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From: Sergej Proskurin <proskurin@sec.in.tum.de>
To: xen-devel@lists.xenproject.org
Cc: Sergej Proskurin <proskurin@sec.in.tum.de>,
	Julien Grall <julien.grall@arm.com>,
	Stefano Stabellini <sstabellini@kernel.org>
Subject: [PATCH v2 09/25] arm/altp2m: Add altp2m table flushing routine.
Date: Mon,  1 Aug 2016 19:10:12 +0200	[thread overview]
Message-ID: <20160801171028.11615-10-proskurin@sec.in.tum.de> (raw)
In-Reply-To: <20160801171028.11615-1-proskurin@sec.in.tum.de>

The current implementation differentiates between flushing and
destroying altp2m views. This commit adds the function altp2m_flush,
which allows to flush all or individual altp2m views without destroying
the entire table. In this way, altp2m views can be reused at a later
point in time.

Signed-off-by: Sergej Proskurin <proskurin@sec.in.tum.de>
---
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Julien Grall <julien.grall@arm.com>
---
v2: Pages in p2m->pages are not cleared in p2m_flush_table anymore.
    VMID is freed in p2m_free_one.
    Cosmetic fixes.
---
 xen/arch/arm/altp2m.c        | 38 ++++++++++++++++++++++++++++++++++++++
 xen/include/asm-arm/altp2m.h |  5 +----
 xen/include/asm-arm/p2m.h    |  3 +++
 3 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/altp2m.c b/xen/arch/arm/altp2m.c
index 767f233..e73424c 100644
--- a/xen/arch/arm/altp2m.c
+++ b/xen/arch/arm/altp2m.c
@@ -151,6 +151,44 @@ int altp2m_init(struct domain *d)
     return 0;
 }
 
+void altp2m_flush(struct domain *d)
+{
+    unsigned int i;
+    struct p2m_domain *p2m;
+
+    /*
+     * If altp2m is active, we are not allowed to flush altp2m[0]. This special
+     * view is considered as the hostp2m as long as altp2m is active.
+     */
+    ASSERT(!altp2m_active(d));
+
+    altp2m_lock(d);
+
+    for ( i = 0; i < MAX_ALTP2M; i++ )
+    {
+        if ( d->arch.altp2m_vttbr[i] == INVALID_VTTBR )
+            continue;
+
+        p2m = d->arch.altp2m_p2m[i];
+
+        read_lock(&p2m->lock);
+
+        p2m_flush_table(p2m);
+
+        /*
+         * Reset VTTBR.
+         *
+         * Note that VMID is not freed so that it can be reused later.
+         */
+        p2m->vttbr.vttbr = INVALID_VTTBR;
+        d->arch.altp2m_vttbr[i] = INVALID_VTTBR;
+
+        read_unlock(&p2m->lock);
+    }
+
+    altp2m_unlock(d);
+}
+
 void altp2m_teardown(struct domain *d)
 {
     unsigned int i;
diff --git a/xen/include/asm-arm/altp2m.h b/xen/include/asm-arm/altp2m.h
index a33c740..3ba82a8 100644
--- a/xen/include/asm-arm/altp2m.h
+++ b/xen/include/asm-arm/altp2m.h
@@ -54,9 +54,6 @@ int altp2m_init_by_id(struct domain *d,
                       unsigned int idx);
 
 /* Flush all the alternate p2m's for a domain */
-static inline void altp2m_flush(struct domain *d)
-{
-    /* Not yet implemented. */
-}
+void altp2m_flush(struct domain *d);
 
 #endif /* __ASM_ARM_ALTP2M_H */
diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index f13f285..32326cb 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -222,6 +222,9 @@ mfn_t gfn_to_mfn(struct domain *d, gfn_t gfn);
 /* Allocates page table for a p2m. */
 int p2m_alloc_table(struct p2m_domain *p2m);
 
+/* Flushes the page table held by the p2m. */
+void p2m_flush_table(struct p2m_domain *p2m);
+
 /* Initialize the p2m structure. */
 int p2m_init_one(struct domain *d, struct p2m_domain *p2m);
 
-- 
2.9.0


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  parent reply	other threads:[~2016-08-01 17:11 UTC|newest]

