amd iommu: Add ATS support (v4)

Quoted 1 line

Quoted 1 line · Wei Wang

# HG changeset patch
# User Wei Wang <[email protected]>
# Date 1320334551 -3600
# Node ID ef46c471a11f83d07e256ad2e0b868828f45ef63
# Parent 119bccb1cc5eee1364bbbd3bd1a30f22e9db703a
ats: Move some ats functions to a new directory. Remove VTD prefix from debug output.
passhrough/x86 holds vendor neutral codes for x86 architecture.

Signed-off-by Wei Wang <[email protected]>

diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/Makefile

xen/drivers/passthrough/Makefile +1 -0

@@ -1,6 +1,7 @@
 subdir-$(x86) += vtd
 subdir-$(ia64) += vtd
 subdir-$(x86) += amd
+subdir-$(x86_64) += x86
 
 obj-y += iommu.o
 obj-y += io.o

diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/ats.h

xen/drivers/passthrough/ats.h new file +8 -0

@@ -0,0 +1,56 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 

for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */

xen/drivers/passthrough/ats.h new file +42 -0

+
+#ifndef _ATS_H_
+#define _ATS_H_
+
+struct pci_ats_dev {
+    struct list_head list;
+    u16 seg;
+    u8 bus;
+    u8 devfn;
+    u16 ats_queue_depth;    /* ATS device invalidation queue depth */
+};
+
+#ifdef CONFIG_X86_64
+
+#define ATS_REG_CAP    4
+#define ATS_REG_CTL    6
+#define ATS_QUEUE_DEPTH_MASK     0xF
+#define ATS_ENABLE               (1<<15)
+
+extern struct list_head ats_devices;
+extern bool_t ats_enabled;
+
+int enable_ats_device(int seg, int bus, int devfn);
+void disable_ats_device(int seg, int bus, int devfn);
+
+#else
+
+#define ats_enabled 0
+static inline int enable_ats_device(int seg, int bus, int devfn)
+{
+    BUG();
+    return -ENOSYS;
+}
+
+static inline void disable_ats_device(int seg, int bus, int devfn)
+{
+    BUG();
+}
+#endif
+
+#endif /* _ATS_H_ */
+

diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/vtd/extern.h

xen/drivers/passthrough/vtd/extern.h +0 -14

@@ -57,18 +57,13 @@ struct acpi_drhd_unit * iommu_to_drhd(st
 struct acpi_rhsa_unit * drhd_to_rhsa(struct acpi_drhd_unit *drhd);
 
 #ifdef CONFIG_X86_64
-extern bool_t ats_enabled;
-
 struct acpi_drhd_unit * find_ats_dev_drhd(struct iommu *iommu);
 
 int ats_device(const struct pci_dev *, const struct acpi_drhd_unit *);
-int enable_ats_device(int seg, int bus, int devfn);
-void disable_ats_device(int seg, int bus, int devfn);
 
 int dev_invalidate_iotlb(struct iommu *iommu, u16 did,
                          u64 addr, unsigned int size_order, u64 type);
 #else
-#define ats_enabled 0
 
 static inline struct acpi_drhd_unit *find_ats_dev_drhd(struct iommu *iommu)
 {

@@ -80,15 +75,6 @@ static inline int ats_device(const struc
 {
     return 0;
 }
-static inline int enable_ats_device(int seg, int bus, int devfn)
-{
-    BUG();
-    return -ENOSYS;
-}
-static inline void disable_ats_device(int seg, int bus, int devfn)
-{
-    BUG();
-}
 
 static inline int dev_invalidate_iotlb(struct iommu *iommu, u16 did, u64 
 addr,

unsigned int size_order, u64 type)
diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/vtd/iommu.c

xen/drivers/passthrough/vtd/iommu.c +1 -0

@@ -40,6 +40,7 @@
 #include "dmar.h"
 #include "extern.h"
 #include "vtd.h"
+#include "../ats.h"
 
 #ifdef __ia64__
 #define nr_ioapics              iosapic_get_nr_iosapics()

diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/vtd/x86/ats.c

xen/drivers/passthrough/vtd/x86/ats.c +1 -133

@@ -27,51 +27,10 @@
 #include "../dmar.h"
 #include "../vtd.h"
 #include "../extern.h"
+#include "../../ats.h"
 
 static LIST_HEAD(ats_dev_drhd_units);
 
