From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 57A6412CDAE; Tue, 10 Jun 2025 16:06:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749571620; cv=none; b=ozyb1MEezWlqBW99Te8Gv0w1lZ8wLH2nwgep2hhoYhfbU8uM8PARXvu9aj+j3vctBZspkGbJ4Ll5+0M1ZEjX+1LsNIoYgozvNRhVtSBH59oyZD5ZIbjcaltIQ+99zvaHnK+mjyEFDzlxoq2usvADgJpW6Fwsg2uUNBrc7fZVpX8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749571620; c=relaxed/simple; bh=EF6+Ekp5LFOn/Da+vUOZnyB0ssktivNlZp8mV3L4hrs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SNn37Q9CcYn+YMWFj0ZkJe72W+Rj6n4k9OQdSvK4JKTw/tXJI9RvhgVuyKudBzRn35HaJiROjjqWf/Bsn1brocccfE6I4J9YTsuadfeY9VfwEM75JRx8+nf3i2UCH786yTU15tDicC9Anf0P6z8vdYywqGJ6Xw6fjU2sLLXxkC0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=O51AOjvt; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="O51AOjvt" Received: from romank-3650.corp.microsoft.com (unknown [131.107.160.188]) by linux.microsoft.com (Postfix) with ESMTPSA id C0A4D21175A4; Tue, 10 Jun 2025 09:06:58 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com C0A4D21175A4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1749571618; bh=EF6+Ekp5LFOn/Da+vUOZnyB0ssktivNlZp8mV3L4hrs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O51AOjvtxzIfvKmh7tEijTRnn/KFclGPxRlbGJi/7DMCm2/914JouuKmN2ZR3p7pj zQhrDQVXBPTWDBLH/QVuZVmMdcurziTUwQge77GOf7nBMJAlWrHcVXcJ2//OLJ3yDR 5X3Zj1w9sseHk+6K9ekaKxn4eKmglkCxmTcTHg3k= From: Roman Kisel To: sudeep.holla@arm.com Cc: anirudh@anirudhrb.com, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, lpieralisi@kernel.org, mark.rutland@arm.com Subject: Re: [PATCH] firmware: smccc: support both conduits for getting hyp UUID Date: Tue, 10 Jun 2025 09:06:48 -0700 Message-ID: <20250610160656.11984-1-romank@linux.microsoft.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250605-kickass-cerulean-honeybee-aa0cba@sudeepholla> References: <20250605-kickass-cerulean-honeybee-aa0cba@sudeepholla> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit > (sorry for the delay, found the patch in the spam 🙁) "b4" shows the the mail server used for the patch submission doesn't pass the DKIM check, so finding the patch in the spam seems expected :) Thanks for your help! > > On Wed, May 21, 2025 at 09:40:48AM +0000, Anirudh Rayabharam wrote: >> From: Anirudh Rayabharam (Microsoft) >> >> When Linux is running as the root partition under Microsoft Hypervisor >> (MSHV) a.k.a Hyper-V, smc is used as the conduit for smc calls. >> >> Extend arm_smccc_hypervisor_has_uuid() to support this usecase. Use >> arm_smccc_1_1_invoke to retrieve and use the appropriate conduit instead >> of supporting only hvc. >> >> Boot tested on MSHV guest, MSHV root & KVM guest. >> > > Reviewed-by: Sudeep Holla > > Are they any dependent patches or series using this ? Do you plan to > route it via KVM tree if there are any dependency. Or else I can push > it through (arm-)soc tree. Let me know. Anirudh had been OOF for some time and would be for another week iiuc so I thought I'd reply. The patch this depends on is 13423063c7cb ("arm64: kvm, smccc: Introduce and use API for getting hypervisor UUID"), and this patch has already been pulled into the Linus'es tree. As for routing, (arm-)soc should be good it appears as the change is contained within the firmware drivers path. Although I'd trust more to your, Arnd's or Wei's opinion than mine! > > -- > Regards, > Sudeep