From mboxrd@z Thu Jan 1 00:00:00 1970 From: lkcl@lkcl.net (Luke Kenneth Casson Leighton) Date: Sat, 10 Nov 2018 19:33:21 +0000 Subject: [sw-dev] SBI extension proposal v2 In-Reply-To: References: <4aef7216-726c-f565-5c0f-cebd2aefb46d@wdc.com> <2e5329eff04e2b0bc2433b5d974bf10f@mailhost.ics.forth.gr> <84838217ee26d70634368ef63d43427d@mailhost.ics.forth.gr> Message-ID: To: linux-riscv@lists.infradead.org List-Id: linux-riscv.lists.infradead.org On Sat, Nov 10, 2018 at 6:02 PM ron minnich wrote: > Actually, as long as the option remains to let the kernel replace the > SBI with something else, I'm not that worried about what vendors put > in it. But that option needs to remain there. i remember you saying, when the boot discussion came up a couple weeks ago, and agree absolutely: the option in real hardware to shut off and replace whatever's got you up and running is critical. there's a huge range of uses to which SBI is (and can be) put: i threw some ideas out there, i feel it's important to bear that in mind. it's not just used for booting, it's also got simulation, debugging, development and critical first silicon bring-up potential, out-of-band remote power management potential uses, virtual management potential, and shed-loads more. l. 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Sat, 10 Nov 2018 11:33:33 -0800 (PST) MIME-Version: 1.0 References: <4aef7216-726c-f565-5c0f-cebd2aefb46d@wdc.com> <2e5329eff04e2b0bc2433b5d974bf10f@mailhost.ics.forth.gr> <84838217ee26d70634368ef63d43427d@mailhost.ics.forth.gr> In-Reply-To: From: Luke Kenneth Casson Leighton Date: Sat, 10 Nov 2018 19:33:21 +0000 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [sw-dev] SBI extension proposal v2 To: ron minnich X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181110_143415_773144_18AE94B4 X-CRM114-Status: UNSURE ( 8.15 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, hch@infradead.org, Damien.LeMoal@wdc.com, Olof Johansson , alankao@andestech.com, abner.chang@hpe.com, atish.patra@wdc.com, Anup Patel , Palmer Dabbelt , Alexander Graf , zong@andestech.com, Olof Johansson , sw-dev@groups.riscv.org, paul.walmsley@sifive.com, mick@ics.forth.gr, Alistair.Francis@wdc.com, linux-riscv@lists.infradead.org, Andrew Waterman Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Message-ID: <20181110193321.x6wv4DKX3MnuBWS9QZJMIa0oRnD3u7fzKx17-VOBOzQ@z> On Sat, Nov 10, 2018 at 6:02 PM ron minnich wrote: > Actually, as long as the option remains to let the kernel replace the > SBI with something else, I'm not that worried about what vendors put > in it. But that option needs to remain there. i remember you saying, when the boot discussion came up a couple weeks ago, and agree absolutely: the option in real hardware to shut off and replace whatever's got you up and running is critical. there's a huge range of uses to which SBI is (and can be) put: i threw some ideas out there, i feel it's important to bear that in mind. it's not just used for booting, it's also got simulation, debugging, development and critical first silicon bring-up potential, out-of-band remote power management potential uses, virtual management potential, and shed-loads more. l. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv