|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH V6 11/24] xen/mm: Make x86's XENMEM_resource_ioreq_server handling common
From: Julien Grall <julien.grall@xxxxxxx>
As x86 implementation of XENMEM_resource_ioreq_server can be
re-used on Arm later on, this patch makes it common and removes
arch_acquire_resource (and the corresponding option) as unneeded.
Also re-order #include-s alphabetically.
This support is going to be used on Arm to be able run device
emulator outside of Xen hypervisor.
Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Paul Durrant <paul@xxxxxxx>
[On Arm only]
Tested-by: Wei Chen <Wei.Chen@xxxxxxx>
---
Please note, this is a split/cleanup/hardening of Julien's PoC:
"Add support for Guest IO forwarding to a device emulator"
Changes RFC -> V1:
- no changes
Changes V1 -> V2:
- update the author of a patch
Changes V2 -> V3:
- don't wrap #include <xen/ioreq.h>
- limit the number of #ifdef-s
- re-order #include-s alphabetically
Changes V3 -> V4:
- rebase
- Add Jan's R-b
Changes V4 -> V5:
- add Paul's R-b
- update patch description
- remove ARCH_ACQUIRE_RESOURCE option, etc
Changes V5 -> V6:
- no changes
---
---
xen/arch/x86/Kconfig | 1 -
xen/arch/x86/mm.c | 44 ---------------------------------
xen/common/Kconfig | 3 ---
xen/common/memory.c | 63 +++++++++++++++++++++++++++++++++++++++---------
xen/include/asm-x86/mm.h | 4 ---
xen/include/xen/mm.h | 9 -------
6 files changed, 51 insertions(+), 73 deletions(-)
diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index ea9a9ea..abe0fce 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -6,7 +6,6 @@ config X86
select ACPI
select ACPI_LEGACY_TABLES_LOOKUP
select ARCH_SUPPORTS_INT128
- select ARCH_ACQUIRE_RESOURCE
select COMPAT
select CORE_PARKING
select HAS_ALTERNATIVE
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 59eb5c8..4366ea3 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -4587,50 +4587,6 @@ static int handle_iomem_range(unsigned long s, unsigned
long e, void *p)
return err || s > e ? err : _handle_iomem_range(s, e, p);
}
-int arch_acquire_resource(struct domain *d, unsigned int type,
- unsigned int id, unsigned long frame,
- unsigned int nr_frames, xen_pfn_t mfn_list[])
-{
- int rc;
-
- switch ( type )
- {
-#ifdef CONFIG_HVM
- case XENMEM_resource_ioreq_server:
- {
- ioservid_t ioservid = id;
- unsigned int i;
-
- rc = -EINVAL;
- if ( !is_hvm_domain(d) )
- break;
-
- if ( id != (unsigned int)ioservid )
- break;
-
- rc = 0;
- for ( i = 0; i < nr_frames; i++ )
- {
- mfn_t mfn;
-
- rc = hvm_get_ioreq_server_frame(d, id, frame + i, &mfn);
- if ( rc )
- break;
-
- mfn_list[i] = mfn_x(mfn);
- }
- break;
- }
-#endif
-
- default:
- rc = -EOPNOTSUPP;
- break;
- }
-
- return rc;
-}
-
long arch_memory_op(unsigned long cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
{
int rc;
diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index cf32a07..fa049a6 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -22,9 +22,6 @@ config GRANT_TABLE
If unsure, say Y.
-config ARCH_ACQUIRE_RESOURCE
- bool
-
config HAS_ALTERNATIVE
bool
diff --git a/xen/common/memory.c b/xen/common/memory.c
index ccb4d49..2f274a6 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -8,22 +8,23 @@
*/
#include <xen/domain_page.h>
-#include <xen/types.h>
+#include <xen/errno.h>
+#include <xen/event.h>
+#include <xen/grant_table.h>
+#include <xen/guest_access.h>
+#include <xen/hypercall.h>
+#include <xen/iocap.h>
+#include <xen/ioreq.h>
#include <xen/lib.h>
+#include <xen/mem_access.h>
#include <xen/mm.h>
+#include <xen/numa.h>
+#include <xen/paging.h>
#include <xen/param.h>
#include <xen/perfc.h>
#include <xen/sched.h>
-#include <xen/event.h>
-#include <xen/paging.h>
-#include <xen/iocap.h>
-#include <xen/guest_access.h>
-#include <xen/hypercall.h>
-#include <xen/errno.h>
-#include <xen/numa.h>
-#include <xen/mem_access.h>
#include <xen/trace.h>
-#include <xen/grant_table.h>
+#include <xen/types.h>
#include <asm/current.h>
#include <asm/hardirq.h>
#include <asm/p2m.h>
@@ -1091,6 +1092,40 @@ static int acquire_grant_table(struct domain *d,
unsigned int id,
return 0;
}
+static int acquire_ioreq_server(struct domain *d,
+ unsigned int id,
+ unsigned long frame,
+ unsigned int nr_frames,
+ xen_pfn_t mfn_list[])
+{
+#ifdef CONFIG_IOREQ_SERVER
+ ioservid_t ioservid = id;
+ unsigned int i;
+ int rc;
+
+ if ( !is_hvm_domain(d) )
+ return -EINVAL;
+
+ if ( id != (unsigned int)ioservid )
+ return -EINVAL;
+
+ for ( i = 0; i < nr_frames; i++ )
+ {
+ mfn_t mfn;
+
+ rc = hvm_get_ioreq_server_frame(d, id, frame + i, &mfn);
+ if ( rc )
+ return rc;
+
+ mfn_list[i] = mfn_x(mfn);
+ }
+
+ return 0;
+#else
+ return -EOPNOTSUPP;
+#endif
+}
+
static int acquire_resource(
XEN_GUEST_HANDLE_PARAM(xen_mem_acquire_resource_t) arg)
{
@@ -1149,9 +1184,13 @@ static int acquire_resource(
mfn_list);
break;
+ case XENMEM_resource_ioreq_server:
+ rc = acquire_ioreq_server(d, xmar.id, xmar.frame, xmar.nr_frames,
+ mfn_list);
+ break;
+
default:
- rc = arch_acquire_resource(d, xmar.type, xmar.id, xmar.frame,
- xmar.nr_frames, mfn_list);
+ rc = -EOPNOTSUPP;
break;
}
diff --git a/xen/include/asm-x86/mm.h b/xen/include/asm-x86/mm.h
index 1fdb4eb..041c158 100644
--- a/xen/include/asm-x86/mm.h
+++ b/xen/include/asm-x86/mm.h
@@ -640,8 +640,4 @@ static inline bool arch_mfn_in_directmap(unsigned long mfn)
return mfn <= (virt_to_mfn(eva - 1) + 1);
}
-int arch_acquire_resource(struct domain *d, unsigned int type,
- unsigned int id, unsigned long frame,
- unsigned int nr_frames, xen_pfn_t mfn_list[]);
-
#endif /* __ASM_X86_MM_H__ */
diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index 636a125..667f9da 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -612,13 +612,4 @@ static inline void put_page_alloc_ref(struct page_info
*page)
}
}
-#ifndef CONFIG_ARCH_ACQUIRE_RESOURCE
-static inline int arch_acquire_resource(
- struct domain *d, unsigned int type, unsigned int id, unsigned long frame,
- unsigned int nr_frames, xen_pfn_t mfn_list[])
-{
- return -EOPNOTSUPP;
-}
-#endif /* !CONFIG_ARCH_ACQUIRE_RESOURCE */
-
#endif /* __XEN_MM_H__ */
--
2.7.4
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |