linux-kernel - Re: [PATCH v8 14/14] RISC-V: KVM: add support for SBI_FWFT_MISALIGNED

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

Message-Id: <DA3KATTIZQ99.2M1SWQ64M9WX8@ventanamicro.com>
Date: Fri, 23 May 2025 15:08:04 +0200
From: Radim Krčmář <rkrcmar@...tanamicro.com>
To: Clément Léger <cleger@...osinc.com>, "Paul
 Walmsley" <paul.walmsley@...ive.com>, "Palmer Dabbelt"
 <palmer@...belt.com>, "Anup Patel" <anup@...infault.org>, "Atish Patra"
 <atishp@...shpatra.org>, "Shuah Khan" <shuah@...nel.org>, "Jonathan Corbet"
 <corbet@....net>, <linux-riscv@...ts.infradead.org>,
 <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
 <kvm@...r.kernel.org>, <kvm-riscv@...ts.infradead.org>,
 <linux-kselftest@...r.kernel.org>
Cc: "Samuel Holland" <samuel.holland@...ive.com>, "Andrew Jones"
 <ajones@...tanamicro.com>, "Deepak Gupta" <debug@...osinc.com>, "Charlie
 Jenkins" <charlie@...osinc.com>, "Atish Patra" <atishp@...osinc.com>,
 "linux-riscv" <linux-riscv-bounces@...ts.infradead.org>
Subject: Re: [PATCH v8 14/14] RISC-V: KVM: add support for
 SBI_FWFT_MISALIGNED_DELEG

2025-05-23T12:19:31+02:00, Clément Léger <cleger@...osinc.com>:
> SBI_FWFT_MISALIGNED_DELEG needs hedeleg to be modified to delegate
> misaligned load/store exceptions. Save and restore it during CPU
> load/put.

How do you plan to access the value of hedeleg & MIS_DELEG from
userspace?

(I think that modeling medeleg in ONE_REG is a clean solution.)

Thanks.