diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-03-05 19:25:53 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-12 12:10:54 +0100 |
| commit | 24c517856af6511be1339dd55edd131160e37aac (patch) | |
| tree | 423f8edfaf7745f945205c074cffca066304ebf5 /arch | |
| parent | be7825c19b4866ddc7b1431740b69ede2eeb93c1 (diff) | |
x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/intel_pconfig.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/x86/include/asm/intel_pconfig.h b/arch/x86/include/asm/intel_pconfig.h index fb7a37c3798b..3cb002b1d0f9 100644 --- a/arch/x86/include/asm/intel_pconfig.h +++ b/arch/x86/include/asm/intel_pconfig.h @@ -12,4 +12,54 @@ enum pconfig_target { 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 */ |