From patchwork Fri Mar 14 19:28:50 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: 873513 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 14319204F65; Fri, 14 Mar 2025 19:29:24 +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=1741980566; cv=none; b=TMUr4GrlS3yVoVr6WowvISqx4l62n+jKzDafcL0XS542NRtIA4rpXKhHYlKngtHhXYwuLhHm2DV+P8XicJYrlxCMYJONN4Nfxq+F/8Uis1Iyl5AYJJePxxiwwdpBa87AA66fpBUrbUUStbKsqWXG6Y8Yxd/c53DRazak2smKFAo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741980566; c=relaxed/simple; bh=V6/a/l1LIEQDtZUWC3im2eRpM0YRTiouLsYlGTsKSss=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=K+dsbx4HhRFwQW0mAVn8z+laZbUWQJ+UGPeRBQdmqWsETr3ADzY+mi8W2FzQtO1koe7Kd0/Q5g6r6dDtSqe5At/k/w5eV1lHEU39h8K0mBsk9HRRvNrwhbPEDCAbH0EgIZcgYwwjrWur4He29zSfVFycgqaD0ShHcHGHZQvG2QY= 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=LJHeMn5y; 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="LJHeMn5y" Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 7AC4F203345B; Fri, 14 Mar 2025 12:29:24 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7AC4F203345B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1741980564; bh=utJMkJZ9Gl5P1DrxVDG/0o+Zv8qkpo1fMxwwRlX4UR4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LJHeMn5yTvvBeQxzdXDTwSuQizpptvJ+Kxp/xmBk/lsEbzFRS7ETcGe8ZOP744RJ+ XEelsIIyeM2OzNUwiSuNWnVnmcDVt/YIGUPlmgXjMjIUyk3NOYuCbk3rUkXKFozzRg l0j5z1FyepIE2G2v6FP0NcaDSOUzzfOwovKQeIsM= 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, mhklinux@outlook.com, ltykernel@gmail.com, stanislav.kinsburskiy@gmail.com, linux-acpi@vger.kernel.org, eahariha@linux.microsoft.com, jeff.johnson@oss.qualcomm.com Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, 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, gregkh@linuxfoundation.org, vkuznets@redhat.com, prapal@linux.microsoft.com, anrayabh@linux.microsoft.com, rafael@kernel.org, lenb@kernel.org, corbet@lwn.net Subject: [PATCH v6 04/10] hyperv: Introduce hv_recommend_using_aeoi() Date: Fri, 14 Mar 2025 12:28:50 -0700 Message-Id: <1741980536-3865-5-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1741980536-3865-1-git-send-email-nunodasneves@linux.microsoft.com> References: <1741980536-3865-1-git-send-email-nunodasneves@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Factor out the check for enabling auto eoi, to be reused in root partition code. No functional changes. Signed-off-by: Nuno Das Neves Reviewed-by: Stanislav Kinsburskii Reviewed-by: Easwar Hariharan Reviewed-by: Michael Kelley Reviewed-by: Tianyu Lan --- 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 c3697bc0598d..8519b8ec8e9d 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -77,6 +77,19 @@ 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 = {};