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HV: enable SMEP in hypervisor

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- this patch is to enable SMEP in hypervisor, SMEP protects
   guests' memory from supervisor-mode instruction fetches,
   in other words, hypervisor which operating in supervisor
   mode can't fetch instructions from (guests' memory)
   linear addresses that are accessible in user mode.

Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
This commit is contained in:
Yonghua Huang
2018-06-14 18:22:51 +08:00
committed by Jack Ren
parent b2b49a64a9
commit 098c2e6788
4 changed files with 40 additions and 7 deletions
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2
hypervisor/include/arch/x86/cpu.h
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@@ -84,6 +84,8 @@
#define CR4_SMXE (1<<14) /* SMX enable */
#define CR4_PCIDE (1<<17) /* PCID enable */
#define CR4_OSXSAVE (1<<18)
#define CR4_SMEP (1<<20)
#define CR4_SMAP (1<<21)
/* XSAVE and Processor Extended States enable bit */