From patchwork Wed Feb 26 23:07:58 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nuno Das Neves X-Patchwork-Id: 13993307 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 08714C021B8 for ; Wed, 26 Feb 2025 23:10:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=tIVrfttD91JAtEfLmtb1QJhK1PICItl6xsHcfajlSko=; b=twtAcy/uV+2Q7WJ06QRem9exqo ICzQ0yRynPORSiGUE+IQoBnfJHoAiWWwBJfRh4y9x77NBmGHnvBSdz4Pt8jBB0fEztFUaqdapMmhn St+xBpYvRx/bU/06NtW+0Syx7B1OayrzRtq/MTeIM242PPxx65ApcmMkjpOQZ/e3p+LmnY6wN8TaY jVc+1CxDTzlIPuycxyB3x8dCgYnu6b6TurrUk9eMTD+37CHYwxGJvQLul1lCNM5P5o5wPi/lFF/H5 mu4/zMJVXWBzQwO5/K3HuxIVJBR3LZhWU8W50qIxs+Taeiv4XITlOhTiE4GK+LQ5FdZ0FJUlKagfB aVKx70MQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnQY1-00000005fLh-0450; Wed, 26 Feb 2025 23:10:37 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnQWS-00000005evO-2q2I for linux-arm-kernel@lists.infradead.org; Wed, 26 Feb 2025 23:09:01 +0000 Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id EAD3C210EAC9; Wed, 26 Feb 2025 15:08:58 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com EAD3C210EAC9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1740611339; bh=tIVrfttD91JAtEfLmtb1QJhK1PICItl6xsHcfajlSko=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EJpPKERW1PefhigZxbH27ZOLBfjmlucD5ZZQ3SSUVqQFAALsU1H/JFCFyJIFfxmV5 MVhhw3mXtZo8VuzmBtNQAAeUM20G0Ns727Cij61STDqXueDS6YhSqlSAlaZpqXJ8Tc yJGkiKBE1Lhxpy4BprrtKjjdgsM0brWc1Y2pHXzQ= From: Nuno Das Neves To: linux-hyperv@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-acpi@vger.kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, mhklinux@outlook.com, decui@microsoft.com, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, daniel.lezcano@linaro.org, joro@8bytes.org, robin.murphy@arm.com, arnd@arndb.de, jinankjain@linux.microsoft.com, muminulrussell@gmail.com, skinsburskii@linux.microsoft.com, mrathor@linux.microsoft.com, ssengar@linux.microsoft.com, apais@linux.microsoft.com, Tianyu.Lan@microsoft.com, stanislav.kinsburskiy@gmail.com, gregkh@linuxfoundation.org, vkuznets@redhat.com, prapal@linux.microsoft.com, muislam@microsoft.com, anrayabh@linux.microsoft.com, rafael@kernel.org, lenb@kernel.org, corbet@lwn.net Subject: [PATCH v5 04/10] hyperv: Introduce hv_recommend_using_aeoi() Date: Wed, 26 Feb 2025 15:07:58 -0800 Message-Id: <1740611284-27506-5-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1740611284-27506-1-git-send-email-nunodasneves@linux.microsoft.com> References: <1740611284-27506-1-git-send-email-nunodasneves@linux.microsoft.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250226_150900_768790_E4632BFB X-CRM114-Status: GOOD ( 10.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Factor out the check for enabling auto eoi, to be reused in root partition code. Signed-off-by: Nuno Das Neves Reviewed-by: Stanislav Kinsburskii --- drivers/hv/hv.c | 12 +----------- include/asm-generic/mshyperv.h | 13 +++++++++++++ 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index a38f84548bc2..308c8f279df8 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -313,17 +313,7 @@ void hv_synic_enable_regs(unsigned int cpu) shared_sint.vector = vmbus_interrupt; shared_sint.masked = false; - - /* - * On architectures where Hyper-V doesn't support AEOI (e.g., ARM64), - * it doesn't provide a recommendation flag and AEOI must be disabled. - */ -#ifdef HV_DEPRECATING_AEOI_RECOMMENDED - shared_sint.auto_eoi = - !(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED); -#else - shared_sint.auto_eoi = 0; -#endif + shared_sint.auto_eoi = hv_recommend_using_aeoi(); hv_set_msr(HV_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); /* Enable the global synic bit */ diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 258034dfd829..1f46d19a16aa 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -77,6 +77,19 @@ extern u64 hv_do_fast_hypercall16(u16 control, u64 input1, u64 input2); bool hv_isolation_type_snp(void); bool hv_isolation_type_tdx(void); +/* + * On architectures where Hyper-V doesn't support AEOI (e.g., ARM64), + * it doesn't provide a recommendation flag and AEOI must be disabled. + */ +static inline bool hv_recommend_using_aeoi(void) +{ +#ifdef HV_DEPRECATING_AEOI_RECOMMENDED + return !(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED); +#else + return false; +#endif +} + static inline struct hv_proximity_domain_info hv_numa_node_to_pxm_info(int node) { struct hv_proximity_domain_info pxm_info = {};