[PATCHv3 5/5] x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf

[Kirill A. Shutemov]

MKTME_KEY_PROG allows to manipulate MKTME keys in the CPU.

Signed-off-by: Kirill A. Shutemov 
---
 arch/x86/include/asm/intel_pconfig.h | 50 
 1 file changed, 50 insertions(+)

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_ERROR2
+#define MKTME_INVALID_KEYID3
+#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 */
-- 
2.15.1

[PATCHv3 5/5] x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf

[Kirill A. Shutemov]

MKTME_KEY_PROG allows to manipulate MKTME keys in the CPU.

Signed-off-by: Kirill A. Shutemov 
---
 arch/x86/include/asm/intel_pconfig.h | 50 
 1 file changed, 50 insertions(+)

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_ERROR2
+#define MKTME_INVALID_KEYID3
+#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 */
-- 
2.15.1