mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 06:04:14 +08:00
6c51ddddac
Reuse existing functionality from memdup_user() instead of keeping duplicate source code. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Brijesh Singh <brijesh.singh@amd.com> Acked-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
793 lines
19 KiB
C
793 lines
19 KiB
C
/*
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* AMD Platform Security Processor (PSP) interface
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*
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* Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
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*
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* Author: Brijesh Singh <brijesh.singh@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/kthread.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/spinlock_types.h>
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/delay.h>
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#include <linux/hw_random.h>
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#include <linux/ccp.h>
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#include "sp-dev.h"
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#include "psp-dev.h"
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#define DEVICE_NAME "sev"
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static DEFINE_MUTEX(sev_cmd_mutex);
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static struct sev_misc_dev *misc_dev;
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static struct psp_device *psp_master;
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static struct psp_device *psp_alloc_struct(struct sp_device *sp)
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{
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struct device *dev = sp->dev;
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struct psp_device *psp;
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psp = devm_kzalloc(dev, sizeof(*psp), GFP_KERNEL);
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if (!psp)
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return NULL;
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psp->dev = dev;
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psp->sp = sp;
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snprintf(psp->name, sizeof(psp->name), "psp-%u", sp->ord);
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return psp;
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}
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static irqreturn_t psp_irq_handler(int irq, void *data)
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{
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struct psp_device *psp = data;
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unsigned int status;
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int reg;
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/* Read the interrupt status: */
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status = ioread32(psp->io_regs + PSP_P2CMSG_INTSTS);
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/* Check if it is command completion: */
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if (!(status & BIT(PSP_CMD_COMPLETE_REG)))
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goto done;
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/* Check if it is SEV command completion: */
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reg = ioread32(psp->io_regs + PSP_CMDRESP);
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if (reg & PSP_CMDRESP_RESP) {
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psp->sev_int_rcvd = 1;
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wake_up(&psp->sev_int_queue);
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}
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done:
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/* Clear the interrupt status by writing the same value we read. */
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iowrite32(status, psp->io_regs + PSP_P2CMSG_INTSTS);
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return IRQ_HANDLED;
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}
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static void sev_wait_cmd_ioc(struct psp_device *psp, unsigned int *reg)
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{
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psp->sev_int_rcvd = 0;
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wait_event(psp->sev_int_queue, psp->sev_int_rcvd);
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*reg = ioread32(psp->io_regs + PSP_CMDRESP);
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}
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static int sev_cmd_buffer_len(int cmd)
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{
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switch (cmd) {
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case SEV_CMD_INIT: return sizeof(struct sev_data_init);
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case SEV_CMD_PLATFORM_STATUS: return sizeof(struct sev_user_data_status);
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case SEV_CMD_PEK_CSR: return sizeof(struct sev_data_pek_csr);
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case SEV_CMD_PEK_CERT_IMPORT: return sizeof(struct sev_data_pek_cert_import);
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case SEV_CMD_PDH_CERT_EXPORT: return sizeof(struct sev_data_pdh_cert_export);
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case SEV_CMD_LAUNCH_START: return sizeof(struct sev_data_launch_start);
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case SEV_CMD_LAUNCH_UPDATE_DATA: return sizeof(struct sev_data_launch_update_data);
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case SEV_CMD_LAUNCH_UPDATE_VMSA: return sizeof(struct sev_data_launch_update_vmsa);
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case SEV_CMD_LAUNCH_FINISH: return sizeof(struct sev_data_launch_finish);
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case SEV_CMD_LAUNCH_MEASURE: return sizeof(struct sev_data_launch_measure);
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case SEV_CMD_ACTIVATE: return sizeof(struct sev_data_activate);
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case SEV_CMD_DEACTIVATE: return sizeof(struct sev_data_deactivate);
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case SEV_CMD_DECOMMISSION: return sizeof(struct sev_data_decommission);
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case SEV_CMD_GUEST_STATUS: return sizeof(struct sev_data_guest_status);
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case SEV_CMD_DBG_DECRYPT: return sizeof(struct sev_data_dbg);
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case SEV_CMD_DBG_ENCRYPT: return sizeof(struct sev_data_dbg);
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case SEV_CMD_SEND_START: return sizeof(struct sev_data_send_start);
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case SEV_CMD_SEND_UPDATE_DATA: return sizeof(struct sev_data_send_update_data);
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case SEV_CMD_SEND_UPDATE_VMSA: return sizeof(struct sev_data_send_update_vmsa);
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case SEV_CMD_SEND_FINISH: return sizeof(struct sev_data_send_finish);
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case SEV_CMD_RECEIVE_START: return sizeof(struct sev_data_receive_start);
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case SEV_CMD_RECEIVE_FINISH: return sizeof(struct sev_data_receive_finish);
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case SEV_CMD_RECEIVE_UPDATE_DATA: return sizeof(struct sev_data_receive_update_data);
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case SEV_CMD_RECEIVE_UPDATE_VMSA: return sizeof(struct sev_data_receive_update_vmsa);
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case SEV_CMD_LAUNCH_UPDATE_SECRET: return sizeof(struct sev_data_launch_secret);
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default: return 0;
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}
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return 0;
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}
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static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret)
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{
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struct psp_device *psp = psp_master;
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unsigned int phys_lsb, phys_msb;
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unsigned int reg, ret = 0;
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if (!psp)
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return -ENODEV;
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/* Get the physical address of the command buffer */
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phys_lsb = data ? lower_32_bits(__psp_pa(data)) : 0;
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phys_msb = data ? upper_32_bits(__psp_pa(data)) : 0;
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dev_dbg(psp->dev, "sev command id %#x buffer 0x%08x%08x\n",
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cmd, phys_msb, phys_lsb);
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print_hex_dump_debug("(in): ", DUMP_PREFIX_OFFSET, 16, 2, data,
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sev_cmd_buffer_len(cmd), false);
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iowrite32(phys_lsb, psp->io_regs + PSP_CMDBUFF_ADDR_LO);
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iowrite32(phys_msb, psp->io_regs + PSP_CMDBUFF_ADDR_HI);
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reg = cmd;
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reg <<= PSP_CMDRESP_CMD_SHIFT;
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reg |= PSP_CMDRESP_IOC;
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iowrite32(reg, psp->io_regs + PSP_CMDRESP);
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/* wait for command completion */
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sev_wait_cmd_ioc(psp, ®);
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if (psp_ret)
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*psp_ret = reg & PSP_CMDRESP_ERR_MASK;
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if (reg & PSP_CMDRESP_ERR_MASK) {
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dev_dbg(psp->dev, "sev command %#x failed (%#010x)\n",
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cmd, reg & PSP_CMDRESP_ERR_MASK);
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ret = -EIO;
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}
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print_hex_dump_debug("(out): ", DUMP_PREFIX_OFFSET, 16, 2, data,
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sev_cmd_buffer_len(cmd), false);
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return ret;
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}
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static int sev_do_cmd(int cmd, void *data, int *psp_ret)
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{
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int rc;
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mutex_lock(&sev_cmd_mutex);
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rc = __sev_do_cmd_locked(cmd, data, psp_ret);
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mutex_unlock(&sev_cmd_mutex);
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return rc;
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}
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static int __sev_platform_init_locked(int *error)
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{
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struct psp_device *psp = psp_master;
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int rc = 0;
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if (!psp)
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return -ENODEV;
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if (psp->sev_state == SEV_STATE_INIT)
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return 0;
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rc = __sev_do_cmd_locked(SEV_CMD_INIT, &psp->init_cmd_buf, error);
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if (rc)
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return rc;
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psp->sev_state = SEV_STATE_INIT;
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dev_dbg(psp->dev, "SEV firmware initialized\n");
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return rc;
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}
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int sev_platform_init(int *error)
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{
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int rc;
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mutex_lock(&sev_cmd_mutex);
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rc = __sev_platform_init_locked(error);
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mutex_unlock(&sev_cmd_mutex);
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return rc;
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}
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EXPORT_SYMBOL_GPL(sev_platform_init);
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static int __sev_platform_shutdown_locked(int *error)
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{
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int ret;
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ret = __sev_do_cmd_locked(SEV_CMD_SHUTDOWN, NULL, error);
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if (ret)
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return ret;
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psp_master->sev_state = SEV_STATE_UNINIT;
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dev_dbg(psp_master->dev, "SEV firmware shutdown\n");
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return ret;
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}
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static int sev_platform_shutdown(int *error)
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{
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int rc;
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mutex_lock(&sev_cmd_mutex);
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rc = __sev_platform_shutdown_locked(NULL);
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mutex_unlock(&sev_cmd_mutex);
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return rc;
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}
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static int sev_get_platform_state(int *state, int *error)
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{
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int rc;
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rc = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS,
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&psp_master->status_cmd_buf, error);
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if (rc)
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return rc;
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*state = psp_master->status_cmd_buf.state;
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return rc;
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}
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static int sev_ioctl_do_reset(struct sev_issue_cmd *argp)
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{
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int state, rc;
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/*
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* The SEV spec requires that FACTORY_RESET must be issued in
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* UNINIT state. Before we go further lets check if any guest is
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* active.
