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Message-Id: <20240827-patches-below_hint_mmap-v1-3-46ff2eb9022d@rivosinc.com>
Date: Tue, 27 Aug 2024 22:49:09 -0700
From: Charlie Jenkins <charlie@...osinc.com>
To: Arnd Bergmann <arnd@...db.de>, Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Naveen N Rao <naveen@...nel.org>, Muchun Song <muchun.song@...ux.dev>,
Andrew Morton <akpm@...ux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@...cle.com>,
Vlastimil Babka <vbabka@...e.cz>,
Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
Huacai Chen <chenhuacai@...nel.org>, WANG Xuerui <kernel@...0n.name>,
Russell King <linux@...linux.org.uk>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
Helge Deller <deller@....de>, Alexander Gordeev <agordeev@...ux.ibm.com>,
Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Yoshinori Sato <ysato@...rs.sourceforge.jp>, Rich Felker <dalias@...c.org>,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
"David S. Miller" <davem@...emloft.net>,
Andreas Larsson <andreas@...sler.com>, Shuah Khan <shuah@...nel.org>,
Alexandre Ghiti <alexghiti@...osinc.com>
Cc: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
Palmer Dabbelt <palmer@...osinc.com>, linux-riscv@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
linux-mm@...ck.org, loongarch@...ts.linux.dev, linux-mips@...r.kernel.org,
linux-parisc@...r.kernel.org, linux-s390@...r.kernel.org,
linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
linux-kselftest@...r.kernel.org, Charlie Jenkins <charlie@...osinc.com>
Subject: [PATCH 03/16] mm: Add flag and len param to arch_get_mmap_base()
The flag and len param is required in arch_get_mmap_base() to implement
MAP_BELOW_HINT.
Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
---
arch/arm64/include/asm/processor.h | 2 +-
arch/powerpc/include/asm/task_size_64.h | 2 +-
arch/riscv/include/asm/processor.h | 2 +-
fs/hugetlbfs/inode.c | 2 +-
include/linux/sched/mm.h | 2 +-
mm/mmap.c | 2 +-
6 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index f77371232d8c..a67ca119bb91 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -95,7 +95,7 @@
#define arch_get_mmap_end(addr, len, flags) \
(((addr) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : DEFAULT_MAP_WINDOW)
-#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \
+#define arch_get_mmap_base(addr, len, base, flags) ((addr > DEFAULT_MAP_WINDOW) ? \
base + TASK_SIZE - DEFAULT_MAP_WINDOW :\
base)
#endif /* CONFIG_ARM64_FORCE_52BIT */
diff --git a/arch/powerpc/include/asm/task_size_64.h b/arch/powerpc/include/asm/task_size_64.h
index 5a709951c901..239b363841aa 100644
--- a/arch/powerpc/include/asm/task_size_64.h
+++ b/arch/powerpc/include/asm/task_size_64.h
@@ -72,7 +72,7 @@
#define STACK_TOP_MAX TASK_SIZE_USER64
#define STACK_TOP (is_32bit_task() ? STACK_TOP_USER32 : STACK_TOP_USER64)
-#define arch_get_mmap_base(addr, base) \
+#define arch_get_mmap_base(addr, len, base, flags) \
(((addr) > DEFAULT_MAP_WINDOW) ? (base) + TASK_SIZE - DEFAULT_MAP_WINDOW : (base))
#define arch_get_mmap_end(addr, len, flags) \
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 1015f2a49917..7ff559bf46f2 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -19,7 +19,7 @@
STACK_TOP_MAX; \
})
-#define arch_get_mmap_base(addr, base, flags) \
+#define arch_get_mmap_base(addr, len, base, flags) \
({ \
base; \
})
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 9f6cff356796..05a52f85dba9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -195,7 +195,7 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr,
info.flags = VM_UNMAPPED_AREA_TOPDOWN;
info.length = len;
info.low_limit = PAGE_SIZE;
- info.high_limit = arch_get_mmap_base(addr, current->mm->mmap_base);
+ info.high_limit = arch_get_mmap_base(addr, len, current->mm->mmap_base, flags);
info.align_mask = PAGE_MASK & ~huge_page_mask(h);
addr = vm_unmapped_area(&info);
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index 91546493c43d..265b43855d0b 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -174,7 +174,7 @@ static inline void mm_update_next_owner(struct mm_struct *mm)
#endif
#ifndef arch_get_mmap_base
-#define arch_get_mmap_base(addr, base) (base)
+#define arch_get_mmap_base(addr, len, base, flags) (base)
#endif
extern void arch_pick_mmap_layout(struct mm_struct *mm,
diff --git a/mm/mmap.c b/mm/mmap.c
index d0dfc85b209b..27a7f2be3f68 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1861,7 +1861,7 @@ generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
info.flags = VM_UNMAPPED_AREA_TOPDOWN;
info.length = len;
info.low_limit = PAGE_SIZE;
- info.high_limit = arch_get_mmap_base(addr, mm->mmap_base);
+ info.high_limit = arch_get_mmap_base(addr, len, mm->mmap_base, flags);
addr = vm_unmapped_area(&info);
/*
--
2.45.0
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