-#define ATS_REG_CAP    4
-#define ATS_REG_CTL    6
-#define ATS_QUEUE_DEPTH_MASK     0xF
-#define ATS_ENABLE               (1<<15)
-
-struct pci_ats_dev {
-    struct list_head list;
-    u16 seg;
-    u8 bus;
-    u8 devfn;
-    u16 ats_queue_depth;    /* ATS device invalidation queue depth */
-};
-static LIST_HEAD(ats_devices);
-
-static void parse_ats_param(char *s);
-custom_param("ats", parse_ats_param);
-
-bool_t __read_mostly ats_enabled = 1;
-
-static void __init parse_ats_param(char *s)
-{
-    char *ss;
-
-    do {
-        ss = strchr(s, ',');
-        if ( ss )
-            *ss = '\0';
-
-        switch ( parse_bool(s) )
-        {
-        case 0:
-            ats_enabled = 0;
-            break;
-        case 1:
-            ats_enabled = 1;
-            break;
-        }
-
-        s = ss + 1;
-    } while ( ss );
-}
-
 struct acpi_drhd_unit * find_ats_dev_drhd(struct iommu *iommu)
 {
     struct acpi_drhd_unit *drhd;

@@ -113,97 +72,6 @@ int ats_device(const struct pci_dev *pde
     return pos;
 }
 
-int enable_ats_device(int seg, int bus, int devfn)
-{
-    struct pci_ats_dev *pdev = NULL;
-    u32 value;
-    int pos;
-
-    pos = pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
-    BUG_ON(!pos);
-
-    if ( iommu_verbose )
-        dprintk(XENLOG_INFO VTDPREFIX,
-                "%04x:%02x:%02x.%u: ATS capability found\n",
-                seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
-
-    value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
-                            PCI_FUNC(devfn), pos + ATS_REG_CTL);
-    if ( value & ATS_ENABLE )
-    {
-        list_for_each_entry ( pdev, &ats_devices, list )
-        {
-            if ( pdev->seg == seg && pdev->bus == bus && pdev->devfn == devfn )
-            {
-                pos = 0;
-                break;
-            }
-        }
-    }
-    if ( pos )
-        pdev = xmalloc(struct pci_ats_dev);
-    if ( !pdev )
-        return -ENOMEM;
-
-    if ( !(value & ATS_ENABLE) )
-    {
-        value |= ATS_ENABLE;
-        pci_conf_write16(seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
-                         pos + ATS_REG_CTL, value);
-    }
-
-    if ( pos )
-    {
-        pdev->seg = seg;
-        pdev->bus = bus;
-        pdev->devfn = devfn;
-        value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
-                                PCI_FUNC(devfn), pos + ATS_REG_CAP);
-        pdev->ats_queue_depth = value & ATS_QUEUE_DEPTH_MASK;
-        list_add(&pdev->list, &ats_devices);
-    }
-
-    if ( iommu_verbose )
-        dprintk(XENLOG_INFO VTDPREFIX,
-                "%04x:%02x:%02x.%u: ATS %s enabled\n",
-                seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
-                pos ? "is" : "was");
-
-    return pos;
-}
-
-void disable_ats_device(int seg, int bus, int devfn)
-{
-    struct pci_ats_dev *pdev;
-    u32 value;
-    int pos;
-
-    pos = pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
-    BUG_ON(!pos);
-
-    value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
-                            PCI_FUNC(devfn), pos + ATS_REG_CTL);
-    value &= ~ATS_ENABLE;
-    pci_conf_write16(seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
-                     pos + ATS_REG_CTL, value);
-
-    list_for_each_entry ( pdev, &ats_devices, list )
-    {
-        if ( pdev->seg == seg && pdev->bus == bus && pdev->devfn == devfn )
-        {
-            list_del(&pdev->list);
-            xfree(pdev);
-            break;
-        }
-    }
-
-    if ( iommu_verbose )
-        dprintk(XENLOG_INFO VTDPREFIX,
-                "%04x:%02x:%02x.%u: ATS is disabled\n",
-                seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
-}
-
-
 static int device_in_domain(struct iommu *iommu, struct pci_ats_dev *pdev, 
 u16 did)
 {

     struct root_entry *root_entry = NULL;

diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/x86/Makefile

xen/drivers/passthrough/x86/Makefile new file +1 -0

@@ -0,0 +1,1 @@
+obj-$(CONFIG_X86_64) += ats.o

diff -r 119bccb1cc5e -r ef46c471a11f xen/drivers/passthrough/x86/ats.c

xen/drivers/passthrough/x86/ats.c new file +8 -0

@@ -0,0 +1,136 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 

for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */

xen/drivers/passthrough/x86/ats.c new file +122 -0

+
+#include <xen/sched.h>
+#include <xen/pci.h>
+#include <xen/pci_regs.h>
+#include "../ats.h"
+
+LIST_HEAD(ats_devices);
+
+static void parse_ats_param(char *s);
+custom_param("ats", parse_ats_param);
+
+bool_t __read_mostly ats_enabled = 1;
+
+static void __init parse_ats_param(char *s)
+{
+    char *ss;
+
+    do {
+        ss = strchr(s, ',');
+        if ( ss )
+            *ss = '\0';
+
+        switch ( parse_bool(s) )
+        {
+        case 0:
+            ats_enabled = 0;
+            break;
+        case 1:
+            ats_enabled = 1;
+            break;
+        }
+
+        s = ss + 1;
+    } while ( ss );
+}
+
+int enable_ats_device(int seg, int bus, int devfn)
+{
+    struct pci_ats_dev *pdev = NULL;
+    u32 value;
+    int pos;
+
+    pos = pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
+    BUG_ON(!pos);
+
+    if ( iommu_verbose )
+        dprintk(XENLOG_INFO, "%04x:%02x:%02x.%u: ATS capability found\n",
+                seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
+
+    value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
+                            PCI_FUNC(devfn), pos + ATS_REG_CTL);
+    if ( value & ATS_ENABLE )
+    {
+        list_for_each_entry ( pdev, &ats_devices, list )
+        {
+            if ( pdev->seg == seg && pdev->bus == bus && pdev->devfn == devfn )
+            {
+                pos = 0;
+                break;
+            }
+        }
+    }
+    if ( pos )
+        pdev = xmalloc(struct pci_ats_dev);
+    if ( !pdev )
+        return -ENOMEM;
+
+    if ( !(value & ATS_ENABLE) )
+    {
+        value |= ATS_ENABLE;
+        pci_conf_write16(seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
+                         pos + ATS_REG_CTL, value);
+    }
+
+    if ( pos )
+    {
+        pdev->seg = seg;
+        pdev->bus = bus;
+        pdev->devfn = devfn;
+        value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
+                                PCI_FUNC(devfn), pos + ATS_REG_CAP);
+        pdev->ats_queue_depth = value & ATS_QUEUE_DEPTH_MASK;
+        list_add(&pdev->list, &ats_devices);
+    }
+
+    if ( iommu_verbose )
+        dprintk(XENLOG_INFO, "%04x:%02x:%02x.%u: ATS %s enabled\n",
+                seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
+                pos ? "is" : "was");
+
+    return pos;
+}
+
+void disable_ats_device(int seg, int bus, int devfn)
+{
+    struct pci_ats_dev *pdev;
+    u32 value;
+    int pos;
+
+    pos = pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
+    BUG_ON(!pos);
+
+    value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
+                            PCI_FUNC(devfn), pos + ATS_REG_CTL);
+    value &= ~ATS_ENABLE;
+    pci_conf_write16(seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn),
+                     pos + ATS_REG_CTL, value);
+
+    list_for_each_entry ( pdev, &ats_devices, list )
+    {
+        if ( pdev->seg == seg && pdev->bus == bus && pdev->devfn == devfn )
+        {
+            list_del(&pdev->list);
+            xfree(pdev);
+            break;
+        }
+    }
+
+    if ( iommu_verbose )
+        dprintk(XENLOG_INFO, "%04x:%02x:%02x.%u: ATS is disabled\n",
+                seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
+}

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Quoted 1 line

Quoted 1 line · Wei Wang

# HG changeset patch
# User Wei Wang <[email protected]>
# Date 1320334553 -3600
# Node ID 1bf06c8d2c70e9af610e12a7592c466a799b0de1 # Parent ef46c471a11f83d07e256ad2e0b868828f45ef63 amd iommu: Fix iommu page size encoding when page order > 0. Fix io address in invalid all pages command.

