diff mbox series

[10/11] powerpc/fsl: Update Spectre v2 reporting

Message ID 1544623390-18710-11-git-send-email-diana.craciun@nxp.com (mailing list archive)
State Accepted
Commit dfa88658fb0583abb92e062c7a9cd5a5b94f2a46
Headers show
Series powerpc/fsl: NXP PowerPC Spectre variant 2 workarounds | expand

Checks

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snowpatch_ozlabs/apply_patch success next/apply_patch Successfully applied
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 12 lines checked

Commit Message

Diana Craciun Dec. 12, 2018, 2:03 p.m. UTC 
Report branch predictor state flush as a mitigation for
Spectre variant 2.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
---
 arch/powerpc/kernel/security.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 4393a38..861fab3 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -212,8 +212,11 @@  ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, c
 
 		if (count_cache_flush_type == COUNT_CACHE_FLUSH_HW)
 			seq_buf_printf(&s, "(hardware accelerated)");
-	} else
+	} else if (btb_flush_enabled) {
+		seq_buf_printf(&s, "Mitigation: Branch predictor state flush");
+	} else {
 		seq_buf_printf(&s, "Vulnerable");
+	}
 
 	seq_buf_printf(&s, "\n");