From: Paul Durrant <paul.durrant@citrix.com>
To: xen-devel@lists.xenproject.org
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
Paul Durrant <paul.durrant@citrix.com>,
Jun Nakajima <jun.nakajima@intel.com>
Subject: [PATCH v13 2/9] iommu: make use of type-safe DFN and MFN in exported functions
Date: Tue, 2 Oct 2018 18:00:12 +0100 [thread overview]
Message-ID: <20181002170019.1911-3-paul.durrant@citrix.com> (raw)
In-Reply-To: <20181002170019.1911-1-paul.durrant@citrix.com>
This patch modifies the declaration of the entry points to the IOMMU
sub-system to use dfn_t and mfn_t in place of unsigned long. A subsequent
patch will similarly modify the methods in the iommu_ops structure.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Roger Pau Monne <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <julien.grall@arm.com>
---
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: George Dunlap <George.Dunlap@eu.citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Tim Deegan <tim@xen.org>
Cc: Jun Nakajima <jun.nakajima@intel.com>
Cc: George Dunlap <george.dunlap@eu.citrix.com>
v9:
- Re-base.
v7:
- Re-base and re-name BFN -> DFN.
- Added Jan's A-b since re-naming was purely mechanical.
v6:
- Re-base.
v3:
- Removed most of the uses of an intermediate 'frame' variable.
v2:
- Addressed comments from Jan.
- Use intermediate 'frame' variable to avoid directly encapsulating
mfn or gfn values as dfns.
---
xen/arch/arm/p2m.c | 3 ++-
xen/arch/x86/mm.c | 10 ++++----
xen/arch/x86/mm/p2m-ept.c | 10 +++++---
xen/arch/x86/mm/p2m-pt.c | 45 ++++++++++++++++++++---------------
xen/arch/x86/mm/p2m.c | 16 ++++++++-----
xen/arch/x86/x86_64/mm.c | 5 ++--
xen/common/grant_table.c | 12 +++++-----
xen/common/memory.c | 4 ++--
xen/drivers/passthrough/iommu.c | 25 ++++++++++---------
xen/drivers/passthrough/vtd/x86/vtd.c | 1 -
xen/drivers/passthrough/x86/iommu.c | 3 ++-
xen/include/xen/iommu.h | 14 +++++++----
12 files changed, 85 insertions(+), 63 deletions(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 1364e5960a..0db12b01f1 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -957,7 +957,8 @@ static int __p2m_set_entry(struct p2m_domain *p2m,
if ( need_iommu(p2m->domain) &&
(lpae_is_valid(orig_pte) || lpae_is_valid(*entry)) )
- rc = iommu_iotlb_flush(p2m->domain, gfn_x(sgfn), 1UL << page_order);
+ rc = iommu_iotlb_flush(p2m->domain, _dfn(gfn_x(sgfn)),
+ 1UL << page_order);
else
rc = 0;
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 02abd061be..546d98c864 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -2789,14 +2789,14 @@ static int _get_page_type(struct page_info *page, unsigned long type,
struct domain *d = page_get_owner(page);
if ( d && is_pv_domain(d) && unlikely(need_iommu(d)) )
{
- gfn_t gfn = _gfn(mfn_to_gmfn(d, mfn_x(page_to_mfn(page))));
+ mfn_t mfn = page_to_mfn(page);
if ( (x & PGT_type_mask) == PGT_writable_page )
- iommu_ret = iommu_unmap_page(d, gfn_x(gfn));
+ iommu_ret = iommu_unmap_page(d, _dfn(mfn_x(mfn)));
else if ( type == PGT_writable_page )
- iommu_ret = iommu_map_page(d, gfn_x(gfn),
- mfn_x(page_to_mfn(page)),
- IOMMUF_readable|IOMMUF_writable);
+ iommu_ret = iommu_map_page(d, _dfn(mfn_x(mfn)), mfn,
+ IOMMUF_readable |
