From: Diana Craciun <diana.craciun@nxp.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Diana Craciun <diana.craciun@nxp.com>
Subject: [PATCH 10/11 v2] powerpc/fsl: Update Spectre v2 reporting
Date: Fri, 21 Dec 2018 19:30:36 +0200 [thread overview]
Message-ID: <1545413437-5538-11-git-send-email-diana.craciun@nxp.com> (raw)
In-Reply-To: <1545413437-5538-1-git-send-email-diana.craciun@nxp.com>
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 --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
next prev parent reply other threads:[~2018-12-21 17:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-21 17:30 [PATCH 00/11 v2] powerpc/fsl: NXP PowerPC Spectre variant 2 workarounds Diana Craciun
2018-12-21 17:30 ` [PATCH 01/11 v2] powerpc/fsl: Add infrastructure to fixup branch predictor flush Diana Craciun
2018-12-21 17:30 ` [PATCH 02/11 v2] powerpc/fsl: Add macro to flush the branch predictor Diana Craciun
2018-12-21 17:30 ` [PATCH 03/11 v2] powerpc/fsl: Fix spectre_v2 mitigations reporting Diana Craciun
2018-12-21 17:30 ` [PATCH 04/11 v2] powerpc/fsl: Emulate SPRN_BUCSR register Diana Craciun
2018-12-21 17:30 ` [PATCH 05/11 v2] powerpc/fsl: Add nospectre_v2 command line argument Diana Craciun
2018-12-21 17:30 ` [PATCH 06/11 v2] powerpc/fsl: Flush the branch predictor at each kernel entry (64bit) Diana Craciun
2018-12-21 17:30 ` [PATCH 07/11 v2] powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit) Diana Craciun
2018-12-21 17:30 ` [PATCH 08/11 v2] powerpc/fsl: Flush branch predictor when entering KVM Diana Craciun
2018-12-21 17:30 ` [PATCH 09/11 v2] powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used Diana Craciun
2018-12-21 17:30 ` Diana Craciun [this message]
2018-12-21 17:30 ` [PATCH 11/11 v2] powerpc/fsl: Add FSL_PPC_BOOK3E as supported arch for nospectre_v2 boot arg Diana Craciun
2018-12-22 10:07 ` [PATCH 00/11 v2] powerpc/fsl: NXP PowerPC Spectre variant 2 workarounds Michael Ellerman
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