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BACKPORT: FROMLIST: iommu/io-pgtable-arm-v7s: Extend PA34 for MediaTek

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MediaTek extend the bit5 in lvl1 and lvl2 descriptor as PA34.

Bug: 167939345
Link: https://lore.kernel.org/patchwork/patch/1301120/
Change-Id: I6bd677285b73271f977f8bdeb4ef6b658b2ea81d
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Chao Hao <chao.hao@mediatek.com>
Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
This commit is contained in:
Chao Hao
2020-09-08 17:12:46 +08:00
committed by Todd Kjos
parent ba7883760a
commit 8b6f18592d
2 changed files with 9 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/iommu/io-pgtable-arm-v7s.c
View File

@@ -112,9 +112,10 @@
#define ARM_V7S_TEX_MASK 0x7
#define ARM_V7S_ATTR_TEX(val) (((val) & ARM_V7S_TEX_MASK) << ARM_V7S_TEX_SHIFT)
/* MediaTek extend the two bits for PA 32bit/33bit */
/* MediaTek extend the bits below for PA 32bit/33bit/34bit */
#define ARM_V7S_ATTR_MTK_PA_BIT32 BIT(9)
#define ARM_V7S_ATTR_MTK_PA_BIT33 BIT(4)
#define ARM_V7S_ATTR_MTK_PA_BIT34 BIT(5)
/* *well, except for TEX on level 2 large pages, of course :( */
#define ARM_V7S_CONT_PAGE_TEX_SHIFT 6
@@ -196,6 +197,8 @@ static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl,
pte |= ARM_V7S_ATTR_MTK_PA_BIT32;
if (paddr & BIT_ULL(33))
pte |= ARM_V7S_ATTR_MTK_PA_BIT33;
if (paddr & BIT_ULL(34))
pte |= ARM_V7S_ATTR_MTK_PA_BIT34;
return pte;
}
@@ -220,6 +223,8 @@ static phys_addr_t iopte_to_paddr(arm_v7s_iopte pte, int lvl,
paddr |= BIT_ULL(32);
if (pte & ARM_V7S_ATTR_MTK_PA_BIT33)
paddr |= BIT_ULL(33);
if (pte & ARM_V7S_ATTR_MTK_PA_BIT34)
paddr |= BIT_ULL(34);
return paddr;
}
@@ -756,7 +761,7 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
if (cfg->ias > ARM_V7S_ADDR_BITS)
return NULL;
if (cfg->oas > (arm_v7s_is_mtk_enabled(cfg) ? 34 : ARM_V7S_ADDR_BITS))
if (cfg->oas > (arm_v7s_is_mtk_enabled(cfg) ? 35 : ARM_V7S_ADDR_BITS))
return NULL;
if (cfg->quirks & ~(IO_PGTABLE_QUIRK_ARM_NS |

4
include/linux/io-pgtable.h
View File

@@ -92,8 +92,8 @@ struct io_pgtable_cfg {
* TLB maintenance when mapping as well as when unmapping.
*
* IO_PGTABLE_QUIRK_ARM_MTK_EXT: (ARM v7s format) MediaTek IOMMUs extend
* to support up to 34 bits PA where the bit32 and bit33 are
* encoded in the bit9 and bit4 of the PTE respectively.
* to support up to 35 bits PA where the bit32, bit33 and bit34 are
* encoded in the bit9, bit4 and bit5 of the PTE respectively.
*
* IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs
* on unmap, for DMA domains using the flush queue mechanism for