From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09E984749F8 for ; Tue, 28 Jul 2026 22:10:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785276636; cv=none; b=AokNK7rHgseJDvNuZ/DyaOm4UcvNNPAZMODDbys8bpo02tpsP8X+BvMXdrzWtWGXulcVfk75IovJLjDS4ZWuS11mzVr56+hNRCNlhF9VWsFpOX3+1SE3vPTc6GkSmEO5t+wct/NPPqMK7PpJrGsG08GpxSf7ZfIayrm6W4KfCj4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785276636; c=relaxed/simple; bh=+1okqgFEVMup12nSFgGpuP3kzZnjOLUGUFN4+7jdw2g=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=NujQW+OBF8d83yHKKTeEnHukFGEY5ygQ14dZUx6kh/LMbjNuTTEGDS7dqVmtKF/CccOrgZ22vVmQ8kd3jfV7IvxCmVkMxEWscYcHoaZUJ67q3u5ov43P4ysjfwCWlCQfAwRS8gPKmvTvK+herA3IC4NyUvm+WlCzzH1IcSlAg+8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--dmatlack.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=OlUyOX4U; arc=none smtp.client-ip=209.85.210.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--dmatlack.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="OlUyOX4U" Received: by mail-pf1-f197.google.com with SMTP id d2e1a72fcca58-848568a6f62so483373b3a.0 for ; Tue, 28 Jul 2026 15:10:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1785276627; x=1785881427; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=eD4DOqSzYhDJFPWVLbqkFG2KNi5FrgpbXUF+ODWdEds=; b=OlUyOX4Ut8gHSj6itMAmnh8lkVvwAmVHtL5qo5fXAo1NwhfqUGqHOEk9mf7tqRZ+MZ P8R//S/3O2apG/5a65fZ8FfofiqOWO4AXsQRLfFU8ZTPMNGc+NGQqgqvJnfh2TK6cRgK qEc+yEt4Zmp851ZAlMEr6Ept0QwgkdcW4pRGSp5B42mRq9zCU+fj+99QwxqVg1CW3jMg vo23AoPVGVpf58e6oYDcKKUWMMke2uHQdddKzhP3I+RHkwKBtL1UdqiYt7J1FICcbLKz V0D9y0YjLV+eaNP6Y7EIYP1qGz1tHS0KWGDIXeBHGx5fiyMS4wRlbjIn/QXy+WodNmB1 DD9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785276627; x=1785881427; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=eD4DOqSzYhDJFPWVLbqkFG2KNi5FrgpbXUF+ODWdEds=; b=dGg7JaJ25o1AvhIDBC6zSuISaZ6dRjnlCR95KP3a1h84wrcGIwUromA4zGgiZYm4tB J3M/Fh/MVeIZ4qQcJJSDgm0VupWNKXZLIRKvN5DmFGVuuwAC/FRvj0LjF+Svr30AjH6H DP3ug0uTcT/JZ8zvxtYHaud5XxpMdpmS/cBZx0AwrJFy2iMHzdiz8JTLDjSMDA+fGszk AG/TSXDuEjQ7/PnZw+tSNzVadk2qlYUl4jrFSaZWjydHVN88AucF+G1aZL2qHFYqh8xm VN3pslqo7rG5gbWCJuHqo0JKD8PhyN140SGsSrDcwoUyFnu0zfKLApTxV19yrY1IKwk7 kPXw== X-Forwarded-Encrypted: i=1; AHgh+Ro+zt1wjgXe7v+gKWEfPUggd7DJXC61q45t1hgv3RphLvdpRNfMF8x4NwDlzf/Cms1pYYGuRpS89jBgtzk=@vger.kernel.org X-Gm-Message-State: AOJu0Ywx+SB6P3HhM7tCboUF5cEbk/SW6pgP2wi4Cs3m8U0Od7a8ZwZc tYOTv7W0vIlPlKxcTrQ5wy8HUe0yx7hchDutbdqNL/PE/ODIuOMWn7G5tbX1vg15/hlKbOhCI1i sIfLpx9H+o1I73Q== X-Received: from pfoa1.prod.google.com ([2002:aa7:8641:0:b0:845:ebfa:4051]) (user=dmatlack job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:23cb:b0:845:363e:12d9 with SMTP id d2e1a72fcca58-84e931f6a77mr4252240b3a.3.1785276626749; Tue, 28 Jul 2026 15:10:26 -0700 (PDT) Date: Tue, 28 Jul 2026 22:10:01 +0000 In-Reply-To: <20260728221007.2098560-1-dmatlack@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260728221007.2098560-1-dmatlack@google.com> X-Mailer: git-send-email 2.55.0.487.gaf234c4eb3-goog Message-ID: <20260728221007.2098560-8-dmatlack@google.com> Subject: [PATCH v8 07/12] PCI: Refactor matching logic for pci_dev_acs_ops From: David Matlack To: kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org Cc: Adithya Jayachandran , Alexander Graf , Alex Williamson , Bjorn Helgaas , Chris Li , David Matlack , David Rientjes , Jacob Pan , Jason Gunthorpe , Jonathan Corbet , Josh Hilke , Leon Romanovsky , Lukas Wunner , Mike Rapoport , Parav Pandit , Pasha Tatashin , Pranjal Shrivastava , Pratyush Yadav , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Vipin Sharma , William Tu , Yi Liu Content-Type: text/plain; charset="UTF-8" Refactor the