+ IOMMUF_writable);
}
}
diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index d376966560..e0eb85bc3d 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -881,15 +881,19 @@ out:
rc = iommu_pte_flush(d, gfn, &ept_entry->epte, order, vtd_pte_present);
else
{
+ dfn_t dfn = _dfn(gfn);
+
if ( iommu_flags )
for ( i = 0; i < (1 << order); i++ )
{
- rc = iommu_map_page(d, gfn + i, mfn_x(mfn) + i, iommu_flags);
+ rc = iommu_map_page(d, dfn_add(dfn, i),
+ mfn_add(mfn, i), iommu_flags);
if ( unlikely(rc) )
{
while ( i-- )
/* If statement to satisfy __must_check. */
- if ( iommu_unmap_page(p2m->domain, gfn + i) )
+ if ( iommu_unmap_page(p2m->domain,
+ dfn_add(dfn, i)) )
continue;
break;
@@ -898,7 +902,7 @@ out:
else
for ( i = 0; i < (1 << order); i++ )
{
- ret = iommu_unmap_page(d, gfn + i);
+ ret = iommu_unmap_page(d, dfn_add(dfn, i));
if ( !rc )
rc = ret;
}
diff --git a/xen/arch/x86/mm/p2m-pt.c b/xen/arch/x86/mm/p2m-pt.c
index 33dd12969c..0569f1de80 100644
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -688,29 +688,36 @@ p2m_pt_set_entry(struct p2m_domain *p2m, gfn_t gfn_, mfn_t mfn,
if ( iommu_old_flags )
amd_iommu_flush_pages(p2m->domain, gfn, page_order);
}
- else if ( iommu_pte_flags )
- for ( i = 0; i < (1UL << page_order); i++ )
- {
- rc = iommu_map_page(p2m->domain, gfn + i, mfn_x(mfn) + i,
- iommu_pte_flags);
- if ( unlikely(rc) )
+ else
+ {
+ dfn_t dfn = _dfn(gfn);
+
+ if ( iommu_pte_flags )
+ for ( i = 0; i < (1UL << page_order); i++ )
{
- while ( i-- )
- /* If statement to satisfy __must_check. */
- if ( iommu_unmap_page(p2m->domain, gfn + i) )
- continue;
+ rc = iommu_map_page(p2m->domain, dfn_add(dfn, i),
+ mfn_add(mfn, i), iommu_pte_flags);
+ if ( unlikely(rc) )
+ {
+ while ( i-- )
+ /* If statement to satisfy __must_check. */
+ if ( iommu_unmap_page(p2m->domain,
+ dfn_add(dfn, i)) )
+ continue;
- break;
+ break;
+ }
}
- }
- else
- for ( i = 0; i < (1UL << page_order); i++ )
- {
- int ret = iommu_unmap_page(p2m->domain, gfn + i);
+ else
+ for ( i = 0; i < (1UL << page_order); i++ )
+ {
+ int ret = iommu_unmap_page(p2m->domain,
+ dfn_add(dfn, i));
- if ( !rc )
- rc = ret;
- }
+ if ( !rc )
+ rc = ret;
+ }
+ }
}
/*
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index d6a8810c96..e5c06e22c7 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -723,9 +723,11 @@ p2m_remove_page(struct p2m_domain *p2m, unsigned long gfn_l, unsigned long mfn,
if ( need_iommu(p2m->domain) )
{
+ dfn_t dfn = _dfn(mfn);
+
for ( i = 0; i < (1 << page_order); i++ )
{
- int ret = iommu_unmap_page(p2m->domain, mfn + i);
+ int ret = iommu_unmap_page(p2m->domain, dfn_add(dfn, i));
if ( !rc )
rc = ret;
@@ -782,16 +784,17 @@ guest_physmap_add_entry(struct domain *d, gfn_t gfn, mfn_t mfn,
{
if ( need_iommu(d) && t == p2m_ram_rw )
{
+ dfn_t dfn = _dfn(mfn_x(mfn));
+
for ( i = 0; i < (1 << page_order); i++ )
{
- rc = iommu_map_page(d, mfn_x(mfn_add(mfn, i)),
- mfn_x(mfn_add(mfn, i)),
+ rc = iommu_map_page(d, dfn_add(dfn, i), mfn_add(mfn, i),
IOMMUF_readable|IOMMUF_writable);
if ( rc != 0 )
{
while ( i-- > 0 )
/* If statement to satisfy __must_check. */
- if ( iommu_unmap_page(d, mfn_x(mfn_add(mfn, i))) )
+ if ( iommu_unmap_page(d, dfn_add(dfn, i)) )
continue;
return rc;
@@ -1170,7 +1173,8 @@ int set_identity_p2m_entry(struct domain *d, unsigned long gfn_l,
{
if ( !need_iommu(d) )
return 0;
- return iommu_map_page(d, gfn_l, gfn_l, IOMMUF_readable|IOMMUF_writable);
+ return iommu_map_page(d, _dfn(gfn_l), _mfn(gfn_l),
+ IOMMUF_readable | IOMMUF_writable);
}
gfn_lock(p2m, gfn, 0);
@@ -1260,7 +1264,7 @@ int clear_identity_p2m_entry(struct domain *d, unsigned long gfn_l)
{
if ( !need_iommu(d) )
return 0;
- return iommu_unmap_page(d, gfn_l);
+ return iommu_unmap_page(d, _dfn(gfn_l));
}
gfn_lock(p2m, gfn, 0);
diff --git a/xen/arch/x86/x86_64/mm.c b/xen/arch/x86/x86_64/mm.c
index 90a648c956..d1fce57432 100644
--- a/xen/arch/x86/x86_64/mm.c
+++ b/xen/arch/x86/x86_64/mm.c
@@ -1430,13 +1430,14 @@ int memory_add(unsigned long spfn, unsigned long epfn, unsigned int pxm)
!need_iommu(hardware_domain) )
{
for ( i = spfn; i < epfn; i++ )
- if ( iommu_map_page(hardware_domain, i, i, IOMMUF_readable|IOMMUF_writable) )
+ if ( iommu_map_page(hardware_domain, _dfn(i), _mfn(i),
+ IOMMUF_readable | IOMMUF_writable) )
break;
if ( i != epfn )
{
while (i-- > old_max)
/* If statement to satisfy __must_check. */
- if ( iommu_unmap_page(hardware_domain, i) )
+ if ( iommu_unmap_page(hardware_domain, _dfn(i)) )
continue;
goto destroy_m2p;
diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index 73d3ed3701..2d01cad176 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -1143,13 +1143,13 @@ map_grant_ref(
!(old_pin & (GNTPIN_hstw_mask|GNTPIN_devw_mask)) )
{
if ( !(kind & MAPKIND_WRITE) )
- err = iommu_map_page(ld, mfn_x(mfn), mfn_x(mfn),
- IOMMUF_readable|IOMMUF_writable);
+ err = iommu_map_page(ld, _dfn(mfn_x(mfn)), mfn,
+ IOMMUF_readable | IOMMUF_writable);
}
else if ( act_pin && !old_pin )
{
if ( !kind )
- err = iommu_map_page(ld, mfn_x(mfn), mfn_x(mfn),
+ err = iommu_map_page(ld, _dfn(mfn_x(mfn)), mfn,
IOMMUF_readable);
}
if ( err )
@@ -1398,10 +1398,10 @@ unmap_common(
kind = mapkind(lgt, rd, op->mfn);
if ( !kind )
- err = iommu_unmap_page(ld, mfn_x(op->mfn));
+ err = iommu_unmap_page(ld, _dfn(mfn_x(op->mfn)));
else if ( !(kind & MAPKIND_WRITE) )
- err = iommu_map_page(ld, mfn_x(op->mfn),
- mfn_x(op->mfn), IOMMUF_readable);
+ err = iommu_map_page(ld, _dfn(mfn_x(op->mfn)), op->mfn,
+ IOMMUF_readable);
double_gt_unlock(lgt, rgt);
diff --git a/xen/common/memory.c b/xen/common/memory.c
index 5c71ce13ce..238a28cabc 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -835,11 +835,11 @@ int xenmem_add_to_physmap(struct domain *d, struct xen_add_to_physmap *xatp,
this_cpu(iommu_dont_flush_iotlb) = 0;
- ret = iommu_iotlb_flush(d, xatp->idx - done, done);
+ ret = iommu_iotlb_flush(d, _dfn(xatp->idx - done), done);
if ( unlikely(ret) && rc >= 0 )
rc = ret;
- ret = iommu_iotlb_flush(d, xatp->gpfn - done, done);
+ ret = iommu_iotlb_flush(d, _dfn(xatp->gpfn - done), done);
if ( unlikely(ret) && rc >= 0 )
rc = ret;
}
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index 1ad77a7e7a..53419a8531 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -285,7 +285,7 @@ void iommu_domain_destroy(struct domain *d)
arch_iommu_domain_destroy(d);
}
-int iommu_map_page(struct domain *d, unsigned long dfn, unsigned long mfn,
