linux-kernel - [PATCH v4 3/5] ACPI/PCI: Ignore _OSC negotiation result if pcie_ports

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <969d4f083f445532bd1cdd98e3ce110574a461b0.1590534843.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Tue, 26 May 2020 16:18:27 -0700
From:   sathyanarayanan.kuppuswamy@...ux.intel.com
To:     bhelgaas@...gle.com
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        ashok.raj@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: [PATCH v4 3/5] ACPI/PCI: Ignore _OSC negotiation result if pcie_ports_native is set.

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>

pcie_ports_native is set only if user requests native handling
of PCIe capabilities via pcie_port_setup command line option.
User input takes precedence over _OSC based control negotiation
result. So consider the _OSC negotiated result only if
pcie_ports_native is unset.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
---
 drivers/acpi/pci_root.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 9e235c1a75ff..e0039ad3480a 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -914,18 +914,20 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
 		goto out_release_info;
 
 	host_bridge = to_pci_host_bridge(bus->bridge);
-	if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
-		host_bridge->native_pcie_hotplug = 0;
-	if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL))
-		host_bridge->native_shpc_hotplug = 0;
-	if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL))
-		host_bridge->native_aer = 0;
-	if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL))
-		host_bridge->native_pme = 0;
-	if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL))
-		host_bridge->native_ltr = 0;
-	if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL))
-		host_bridge->native_dpc = 0;
+	if (!pcie_ports_native) {
+		if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
+			host_bridge->native_pcie_hotplug = 0;
+		if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL))
+			host_bridge->native_shpc_hotplug = 0;
+		if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL))
+			host_bridge->native_aer = 0;
+		if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL))
+			host_bridge->native_pme = 0;
+		if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL))
+			host_bridge->native_ltr = 0;
+		if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL))
+			host_bridge->native_dpc = 0;
+	}
 
 	/*
 	 * Evaluate the "PCI Boot Configuration" _DSM Function.  If it
-- 
2.17.1