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From: Julien Grall <julien.grall@arm.com>
To: xen-devel@lists.xen.org
Cc: proskurin@sec.in.tum.de, Julien Grall <julien.grall@arm.com>,
	sstabellini@kernel.org, steve.capper@arm.com,
	wei.chen@linaro.org
Subject: [for-4.8][PATCH v2 09/23] xen/arm: p2m: Change the type of level_shifts from paddr_t to uint8_t
Date: Thu, 15 Sep 2016 12:28:25 +0100	[thread overview]
Message-ID: <1473938919-31976-10-git-send-email-julien.grall@arm.com> (raw)
In-Reply-To: <1473938919-31976-1-git-send-email-julien.grall@arm.com>

The level shift can be encoded with 8-bit. So it is not necessary to
use paddr_t (i.e 64-bit).

Signed-off-by: Julien Grall <julien.grall@arm.com>

---
    Changes in v2:
        - Use uint8_t rather than unsigned int
        - Replaced paddr_t by uint8_t in p2m_shatter_page
---
 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 b53d4cf..b4f75e8 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -687,14 +687,14 @@ static const paddr_t level_sizes[] =
     { ZEROETH_SIZE, FIRST_SIZE, SECOND_SIZE, THIRD_SIZE };
 static const paddr_t level_masks[] =
     { ZEROETH_MASK, FIRST_MASK, SECOND_MASK, THIRD_MASK };
-static const paddr_t level_shifts[] =
+static const uint8_t level_shifts[] =
     { ZEROETH_SHIFT, FIRST_SHIFT, SECOND_SHIFT, THIRD_SHIFT };
 
 static int p2m_shatter_page(struct p2m_domain *p2m,
                             lpae_t *entry,
                             unsigned int level)
 {
-    const paddr_t level_shift = level_shifts[level];
+    const uint8_t level_shift = level_shifts[level];
     int rc = p2m_create_table(p2m, entry, level_shift - PAGE_SHIFT);
 
     if ( !rc )
-- 
1.9.1


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  parent reply	other threads:[~2016-09-15 11:28 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-15 11:28 [for-4.8][PATCH v2 00/23] xen/arm: Rework the P2M code to follow break-before-make sequence Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 01/23] xen/arm: do_trap_instr_abort_guest: Move the IPA computation out of the switch Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 02/23] xen/arm: p2m: Store in p2m_domain whether we need to clean the entry Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 03/23] xen/arm: p2m: Rename parameter in p2m_{remove, write}_pte Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 04/23] xen/arm: p2m: Use typesafe gfn in p2m_mem_access_radix_set Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 05/23] xen/arm: p2m: Add a back pointer to domain in p2m_domain Julien Grall
2016-09-17  1:16   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 06/23] xen/arm: traps: Move MMIO emulation code in a separate helper Julien Grall
2016-09-17  1:17   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 07/23] xen/arm: traps: Check the P2M before injecting a data/instruction abort Julien Grall
2016-09-17  1:22   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 08/23] xen/arm: p2m: Invalidate the TLBs when write unlocking the p2m Julien Grall
2016-09-15 11:28 ` Julien Grall [this message]
2016-09-17  1:23   ` [for-4.8][PATCH v2 09/23] xen/arm: p2m: Change the type of level_shifts from paddr_t to uint8_t Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 10/23] xen/arm: p2m: Move the lookup helpers at the top of the file Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 11/23] xen/arm: p2m: Introduce p2m_get_root_pointer and use it in __p2m_lookup Julien Grall
2016-09-17  1:26   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 12/23] xen/arm: p2m: Introduce p2m_get_entry and use it to implement __p2m_lookup Julien Grall
2016-09-17  1:36   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 13/23] xen/arm: p2m: Replace all usage of __p2m_lookup with p2m_get_entry Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 14/23] xen/arm: p2m: Re-implement p2m_cache_flush using p2m_get_entry Julien Grall
2016-09-17  1:42   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 15/23] xen/arm: p2m: Make p2m_{valid, table, mapping} helpers inline Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 16/23] xen/arm: p2m: Introduce a helper to check if an entry is a superpage Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 17/23] xen/arm: p2m: Introduce p2m_set_entry and __p2m_set_entry Julien Grall
2016-09-22  2:18   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 18/23] xen/arm: p2m: Re-implement relinquish_p2m_mapping using p2m_{get, set}_entry Julien Grall
2016-09-20  2:14   ` Stefano Stabellini
2016-09-15 11:28 ` [for-4.8][PATCH v2 19/23] xen/arm: p2m: Re-implement p2m_remove_using using p2m_set_entry Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 20/23] xen/arm: p2m: Re-implement p2m_insert_mapping " Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 21/23] xen/arm: p2m: Re-implement p2m_set_mem_access using p2m_{set, get}_entry Julien Grall
2016-09-15 11:41   ` Razvan Cojocaru
2016-09-15 11:28 ` [for-4.8][PATCH v2 22/23] xen/arm: p2m: Do not handle shattering in p2m_create_table Julien Grall
2016-09-15 13:50   ` Julien Grall
2016-09-15 11:28 ` [for-4.8][PATCH v2 23/23] xen/arm: p2m: Export p2m_*_lock helpers Julien Grall
2016-09-15 17:23 ` [for-4.8][PATCH v2 00/23] xen/arm: Rework the P2M code to follow break-before-make sequence Tamas K Lengyel
2016-09-28  1:14 ` Stefano Stabellini

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