[PATCH 10/11] powerpc/fsl: Update Spectre v2 reporting
From: Diana Craciun <hidden>
Date: 2018-12-12 14:20:23
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Report branch predictor state flush as a mitigation for Spectre variant 2. Signed-off-by: Diana Craciun <redacted> --- arch/powerpc/kernel/security.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
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");
--
2.5.5