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Message-Id: <20241028053426.2486633-1-anshuman.khandual@arm.com> Date: Mon, 28 Oct 2024 11:04:19 +0530 From: Anshuman Khandual <anshuman.khandual@....com> To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.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 V2 0/7] 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-rc5 although this depends on FEAT_FGT2 FGU series posted earlier, for MDSELR_EL1 handling in various KVM guest configurations. 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 V2: Following changes have been made per review comments from Mark Rutland - Orr MDCR_EL2_EBWE directly without an intermittent register - Alphabetically order header files in debug-monitors.c - Dropped embwe_ref_count mechanism - Dropped preempt_enable() from AARCH64_DBG_READ - Dropped preempt_disable() from AARCH64_DBG_WRITE - Dropped set_bank_index() - Renamed read/write_wb_reg() as __read/__write_wb_reg() - Modified read/write_wb_reg() to have MDSELR_E1 based banked read/write - Added required sysreg tools patches from KVM FEAT_FGT2 series for build Changes in V1: https://lore.kernel.org/all/20241001043602.1116991-1-anshuman.khandual@arm.com/ - 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 (7): arm64/sysreg: Update register fields for ID_AA64MMFR0_EL1 arm64/sysreg: Add register fields for MDSELR_EL1 arm64/sysreg: Add register fields for HDFGRTR2_EL2 arm64/sysreg: Add register fields for HDFGWTR2_EL2 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 | 26 +++++++++ arch/arm64/include/asm/hw_breakpoint.h | 46 ++++++++++++---- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/kernel/cpufeature.c | 21 ++++++-- arch/arm64/kernel/debug-monitors.c | 15 ++++-- arch/arm64/kernel/hw_breakpoint.c | 38 +++++++++++++- arch/arm64/tools/sysreg | 70 +++++++++++++++++++++++++ 9 files changed, 216 insertions(+), 21 deletions(-) -- 2.25.1
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