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*
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* If FW is in WORKING state then deny the request otherwise issue
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* SHUTDOWN command do INIT -> UNINIT before issuing the FACTORY_RESET.
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*
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*/
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rc = sev_get_platform_state(&state, &argp->error);
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if (rc)
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return rc;
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if (state == SEV_STATE_WORKING)
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return -EBUSY;
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if (state == SEV_STATE_INIT) {
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rc = __sev_platform_shutdown_locked(&argp->error);
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if (rc)
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return rc;
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}
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return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, NULL, &argp->error);
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}
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static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp)
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{
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struct sev_user_data_status *data = &psp_master->status_cmd_buf;
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int ret;
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ret = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, data, &argp->error);
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if (ret)
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return ret;
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if (copy_to_user((void __user *)argp->data, data, sizeof(*data)))
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ret = -EFAULT;
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return ret;
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}
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static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp)
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{
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int rc;
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if (psp_master->sev_state == SEV_STATE_UNINIT) {
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rc = __sev_platform_init_locked(&argp->error);
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if (rc)
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return rc;
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}
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return __sev_do_cmd_locked(cmd, NULL, &argp->error);
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}
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static int sev_ioctl_do_pek_csr(struct sev_issue_cmd *argp)
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{
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struct sev_user_data_pek_csr input;
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struct sev_data_pek_csr *data;
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void *blob = NULL;
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int ret;
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if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
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return -EFAULT;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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/* userspace wants to query CSR length */
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if (!input.address || !input.length)
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goto cmd;
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/* allocate a physically contiguous buffer to store the CSR blob */
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if (!access_ok(VERIFY_WRITE, input.address, input.length) ||
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input.length > SEV_FW_BLOB_MAX_SIZE) {
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ret = -EFAULT;
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goto e_free;
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}
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blob = kmalloc(input.length, GFP_KERNEL);
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if (!blob) {
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ret = -ENOMEM;
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goto e_free;
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}
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data->address = __psp_pa(blob);
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data->len = input.length;
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cmd:
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if (psp_master->sev_state == SEV_STATE_UNINIT) {
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ret = __sev_platform_init_locked(&argp->error);
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if (ret)
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goto e_free_blob;
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}
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ret = __sev_do_cmd_locked(SEV_CMD_PEK_CSR, data, &argp->error);
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/* If we query the CSR length, FW responded with expected data. */
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input.length = data->len;
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if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) {
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ret = -EFAULT;
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goto e_free_blob;
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}
