* [PATCH AUTOSEL 6.1 13/15] LoongArch: Let pmd_present() return true when splitting pmd
[not found] <20230829133245.520176-1-sashal@kernel.org>
@ 2023-08-29 13:32 ` Sasha Levin
2023-08-29 13:32 ` [PATCH AUTOSEL 6.1 14/15] LoongArch: Fix the write_fcsr() macro Sasha Levin
1 sibling, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2023-08-29 13:32 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Hongchen Zhang, Huacai Chen, Sasha Levin, chenhuacai, akpm,
yuzhao, jgross, guoren, zhengqi.arch, loongarch
From: Hongchen Zhang <zhanghongchen@loongson.cn>
[ Upstream commit ddc1729b07cc84bb29f577698b8d2e74a4004a6e ]
When we split a pmd into ptes, pmd_present() and pmd_trans_huge() should
return true, otherwise it would be treated as a swap pmd.
This is the same as arm64 does in commit b65399f6111b ("arm64/mm: Change
THP helpers to comply with generic MM semantics"), we also add a new bit
named _PAGE_PRESENT_INVALID for LoongArch.
Signed-off-by: Hongchen Zhang <zhanghongchen@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/loongarch/include/asm/pgtable-bits.h | 2 ++
arch/loongarch/include/asm/pgtable.h | 3 ++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/loongarch/include/asm/pgtable-bits.h b/arch/loongarch/include/asm/pgtable-bits.h
index 3d1e0a69975a5..5f2ebcea509cd 100644
--- a/arch/loongarch/include/asm/pgtable-bits.h
+++ b/arch/loongarch/include/asm/pgtable-bits.h
@@ -21,12 +21,14 @@
#define _PAGE_HGLOBAL_SHIFT 12 /* HGlobal is a PMD bit */
#define _PAGE_PFN_SHIFT 12
#define _PAGE_PFN_END_SHIFT 48
+#define _PAGE_PRESENT_INVALID_SHIFT 60
#define _PAGE_NO_READ_SHIFT 61
#define _PAGE_NO_EXEC_SHIFT 62
#define _PAGE_RPLV_SHIFT 63
/* Used by software */
#define _PAGE_PRESENT (_ULCAST_(1) << _PAGE_PRESENT_SHIFT)
+#define _PAGE_PRESENT_INVALID (_ULCAST_(1) << _PAGE_PRESENT_INVALID_SHIFT)
#define _PAGE_WRITE (_ULCAST_(1) << _PAGE_WRITE_SHIFT)
#define _PAGE_ACCESSED (_ULCAST_(1) << _PAGE_ACCESSED_SHIFT)
#define _PAGE_MODIFIED (_ULCAST_(1) << _PAGE_MODIFIED_SHIFT)
diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index 79d5bfd913e0f..e748fad82f13e 100644
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -208,7 +208,7 @@ static inline int pmd_bad(pmd_t pmd)
static inline int pmd_present(pmd_t pmd)
{
if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
- return !!(pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE));
+ return !!(pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PRESENT_INVALID));
return pmd_val(pmd) != (unsigned long)invalid_pte_table;
}
@@ -525,6 +525,7 @@ static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
static inline pmd_t pmd_mkinvalid(pmd_t pmd)
{
+ pmd_val(pmd) |= _PAGE_PRESENT_INVALID;
pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY | _PAGE_PROTNONE);
return pmd;
--
2.40.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH AUTOSEL 6.1 14/15] LoongArch: Fix the write_fcsr() macro
[not found] <20230829133245.520176-1-sashal@kernel.org>
2023-08-29 13:32 ` [PATCH AUTOSEL 6.1 13/15] LoongArch: Let pmd_present() return true when splitting pmd Sasha Levin
@ 2023-08-29 13:32 ` Sasha Levin
1 sibling, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2023-08-29 13:32 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Qi Hu, Miao HAO, Huacai Chen, Sasha Levin, chenhuacai, gregkh,
loongarch
From: Qi Hu <huqi@loongson.cn>
[ Upstream commit 346dc929623cef70ff7832a4fa0ffd1b696e312a ]
The "write_fcsr()" macro uses wrong the positions for val and dest in
asm. Fix it!
Reported-by: Miao HAO <haomiao19@mails.ucas.ac.cn>
Signed-off-by: Qi Hu <huqi@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/loongarch/include/asm/loongarch.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
index 62835d84a647d..3d15fa5bef37d 100644
--- a/arch/loongarch/include/asm/loongarch.h
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -1488,7 +1488,7 @@ __BUILD_CSR_OP(tlbidx)
#define write_fcsr(dest, val) \
do { \
__asm__ __volatile__( \
- " movgr2fcsr %0, "__stringify(dest)" \n" \
+ " movgr2fcsr "__stringify(dest)", %0 \n" \
: : "r" (val)); \
} while (0)
--
2.40.1
^ permalink raw reply related [flat|nested] 3+ messages in thread