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From 6072c23dbd3bbdc9fead4d90fd2ea2212f2ae0cd Mon Sep 17 00:00:00 2001
From: Zhang Ning <ning.a.zhang@intel.com>
Date: Tue, 16 Apr 2019 15:45:05 +0800
Subject: [PATCH] x86/crtools: do not error when YMM is missing
for Intel Apollo Lake SOC, its cpuinfo and fpu features:
cpu: x86_family 6 x86_vendor_id GenuineIntel x86_model_id Intel(R) Celeron(R) CPU J3455 @ 1.50GHz
cpu: fpu: xfeatures_mask 0x11 xsave_size 1088 xsave_size_max 1088 xsaves_size 704
cpu: fpu: x87 floating point registers xstate_offsets 0 / 0 xstate_sizes 160 / 160
this CPU doesn't have AVX registers, YMM feature.
when CRIU runs on this CPU, it will report dump error:
Dumping GP/FPU registers for 4888
Error (criu/arch/x86/crtools.c:362): x86: Corruption in XFEATURE_YMM area (expected 64 but 0 obtained)
Error (criu/cr-dump.c:1278): Can't infect (pid: 4888) with parasite
that's because x86/crtools.c will still valid YMM xsave frame, thus fail to dump.
bypass unsupported feature, to make CRIU runs this kinds of CPUs.
Cc: Chen Hu <hu1.chen@intel.com>
Signed-off-by: Zhang Ning <ning.a.zhang@intel.com>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Upstream-Status: Backport [https://github.com/checkpoint-restore/criu/commit/5a52e34655636a8f00a664cf42716e1439ea2ef0]
Signed-off-by: Dengke Du <dengke.du@windriver.com>
---
criu/arch/x86/crtools.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/criu/arch/x86/crtools.c b/criu/arch/x86/crtools.c
index ee016da..efc23e5 100644
--- a/criu/arch/x86/crtools.c
+++ b/criu/arch/x86/crtools.c
@@ -354,7 +354,7 @@ static bool valid_xsave_frame(CoreEntry *core)
};
for (i = 0; i < ARRAY_SIZE(features); i++) {
- if (!features[i].ptr && i > 0)
+ if (!features[i].ptr)
continue;
if (features[i].expected > features[i].obtained) {
--
2.7.4
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