diff options
| author | Nathan Lynch <nathanl@linux.ibm.com> | 2023-02-10 12:42:08 -0600 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-02-13 22:35:03 +1100 |
| commit | 08273c9f619cb32fb041935724f576e607101f3b (patch) | |
| tree | 49017ed6ba9e8a9dec74342d86a4fe425d6a3303 /arch/powerpc/platforms/pseries/pci.c | |
| parent | 716bfc97bd5fb7b442cdd06081f49df097f2e27b (diff) | |
powerpc/rtas: arch-wide function token lookup conversions
With the tokens for all implemented RTAS functions now available via
rtas_function_token(), which is optimal and safe for arbitrary
contexts, there is no need to use rtas_token() or cache its result.
Most conversions are trivial, but a few are worth describing in more
detail:
* Error injection token comparisons for lockdown purposes are
consolidated into a simple predicate: token_is_restricted_errinjct().
* A couple of special cases in block_rtas_call() do not use
rtas_token() but perform string comparisons against names in the
function table. These are converted to compare against token values
instead, which is logically equivalent but less expensive.
* The lookup for the ibm,os-term token can be deferred until needed,
instead of caching it at boot to avoid device tree traversal during
panic.
* Since rtas_function_token() accesses a read-only data structure
without taking any locks, xmon's lookup of set-indicator can be
performed as needed instead of cached at startup.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230125-b4-powerpc-rtas-queue-v3-20-26929c8cce78@linux.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/pseries/pci.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c index 6e671c3809ec..60e0a58928ef 100644 --- a/arch/powerpc/platforms/pseries/pci.c +++ b/arch/powerpc/platforms/pseries/pci.c @@ -60,7 +60,7 @@ static int pseries_send_map_pe(struct pci_dev *pdev, u16 num_vfs, struct pci_dn *pdn; int rc; unsigned long buid, addr; - int ibm_map_pes = rtas_token("ibm,open-sriov-map-pe-number"); + int ibm_map_pes = rtas_function_token(RTAS_FN_IBM_OPEN_SRIOV_MAP_PE_NUMBER); if (ibm_map_pes == RTAS_UNKNOWN_SERVICE) return -EINVAL; |