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cxl: Parse device tree and create cxl device(s) at boot
Add new entry point to scan the device tree at boot in a guest, looking for cxl devices. Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com> Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com> Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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1 changed files with 25 additions and 0 deletions
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@ -11,6 +11,7 @@
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#include <linux/rcupdate.h>
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#include <asm/errno.h>
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#include <misc/cxl-base.h>
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#include <linux/of_platform.h>
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#include "cxl.h"
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/* protected by rcu */
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@ -91,3 +92,27 @@ int cxl_update_properties(struct device_node *dn,
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return of_update_property(dn, new_prop);
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}
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EXPORT_SYMBOL_GPL(cxl_update_properties);
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static int __init cxl_base_init(void)
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{
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struct device_node *np = NULL;
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struct platform_device *dev;
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int count = 0;
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/*
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* Scan for compatible devices in guest only
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*/
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if (cpu_has_feature(CPU_FTR_HVMODE))
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return 0;
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while ((np = of_find_compatible_node(np, NULL,
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"ibm,coherent-platform-facility"))) {
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dev = of_platform_device_create(np, NULL, NULL);
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if (dev)
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count++;
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}
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pr_devel("Found %d cxl device(s)\n", count);
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return 0;
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}
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module_init(cxl_base_init);
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