linux-kernel - [PATCH v2 0/3] riscv: Per-thread envcfg CSR support

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Message-ID: <20240613171447.3176616-1-samuel.holland@sifive.com>
Date: Thu, 13 Jun 2024 10:14:38 -0700
From: Samuel Holland <samuel.holland@...ive.com>
To: linux-riscv@...ts.infradead.org,
	Palmer Dabbelt <palmer@...belt.com>
Cc: Andrew Jones <ajones@...tanamicro.com>,
	Conor Dooley <conor@...nel.org>,
	linux-kernel@...r.kernel.org,
	Deepak Gupta <debug@...osinc.com>,
	Samuel Holland <samuel.holland@...ive.com>
Subject: [PATCH v2 0/3] riscv: Per-thread envcfg CSR support

This series (or equivalent) is a prerequisite for both user-mode pointer
masking and CFI support, as those are per-thread features are controlled
by fields in the envcfg CSR. These patches are based on v1 of the
pointer masking series[1], with significant input from both Deepak and
Andrew. By sending this as a separate series, hopefully we can converge
on a single implementation of this functionality.

[1]: https://lore.kernel.org/linux-riscv/20240319215915.832127-6-samuel.holland@sifive.com/

Changes in v2:
 - Rebase on riscv/linux.git for-next

Samuel Holland (3):
  riscv: Enable cbo.zero only when all harts support Zicboz
  riscv: Add support for per-thread envcfg CSR values
  riscv: Call riscv_user_isa_enable() only on the boot hart

 arch/riscv/include/asm/cpufeature.h |  2 +-
 arch/riscv/include/asm/processor.h  |  1 +
 arch/riscv/include/asm/switch_to.h  |  8 ++++++++
 arch/riscv/kernel/cpufeature.c      | 13 +++++++++----
 arch/riscv/kernel/smpboot.c         |  2 --
 arch/riscv/kernel/suspend.c         |  4 ++--
 6 files changed, 21 insertions(+), 9 deletions(-)

-- 
2.44.1