+int iommu_map_page(struct domain *d, dfn_t dfn, mfn_t mfn,
unsigned int flags)
{
const struct domain_iommu *hd = dom_iommu(d);
@@ -294,13 +294,13 @@ int iommu_map_page(struct domain *d, unsigned long dfn, unsigned long mfn,
if ( !iommu_enabled || !hd->platform_ops )
return 0;
- rc = hd->platform_ops->map_page(d, dfn, mfn, flags);
+ rc = hd->platform_ops->map_page(d, dfn_x(dfn), mfn_x(mfn), flags);
if ( unlikely(rc) )
{
if ( !d->is_shutting_down && printk_ratelimit() )
printk(XENLOG_ERR
- "d%d: IOMMU mapping dfn %#lx to mfn %#lx failed: %d\n",
- d->domain_id, dfn, mfn, rc);
+ "d%d: IOMMU mapping dfn %"PRI_dfn" to mfn %"PRI_mfn" failed: %d\n",
+ d->domain_id, dfn_x(dfn), mfn_x(mfn), rc);
if ( !is_hardware_domain(d) )
domain_crash(d);
@@ -309,7 +309,7 @@ int iommu_map_page(struct domain *d, unsigned long dfn, unsigned long mfn,
return rc;
}
-int iommu_unmap_page(struct domain *d, unsigned long dfn)
+int iommu_unmap_page(struct domain *d, dfn_t dfn)
{
const struct domain_iommu *hd = dom_iommu(d);
int rc;
@@ -317,13 +317,13 @@ int iommu_unmap_page(struct domain *d, unsigned long dfn)
if ( !iommu_enabled || !hd->platform_ops )
return 0;
- rc = hd->platform_ops->unmap_page(d, dfn);
+ rc = hd->platform_ops->unmap_page(d, dfn_x(dfn));
if ( unlikely(rc) )
{
if ( !d->is_shutting_down && printk_ratelimit() )
printk(XENLOG_ERR
- "d%d: IOMMU unmapping dfn %#lx failed: %d\n",
- d->domain_id, dfn, rc);
+ "d%d: IOMMU unmapping dfn %"PRI_dfn" failed: %d\n",
+ d->domain_id, dfn_x(dfn), rc);
if ( !is_hardware_domain(d) )
domain_crash(d);
@@ -349,8 +349,7 @@ static void iommu_free_pagetables(unsigned long unused)
cpumask_cycle(smp_processor_id(), &cpu_online_map));
}
-int iommu_iotlb_flush(struct domain *d, unsigned long dfn,
- unsigned int page_count)
+int iommu_iotlb_flush(struct domain *d, dfn_t dfn, unsigned int page_count)
{
const struct domain_iommu *hd = dom_iommu(d);
int rc;
@@ -358,13 +357,13 @@ int iommu_iotlb_flush(struct domain *d, unsigned long dfn,
if ( !iommu_enabled || !hd->platform_ops || !hd->platform_ops->iotlb_flush )
return 0;
- rc = hd->platform_ops->iotlb_flush(d, dfn, page_count);
+ rc = hd->platform_ops->iotlb_flush(d, dfn_x(dfn), page_count);
if ( unlikely(rc) )
{
if ( !d->is_shutting_down && printk_ratelimit() )
printk(XENLOG_ERR
- "d%d: IOMMU IOTLB flush failed: %d, dfn %#lx, page count %u\n",
- d->domain_id, rc, dfn, page_count);
+ "d%d: IOMMU IOTLB flush failed: %d, dfn %"PRI_dfn", page count %u\n",
+ d->domain_id, rc, dfn_x(dfn), page_count);
if ( !is_hardware_domain(d) )
domain_crash(d);
diff --git a/xen/drivers/passthrough/vtd/x86/vtd.c b/xen/drivers/passthrough/vtd/x86/vtd.c
index 48e16f956b..ff456e1e70 100644
--- a/xen/drivers/passthrough/vtd/x86/vtd.c
+++ b/xen/drivers/passthrough/vtd/x86/vtd.c
@@ -60,4 +60,3 @@ void flush_all_cache()
{
wbinvd();
}
-
diff --git a/xen/drivers/passthrough/x86/iommu.c b/xen/drivers/passthrough/x86/iommu.c
index b7c8b5be41..f9bd1c8bb2 100644
--- a/xen/drivers/passthrough/x86/iommu.c
+++ b/xen/drivers/passthrough/x86/iommu.c
@@ -235,7 +235,8 @@ void __hwdom_init arch_iommu_hwdom_init(struct domain *d)
if ( paging_mode_translate(d) )
rc = set_identity_p2m_entry(d, pfn, p2m_access_rw, 0);
