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authorMauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>2018-06-02 21:08:52 +1000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-06-06 16:44:35 +0200
commit2b2f103b689bb1f092ccbc5f03ce5ec77d319319 (patch)
tree928b06d8101e02d13810b9589193c1ea282023a2 /arch
parent135b2c17cf252f539103fb4781133058be83a710 (diff)
powerpc/rfi-flush: Differentiate enabled and patched flush types
commit 0063d61ccfc011f379a31acaeba6de7c926fed2c upstream. Currently the rfi-flush messages print 'Using <type> flush' for all enabled_flush_types, but that is not necessarily true -- as now the fallback flush is always enabled on pseries, but the fixup function overwrites its nop/branch slot with other flush types, if available. So, replace the 'Using <type> flush' messages with '<type> flush is available'. Also, print the patched flush types in the fixup function, so users can know what is (not) being used (e.g., the slower, fallback flush, or no flush type at all if flush is disabled via the debugfs switch). Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/setup_64.c6
-rw-r--r--arch/powerpc/lib/feature-fixups.c9
2 files changed, 11 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 568793009daa..eaa6039edddc 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -755,15 +755,15 @@ static void init_fallback_flush(void)
void setup_rfi_flush(enum l1d_flush_type types, bool enable)
{
if (types & L1D_FLUSH_FALLBACK) {
- pr_info("rfi-flush: Using fallback displacement flush\n");
+ pr_info("rfi-flush: fallback displacement flush available\n");
init_fallback_flush();
}
if (types & L1D_FLUSH_ORI)
- pr_info("rfi-flush: Using ori type flush\n");
+ pr_info("rfi-flush: ori type flush available\n");
if (types & L1D_FLUSH_MTTRIG)
- pr_info("rfi-flush: Using mttrig type flush\n");
+ pr_info("rfi-flush: mttrig type flush available\n");
enabled_flush_types = types;
diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
index 46c8338a61bc..d89d54fa6acc 100644
--- a/arch/powerpc/lib/feature-fixups.c
+++ b/arch/powerpc/lib/feature-fixups.c
@@ -153,7 +153,14 @@ void do_rfi_flush_fixups(enum l1d_flush_type types)
patch_instruction(dest + 2, instrs[2]);
}
- printk(KERN_DEBUG "rfi-flush: patched %d locations\n", i);
+ printk(KERN_DEBUG "rfi-flush: patched %d locations (%s flush)\n", i,
+ (types == L1D_FLUSH_NONE) ? "no" :
+ (types == L1D_FLUSH_FALLBACK) ? "fallback displacement" :
+ (types & L1D_FLUSH_ORI) ? (types & L1D_FLUSH_MTTRIG)
+ ? "ori+mttrig type"
+ : "ori type" :
+ (types & L1D_FLUSH_MTTRIG) ? "mttrig type"
+ : "unknown");
}
#endif /* CONFIG_PPC_BOOK3S_64 */