powerpc/pseries/vas: Don't print an error when VAS is unavailable

KVM does not support VAS so guests always print a useless error on boot

    vas: HCALL(398) error -2, query_type 0, result buffer 0x57f2000

Change this to only print the message if the error is not H_FUNCTION.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211126052133.1664375-1-npiggin@gmail.com

diff --git a/arch/powerpc/platforms/pseries/vas.c b/arch/powerpc/platforms/pseries/vas.c
index b043e39..734523e 100644 (file)
--- a/arch/powerpc/platforms/pseries/vas.c
+++ b/arch/powerpc/platforms/pseries/vas.c
@@ -151,8 +151,15 @@ int h_query_vas_capabilities(const u64 hcall, u8 query_type, u64 result)
        if (rc == H_SUCCESS)
                return 0;
 
-       pr_err("HCALL(%llx) error %ld, query_type %u, result buffer 0x%llx\n",
-                       hcall, rc, query_type, result);
+       /* H_FUNCTION means HV does not support VAS so don't print an error */
+       if (rc != H_FUNCTION) {
+               pr_err("%s error %ld, query_type %u, result buffer 0x%llx\n",
+                       (hcall == H_QUERY_VAS_CAPABILITIES) ?
+                               "H_QUERY_VAS_CAPABILITIES" :
+                               "H_QUERY_NX_CAPABILITIES",
+                       rc, query_type, result);
+       }
+
        return -EIO;
 }
 EXPORT_SYMBOL_GPL(h_query_vas_capabilities);