From: Yu-Chien Peter Lin <peter.lin@sifive.com>
To: opensbi@lists.infradead.org
Cc: zong.li@sifive.com, greentime.hu@sifive.com, anup@brainfault.org,
scott@riscstar.com, conor@kernel.org, dave.patel@riscstar.com,
raymond.mao@riscstar.com, robin.randhawa@sifive.com,
samuel.holland@sifive.com, pawandeep.oza@oss.qualcomm.com,
krzk@kernel.org
Subject: Re: [PATCH v2 5/9] lib: sbi_hart: add WID protection mechanism
Date: Tue, 18 Aug 2026 10:39:30 +0800 [thread overview]
Message-ID: <aoPF4mzra0LdDfKm@plin-1878> (raw)
In-Reply-To: <20260817090503.2104998-6-peter.lin@sifive.com>
On Mon, Aug 17, 2026 at 05:04:59PM +0800, Yu-Chien Peter Lin wrote:
> Register a WID-based hart protection mechanism that
> configures mlwid and mwiddeleg CSRs on domain entry.
> This enables the protection framework reconfigure WID
> isolation whenever domains are switched.
>
> Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com>
> ---
> Changes v1 -> v2:
> - Validate WID against pmlwidlist before writing mlwid CSR (Oza)
> ---
> include/sbi/sbi_hart_worlds.h | 24 ++++++++++++
> lib/sbi/objects.mk | 1 +
> lib/sbi/sbi_hart.c | 5 +++
> lib/sbi/sbi_hart_worlds.c | 72 +++++++++++++++++++++++++++++++++++
> 4 files changed, 102 insertions(+)
> create mode 100644 include/sbi/sbi_hart_worlds.h
> create mode 100644 lib/sbi/sbi_hart_worlds.c
>
> diff --git a/include/sbi/sbi_hart_worlds.h b/include/sbi/sbi_hart_worlds.h
> new file mode 100644
> index 00000000..2bb35a7e
> --- /dev/null
> +++ b/include/sbi/sbi_hart_worlds.h
> @@ -0,0 +1,24 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * Copyright (c) 2026 SiFive Inc.
> + */
> +
> +#ifndef __SBI_HART_WORLDS_H__
> +#define __SBI_HART_WORLDS_H__
> +
> +struct sbi_scratch;
> +
> +/**
> + * Initialize WID hart protection for current HART
> + *
> + * Registers the WID protection mechanism if Smwid/Smlwid
> + * extensions are present.
Only Smlwid is needed for registration. Will update comment here
in the next version.
--
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next prev parent reply other threads:[~2026-08-18 2:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 9:04 [PATCH v2 0/9] Add RISC-V Worlds ISA support to OpenSBI Yu-Chien Peter Lin
2026-08-17 9:04 ` [PATCH v2 1/9] lib: sbi_hart: detect RISC-V Worlds ISA extensions Yu-Chien Peter Lin
2026-09-03 16:50 ` Pawandeep Oza
2026-08-17 9:04 ` [PATCH v2 2/9] lib: utils: fdt_helper: parse RISC-V Worlds per-hart WID properties Yu-Chien Peter Lin
2026-09-03 21:15 ` Pawandeep Oza
2026-08-17 9:04 ` [PATCH v2 3/9] lib: fdt_domain: parse domain " Yu-Chien Peter Lin
2026-09-03 21:18 ` Pawandeep Oza
2026-08-17 9:04 ` [PATCH v2 4/9] lib: sbi_hart: lock mwid CSR for RoT immutability Yu-Chien Peter Lin
2026-09-03 21:20 ` Pawandeep Oza
2026-08-17 9:04 ` [PATCH v2 5/9] lib: sbi_hart: add WID protection mechanism Yu-Chien Peter Lin
2026-08-18 2:39 ` Yu-Chien Peter Lin [this message]
2026-08-17 9:05 ` [PATCH v2 6/9] lib: sbi_domain_context: add slwid to per-domain S-mode context Yu-Chien Peter Lin
2026-08-17 9:05 ` [PATCH v2 7/9] include: sbi_types: add PRIx64 format macro Yu-Chien Peter Lin
2026-08-17 9:05 ` [PATCH v2 8/9] lib: sbi: display World ID configuration at boot Yu-Chien Peter Lin
2026-08-17 9:05 ` [PATCH v2 9/9] docs: document WID DT properties Yu-Chien Peter Lin
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