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kernel: support for Intel SMAP and SMEP on x86_64.

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SMAP will generated page faults when the kernel tries to access user pages unless overriden.
If SMAP is enabled, the override instructions are written where needed in memory with
binary "altcodepatches".
Support is enabled by default, might be disabled per safemode setting.

Change-Id: Ife26cd765056aeaf65b2ffa3cadd0dcf4e273a96
This commit is contained in:
Jérôme Duval
2018-01-30 20:05:39 +00:00
parent 43e75989a6
commit 9dd4d2dd05
19 changed files with 214 additions and 15 deletions
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headers/private/system/safemode_defs.h
+1
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@@ -12,6 +12,7 @@
#define B_SAFEMODE_DISABLE_ACPI "disable_acpi"
#define B_SAFEMODE_DISABLE_APIC "disable_apic"
#define B_SAFEMODE_ENABLE_X2APIC "enable_x2apic"
#define B_SAFEMODE_DISABLE_SMEP_SMAP "disable_smep_smap"
#define B_SAFEMODE_DISABLE_APM "disable_apm"
#define B_SAFEMODE_DISABLE_SMP "disable_smp"
#define B_SAFEMODE_DISABLE_HYPER_THREADING "disable_hyperthreading"