From 7e8998466f6b0cfa410af94da41b18859d6379f2 Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Thu, 17 May 2018 18:28:26 +0530 Subject: soc/intel/common/block: Move cse common functions into block/cse This patch cleans soc/intel/{cnl, icl, tgl} by moving common soc code into common/block/cse. Supported SoC can select existing HECI_DISABLE_USING_SMM option to select common cse code block to make heci function disable using sideband interface during SMM mode at preboot envionment. BUG=b:78109109 TEST=Able to make HECI disable in SMM mode successfully without any hang or errors in CNL, ICL and TGL platform. Change-Id: I22a4cc05d3967c7653d2abe2c829b4876516d179 Signed-off-by: Subrata Banik Signed-off-by: Maulik V Vaghela Reviewed-on: https://review.coreboot.org/c/coreboot/+/26133 Reviewed-by: V Sowmya Reviewed-by: Furquan Shaikh Tested-by: build bot (Jenkins) --- src/soc/intel/common/block/cse/Kconfig | 8 +++ src/soc/intel/common/block/cse/Makefile.inc | 1 + src/soc/intel/common/block/cse/disable_heci.c | 62 ++++++++++++++++++++++ .../intel/common/block/include/intelblocks/cse.h | 2 + 4 files changed, 73 insertions(+) create mode 100644 src/soc/intel/common/block/cse/disable_heci.c (limited to 'src/soc/intel/common/block') diff --git a/src/soc/intel/common/block/cse/Kconfig b/src/soc/intel/common/block/cse/Kconfig index 321d34ce61..15de0b0536 100644 --- a/src/soc/intel/common/block/cse/Kconfig +++ b/src/soc/intel/common/block/cse/Kconfig @@ -4,3 +4,11 @@ config SOC_INTEL_COMMON_BLOCK_CSE help Driver for communication with Converged Security Engine (CSE) over Host Embedded Controller Interface (HECI) + +config SOC_INTEL_COMMON_BLOCK_HECI_DISABLE_IN_SMM + bool + default y if HECI_DISABLE_USING_SMM + select SOC_INTEL_COMMON_BLOCK_P2SB + help + Use this config to include common CSE block to make HECI function + disable in SMM mode diff --git a/src/soc/intel/common/block/cse/Makefile.inc b/src/soc/intel/common/block/cse/Makefile.inc index 376f00f715..90f76d59b0 100644 --- a/src/soc/intel/common/block/cse/Makefile.inc +++ b/src/soc/intel/common/block/cse/Makefile.inc @@ -1,3 +1,4 @@ bootblock-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c romstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c +smm-$(CONFIG_SOC_INTEL_COMMON_BLOCK_HECI_DISABLE_IN_SMM) += disable_heci.c diff --git a/src/soc/intel/common/block/cse/disable_heci.c b/src/soc/intel/common/block/cse/disable_heci.c new file mode 100644 index 0000000000..f560a37e9d --- /dev/null +++ b/src/soc/intel/common/block/cse/disable_heci.c @@ -0,0 +1,62 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2020 Intel Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CSME0_FBE 0xf +#define CSME0_BAR 0x0 +#define CSME0_FID 0xb0 + +/* Disable HECI using Sideband interface communication */ +void heci_disable(void) +{ + struct pcr_sbi_msg msg = { + .pid = PID_CSME0, + .offset = 0, + .opcode = PCR_WRITE, + .is_posted = false, + .fast_byte_enable = CSME0_FBE, + .bar = CSME0_BAR, + .fid = CSME0_FID + }; + /* Bit 0: Set to make HECI#1 Function disable */ + uint32_t data32 = 1; + uint8_t response; + int status; + + /* unhide p2sb device */ + p2sb_unhide(); + + /* Send SBI command to make HECI#1 function disable */ + status = pcr_execute_sideband_msg(&msg, &data32, &response); + if (status || response) + printk(BIOS_ERR, "Fail to make CSME function disable\n"); + + /* Ensure to Lock SBI interface after this command */ + p2sb_disable_sideband_access(); + + /* hide p2sb device */ + p2sb_hide(); +} diff --git a/src/soc/intel/common/block/include/intelblocks/cse.h b/src/soc/intel/common/block/include/intelblocks/cse.h index c597a3f46f..59ddc5b5d5 100644 --- a/src/soc/intel/common/block/include/intelblocks/cse.h +++ b/src/soc/intel/common/block/include/intelblocks/cse.h @@ -97,6 +97,8 @@ int heci_send_receive(const void *snd_msg, size_t snd_sz, void *rcv_msg, size_t * Returns 0 on failure and 1 on success. */ int heci_reset(void); +/* Disable HECI using Sideband interface communication */ +void heci_disable(void); /* Reads config value from a specified offset in the CSE PCI Config space. */ uint32_t me_read_config32(int offset); -- cgit v1.2.3