From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7BE4C258EC1; Wed, 25 Feb 2026 19:49:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772048965; cv=none; b=hlVjIOWt6CSpLVU1bA3vPAHvTcHuiLzulDeuTuJS+MPADp3gUevrbWgZd5v5ty/W/5nyRP5a96spMfOCLuorhHvu9x5cpFrAuu983T4qRSl6VaKqaVgt900Q7GzP39JGta1u2VGVL2RMwCjuNyHw4U3H3ogPZqibt+qOeco65nk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772048965; c=relaxed/simple; bh=XXsaVnR5RoMzHp1jwobt30rnkjQCaIg63M0f2GH/7to=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=R1+zsF60tWIEA9NJhxou1Nx6zlWIUrd8T62C2cWZmksTbwtL6e7ZKsFzItYRV7r54c7vDMnU3z1aoQGTS5zfywDJMR+gbcDx1zFZeRVU+I1NK3EvUUtOUAJGucWWGceTRfDYDiZ+BXOQP9fNVgyHm4KfdBzbXkFa/TyR/Y0FT3w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mH5Nc96g; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mH5Nc96g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0C56DC19421; Wed, 25 Feb 2026 19:49:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772048965; bh=XXsaVnR5RoMzHp1jwobt30rnkjQCaIg63M0f2GH/7to=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=mH5Nc96gkSdNQrXq2JqKlgnivuWROGS1fOkYrNsIcdtZOhVDLeh7L+IdNGRFGZTI+ AMGUReARgRcuusg/yOdqATpnaZXDlcf53NNtnKCtQBQZi+Zy13ro0XMvyctxi61xt5 IPOi+OQLpdAzoFC+j3tNfaC+CjXti1YaLnuqidiaAJqFWPvb9hCwyy6GgTTPM6tH84 KrzPHJX8DmacSgdAiRiar6resaQzj6AF7E/uzimOLsUGrJKa1zkdmBPO0xanXyz1uN 8fqe36QjEeK1mAXv9YeIi3t9RFRp9NiRiRUFzEzVl8SmNGsCNH6P6lqiTMy54JsTJJ chVbDsX1x2UCQ== Date: Wed, 25 Feb 2026 19:49:23 +0000 From: Wei Liu To: Anirudh Rayabharam Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 0/2] ARM64 support for doorbell and intercept SINTs Message-ID: <20260225194923.GB413976@liuwe-devbox-debian-v2.local> References: <20260225124403.2187880-1-anirudh@anirudhrb.com> 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=us-ascii Content-Disposition: inline In-Reply-To: <20260225124403.2187880-1-anirudh@anirudhrb.com> On Wed, Feb 25, 2026 at 12:44:01PM +0000, Anirudh Rayabharam wrote: > From: "Anirudh Rayabharam (Microsoft)" > > On x86, the HYPERVISOR_CALLBACK_VECTOR is used to receive synthetic > interrupts (SINTs) from the hypervisor for doorbells and intercepts. > There is no such vector reserved for arm64. > > On arm64, the hypervisor exposes a synthetic register that can be read > to find the INTID that should be used for SINTs. This INTID is in the > PPI range. > [...] > Anirudh Rayabharam (Microsoft) (2): > mshv: refactor synic init and cleanup > mshv: add arm64 support for doorbell & intercept SINTs > > drivers/hv/mshv_root.h | 5 +- > drivers/hv/mshv_root_main.c | 64 ++---------- > drivers/hv/mshv_synic.c | 188 +++++++++++++++++++++++++++++++++--- > include/hyperv/hvgdk_mini.h | 2 + > 4 files changed, 185 insertions(+), 74 deletions(-) Applied to hyperv-fixes. I debated a bit whether this is a new feature or a fix and decided it fixes an important gap in arm64 support. Wei > > -- > 2.34.1 > >