Commit 6ffdb491 authored by Elena Reshetova's avatar Elena Reshetova Committed by Dave Hansen
Browse files

x86/cpufeatures: Add X86_FEATURE_SGX_EUPDATESVN feature flag 



Add a flag indicating whenever ENCLS[EUPDATESVN] SGX instruction is
supported. This will be used by SGX driver to perform CPU SVN updates.

Signed-off-by: default avatarElena Reshetova <elena.reshetova@intel.com>
Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: default avatarKai Huang <kai.huang@intel.com>
Reviewed-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Tested-by: default avatarNataliia Bondarevska <bondarn@google.com>
parent 483fc19e

arch/x86/include/asm/cpufeatures.h

+1 −0
Original line number Diff line number Diff line
@@ -499,6 +499,7 @@ 
#define X86_FEATURE_IBPB_EXIT_TO_USER	(21*32+14) /* Use IBPB on exit-to-userspace, see VMSCAPE bug */

#define X86_FEATURE_ABMC		(21*32+15) /* Assignable Bandwidth Monitoring Counters */

#define X86_FEATURE_MSR_IMM		(21*32+16) /* MSR immediate form instructions */

#define X86_FEATURE_SGX_EUPDATESVN	(21*32+17) /* Support for ENCLS[EUPDATESVN] instruction */



/*

 * BUG word(s)

arch/x86/kernel/cpu/cpuid-deps.c

+1 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ static const struct cpuid_dep cpuid_deps[] = { 
	{ X86_FEATURE_SGX_LC,			X86_FEATURE_SGX	      },

	{ X86_FEATURE_SGX1,			X86_FEATURE_SGX       },

	{ X86_FEATURE_SGX2,			X86_FEATURE_SGX1      },

	{ X86_FEATURE_SGX_EUPDATESVN,		X86_FEATURE_SGX1      },

	{ X86_FEATURE_SGX_EDECCSSA,		X86_FEATURE_SGX1      },

	{ X86_FEATURE_XFD,			X86_FEATURE_XSAVES    },

	{ X86_FEATURE_XFD,			X86_FEATURE_XGETBV1   },

arch/x86/kernel/cpu/scattered.c

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ static const struct cpuid_bit cpuid_bits[] = { 
	{ X86_FEATURE_PER_THREAD_MBA,		CPUID_ECX,  0, 0x00000010, 3 },

	{ X86_FEATURE_SGX1,			CPUID_EAX,  0, 0x00000012, 0 },

	{ X86_FEATURE_SGX2,			CPUID_EAX,  1, 0x00000012, 0 },

	{ X86_FEATURE_SGX_EUPDATESVN,		CPUID_EAX, 10, 0x00000012, 0 },

	{ X86_FEATURE_SGX_EDECCSSA,		CPUID_EAX, 11, 0x00000012, 0 },

	{ X86_FEATURE_HW_PSTATE,		CPUID_EDX,  7, 0x80000007, 0 },

	{ X86_FEATURE_CPB,			CPUID_EDX,  9, 0x80000007, 0 },