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This patch implements x86_page_ops in mm.py. > > Additionally, CONFIG_PAGE_SHIFT is required for the calculation but > was only available for ARM64 in constants.py.in. This patch moves > it to be available for all architectures. > > Signed-off-by: Seongjun Hong > --- > scripts/gdb/linux/constants.py.in | 2 +- > scripts/gdb/linux/mm.py | 25 ++++++++++++++++++++++++- > 2 files changed, 25 insertions(+), 2 deletions(-) > > diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in > index c3886739a028..11fd4ba6ba85 100644 > --- a/scripts/gdb/linux/constants.py.in > +++ b/scripts/gdb/linux/constants.py.in > @@ -150,8 +150,8 @@ LX_CONFIG(CONFIG_ARM64_64K_PAGES) > if IS_BUILTIN(CONFIG_ARM64): > LX_VALUE(CONFIG_ARM64_PA_BITS) > LX_VALUE(CONFIG_ARM64_VA_BITS) > - LX_VALUE(CONFIG_PAGE_SHIFT) > LX_VALUE(CONFIG_ARCH_FORCE_MAX_ORDER) > +LX_VALUE(CONFIG_PAGE_SHIFT) > LX_CONFIG(CONFIG_SPARSEMEM) > LX_CONFIG(CONFIG_SPARSEMEM_EXTREME) > LX_CONFIG(CONFIG_SPARSEMEM_VMEMMAP) > diff --git a/scripts/gdb/linux/mm.py b/scripts/gdb/linux/mm.py > index 7571aebbe650..d6e84e4bf102 100644 > --- a/scripts/gdb/linux/mm.py > +++ b/scripts/gdb/linux/mm.py > @@ -26,8 +26,31 @@ class page_ops(): > raise gdb.GdbError('Only support CONFIG_SPARSEMEM_VMEMMAP now') > if constants.LX_CONFIG_ARM64 and utils.is_target_arch('aarch64'): > self.ops = aarch64_page_ops() > + elif utils.is_target_arch('x86_64') or utils.is_target_arch('x86-64'): > + self.ops = x86_page_ops() > else: > - raise gdb.GdbError('Only support aarch64 now') > + raise gdb.GdbError('Only support aarch64 and x86_64 now') > + > +class x86_page_ops(): > + def __init__(self): > + self.MAX_NUMNODES = 1 << constants.LX_CONFIG_NODES_SHIFT > + self.struct_page_size = utils.get_page_type().sizeof > + self.PAGE_SHIFT = constants.LX_CONFIG_PAGE_SHIFT > + self.PAGE_SIZE = 1 << self.PAGE_SHIFT > + self.PAGE_OFFSET = int(gdb.parse_and_eval("page_offset_base")) > + self.VMEMMAP_START = int(gdb.parse_and_eval("vmemmap_base")) > + > + def page_to_virt(self, page): > + page_ptr = page.cast(utils.get_page_type().pointer()) > + vmemmap_ptr = gdb.Value(self.VMEMMAP_START).cast(utils.get_page_type().pointer()) > + idx = int(page_ptr - vmemmap_ptr) > + return self.PAGE_OFFSET + (idx * self.PAGE_SIZE) > + > + def page_address(self, page): > + return self.page_to_virt(page) > + > + def folio_address(self, folio): > + return self.page_address(folio['page'].address) > > class aarch64_page_ops(): > def __init__(self): Thanks for the contribution! From my quick (re-)reading, there are more page_ops than what you implement above. I think command like lx-pfn_to_page will now cause splats rather than a nicer "not implemented yet". Could you add the missing ops or handle those cases more gracefully for now? Jan -- Siemens AG, Foundational Technologies Linux Expert Center