From mboxrd@z Thu Jan 1 00:00:00 1970 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 EEF30C83F0A for ; Thu, 3 Jul 2025 23:40:58 +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=32BzIHGNp0akvBK9OGz37WAORZ5C+YK3ijDeUf8UyCY=; b=K1Qqi/pcW7pP+BLAgmRjD5eXDG U/AA9ljy3MmF5fKweQHTH3/3wIs3LtbOk1s3iKJ+vn2g+Yk5Cpa+Kzg7lFUla5mVekkuA0rn+lDhf pkxJ12mvBmpZDtu78HcjK43YvS+pg/i/KnqAYulKdVJ81ZpJJq3IJAECvf1e9bk9h0N0iph2eCK+2 8Qi6fyrJqZV+N4CVUtDtkHcmjZGNMbfPAiCXXnDQiZYKbgKcu4okAWq/J9Q9p7v1ibdMeUWJko51K eCVrQ893JIylTc9keXbnH4r9j9fYV1movimklqoRf1erSt7q/oct5VqegGXnxBTvaDxSqY0gem2XF qlMZB79A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uXTXw-0000000Cqw9-2mWr; Thu, 03 Jul 2025 23:40:53 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uXSfl-0000000ClwH-3qa4 for linux-arm-kernel@lists.infradead.org; Thu, 03 Jul 2025 22:44:55 +0000 Received: by linux.microsoft.com (Postfix, from userid 1032) id 92A8821151BE; Thu, 3 Jul 2025 15:44:53 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 92A8821151BE DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1751582693; bh=32BzIHGNp0akvBK9OGz37WAORZ5C+YK3ijDeUf8UyCY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HyWsBdbTfYTmux2z6fic1v81c+SlXy2R+ZaRiPuCKErJfyagh+edfjNDki874GJbA DzX9C/5z3IYgHEXMfOaooa9OQBw4xm9UguLkcWuqNQIiuM02DjLZOlV1VTn2P5lAkY KdA4akRVLO3B4QKaiB2dfZ9etbC+Ue9S1QLiRtT8= From: Nuno Das Neves To: linux-hyperv@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, mhklinux@outlook.com, tglx@linutronix.de, bhelgaas@google.com, romank@linux.microsoft.com Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, catalin.marinas@arm.com, will@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, jinankjain@linux.microsoft.com, skinsburskii@linux.microsoft.com, mrathor@linux.microsoft.com, x86@kernel.org, Nuno Das Neves Subject: [PATCH v2 6/6] PCI: hv: Use the correct hypercall for unmasking interrupts on nested Date: Thu, 3 Jul 2025 15:44:37 -0700 Message-Id: <1751582677-30930-7-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1751582677-30930-1-git-send-email-nunodasneves@linux.microsoft.com> References: <1751582677-30930-1-git-send-email-nunodasneves@linux.microsoft.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250703_154454_054239_7D27240C X-CRM114-Status: GOOD ( 14.50 ) 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 From: Stanislav Kinsburskii Running as nested root on MSHV imposes a different requirement for the pci-hyperv controller. In this setup, the interrupt will first come to the L1 (nested) hypervisor, which will deliver it to the appropriate root CPU. Instead of issuing the RETARGET hypercall, issue the MAP_DEVICE_INTERRUPT hypercall to L1 to complete the setup. Rename hv_arch_irq_unmask() to hv_irq_retarget_interrupt(). Co-developed-by: Jinank Jain Signed-off-by: Jinank Jain Signed-off-by: Stanislav Kinsburskii Signed-off-by: Nuno Das Neves Reviewed-by: Roman Kisel --- drivers/pci/controller/pci-hyperv.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index 4d25754dfe2f..9a8cba39ea6b 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -600,7 +600,7 @@ static unsigned int hv_msi_get_int_vector(struct irq_data *data) #define hv_msi_prepare pci_msi_prepare /** - * hv_arch_irq_unmask() - "Unmask" the IRQ by setting its current + * hv_irq_retarget_interrupt() - "Unmask" the IRQ by setting its current * affinity. * @data: Describes the IRQ * @@ -609,7 +609,7 @@ static unsigned int hv_msi_get_int_vector(struct irq_data *data) * is built out of this PCI bus's instance GUID and the function * number of the device. */ -static void hv_arch_irq_unmask(struct irq_data *data) +static void hv_irq_retarget_interrupt(struct irq_data *data) { struct msi_desc *msi_desc = irq_data_get_msi_desc(data); struct hv_retarget_device_interrupt *params; @@ -714,6 +714,20 @@ static void hv_arch_irq_unmask(struct irq_data *data) dev_err(&hbus->hdev->device, "%s() failed: %#llx", __func__, res); } + +static void hv_arch_irq_unmask(struct irq_data *data) +{ + if (hv_root_partition()) + /* + * In case of the nested root partition, the nested hypervisor + * is taking care of interrupt remapping and thus the + * MAP_DEVICE_INTERRUPT hypercall is required instead of + * RETARGET_INTERRUPT. + */ + (void)hv_map_msi_interrupt(data, NULL); + else + hv_irq_retarget_interrupt(data); +} #elif defined(CONFIG_ARM64) /* * SPI vectors to use for vPCI; arch SPIs range is [32, 1019], but leaving a bit -- 2.34.1