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authorLinus Torvalds <torvalds@linux-foundation.org>2024-01-17 20:34:45 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2024-01-17 20:34:45 +0100
commitc4c6044d35f06a93115e691e79436839962c203e (patch)
tree6583b20b97652b22349b52f3a2ee682abe47d245 /arch/arm
parentMerge tag 'microblaze-v6.8' of git://git.monstr.eu/linux-2.6-microblaze (diff)
parentMerge branches 'misc' and 'fixes' into for-next (diff)
downloadlinux-c4c6044d35f06a93115e691e79436839962c203e.tar.xz
linux-c4c6044d35f06a93115e691e79436839962c203e.zip
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King: - add missing neon instructions for the neon support hook - arrange for davinci to select PINCTRL - try VMA lock-base page fault handling first - use memblock_alloc_try_nid_raw() for kasan shadow page - dma: use kvzalloc() rather than kzalloc()/vzalloc() * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 9331/1: ARM/dma-mapping: replace kzalloc() and vzalloc() with kvzalloc() ARM: 9329/1: kasan: Use memblock_alloc_try_nid_raw for shadow page ARM: 9328/1: mm: try VMA lock-based page fault handling first ARM: 9330/1: davinci: also select PINCTRL ARM: 9327/1: vfp: Add missing VFP instructions to neon_support_hook
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/mach-davinci/Kconfig1
-rw-r--r--arch/arm/mm/dma-mapping.c5
-rw-r--r--arch/arm/mm/fault.c30
-rw-r--r--arch/arm/mm/kasan_init.c8
-rw-r--r--arch/arm/vfp/vfpmodule.c18
6 files changed, 58 insertions, 5 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b67d05468251..0af6709570d1 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -35,6 +35,7 @@ config ARM
select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_HUGETLBFS if ARM_LPAE
+ select ARCH_SUPPORTS_PER_VMA_LOCK
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_USE_MEMTEST
diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig
index 59de137c6f53..2a8a9fe46586 100644
--- a/arch/arm/mach-davinci/Kconfig
+++ b/arch/arm/mach-davinci/Kconfig
@@ -11,6 +11,7 @@ menuconfig ARCH_DAVINCI
select PM_GENERIC_DOMAINS_OF if PM && OF
select REGMAP_MMIO
select RESET_CONTROLLER
+ select PINCTRL
select PINCTRL_SINGLE
if ARCH_DAVINCI
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 5409225b4abc..d688eac6dbc1 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -859,10 +859,7 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size,
int i = 0;
int order_idx = 0;
- if (array_size <= PAGE_SIZE)
- pages = kzalloc(array_size, GFP_KERNEL);
- else
- pages = vzalloc(array_size);
+ pages = kvzalloc(array_size, GFP_KERNEL);
if (!pages)
return NULL;
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index fef62e4a9edd..e96fb40b9cc3 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -278,6 +278,35 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
+ if (!(flags & FAULT_FLAG_USER))
+ goto lock_mmap;
+
+ vma = lock_vma_under_rcu(mm, addr);
+ if (!vma)
+ goto lock_mmap;
+
+ if (!(vma->vm_flags & vm_flags)) {
+ vma_end_read(vma);
+ goto lock_mmap;
+ }
+ fault = handle_mm_fault(vma, addr, flags | FAULT_FLAG_VMA_LOCK, regs);
+ if (!(fault & (VM_FAULT_RETRY | VM_FAULT_COMPLETED)))
+ vma_end_read(vma);
+
+ if (!(fault & VM_FAULT_RETRY)) {
+ count_vm_vma_lock_event(VMA_LOCK_SUCCESS);
+ goto done;
+ }
+ count_vm_vma_lock_event(VMA_LOCK_RETRY);
+
+ /* Quick path to respond to signals */
+ if (fault_signal_pending(fault, regs)) {
+ if (!user_mode(regs))
+ goto no_context;
+ return 0;
+ }
+lock_mmap:
+
retry:
vma = lock_mm_and_find_vma(mm, addr, regs);
if (unlikely(!vma)) {
@@ -316,6 +345,7 @@ retry:
}
mmap_read_unlock(mm);
+done:
/*
* Handle the "normal" case first - VM_FAULT_MAJOR
diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c
index 24d71b5db62d..111d4f703136 100644
--- a/arch/arm/mm/kasan_init.c
+++ b/arch/arm/mm/kasan_init.c
@@ -28,6 +28,12 @@ static pgd_t tmp_pgd_table[PTRS_PER_PGD] __initdata __aligned(PGD_SIZE);
pmd_t tmp_pmd_table[PTRS_PER_PMD] __page_aligned_bss;
+static __init void *kasan_alloc_block_raw(size_t size)
+{
+ return memblock_alloc_try_nid_raw(size, size, __pa(MAX_DMA_ADDRESS),
+ MEMBLOCK_ALLOC_NOLEAKTRACE, NUMA_NO_NODE);
+}
+
static __init void *kasan_alloc_block(size_t size)
{
return memblock_alloc_try_nid(size, size, __pa(MAX_DMA_ADDRESS),
@@ -50,7 +56,7 @@ static void __init kasan_pte_populate(pmd_t *pmdp, unsigned long addr,
if (!pte_none(READ_ONCE(*ptep)))
continue;
- p = kasan_alloc_block(PAGE_SIZE);
+ p = kasan_alloc_block_raw(PAGE_SIZE);
if (!p) {
panic("%s failed to allocate shadow page for address 0x%lx\n",
__func__, addr);
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 7e8773a2d99d..b68efe643a12 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -800,6 +800,24 @@ static struct undef_hook neon_support_hook[] = {{
.cpsr_mask = PSR_T_BIT,
.cpsr_val = PSR_T_BIT,
.fn = vfp_support_entry,
+}, {
+ .instr_mask = 0xff000800,
+ .instr_val = 0xfc000800,
+ .cpsr_mask = 0,
+ .cpsr_val = 0,
+ .fn = vfp_support_entry,
+}, {
+ .instr_mask = 0xff000800,
+ .instr_val = 0xfd000800,
+ .cpsr_mask = 0,
+ .cpsr_val = 0,
+ .fn = vfp_support_entry,
+}, {
+ .instr_mask = 0xff000800,
+ .instr_val = 0xfe000800,
+ .cpsr_mask = 0,
+ .cpsr_val = 0,
+ .fn = vfp_support_entry,
}};
static struct undef_hook vfp_support_hook = {