diff mbox series

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

Message ID 1545413437-5538-11-git-send-email-diana.craciun@nxp.com (mailing list archive)
State Not Applicable
Headers show
Series powerpc/fsl: NXP PowerPC Spectre variant 2 workarounds | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch warning next/apply_patch Patch failed to apply
snowpatch_ozlabs/apply_patch fail Failed to apply to any branch

Commit Message

Diana Craciun Dec. 21, 2018, 5:30 p.m. UTC 
Report branch predictor state flush as a mitigation for
Spectre variant 2.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
---
v1-->v2
- no changes

 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");