn_t bfn, mfn_t mfn,
printk(XENLOG_ERR
"d%d: IOMMU mapping bfn %"PRI_bfn" to mfn %"PRI_mfn"
failed: %d\n",
d->domain_id, bfn_x(bfn), mfn_x(mfn), rc);
-
- if ( !is_hardware_domain(d) )
- domain_crash(d);
}
return rc;
@@ -296,9 +293,6 @@ int iommu_unmap_page(struct domain *d, bfn_t bfn)
printk(XENLOG_ERR
"d%d: IOMMU unmapping bfn %"PRI_bfn" failed: %d\n",
d->domain_id, bfn_x(bfn), rc);
-
- if ( !is_hardware_domain(d) )
- domain_crash(d);
}
return rc;
@@ -336,9 +330,6 @@ int iommu_iotlb_flush(struct domain *d, bfn_t bfn, unsigned
int page_count)
printk(XENLOG_ERR
"d%d: IOMMU IOTLB flush failed: %d, bfn %"PRI_bfn", page
count %u\n",
d->domain_id, rc, bfn_x(bfn), page_count);
-
- if ( !is_hardware_domain(d) )
- domain_crash(d);
}
return rc;
@@ -359,9 +350,6 @@ int iommu_iotlb_flush_all(struct domain *d)
printk(XENLOG_ERR
"d%d: IOMMU IOTLB flush all failed: %d\n",
d->domain_id, rc);
-
- if ( !is_hardware_domain(d) )
- domain_crash(d);
}
return rc;
diff --git a/xen/drivers/passthrough/x86/iommu.c
b/xen/drivers/passthrough/x86/iommu.c
index 379882c690..9cd05d42d0 100644
--- a/xen/drivers/passthrough/x86/iommu.c
+++ b/xen/drivers/passthrough/x86/iommu.c
@@ -104,8 +104,13 @@ int arch_iommu_populate_page_table(struct domain *d)
this_cpu(iommu_dont_flush_iotlb) = 0;
if ( !rc )
+ {
rc = iommu_iotlb_flush_all(d);
+ if ( unlikely(rc) )
+ domain_crash(d);
+ }
+
if ( rc && rc != -ERESTART )
iommu_teardown(d);
--
2.11.0
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