mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 06:36:46 +07:00
24c517856a
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>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
#ifndef _ASM_X86_INTEL_PCONFIG_H
|
|
#define _ASM_X86_INTEL_PCONFIG_H
|
|
|
|
#include <asm/asm.h>
|
|
#include <asm/processor.h>
|
|
|
|
enum pconfig_target {
|
|
INVALID_TARGET = 0,
|
|
MKTME_TARGET = 1,
|
|
PCONFIG_TARGET_NR
|
|
};
|
|
|
|
int pconfig_target_supported(enum pconfig_target target);
|
|
|
|
enum pconfig_leaf {
|
|
MKTME_KEY_PROGRAM = 0,
|
|
PCONFIG_LEAF_INVALID,
|
|
};
|
|
|
|
#define PCONFIG ".byte 0x0f, 0x01, 0xc5"
|
|
|
|
/* Defines and structure for MKTME_KEY_PROGRAM of PCONFIG instruction */
|
|
|
|
/* mktme_key_program::keyid_ctrl COMMAND, bits [7:0] */
|
|
#define MKTME_KEYID_SET_KEY_DIRECT 0
|
|
#define MKTME_KEYID_SET_KEY_RANDOM 1
|
|
#define MKTME_KEYID_CLEAR_KEY 2
|
|
#define MKTME_KEYID_NO_ENCRYPT 3
|
|
|
|
/* mktme_key_program::keyid_ctrl ENC_ALG, bits [23:8] */
|
|
#define MKTME_AES_XTS_128 (1 << 8)
|
|
|
|
/* Return codes from the PCONFIG MKTME_KEY_PROGRAM */
|
|
#define MKTME_PROG_SUCCESS 0
|
|
#define MKTME_INVALID_PROG_CMD 1
|
|
#define MKTME_ENTROPY_ERROR 2
|
|
#define MKTME_INVALID_KEYID 3
|
|
#define MKTME_INVALID_ENC_ALG 4
|
|
#define MKTME_DEVICE_BUSY 5
|
|
|
|
/* Hardware requires the structure to be 256 byte alinged. Otherwise #GP(0). */
|
|
struct mktme_key_program {
|
|
u16 keyid;
|
|
u32 keyid_ctrl;
|
|
u8 __rsvd[58];
|
|
u8 key_field_1[64];
|
|
u8 key_field_2[64];
|
|
} __packed __aligned(256);
|
|
|
|
static inline int mktme_key_program(struct mktme_key_program *key_program)
|
|
{
|
|
unsigned long rax = MKTME_KEY_PROGRAM;
|
|
|
|
if (!pconfig_target_supported(MKTME_TARGET))
|
|
return -ENXIO;
|
|
|
|
asm volatile(PCONFIG
|
|
: "=a" (rax), "=b" (key_program)
|
|
: "0" (rax), "1" (key_program)
|
|
: "memory", "cc");
|
|
|
|
return rax;
|
|
}
|
|
|
|
#endif /* _ASM_X86_INTEL_PCONFIG_H */
|