Thread overview: 159+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-01 17:10 [PATCH v2 00/25] arm/altp2m: Introducing altp2m to ARM Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 01/25] arm/altp2m: Add first altp2m HVMOP stubs Sergej Proskurin
2016-08-03 16:54   ` Julien Grall
2016-08-04 16:01     ` Sergej Proskurin
2016-08-04 16:04       ` Julien Grall
2016-08-04 16:22         ` Sergej Proskurin
2016-08-04 16:51           ` Julien Grall
2016-08-05  6:55             ` Sergej Proskurin
2016-08-09 19:16     ` Tamas K Lengyel
2016-08-10  9:52       ` Julien Grall
2016-08-10 14:49         ` Tamas K Lengyel
2016-08-11  8:17           ` Julien Grall
2016-08-11 14:41             ` Tamas K Lengyel
2016-08-12  8:10               ` Julien Grall
2016-08-01 17:10 ` [PATCH v2 02/25] arm/altp2m: Add HVMOP_altp2m_get_domain_state Sergej Proskurin
2016-08-01 17:21   ` Andrew Cooper
2016-08-01 17:34     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 03/25] arm/altp2m: Add struct vttbr Sergej Proskurin
2016-08-03 17:04   ` Julien Grall
2016-08-03 17:05     ` Julien Grall
2016-08-04 16:11       ` Sergej Proskurin
2016-08-04 16:15         ` Julien Grall
2016-08-06  8:54           ` Sergej Proskurin
2016-08-06 13:20             ` Julien Grall
2016-08-06 13:48               ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 04/25] arm/altp2m: Move hostp2m init/teardown to individual functions Sergej Proskurin
2016-08-03 17:40   ` Julien Grall
2016-08-05  7:26     ` Sergej Proskurin
2016-08-05  9:16       ` Julien Grall
2016-08-06  8:43         ` Sergej Proskurin
2016-08-06 13:26           ` Julien Grall
2016-08-06 13:50             ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 05/25] arm/altp2m: Rename and extend p2m_alloc_table Sergej Proskurin
2016-08-03 17:57   ` Julien Grall
2016-08-06  8:57     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 06/25] arm/altp2m: Cosmetic fixes - function prototypes Sergej Proskurin
2016-08-03 18:02   ` Julien Grall
2016-08-06  9:00     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 07/25] arm/altp2m: Add altp2m init/teardown routines Sergej Proskurin
2016-08-03 18:12   ` Julien Grall
2016-08-05  6:53     ` Sergej Proskurin
2016-08-05  9:20       ` Julien Grall
2016-08-06  8:30         ` Sergej Proskurin
2016-08-09  9:44       ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 08/25] arm/altp2m: Add HVMOP_altp2m_set_domain_state Sergej Proskurin
2016-08-03 18:41   ` Julien Grall
2016-08-06  9:03     ` Sergej Proskurin
2016-08-06  9:36     ` Sergej Proskurin
2016-08-06 14:18       ` Julien Grall
2016-08-06 14:21       ` Julien Grall
2016-08-11  9:08       ` Julien Grall
2016-08-01 17:10 ` Sergej Proskurin [this message]
2016-08-03 18:44   ` [PATCH v2 09/25] arm/altp2m: Add altp2m table flushing routine Julien Grall
2016-08-06  9:45     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 10/25] arm/altp2m: Add HVMOP_altp2m_create_p2m Sergej Proskurin
2016-08-03 18:48   ` Julien Grall
2016-08-06  9:46     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 11/25] arm/altp2m: Add HVMOP_altp2m_destroy_p2m Sergej Proskurin
2016-08-04 11:46   ` Julien Grall
2016-08-06  9:54     ` Sergej Proskurin
2016-08-06 13:36       ` Julien Grall
2016-08-06 13:51         ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 12/25] arm/altp2m: Add HVMOP_altp2m_switch_p2m Sergej Proskurin
2016-08-04 11:51   ` Julien Grall
2016-08-06 10:13     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 13/25] arm/altp2m: Make p2m_restore_state ready for altp2m Sergej Proskurin
2016-08-04 11:55   ` Julien Grall
2016-08-06 10:20     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 14/25] arm/altp2m: Make get_page_from_gva " Sergej Proskurin
2016-08-04 11:59   ` Julien Grall
2016-08-06 10:38     ` Sergej Proskurin
2016-08-06 13:45       ` Julien Grall
2016-08-06 16:58         ` Sergej Proskurin
2016-08-11  8:33           ` Julien Grall
2016-08-01 17:10 ` [PATCH v2 15/25] arm/altp2m: Extend __p2m_lookup Sergej Proskurin
2016-08-04 12:04   ` Julien Grall
2016-08-06 10:44     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 16/25] arm/altp2m: Make p2m_mem_access_check ready for altp2m Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 17/25] arm/altp2m: Cosmetic fixes - function prototypes Sergej Proskurin
