linux-kernel - [PATCH 0/3] arm64/hw_breakpoint: Enable FEAT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241001043602.1116991-1-anshuman.khandual@arm.com>
Date: Tue,  1 Oct 2024 10:05:59 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Jonathan Corbet <corbet@....net>,
	Marc Zyngier <maz@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	James Morse <james.morse@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	kvmarm@...ts.linux.dev
Subject: [PATCH 0/3] arm64/hw_breakpoint: Enable FEAT_Debugv8p9

This series enables FEAT_Debugv8p9 thus extending breakpoint and watchpoint
support upto 64. This series is based on v6.12-rc1 after applying the KVM
FEAT_FGT2 FGU series.

https://lore.kernel.org/all/20241001024356.1096072-1-anshuman.khandual@arm.com/

Cc: Jonathan Corbet <corbet@....net>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Oliver Upton <oliver.upton@...ux.dev>
Cc: James Morse <james.morse@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Brown <broonie@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: kvmarm@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org

Changes in V1:

- Changed FTR_STRICT to FTR_NONSTRICT for the following ID_AA64DFR1_EL1
  register fields - ABL_CMPs, DPFZS, PMICNTR, CTX_CMPs, WRPs and BRPs

Changes in RFC V2:

https://lore.kernel.org/linux-arm-kernel/20240620092607.267132-1-anshuman.khandual@arm.com/

- This series has been split from RFC V1 dealing only with arm64 breakpoints
- Restored back DBG_MDSCR_MASK definition (unrelated change)
- Added preempt_disable()/enable() blocks between selecting banks and registers

Changes in RFC:

https://lore.kernel.org/all/20240405080008.1225223-1-anshuman.khandual@arm.com/

Anshuman Khandual (3):
  arm64/cpufeature: Add field details for ID_AA64DFR1_EL1 register
  arm64/boot: Enable EL2 requirements for FEAT_Debugv8p9
  arm64/hw_breakpoint: Enable FEAT_Debugv8p9

 Documentation/arch/arm64/booting.rst    | 19 ++++++++++
 arch/arm64/include/asm/debug-monitors.h |  1 +
 arch/arm64/include/asm/el2_setup.h      | 27 +++++++++++++
 arch/arm64/include/asm/hw_breakpoint.h  | 50 ++++++++++++++++++++-----
 arch/arm64/include/asm/kvm_arm.h        |  1 +
 arch/arm64/kernel/cpufeature.c          | 21 ++++++++---
 arch/arm64/kernel/debug-monitors.c      | 16 ++++++--
 arch/arm64/kernel/hw_breakpoint.c       | 33 ++++++++++++++++
 8 files changed, 149 insertions(+), 19 deletions(-)

-- 
2.25.1