From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932138AbeCEQak (ORCPT ); Mon, 5 Mar 2018 11:30:40 -0500 Received: from mga06.intel.com ([134.134.136.31]:14691 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752372AbeCEQ01 (ORCPT ); Mon, 5 Mar 2018 11:26:27 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,427,1515484800"; d="scan'208";a="34759445" From: "Kirill A. Shutemov" To: Ingo Molnar , x86@kernel.org, Thomas Gleixner , "H. Peter Anvin" , Tom Lendacky Cc: Dave Hansen , Kai Huang , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Subject: [RFC, PATCH 05/22] x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf Date: Mon, 5 Mar 2018 19:25:53 +0300 Message-Id: <20180305162610.37510-6-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180305162610.37510-1-kirill.shutemov@linux.intel.com> References: <20180305162610.37510-1-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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_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 */ -- 2.16.1