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if (blob) {
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if (copy_to_user((void __user *)input.address, blob, input.length))
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ret = -EFAULT;
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}
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e_free_blob:
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kfree(blob);
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e_free:
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kfree(data);
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return ret;
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}
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void *psp_copy_user_blob(u64 __user uaddr, u32 len)
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{
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if (!uaddr || !len)
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return ERR_PTR(-EINVAL);
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/* verify that blob length does not exceed our limit */
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if (len > SEV_FW_BLOB_MAX_SIZE)
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return ERR_PTR(-EINVAL);
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return memdup_user((void __user *)(uintptr_t)uaddr, len);
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}
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EXPORT_SYMBOL_GPL(psp_copy_user_blob);
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static int sev_ioctl_do_pek_import(struct sev_issue_cmd *argp)
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{
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struct sev_user_data_pek_cert_import input;
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struct sev_data_pek_cert_import *data;
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void *pek_blob, *oca_blob;
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int ret;
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if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
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return -EFAULT;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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/* copy PEK certificate blobs from userspace */
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pek_blob = psp_copy_user_blob(input.pek_cert_address, input.pek_cert_len);
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if (IS_ERR(pek_blob)) {
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ret = PTR_ERR(pek_blob);
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goto e_free;
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}
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data->pek_cert_address = __psp_pa(pek_blob);
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data->pek_cert_len = input.pek_cert_len;
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/* copy PEK certificate blobs from userspace */
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oca_blob = psp_copy_user_blob(input.oca_cert_address, input.oca_cert_len);
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if (IS_ERR(oca_blob)) {
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ret = PTR_ERR(oca_blob);
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goto e_free_pek;
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}
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data->oca_cert_address = __psp_pa(oca_blob);
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data->oca_cert_len = input.oca_cert_len;
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/* If platform is not in INIT state then transition it to INIT */
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if (psp_master->sev_state != SEV_STATE_INIT) {
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ret = __sev_platform_init_locked(&argp->error);
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if (ret)
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goto e_free_oca;
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}
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ret = __sev_do_cmd_locked(SEV_CMD_PEK_CERT_IMPORT, data, &argp->error);
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e_free_oca:
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kfree(oca_blob);
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e_free_pek:
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kfree(pek_blob);
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e_free:
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kfree(data);
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return ret;
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}
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static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp)
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{
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struct sev_user_data_pdh_cert_export input;
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void *pdh_blob = NULL, *cert_blob = NULL;
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struct sev_data_pdh_cert_export *data;
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int ret;
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if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
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return -EFAULT;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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/* Userspace wants to query the certificate length. */
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if (!input.pdh_cert_address ||
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!input.pdh_cert_len ||
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!input.cert_chain_address)
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goto cmd;
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/* Allocate a physically contiguous buffer to store the PDH blob. */
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if ((input.pdh_cert_len > SEV_FW_BLOB_MAX_SIZE) ||
