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| author | Christophe Lombard <clombard@linux.vnet.ibm.com> | 2016-03-04 11:26:36 (GMT) |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-03-09 12:36:52 (GMT) |
| commit | 14baf4d9c739e6e69150512d2eb23c71fffcc192 (patch) | |
| tree | 0ed05f5ee469c2933b49bbd53b6777b67f975fa2 /drivers/misc/cxl/main.c | |
| parent | cbffa3a5146a90f46806cef3a98b8be5833727e8 (diff) | |
| download | linux-14baf4d9c739e6e69150512d2eb23c71fffcc192.tar.xz | |
cxl: Add guest-specific code
The new of.c file contains code to parse the device tree to find out
about cxl adapters and AFUs.
guest.c implements the guest-specific callbacks for the backend API.
The process element ID is not known until the context is attached, so
we have to separate the context ID assigned by the cxl driver from the
process element ID visible to the user applications. In bare-metal,
the 2 IDs match.
Co-authored-by: Frederic Barrat <fbarrat@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>
[mpe: Fix SMP=n build, fix PSERIES=n build, minor whitespace fixes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl/main.c')
| -rw-r--r-- | drivers/misc/cxl/main.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c index 927ba5a..14b1583 100644 --- a/drivers/misc/cxl/main.c +++ b/drivers/misc/cxl/main.c @@ -285,9 +285,6 @@ static int __init init_cxl(void) { int rc = 0; - if (!cpu_has_feature(CPU_FTR_HVMODE)) - return -EPERM; - if ((rc = cxl_file_init())) return rc; @@ -296,8 +293,17 @@ static int __init init_cxl(void) if ((rc = register_cxl_calls(&cxl_calls))) goto err; - cxl_ops = &cxl_native_ops; - if ((rc = pci_register_driver(&cxl_pci_driver))) + if (cpu_has_feature(CPU_FTR_HVMODE)) { + cxl_ops = &cxl_native_ops; + rc = pci_register_driver(&cxl_pci_driver); + } +#ifdef CONFIG_PPC_PSERIES + else { + cxl_ops = &cxl_guest_ops; + rc = platform_driver_register(&cxl_of_driver); + } +#endif + if (rc) goto err1; return 0; @@ -312,7 +318,12 @@ err: static void exit_cxl(void) { - pci_unregister_driver(&cxl_pci_driver); + if (cpu_has_feature(CPU_FTR_HVMODE)) + pci_unregister_driver(&cxl_pci_driver); +#ifdef CONFIG_PPC_PSERIES + else + platform_driver_unregister(&cxl_of_driver); +#endif cxl_debugfs_exit(); cxl_file_exit(); |