Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
- Fix SPE probe failure when backing auxbuf with high-order pages
- Fix handling of DMA allocations from outside of the vmalloc area
- Fix generation of build-id ELF section for vDSO object
- Disable huge I/O mappings if kernel page table dumping is enabled
- A few other minor fixes (comments, kconfig etc)
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: vdso: Explicitly add build-id option
arm64/mm: Inhibit huge-vmap with ptdump
arm64: Print physical address of page table base in show_pte()
arm64: don't trash config with compat symbol if COMPAT is disabled
arm64: assembler: Update comment above cond_yield_neon() macro
drivers/perf: arm_spe: Don't error on high-order pages for aux buf
arm64/iommu: handle non-remapped addresses in ->mmap and ->get_sgtable
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 76f6e47..ca9c175 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -69,7 +69,7 @@
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG
select ARCH_SUPPORTS_NUMA_BALANCING
- select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+ select ARCH_WANT_COMPAT_IPC_PARSE_VERSION if COMPAT
select ARCH_WANT_FRAME_POINTERS
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARM_AMBA
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 039fbd8..92b6b7c 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -718,12 +718,11 @@
* the output section, any use of such directives is undefined.
*
* The yield itself consists of the following:
- * - Check whether the preempt count is exactly 1, in which case disabling
- * preemption once will make the task preemptible. If this is not the case,
- * yielding is pointless.
- * - Check whether TIF_NEED_RESCHED is set, and if so, disable and re-enable
- * kernel mode NEON (which will trigger a reschedule), and branch to the
- * yield fixup code.
+ * - Check whether the preempt count is exactly 1 and a reschedule is also
+ * needed. If so, calling of preempt_enable() in kernel_neon_end() will
+ * trigger a reschedule. If it is not the case, yielding is pointless.
+ * - Disable and re-enable kernel mode NEON, and branch to the yield fixup
+ * code.
*
* This macro sequence may clobber all CPU state that is not guaranteed by the
* AAPCS to be preserved across an ordinary function call.
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 744b9db..fa230ff 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -12,8 +12,8 @@
targets := $(obj-vdso) vdso.so vdso.so.dbg
obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
-ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 \
- $(call ld-option, --hash-style=sysv) -n -T
+ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv \
+ --build-id -n -T
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 78c0a72..674860e 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -249,6 +249,11 @@
if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
return ret;
+ if (!is_vmalloc_addr(cpu_addr)) {
+ unsigned long pfn = page_to_pfn(virt_to_page(cpu_addr));
+ return __swiotlb_mmap_pfn(vma, pfn, size);
+ }
+
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
/*
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
@@ -272,6 +277,11 @@
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
struct vm_struct *area = find_vm_area(cpu_addr);
+ if (!is_vmalloc_addr(cpu_addr)) {
+ struct page *page = virt_to_page(cpu_addr);
+ return __swiotlb_get_sgtable_page(sgt, page, size);
+ }
+
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
/*
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 0cb0e09..dda234b 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -171,9 +171,10 @@
return;
}
- pr_alert("%s pgtable: %luk pages, %u-bit VAs, pgdp = %p\n",
+ pr_alert("%s pgtable: %luk pages, %u-bit VAs, pgdp=%016lx\n",
mm == &init_mm ? "swapper" : "user", PAGE_SIZE / SZ_1K,
- mm == &init_mm ? VA_BITS : (int) vabits_user, mm->pgd);
+ mm == &init_mm ? VA_BITS : (int)vabits_user,
+ (unsigned long)virt_to_phys(mm->pgd));
pgdp = pgd_offset(mm, addr);
pgd = READ_ONCE(*pgdp);
pr_alert("[%016lx] pgd=%016llx", addr, pgd_val(pgd));
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index a170c63..a1bfc44 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -955,13 +955,18 @@
int __init arch_ioremap_pud_supported(void)
{
- /* only 4k granule supports level 1 block mappings */
- return IS_ENABLED(CONFIG_ARM64_4K_PAGES);
+ /*
+ * Only 4k granule supports level 1 block mappings.
+ * SW table walks can't handle removal of intermediate entries.
+ */
+ return IS_ENABLED(CONFIG_ARM64_4K_PAGES) &&
+ !IS_ENABLED(CONFIG_ARM64_PTDUMP_DEBUGFS);
}
int __init arch_ioremap_pmd_supported(void)
{
- return 1;
+ /* See arch_ioremap_pud_supported() */
+ return !IS_ENABLED(CONFIG_ARM64_PTDUMP_DEBUGFS);
}
int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot)
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 7cb766d..e120f93 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -855,16 +855,8 @@
if (!pglist)
goto out_free_buf;
- for (i = 0; i < nr_pages; ++i) {
- struct page *page = virt_to_page(pages[i]);
-
- if (PagePrivate(page)) {
- pr_warn("unexpected high-order page for auxbuf!");
- goto out_free_pglist;
- }
-
+ for (i = 0; i < nr_pages; ++i)
pglist[i] = virt_to_page(pages[i]);
- }
buf->base = vmap(pglist, nr_pages, VM_MAP, PAGE_KERNEL);
if (!buf->base)
