From: Julien Grall <julien.grall@arm.com>
To: xen-devel@lists.xenproject.org
Cc: Oleksandr_Tyshchenko@epam.com,
Julien Grall <julien.grall@arm.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Andrii Anisov <andrii_anisov@epam.com>
Subject: [Xen-devel] [PATCH MM-PART3 v2 05/12] xen/arm: mm: Introduce _PAGE_PRESENT and _PAGE_POPULATE
Date: Tue, 14 May 2019 13:31:18 +0100 [thread overview]
Message-ID: <20190514123125.29086-6-julien.grall@arm.com> (raw)
Message-ID: <20190514123118.JHVNyPrDwN_wLLIpesGLvtd-5uH9hiT-6BKkAaUZaDs@z> (raw)
In-Reply-To: <20190514123125.29086-1-julien.grall@arm.com>
At the moment, the flags are not enough to describe what kind of update
will done on the VA range. They need to be used in conjunction with the
enum xenmap_operation.
It would be more convenient to have all the information for the update
in a single place.
Two new flags are added to remove the relience on xenmap_operation:
- _PAGE_PRESENT: Indicate whether we are adding/removing the mapping
- _PAGE_POPULATE: Indicate whether we only populate page-tables
Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Andrii Anisov <andrii_anisov@epam.com>
---
Changes in v2:
- Add Andrii's reviewed-by
---
xen/arch/arm/mm.c | 2 +-
xen/include/asm-arm/page.h | 9 +++++++--
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 9de2a1150f..2192dede55 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -1083,7 +1083,7 @@ int map_pages_to_xen(unsigned long virt,
int populate_pt_range(unsigned long virt, unsigned long nr_mfns)
{
- return xen_pt_update(RESERVE, virt, INVALID_MFN, nr_mfns, 0);
+ return xen_pt_update(RESERVE, virt, INVALID_MFN, nr_mfns, _PAGE_POPULATE);
}
int destroy_xen_mappings(unsigned long v, unsigned long e)
diff --git a/xen/include/asm-arm/page.h b/xen/include/asm-arm/page.h
index 2bcdb0f1a5..caf2fac1ff 100644
--- a/xen/include/asm-arm/page.h
+++ b/xen/include/asm-arm/page.h
@@ -76,6 +76,8 @@
*
* [0:2] Memory Attribute Index
* [3:4] Permission flags
+ * [5] Present bit
+ * [6] Populate page table
*/
#define PAGE_AI_MASK(x) ((x) & 0x7U)
@@ -86,12 +88,15 @@
#define PAGE_XN_MASK(x) (((x) >> _PAGE_XN_BIT) & 0x1U)
#define PAGE_RO_MASK(x) (((x) >> _PAGE_RO_BIT) & 0x1U)
+#define _PAGE_PRESENT (1U << 5)
+#define _PAGE_POPULATE (1U << 6)
+
/*
* _PAGE_DEVICE and _PAGE_NORMAL are convenience defines. They are not
* meant to be used outside of this header.
*/
-#define _PAGE_DEVICE _PAGE_XN
-#define _PAGE_NORMAL MT_NORMAL
+#define _PAGE_DEVICE (_PAGE_XN|_PAGE_PRESENT)
+#define _PAGE_NORMAL (MT_NORMAL|_PAGE_PRESENT)
#define PAGE_HYPERVISOR_RO (_PAGE_NORMAL|_PAGE_RO|_PAGE_XN)
#define PAGE_HYPERVISOR_RX (_PAGE_NORMAL|_PAGE_RO)
--
2.11.0
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next prev parent reply other threads:[~2019-05-14 12:31 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-14 12:31 [PATCH MM-PART3 v2 00/12] xen/arm: Provide a generic function to update Xen PT Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-05-14 12:31 ` [PATCH MM-PART3 v2 01/12] xen/arm: lpae: Add a macro to generate offsets from an address Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-11 18:21 ` Stefano Stabellini
2019-06-11 18:27 ` Julien Grall
2019-05-14 12:31 ` [PATCH MM-PART3 v2 02/12] xen/arm: mm: Rename create_xen_entries() to xen_pt_update() Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-11 18:23 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 03/12] xen/arm: mm: Move out of xen_pt_update() the logic to update an entry Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-11 18:29 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 04/12] xen/arm: mm: Only increment mfn when valid in xen_pt_update Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-11 18:37 ` Stefano Stabellini
2019-06-11 19:56 ` [Xen-devel] Checking INVALID_MFN in mfn_add (WAS: Re: [PATCH MM-PART3 v2 04/12] xen/arm: mm: Only increment mfn when valid in xen_pt_update) Julien Grall
2019-06-11 20:24 ` Andrew Cooper
2019-06-12 12:47 ` Julien Grall
2019-06-12 15:57 ` Stefano Stabellini
2019-06-12 7:53 ` Jan Beulich
2019-05-14 12:31 ` Julien Grall [this message]
2019-05-14 12:31 ` [Xen-devel] [PATCH MM-PART3 v2 05/12] xen/arm: mm: Introduce _PAGE_PRESENT and _PAGE_POPULATE Julien Grall
2019-06-11 22:35 ` Stefano Stabellini
2019-06-12 13:00 ` Julien Grall
2019-05-14 12:31 ` [PATCH MM-PART3 v2 06/12] xen/arm: mm: Sanity check any update of Xen page tables Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-12 0:10 ` Stefano Stabellini
2019-06-12 14:48 ` Julien Grall
2019-06-12 15:54 ` Stefano Stabellini
2019-06-12 15:58 ` Julien Grall
2019-05-14 12:31 ` [PATCH MM-PART3 v2 07/12] xen/arm: mm: Rework xen_pt_update_entry to avoid use xenmap_operation Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-12 22:22 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 08/12] xen/arm: mm: Remove enum xenmap_operation Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-11 22:38 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 09/12] xen/arm: mm: Use {, un}map_domain_page() to map/unmap Xen page-tables Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-12 22:25 ` Stefano Stabellini
2019-06-13 8:07 ` Julien Grall
2019-06-13 17:55 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 10/12] xen/arm: mm: Rework Xen page-tables walk during update Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-12 22:52 ` Stefano Stabellini
2019-06-13 8:20 ` Julien Grall
2019-06-13 17:59 ` Stefano Stabellini
2019-06-13 21:32 ` Julien Grall
2019-06-13 22:57 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 11/12] xen/arm: mm: Don't open-code Xen PT update in {set, clear}_fixmap() Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-12 22:33 ` Stefano Stabellini
2019-06-13 8:31 ` Julien Grall
2019-06-13 18:51 ` Stefano Stabellini
2019-06-13 21:21 ` Julien Grall
2019-06-13 22:55 ` Stefano Stabellini
2019-05-14 12:31 ` [PATCH MM-PART3 v2 12/12] xen/arm: mm: Remove set_pte_flags_on_range() Julien Grall
2019-05-14 12:31 ` [Xen-devel] " Julien Grall
2019-06-12 22:41 ` Stefano Stabellini
2019-06-13 8:51 ` Julien Grall
2019-06-13 18:04 ` Stefano Stabellini
2019-06-13 21:22 ` Julien Grall
2019-05-29 17:23 ` [PATCH MM-PART3 v2 00/12] xen/arm: Provide a generic function to update Xen PT Julien Grall
2019-05-29 17:23 ` [Xen-devel] " Julien Grall
2019-06-10 10:08 ` Julien Grall
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