Messages in this thread Patch in this message |  | | From | Baoquan He <> | Subject | [PATCH v1 6/7] powerpc: mm: add VM_IOREMAP flag to the vmalloc area | Date | Sun, 4 Dec 2022 09:30:45 +0800 |
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Currently, for vmalloc areas with flag VM_IOREMAP set, except of the specific alignment clamping in __get_vm_area_node(), they will be 1) Shown as ioremap in /proc/vmallocinfo; 2) Ignored by /proc/kcore reading via vread()
So for the io mapping in ioremap_phb() of ppc, we should set VM_IOREMAP in flag to make it handled correctly as above.
Signed-off-by: Baoquan He <bhe@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: "Pali Rohár" <pali@kernel.org> Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/kernel/pci_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index 0c7cfb9fab04..fd42059ae2a5 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -132,7 +132,7 @@ void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size) * address decoding but I'd rather not deal with those outside of the * reserved 64K legacy region. */ - area = __get_vm_area_caller(size, 0, PHB_IO_BASE, PHB_IO_END, + area = __get_vm_area_caller(size, VM_IOREMAP, PHB_IO_BASE, PHB_IO_END, __builtin_return_address(0)); if (!area) return NULL; -- 2.34.1
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