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!access_ok(VERIFY_WRITE, input.pdh_cert_address, input.pdh_cert_len)) {
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ret = -EFAULT;
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goto e_free;
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}
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/* Allocate a physically contiguous buffer to store the cert chain blob. */
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if ((input.cert_chain_len > SEV_FW_BLOB_MAX_SIZE) ||
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!access_ok(VERIFY_WRITE, input.cert_chain_address, input.cert_chain_len)) {
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ret = -EFAULT;
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goto e_free;
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}
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pdh_blob = kmalloc(input.pdh_cert_len, GFP_KERNEL);
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if (!pdh_blob) {
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ret = -ENOMEM;
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goto e_free;
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}
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data->pdh_cert_address = __psp_pa(pdh_blob);
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data->pdh_cert_len = input.pdh_cert_len;
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cert_blob = kmalloc(input.cert_chain_len, GFP_KERNEL);
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if (!cert_blob) {
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ret = -ENOMEM;
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goto e_free_pdh;
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}
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data->cert_chain_address = __psp_pa(cert_blob);
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data->cert_chain_len = input.cert_chain_len;
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cmd:
|
|
/* If platform is not in INIT state then transition it to INIT. */
|
|
if (psp_master->sev_state != SEV_STATE_INIT) {
|
|
ret = __sev_platform_init_locked(&argp->error);
|
|
if (ret)
|
|
goto e_free_cert;
|
|
}
|
|
|
|
ret = __sev_do_cmd_locked(SEV_CMD_PDH_CERT_EXPORT, data, &argp->error);
|
|
|
|
/* If we query the length, FW responded with expected data. */
|
|
input.cert_chain_len = data->cert_chain_len;
|
|
input.pdh_cert_len = data->pdh_cert_len;
|
|
|
|
if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) {
|
|
ret = -EFAULT;
|
|
goto e_free_cert;
|
|
}
|
|
|
|
if (pdh_blob) {
|
|
if (copy_to_user((void __user *)input.pdh_cert_address,
|
|
pdh_blob, input.pdh_cert_len)) {
|
|
ret = -EFAULT;
|
|
goto e_free_cert;
|
|
}
|
|
}
|
|
|
|
if (cert_blob) {
|
|
if (copy_to_user((void __user *)input.cert_chain_address,
|
|
cert_blob, input.cert_chain_len))
|
|
ret = -EFAULT;
|
|
}
|
|
|
|
e_free_cert:
|
|
kfree(cert_blob);
|
|
e_free_pdh:
|
|
kfree(pdh_blob);
|
|
e_free:
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
|
|
static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
struct sev_issue_cmd input;
|
|
int ret = -EFAULT;
|
|
|
|
if (!psp_master)
|
|
return -ENODEV;
|
|
|
|
if (ioctl != SEV_ISSUE_CMD)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&input, argp, sizeof(struct sev_issue_cmd)))
|
|
return -EFAULT;
|
|
|
|
if (input.cmd > SEV_MAX)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&sev_cmd_mutex);
|
|
|
|
switch (input.cmd) {
|
|
|
|
case SEV_FACTORY_RESET:
|
|
ret = sev_ioctl_do_reset(&input);
|
|
break;
|
|
case SEV_PLATFORM_STATUS:
|
|
ret = sev_ioctl_do_platform_status(&input);
|
|
break;
|
|
case SEV_PEK_GEN:
|
|
ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PEK_GEN, &input);
|
|
break;
|
|
case SEV_PDH_GEN:
|
|
ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PDH_GEN, &input);
|
|
break;
|
|
case SEV_PEK_CSR:
|
|
ret = sev_ioctl_do_pek_csr(&input);
|
|
break;
|
|
case SEV_PEK_CERT_IMPORT:
|
|
ret = sev_ioctl_do_pek_import(&input);
|
|
break;
|
|
case SEV_PDH_CERT_EXPORT:
|
|
ret = sev_ioctl_do_pdh_export(&input);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd)))
|
|
ret = -EFAULT;
|
|
out:
|
|
mutex_unlock(&sev_cmd_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations sev_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = sev_ioctl,
|
|
};
|
|
|
|
int sev_platform_status(struct sev_user_data_status *data, int *error)
|
|
{
|
|
return sev_do_cmd(SEV_CMD_PLATFORM_STATUS, data, error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sev_platform_status);
|
|
|
|
int sev_guest_deactivate(struct sev_data_deactivate *data, int *error)
|
|
{
|
|
return sev_do_cmd(SEV_CMD_DEACTIVATE, data, error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sev_guest_deactivate);
|
|
|
|
int sev_guest_activate(struct sev_data_activate *data, int *error)
|
|
{
|
|
return sev_do_cmd(SEV_CMD_ACTIVATE, data, error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sev_guest_activate);
|
|
|
|
int sev_guest_decommission(struct sev_data_decommission *data, int *error)
|
|
{
|
|
return sev_do_cmd(SEV_CMD_DECOMMISSION, data, error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sev_guest_decommission);
|
|
|
|
int sev_guest_df_flush(int *error)
|
|
{
|
|
return sev_do_cmd(SEV_CMD_DF_FLUSH, NULL, error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sev_guest_df_flush);
|
|
|
|
static void sev_exit(struct kref *ref)
|
|
{
|
|
struct sev_misc_dev *misc_dev = container_of(ref, struct sev_misc_dev, refcount);
|
|
|
|
misc_deregister(&misc_dev->misc);
|
|
}
|
|
|
|
static int sev_misc_init(struct psp_device *psp)
|
|
{
|
|
struct device *dev = psp->dev;
|
|
int ret;
|
|
|
|
/*
|
|
* SEV feature support can be detected on multiple devices but the SEV
|
|
* FW commands must be issued on the master. During probe, we do not
|
|
* know the master hence we create /dev/sev on the first device probe.
|
|
* sev_do_cmd() finds the right master device to which to issue the
|
|
* command to the firmware.