else
- rc = iommu_map_page(d, pfn, pfn, IOMMUF_readable|IOMMUF_writable);
+ rc = iommu_map_page(d, _dfn(pfn), _mfn(pfn),
+ IOMMUF_readable | IOMMUF_writable);
if ( rc )
printk(XENLOG_WARNING " d%d: IOMMU mapping failed: %d\n",
d->domain_id, rc);
diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h
index 290e0aada6..f9d86fc816 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -24,6 +24,7 @@
#include <xen/spinlock.h>
#include <xen/pci.h>
#include <xen/typesafe.h>
+#include <xen/mm.h>
#include <public/hvm/ioreq.h>
#include <public/domctl.h>
#include <asm/device.h>
@@ -42,6 +43,11 @@ TYPE_SAFE(uint64_t, dfn);
#undef dfn_x
#endif
+static inline dfn_t dfn_add(dfn_t dfn, unsigned long i)
+{
+ return _dfn(dfn_x(dfn) + i);
+}
+
extern bool_t iommu_enable, iommu_enabled;
extern bool_t force_iommu, iommu_verbose;
extern bool_t iommu_workaround_bios_bug, iommu_igfx;
@@ -78,9 +84,9 @@ void iommu_teardown(struct domain *d);
#define IOMMUF_readable (1u<<_IOMMUF_readable)
#define _IOMMUF_writable 1
#define IOMMUF_writable (1u<<_IOMMUF_writable)
-int __must_check iommu_map_page(struct domain *d, unsigned long dfn,
- unsigned long mfn, unsigned int flags);
-int __must_check iommu_unmap_page(struct domain *d, unsigned long dfn);
+int __must_check iommu_map_page(struct domain *d, dfn_t dfn,
+ mfn_t mfn, unsigned int flags);
+int __must_check iommu_unmap_page(struct domain *d, dfn_t dfn);
enum iommu_feature
{
@@ -203,7 +209,7 @@ int iommu_do_pci_domctl(struct xen_domctl *, struct domain *d,
int iommu_do_domctl(struct xen_domctl *, struct domain *d,
XEN_GUEST_HANDLE_PARAM(xen_domctl_t));
-int __must_check iommu_iotlb_flush(struct domain *d, unsigned long dfn,
+int __must_check iommu_iotlb_flush(struct domain *d, dfn_t dfn,
unsigned int page_count);
int __must_check iommu_iotlb_flush_all(struct domain *d);
--
2.11.0
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next prev parent reply other threads:[~2018-10-02 17:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-02 17:00 [PATCH v13 0/9] paravirtual IOMMU pre-requisites and clean-up Paul Durrant
2018-10-02 17:00 ` [PATCH v13 1/9] iommu: introduce the concept of DFN Paul Durrant
2018-10-03 10:12 ` Suthikulpanit, Suravee
2018-10-02 17:00 ` Paul Durrant [this message]
2018-10-02 17:00 ` [PATCH v13 3/9] iommu: push use of type-safe DFN and MFN into iommu_ops Paul Durrant
2018-10-03 10:38 ` Suthikulpanit, Suravee
2018-10-02 17:00 ` [PATCH v13 4/9] iommu: don't domain_crash() inside iommu_map/unmap_page() Paul Durrant
2018-10-02 17:00 ` [PATCH v13 5/9] memory: add check_get_page_from_gfn() as a wrapper Paul Durrant
2018-10-02 17:00 ` [PATCH v13 6/9] vtd: add missing check for shared EPT Paul Durrant
2018-10-02 17:00 ` [PATCH v13 7/9] vtd: add lookup_page method to iommu_ops Paul Durrant
2018-10-02 17:00 ` [PATCH v13 8/9] mm / iommu: include need_iommu() test in iommu_use_hap_pt() Paul Durrant
2018-10-02 17:00 ` [PATCH v13 9/9] mm / iommu: split need_iommu() into has_iommu_pt() and need_iommu_pt_sync() Paul Durrant
2018-10-02 17:03 ` [PATCH v13 0/9] paravirtual IOMMU pre-requisites and clean-up Paul Durrant
2018-10-04 10:23 ` Paul Durrant
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