logic to match devices to pci_dev_acs_ops by factoring out the device matching loop into its own routine, pci_dev_acs_ops_get(). This eliminates duplicate code between pci_dev_specific_enable_acs() and pci_dev_specific_disable_acs_redir(), and will also be used in a subsequent commit to check if a device requires device-specific enable_acs() during a Live Update. No functional change intended. Reviewed-by: Pranjal Shrivastava Reviewed-by: Pasha Tatashin Reviewed-by: Bjorn Helgaas Signed-off-by: David Matlack --- drivers/pci/quirks.c | 51 ++++++++++++++++++-------------------------- 1 file changed, 21 insertions(+), 30 deletions(-) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index b09f27f7846f..7ac39ec2843e 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5374,9 +5374,6 @@ static void pci_quirk_enable_intel_rp_mpc_acs(struct pci_dev *dev) */ static int pci_quirk_enable_intel_pch_acs(struct pci_dev *dev) { - if (!pci_quirk_intel_pch_acs_match(dev)) - return -ENOTTY; - if (pci_quirk_enable_intel_lpc_acs(dev)) { pci_warn(dev, "Failed to enable Intel PCH ACS quirk\n"); return 0; @@ -5396,9 +5393,6 @@ static int pci_quirk_enable_intel_spt_pch_acs(struct pci_dev *dev) int pos; u32 cap, ctrl; - if (!pci_quirk_intel_spt_pch_acs_match(dev)) - return -ENOTTY; - pos = dev->acs_cap; if (!pos) return -ENOTTY; @@ -5426,9 +5420,6 @@ static int pci_quirk_disable_intel_spt_pch_acs_redir(struct pci_dev *dev) int pos; u32 cap, ctrl; - if (!pci_quirk_intel_spt_pch_acs_match(dev)) - return -ENOTTY; - pos = dev->acs_cap; if (!pos) return -ENOTTY; @@ -5448,56 +5439,56 @@ static int pci_quirk_disable_intel_spt_pch_acs_redir(struct pci_dev *dev) static const struct pci_dev_acs_ops { u16 vendor; u16 device; + bool (*match)(struct pci_dev *dev); int (*enable_acs)(struct pci_dev *dev); int (*disable_acs_redir)(struct pci_dev *dev); } pci_dev_acs_ops[] = { { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, + .match = pci_quirk_intel_pch_acs_match, .enable_acs = pci_quirk_enable_intel_pch_acs, }, { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, + .match = pci_quirk_intel_spt_pch_acs_match, .enable_acs = pci_quirk_enable_intel_spt_pch_acs, .disable_acs_redir = pci_quirk_disable_intel_spt_pch_acs_redir, }, }; -int pci_dev_specific_enable_acs(struct pci_dev *dev) +static const struct pci_dev_acs_ops *pci_dev_acs_ops_get(struct pci_dev *dev) { const struct pci_dev_acs_ops *p; - int i, ret; + int i; for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) { p = &pci_dev_acs_ops[i]; if ((p->vendor == dev->vendor || p->vendor == (u16)PCI_ANY_ID) && (p->device == dev->device || - p->device == (u16)PCI_ANY_ID) && - p->enable_acs) { - ret = p->enable_acs(dev); - if (ret >= 0) - return ret; + p->device == (u16)PCI_ANY_ID)) { + if (!p->match || p->match(dev)) + return p; } } + return NULL; +} + +int pci_dev_specific_enable_acs(struct pci_dev *dev) +{ + const struct pci_dev_acs_ops *p = pci_dev_acs_ops_get(dev); + + if (p && p->enable_acs) + return p->enable_acs(dev); + return -ENOTTY; } int pci_dev_specific_disable_acs_redir(struct pci_dev *dev) { - const struct pci_dev_acs_ops *p; - int i, ret; + const struct pci_dev_acs_ops *p = pci_dev_acs_ops_get(dev); - for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) { - p = &pci_dev_acs_ops[i]; - if ((p->vendor == dev->vendor || - p->vendor == (u16)PCI_ANY_ID) && - (p->device == dev->device || - p->device == (u16)PCI_ANY_ID) && - p->disable_acs_redir) { - ret = p->disable_acs_redir(dev); - if (ret >= 0) - return ret; - } - } + if (p && p->disable_acs_redir) + return p->disable_acs_redir(dev); return -ENOTTY; } -- 2.55.0.487.gaf234c4eb3-goog