From: Julien Grall <julien.grall@arm.com>
To: xen-devel@lists.xen.org
Cc: Julien Grall <julien.grall@arm.com>,
sstabellini@kernel.org, Shannon Zhao <shannon.zhao@linaro.org>,
wei.chen@linaro.org
Subject: [PATCH v4 09/16] xen/arm: map_regions_rw_cache: Map the region with p2m->default_access
Date: Mon, 27 Jun 2016 17:54:05 +0100 [thread overview]
Message-ID: <1467046452-1261-10-git-send-email-julien.grall@arm.com> (raw)
In-Reply-To: <1467046452-1261-1-git-send-email-julien.grall@arm.com>
The parameter 'access' is used by memaccess to restrict temporarily the
permission. This parameter should not be used for other purpose (such
as restricting permanently the permission).
The type p2m_mmio_direct will map the region Read-Write and
non-executable. Note that this is already the current behavior with the
combination of the type and the access. So there is no functional
change.
Signed-off-by: Julien Grall <julien.grall@arm.com>
---
Cc: Shannon Zhao <shannon.zhao@linaro.org>
This patch is a candidate for Xen 4.7. Currently this function is
only used to map ACPI regions.
I am wondering if we should introduce a new p2m type for it. And map
this region RO (I am not sure why a guest would want to
modify this region).
Changes in v4:
- Patch added
---
xen/arch/arm/p2m.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 1a10019..4f3564f 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1231,7 +1231,7 @@ int map_regions_rw_cache(struct domain *d,
pfn_to_paddr(start_gfn + nr),
pfn_to_paddr(mfn),
MATTR_MEM, 0, p2m_mmio_direct,
- p2m_access_rw);
+ d->arch.p2m.default_access);
}
int unmap_regions_rw_cache(struct domain *d,
@@ -1244,7 +1244,7 @@ int unmap_regions_rw_cache(struct domain *d,
pfn_to_paddr(start_gfn + nr),
pfn_to_paddr(mfn),
MATTR_MEM, 0, p2m_invalid,
- p2m_access_rw);
+ d->arch.p2m.default_access);
}
int map_mmio_regions(struct domain *d,
--
1.9.1
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next prev parent reply other threads:[~2016-06-27 16:54 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-27 16:53 [PATCH v4 00/16] xen/arm: Use the typesafes gfn and mfn Julien Grall
2016-06-27 16:53 ` [PATCH v4 01/16] xen: Use typesafe gfn/mfn in guest_physmap_* helpers Julien Grall
2016-06-27 16:53 ` [PATCH v4 02/16] xen: Use typesafe gfn in xenmem_add_to_physmap_one Julien Grall
2016-06-27 16:53 ` [PATCH v4 03/16] xen/arm: Rename grant_table_gfpn into grant_table_gfn and use the typesafe gfn Julien Grall
2016-06-27 16:54 ` [PATCH v4 04/16] xen: Use the typesafe mfn and gfn in map_mmio_regions Julien Grall
2016-06-27 16:54 ` [PATCH v4 05/16] xen/mm: Introduce INVALID_GFN_T and INVALID_MFN_T Julien Grall
2016-06-28 7:16 ` Jan Beulich
2016-06-28 7:29 ` Andrew Cooper
2016-06-28 7:54 ` Jan Beulich
2016-06-27 16:54 ` [PATCH v4 06/16] xen/arm: Rework the interface of p2m_lookup and use typesafe gfn and mfn Julien Grall
2016-06-27 16:54 ` [PATCH v4 07/16] xen/arm: Rework the interface of p2m_cache_flush and use typesafe gfn Julien Grall
2016-06-27 16:54 ` [PATCH v4 08/16] xen: Replace _mfn(INVALID_MFN) with MFN_INVALID_T Julien Grall
2016-06-28 7:19 ` Jan Beulich
2016-06-28 12:18 ` Julien Grall
2016-06-27 16:54 ` Julien Grall [this message]
2016-06-27 16:54 ` [PATCH v4 10/16] xen/arm: dom0_build: Remove dead code in allocate_memory Julien Grall
2016-06-27 16:54 ` [PATCH v4 11/16] xen/arm: p2m: Remove unused operation ALLOCATE Julien Grall
2016-06-27 16:54 ` [PATCH v4 12/16] xen/arm: Use the typesafes mfn and gfn in map_dev_mmio_region Julien Grall
2016-06-27 16:54 ` [PATCH v4 13/16] xen/arm: Use the typesafes mfn and gfn in map_regions_rw_cache Julien Grall
2016-06-27 16:54 ` [PATCH v4 14/16] xen/arm: p2m: Introduce helpers to insert and remove mapping Julien Grall
2016-06-27 16:54 ` [PATCH v4 15/16] xen/arm: p2m: Use typesafe gfn for {max, lowest}_mapped_gfn Julien Grall
2016-06-27 16:54 ` [PATCH v4 16/16] xen/arm: p2m: Rework the interface of apply_p2m_changes and use typesafe Julien Grall
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