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x86/sgx: Expose SGX architectural definitions to the kernel

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Expose SGX architectural structures, as KVM will use many of the
architectural constants and structs to virtualize SGX.

Name the new header file as asm/sgx.h, rather than asm/sgx_arch.h, to
have single header to provide SGX facilities to share with other kernel
componments. Also update MAINTAINERS to include asm/sgx.h.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Co-developed-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Link: https://lkml.kernel.org/r/6bf47acd91ab4d709e66ad1692c7803e4c9063a0.1616136308.git.kai.huang@intel.com
This commit is contained in:
Sean Christopherson 2021-03-19 20:23:03 +13:00 committed by Borislav Petkov
parent faa7d3e6f3
commit 8ca52cc38d
5 changed files with 19 additions and 8 deletions
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1
MAINTAINERS
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@ -9274,6 +9274,7 @@ Q: https://patchwork.kernel.org/project/intel-sgx/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/sgx
F: Documentation/x86/sgx.rst
F: arch/x86/entry/vdso/vsgx.S
F: arch/x86/include/asm/sgx.h
F: arch/x86/include/uapi/asm/sgx.h
F: arch/x86/kernel/cpu/sgx/*
F: tools/testing/selftests/sgx/*

20
arch/x86/kernel/cpu/sgx/arch.h → arch/x86/include/asm/sgx.h
View File

@ -2,15 +2,20 @@
/**
* Copyright(c) 2016-20 Intel Corporation.
*
* Contains data structures defined by the SGX architecture. Data structures
* defined by the Linux software stack should not be placed here.
* Intel Software Guard Extensions (SGX) support.
*/
#ifndef _ASM_X86_SGX_ARCH_H
#define _ASM_X86_SGX_ARCH_H
#ifndef _ASM_X86_SGX_H
#define _ASM_X86_SGX_H
#include <linux/bits.h>
#include <linux/types.h>
/*
* This file contains both data structures defined by SGX architecture and Linux
* defined software data structures and functions. The two should not be mixed
* together for better readibility. The architectural definitions come first.
*/
/* The SGX specific CPUID function. */
#define SGX_CPUID 0x12
/* EPC enumeration. */
@ -337,4 +342,9 @@ struct sgx_sigstruct {
#define SGX_LAUNCH_TOKEN_SIZE 304
#endif /* _ASM_X86_SGX_ARCH_H */
/*
* Do not put any hardware-defined SGX structure representations below this
* comment!
*/
#endif /* _ASM_X86_SGX_H */

2
arch/x86/kernel/cpu/sgx/encl.c
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@ -7,7 +7,7 @@
#include <linux/shmem_fs.h>
#include <linux/suspend.h>
#include <linux/sched/mm.h>
#include "arch.h"
#include <asm/sgx.h>
#include "encl.h"
#include "encls.h"
#include "sgx.h"

2
arch/x86/kernel/cpu/sgx/sgx.h
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@ -8,7 +8,7 @@
#include <linux/rwsem.h>
#include <linux/types.h>
#include <asm/asm.h>
#include "arch.h"
#include <asm/sgx.h>
#undef pr_fmt
#define pr_fmt(fmt) "sgx: " fmt

2
tools/testing/selftests/sgx/defines.h
View File

@ -14,7 +14,7 @@
#define __aligned(x) __attribute__((__aligned__(x)))
#define __packed __attribute__((packed))
#include "../../../../arch/x86/kernel/cpu/sgx/arch.h"
#include "../../../../arch/x86/include/asm/sgx.h"
#include "../../../../arch/x86/include/asm/enclu.h"
#include "../../../../arch/x86/include/uapi/asm/sgx.h"