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From 29f69ac618fd5ace9ed9aae7839b5cfdc1fb5130 Mon Sep 17 00:00:00 2001
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From: Shivaprasad G Bhat <sbhat@linux.ibm.com>
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Date: Wed, 1 Apr 2020 09:25:52 -0500
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Subject: [PATCH 16/65] devtree: Add capabilites to the OPAL Firmware
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On OpenPower systems, the presence of the "/ibm,opal" entry in the device tree
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signifies machines are running under OPAL firmware (i.e skiboot). Under this
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node OPAL exports certain available interfaces. And also this node have a
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compatible property listing "ibm,opal-v<X> which denotes the OPAL compatability.
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This change adds a function to parse information about those OPAL firmware
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capabilities and add it to skiboot firmware node. With a current OpenPower
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machine, we get something like this:
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*-firmware:0
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description: skiboot
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product: OPAL firmware
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physical id: 2
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version: 5.4.3-35bf9d9
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capabilities: opal-v2 opal-v3 prd ipmi
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Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>
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Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
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---
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src/core/device-tree.cc | 42 +++++++++++++++++++++++++++++++++++++++++
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1 file changed, 42 insertions(+)
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diff --git a/src/core/device-tree.cc b/src/core/device-tree.cc
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index af665a4..e7227e1 100644
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--- a/src/core/device-tree.cc
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+++ b/src/core/device-tree.cc
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@@ -219,11 +219,48 @@ static void scan_devtree_bootrom(hwNode & core)
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}
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}
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+static hwNode *add_base_opal_node(hwNode & core)
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+{
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+ vector < string >:: iterator it;
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+ vector < string > compat;
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+ string basepath = DEVICETREE "/ibm,opal";
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+ hwNode opal("firmware");
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+
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+ if (!exists(basepath))
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+ return NULL;
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+
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+ pushd(basepath);
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+
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+ opal.setProduct("OPAL firmware");
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+ opal.setDescription("skiboot");
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+
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+ compat = get_strings(basepath + "/compatible");
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+ for (it = compat.begin(); it != compat.end(); ++it) {
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+ if (matches(*it, "^ibm,opal-v"))
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+ opal.addCapability((*it).erase(0,4));
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+ }
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+
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+ if (exists(basepath + "/ipmi/compatible") &&
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+ matches(get_string(basepath + "/ipmi/compatible"), "^ibm,opal-ipmi"))
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+ opal.addCapability("ipmi");
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+
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+ if (exists(basepath + "/diagnostics/compatible") &&
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+ matches(get_string(basepath + "/diagnostics/compatible"), "^ibm,opal-prd"))
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+ opal.addCapability("prd");
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+
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+ popd();
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+
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+ opal.claim();
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+ return core.addChild(opal);
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+}
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+
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static void scan_devtree_firmware_powernv(hwNode & core)
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{
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int n;
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struct dirent **namelist;
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+ hwNode *opal = add_base_opal_node(core);
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+
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if (!exists(DEVICETREE "/ibm,firmware-versions"))
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return;
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@@ -245,6 +282,11 @@ static void scan_devtree_firmware_powernv(hwNode & core)
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fwnode.setDescription(sname);
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fwnode.setVersion(hw::strip(get_string(fullpath)));
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fwnode.claim();
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+ if (opal && sname == "skiboot") {
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+ opal->merge(fwnode);
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+ free(namelist[i]);
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+ continue;
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+ }
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core.addChild(fwnode);
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}
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free(namelist[i]);
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--
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2.33.1
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