Signed-off-by Wei Wang <[email protected]>

diff -r ef46c471a11f -r 1bf06c8d2c70 xen/drivers/passthrough/amd/iommu_map.c

xen/drivers/passthrough/amd/iommu_map.c +14 -13

@@ -77,23 +77,24 @@ static void invalidate_iommu_pages(struc
 {
     u64 addr_lo, addr_hi;
     u32 cmd[4], entry;
-    u64 mask = 0;
     int sflag = 0, pde = 0;
 
+    ASSERT ( order == 0 || order == 9 || order == 18 );
+
+    /* All pages associated with the domainID are invalidated */
+    if ( order || (io_addr == INV_IOMMU_ALL_PAGES_ADDRESS ) )
+    {
+        sflag = 1;
+        pde = 1;
+    }
+
     /* If sflag == 1, the size of the invalidate command is determined
      by the first zero bit in the address starting from Address[12] */
-    if ( order == 9 || order == 18 )
+    if ( order )
     {
-        mask = ((1ULL << (order - 1)) - 1) << PAGE_SHIFT;
-        io_addr |= mask;
-        sflag = 1;
-    }
-
-    /* All pages associated with the domainID are invalidated */
-    else if ( io_addr == 0x7FFFFFFFFFFFF000ULL )
-    {
-        sflag = 1;
-        pde = 1;
+        u64 mask = 1ULL << (order - 1 + PAGE_SHIFT);
+        io_addr &= ~mask;
+        io_addr |= mask - 1;
     }
 
     addr_lo = io_addr & DMA_32BIT_MASK;

@@ -917,7 +918,7 @@ static void _amd_iommu_flush_pages(struc
 
 void amd_iommu_flush_all_pages(struct domain *d)
 {
-    _amd_iommu_flush_pages(d, 0x7FFFFFFFFFFFFULL, 0);
+    _amd_iommu_flush_pages(d, INV_IOMMU_ALL_PAGES_ADDRESS, 0);
 }
 
 void amd_iommu_flush_pages(struct domain *d,

diff -r ef46c471a11f -r 1bf06c8d2c70 xen/include/asm-x86/hvm/svm/amd-iommu-defs.h

xen/include/asm-x86/hvm/svm/amd-iommu-defs.h +1 -0

+0100

xen/include/asm-x86/hvm/svm/amd-iommu-defs.h +1 -0

+
 #endif /* _ASM_X86_64_AMD_IOMMU_DEFS_H */

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Quoted 71 lines

Quoted 1 line

Quoted 1 line · Wei Wang

# HG changeset patch
# User Wei Wang <[email protected]>
# Date 1320334553 -3600
# Node ID 1bf06c8d2c70e9af610e12a7592c466a799b0de1 # Parent ef46c471a11f83d07e256ad2e0b868828f45ef63 amd iommu: Fix iommu page size encoding when page order > 0. Fix io address in invalid all pages command.

Signed-off-by Wei Wang <[email protected]>

diff -r ef46c471a11f -r 1bf06c8d2c70 xen/drivers/passthrough/amd/iommu_map.c ---
a/xen/drivers/passthrough/amd/iommu_map.c Thu Nov 03 16:35:51 2011 +0100
+++ b/xen/drivers/passthrough/amd/iommu_map.c Thu Nov 03 16:35:53 2011
+0100 @@ -77,23 +77,24 @@ static void invalidate_iommu_pages(struc

 {
     u64 addr_lo, addr_hi;
     u32 cmd[4], entry;

(quoted diff) +14 -13

-    u64 mask = 0;
     int sflag = 0, pde = 0;
 
+    ASSERT ( order == 0 || order == 9 || order == 18 );
+
+    /* All pages associated with the domainID are invalidated */
+    if ( order || (io_addr == INV_IOMMU_ALL_PAGES_ADDRESS ) )
+    {
+        sflag = 1;
+        pde = 1;
+    }
+
     /* If sflag == 1, the size of the invalidate command is determined
      by the first zero bit in the address starting from Address[12] */
-    if ( order == 9 || order == 18 )
+    if ( order )
     {
-        mask = ((1ULL << (order - 1)) - 1) << PAGE_SHIFT;
-        io_addr |= mask;
-        sflag = 1;
-    }
-
-    /* All pages associated with the domainID are invalidated */
-    else if ( io_addr == 0x7FFFFFFFFFFFF000ULL )
-    {
-        sflag = 1;
-        pde = 1;
+        u64 mask = 1ULL << (order - 1 + PAGE_SHIFT);
+        io_addr &= ~mask;
+        io_addr |= mask - 1;
     }
 
     addr_lo = io_addr & DMA_32BIT_MASK;

@@ -917,7 +918,7 @@ static void _amd_iommu_flush_pages(struc
 
 void amd_iommu_flush_all_pages(struct domain *d)
 {
-    _amd_iommu_flush_pages(d, 0x7FFFFFFFFFFFFULL, 0);
+    _amd_iommu_flush_pages(d, INV_IOMMU_ALL_PAGES_ADDRESS, 0);
 }
 
 void amd_iommu_flush_pages(struct domain *d,

diff -r ef46c471a11f -r 1bf06c8d2c70
xen/include/asm-x86/hvm/svm/amd-iommu-defs.h ---
a/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h Thu Nov 03 16:35:51 2011
+0100 +++ b/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h Thu Nov 03
16:35:53 2011 +0100

(quoted diff) +0 -0

@@ -407,4 +407,6 @@
 #define INT_REMAP_ENTRY_VECTOR_MASK     0x00FF0000
 #define INT_REMAP_ENTRY_VECTOR_SHIFT    16
 

Review line 410

Quoted 1 line

(quoted diff) +1 -0

+#define INV_IOMMU_ALL_PAGES_ADDRESS      (1ULL << 63) - 1

Please parenthesize this properly.

Quoted 8 lines

(quoted diff) +1 -0

+
 #endif /* _ASM_X86_64_AMD_IOMMU_DEFS_H */

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Quoted 1 line

Quoted 1 line · Wei Wang

# HG changeset patch
# User Wei Wang <[email protected]>
# Date 1320334760 -3600
# Node ID f1b4373838dd5e082755201745f87654e2eaa59f # Parent 1bf06c8d2c70e9af610e12a7592c466a799b0de1
ats: Add new ATS helper functions

Signed-off-by Wei Wang <[email protected]>

diff -r 1bf06c8d2c70 -r f1b4373838dd xen/drivers/passthrough/ats.h

xen/drivers/passthrough/ats.h +40 -0

@@ -16,6 +16,8 @@
 #ifndef _ATS_H_
 #define _ATS_H_
 
+#include <xen/pci_regs.h>
+
 struct pci_ats_dev {
     struct list_head list;
     u16 seg;

@@ -36,6 +38,28 @@ extern bool_t ats_enabled;
 
 int enable_ats_device(int seg, int bus, int devfn);
 void disable_ats_device(int seg, int bus, int devfn);
+struct pci_ats_dev *get_ats_device(int seg, int bus, int devfn);
+
+static inline int pci_ats_enabled(int seg, int bus, int devfn)
+{
+    u32 value;
+    int pos;
+
+    pos = pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
+    BUG_ON(!pos);
+
+    value = pci_conf_read16(seg, bus, PCI_SLOT(devfn),
+                            PCI_FUNC(devfn), pos + ATS_REG_CTL);
+    return value & ATS_ENABLE;
+}
+
+static inline int pci_ats_device(int seg, int bus, int devfn)
+{
+    if ( !ats_enabled )
+        return 0;
+
+    return pci_find_ext_capability(seg, bus, devfn, PCI_EXT_CAP_ID_ATS);
+}
 
 #else
 

@@ -50,6 +74,22 @@ static inline void disable_ats_device(in
 {
     BUG();
 }
+
+static inline int pci_ats_enabled(int seg, int bus, int devfn)
+{
+    return 0;
+}
+
+static inline int pci_ats_device(int seg, int bus, int devfn)
+{
+    return 0;
+}
+
+static inline struct pci_ats_dev *get_ats_device(int seg, int bus, int 
 devfn)
+{
+    return NULL;
+}
+
 #endif
 

#endif /* _ATS_H_ */
diff -r 1bf06c8d2c70 -r f1b4373838dd xen/drivers/passthrough/x86/ats.c

xen/drivers/passthrough/x86/ats.c +16 -0

@@ -134,3 +134,19 @@ void disable_ats_device(int seg, int bus
         dprintk(XENLOG_INFO, "%04x:%02x:%02x.%u: ATS is disabled\n",
                 seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
 }
+
+struct pci_ats_dev *get_ats_device(int seg, int bus, int devfn)
+{
+    struct pci_ats_dev *pdev;
+
+    if ( !pci_ats_device(seg, bus, devfn) )
+        return NULL;
+
+    list_for_each_entry ( pdev, &ats_devices, list )
+    {
+        if ( pdev->seg == seg && pdev->bus == bus && pdev->devfn == devfn )
+            return pdev;
+    }
+
+    return NULL;
+}

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