2016-08-04 12:06   ` Julien Grall
2016-08-06 10:46     ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 18/25] arm/altp2m: Add HVMOP_altp2m_set_mem_access Sergej Proskurin
2016-08-04 14:19   ` Julien Grall
2016-08-06 11:03     ` Sergej Proskurin
2016-08-06 14:26       ` Julien Grall
2016-08-01 17:10 ` [PATCH v2 19/25] arm/altp2m: Add altp2m_propagate_change Sergej Proskurin
2016-08-04 14:50   ` Julien Grall
2016-08-06 11:26     ` Sergej Proskurin
2016-08-06 13:52       ` Julien Grall
2016-08-06 17:06         ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 20/25] arm/altp2m: Add altp2m paging mechanism Sergej Proskurin
2016-08-04 13:50   ` Julien Grall
2016-08-06 12:51     ` Sergej Proskurin
2016-08-06 14:14       ` Julien Grall
2016-08-06 17:28         ` Sergej Proskurin
2016-08-04 16:59   ` Julien Grall
2016-08-06 12:57     ` Sergej Proskurin
2016-08-06 14:21       ` Julien Grall
2016-08-06 17:35         ` Sergej Proskurin
2016-08-10  9:32         ` Sergej Proskurin
2016-08-11  8:47           ` Julien Grall
2016-08-11 17:13             ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 21/25] arm/altp2m: Add HVMOP_altp2m_change_gfn Sergej Proskurin
2016-08-04 14:04   ` Julien Grall
2016-08-06 13:45     ` Sergej Proskurin
2016-08-06 14:34       ` Julien Grall
2016-08-06 17:42         ` Sergej Proskurin
2016-08-11  9:21           ` Julien Grall
2016-08-01 17:10 ` [PATCH v2 22/25] arm/altp2m: Adjust debug information to altp2m Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 23/25] arm/altp2m: Extend libxl to activate altp2m on ARM Sergej Proskurin
2016-08-02 11:59   ` Wei Liu
2016-08-02 14:07     ` Sergej Proskurin
2016-08-11 16:00       ` Wei Liu
2016-08-15 16:07         ` Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 24/25] arm/altp2m: Extend xen-access for " Sergej Proskurin
2016-08-01 17:10 ` [PATCH v2 25/25] arm/altp2m: Add test of xc_altp2m_change_gfn Sergej Proskurin
2016-08-02  9:14   ` Razvan Cojocaru
2016-08-02  9:50     ` Sergej Proskurin
2016-08-01 18:15 ` [PATCH v2 00/25] arm/altp2m: Introducing altp2m to ARM Julien Grall
2016-08-01 19:20   ` Tamas K Lengyel
2016-08-01 19:55     ` Julien Grall
2016-08-01 20:35       ` Sergej Proskurin
2016-08-01 20:41       ` Tamas K Lengyel
2016-08-02  7:38         ` Julien Grall
2016-08-02 11:17           ` George Dunlap
2016-08-02 15:48             ` Tamas K Lengyel
2016-08-02 16:05               ` George Dunlap
2016-08-02 16:09                 ` Tamas K Lengyel
2016-08-02 16:40                 ` Julien Grall
2016-08-02 17:01                   ` Tamas K Lengyel
2016-08-02 17:22                   ` Tamas K Lengyel
2016-08-02 16:00           ` Tamas K Lengyel
2016-08-02 16:11             ` Julien Grall
2016-08-02 16:22               ` Tamas K Lengyel
2016-08-01 23:14   ` Andrew Cooper
2016-08-02  7:34     ` Julien Grall
2016-08-02 16:08       ` Andrew Cooper
2016-08-02 16:30         ` Tamas K Lengyel
2016-08-03 11:53         ` Julien Grall
2016-08-03 12:00           ` Andrew Cooper
2016-08-03 12:13             ` Julien Grall
2016-08-03 12:18               ` Andrew Cooper
2016-08-03 12:45                 ` Sergej Proskurin
2016-08-03 14:08                   ` Julien Grall
2016-08-03 14:17                     ` Sergej Proskurin
2016-08-03 16:01                     ` Tamas K Lengyel
2016-08-03 16:24                       ` Julien Grall
2016-08-03 16:42                         ` Tamas K Lengyel
2016-08-03 16:51                           ` Julien Grall
2016-08-03 17:30                             ` Andrew Cooper
2016-08-03 17:43                               ` Tamas K Lengyel
2016-08-03 17:45                                 ` Julien Grall
2016-08-03 17:51                                   ` Tamas K Lengyel
2016-08-03 17:56                                     ` Julien Grall
2016-08-03 18:11                                       ` Tamas K Lengyel
2016-08-03 18:16                                         ` Julien Grall
2016-08-03 18:21                                           ` Tamas K Lengyel
2016-08-04 11:13                                             ` George Dunlap
2016-08-08  4:44                                               ` Tamas K Lengyel

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