linux-kernel - [RFC 0/3] arm64/ptdump: Add ARM64_PTDUMP

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Message-Id: <20250818091436.938517-1-anshuman.khandual@arm.com>
Date: Mon, 18 Aug 2025 14:44:33 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-arm-kernel@...ts.infradead.org
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Ryan Roberts <ryan.roberts@....com>,
	Mark Rutland <mark.rutland@....com>,
	linux-kernel@...r.kernel.org
Subject: [RFC 0/3] arm64/ptdump: Add ARM64_PTDUMP_CONSOLE

Enable early kernel page table dump for debug purpose when required through
a new config ARM64_PTDUMP_CONSOLE. But first this reorganizes ptdump_init()
separating out the debugfs creation so that it can be called early on. Then
adds kernel console print support for existing pt_dump_seq_[printf|puts]()
helpers.

This series applies on v6.17-rc2

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Brown <broonie@...nel.org>
Cc: Ryan Roberts <ryan.roberts@....com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org

Anshuman Khandual (3):
  arm64/ptdump: Re-organize ptdump_init()
  arm64/ptdump: Enable console output in pt_dump_seq_[printf|puts]()
  arm64/ptdump: Add ARM64_PTDUMP_CONSOLE

 arch/arm64/Kconfig.debug           | 12 +++++++++
 arch/arm64/include/asm/ptdump.h    |  9 +++++++
 arch/arm64/kernel/setup.c          |  3 +++
 arch/arm64/mm/ptdump.c             | 42 ++++++++++++++++++++++--------
 drivers/firmware/efi/arm-runtime.c |  4 +--
 5 files changed, 57 insertions(+), 13 deletions(-)

-- 
2.25.1