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MKTME_KEY_PROG allows to manipulate MKTME keys in the CPU. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Kai Huang <kai.huang@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180305162610.37510-6-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef _ASM_X86_INTEL_PCONFIG_H
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#define _ASM_X86_INTEL_PCONFIG_H
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#include <asm/asm.h>
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#include <asm/processor.h>
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enum pconfig_target {
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INVALID_TARGET = 0,
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MKTME_TARGET = 1,
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PCONFIG_TARGET_NR
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};
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int pconfig_target_supported(enum pconfig_target target);
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enum pconfig_leaf {
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MKTME_KEY_PROGRAM = 0,
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PCONFIG_LEAF_INVALID,
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};
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#define PCONFIG ".byte 0x0f, 0x01, 0xc5"
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/* Defines and structure for MKTME_KEY_PROGRAM of PCONFIG instruction */
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/* mktme_key_program::keyid_ctrl COMMAND, bits [7:0] */
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#define MKTME_KEYID_SET_KEY_DIRECT 0
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#define MKTME_KEYID_SET_KEY_RANDOM 1
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#define MKTME_KEYID_CLEAR_KEY 2
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#define MKTME_KEYID_NO_ENCRYPT 3
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/* mktme_key_program::keyid_ctrl ENC_ALG, bits [23:8] */
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#define MKTME_AES_XTS_128 (1 << 8)
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/* Return codes from the PCONFIG MKTME_KEY_PROGRAM */
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#define MKTME_PROG_SUCCESS 0
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#define MKTME_INVALID_PROG_CMD 1
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#define MKTME_ENTROPY_ERROR 2
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#define MKTME_INVALID_KEYID 3
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#define MKTME_INVALID_ENC_ALG 4
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#define MKTME_DEVICE_BUSY 5
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/* Hardware requires the structure to be 256 byte alinged. Otherwise #GP(0). */
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struct mktme_key_program {
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u16 keyid;
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u32 keyid_ctrl;
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u8 __rsvd[58];
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u8 key_field_1[64];
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u8 key_field_2[64];
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} __packed __aligned(256);
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static inline int mktme_key_program(struct mktme_key_program *key_program)
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{
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unsigned long rax = MKTME_KEY_PROGRAM;
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if (!pconfig_target_supported(MKTME_TARGET))
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return -ENXIO;
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asm volatile(PCONFIG
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: "=a" (rax), "=b" (key_program)
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: "0" (rax), "1" (key_program)
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: "memory", "cc");
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return rax;
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}
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#endif /* _ASM_X86_INTEL_PCONFIG_H */
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