SHIMADA Hirofumi [email protected]

/proc/cpuinfo にモロに insecure ちゅう features が現れるのか、やばそうである

SHIMADA Hirofumi [email protected]

Welcome to モォトォ。

SHIMADA Hirofumi [email protected]

x86の黒歴史が凝縮されているヘッダファイル https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/include/asm/cpufeatures.h?h=v4.15-rc6

SHIMADA Hirofumi [email protected]

あーーーーーこのリストに載っちゃえば本物のbugやな....

SHIMADA Hirofumi [email protected]

x86-cpufeatures--Add_X86_BUG_CPU_INSECURE.patch

@@ -340,5 +340,7 @@
#define X86_BUG_MONITOR X86_BUG(12) /* IPI required to wake up remote CPU */
#define X86_BUG_AMD_E400 X86_BUG(13) /* CPU is among the affected by Erratum 400 */
+#define X86_BUG_CPU_INSECURE X86_BUG(14) /* CPU is insecure and needs kernel page table isolation */
+#define X86_BUG_CPU_SECURE_MODE_KPTI X86_BUG(15) /* Kernel Page Table Isolation enabled*/

SHIMADA Hirofumi [email protected]

patchsetに60個入ってるてすげーな...

SHIMADA Hirofumi [email protected]

https://lkml.org/lkml/2017/12/4/709

SHIMADA Hirofumi [email protected]

:realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek: :realtek:

SHIMADA Hirofumi [email protected]

これで残務処理終わり

SHIMADA Hirofumi [email protected]

@nonaka 了解です。来年はmashiroのリニューアルを予定してますので、そこに +1万円僕が出す形で相殺できればとおもいます

SHIMADA Hirofumi [email protected]

ちょっとCPUごとのリプレースコスト計算してむたいねぇ

SHIMADA Hirofumi [email protected]

なるほど了解

SHIMADA Hirofumi [email protected]

@hashimom だ...

SHIMADA Hirofumi [email protected]

厳島で鹿焼き勢を観測

SHIMADA Hirofumi [email protected]

かぼりたい