|
|
*/
|
|
if (!misc_dev) {
|
|
struct miscdevice *misc;
|
|
|
|
misc_dev = devm_kzalloc(dev, sizeof(*misc_dev), GFP_KERNEL);
|
|
if (!misc_dev)
|
|
return -ENOMEM;
|
|
|
|
misc = &misc_dev->misc;
|
|
misc->minor = MISC_DYNAMIC_MINOR;
|
|
misc->name = DEVICE_NAME;
|
|
misc->fops = &sev_fops;
|
|
|
|
ret = misc_register(misc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
kref_init(&misc_dev->refcount);
|
|
} else {
|
|
kref_get(&misc_dev->refcount);
|
|
}
|
|
|
|
init_waitqueue_head(&psp->sev_int_queue);
|
|
psp->sev_misc = misc_dev;
|
|
dev_dbg(dev, "registered SEV device\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sev_init(struct psp_device *psp)
|
|
{
|
|
/* Check if device supports SEV feature */
|
|
if (!(ioread32(psp->io_regs + PSP_FEATURE_REG) & 1)) {
|
|
dev_dbg(psp->dev, "device does not support SEV\n");
|
|
return 1;
|
|
}
|
|
|
|
return sev_misc_init(psp);
|
|
}
|
|
|
|
int psp_dev_init(struct sp_device *sp)
|
|
{
|
|
struct device *dev = sp->dev;
|
|
struct psp_device *psp;
|
|
int ret;
|
|
|
|
ret = -ENOMEM;
|
|
psp = psp_alloc_struct(sp);
|
|
if (!psp)
|
|
goto e_err;
|
|
|
|
sp->psp_data = psp;
|
|
|
|
psp->vdata = (struct psp_vdata *)sp->dev_vdata->psp_vdata;
|
|
if (!psp->vdata) {
|
|
ret = -ENODEV;
|
|
dev_err(dev, "missing driver data\n");
|
|
goto e_err;
|
|
}
|
|
|
|
psp->io_regs = sp->io_map + psp->vdata->offset;
|
|
|
|
/* Disable and clear interrupts until ready */
|
|
iowrite32(0, psp->io_regs + PSP_P2CMSG_INTEN);
|
|
iowrite32(-1, psp->io_regs + PSP_P2CMSG_INTSTS);
|
|
|
|
/* Request an irq */
|
|
ret = sp_request_psp_irq(psp->sp, psp_irq_handler, psp->name, psp);
|
|
if (ret) {
|
|
dev_err(dev, "psp: unable to allocate an IRQ\n");
|
|
goto e_err;
|
|
}
|
|
|
|
ret = sev_init(psp);
|
|
if (ret)
|
|
goto e_irq;
|
|
|
|
if (sp->set_psp_master_device)
|
|
sp->set_psp_master_device(sp);
|
|
|
|
/* Enable interrupt */
|
|
iowrite32(-1, psp->io_regs + PSP_P2CMSG_INTEN);
|
|
|
|
return 0;
|
|
|
|
e_irq:
|
|
sp_free_psp_irq(psp->sp, psp);
|
|
e_err:
|
|
sp->psp_data = NULL;
|
|
|
|
dev_notice(dev, "psp initialization failed\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
void psp_dev_destroy(struct sp_device *sp)
|
|
{
|
|
struct psp_device *psp = sp->psp_data;
|
|
|
|
if (psp->sev_misc)
|
|
kref_put(&misc_dev->refcount, sev_exit);
|
|
|
|
sp_free_psp_irq(sp, psp);
|
|
}
|
|
|
|
int sev_issue_cmd_external_user(struct file *filep, unsigned int cmd,
|
|
void *data, int *error)
|
|
{
|
|
if (!filep || filep->f_op != &sev_fops)
|
|
return -EBADF;
|
|
|
|
return sev_do_cmd(cmd, data, error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sev_issue_cmd_external_user);
|
|
|
|
void psp_pci_init(void)
|
|
{
|
|
struct sev_user_data_status *status;
|
|
struct sp_device *sp;
|
|
int error, rc;
|
|
|
|
sp = sp_get_psp_master_device();
|
|
if (!sp)
|
|
return;
|
|
|
|
psp_master = sp->psp_data;
|
|
|
|
/* Initialize the platform */
|
|
rc = sev_platform_init(&error);
|
|
if (rc) {
|
|
dev_err(sp->dev, "SEV: failed to INIT error %#x\n", error);
|
|
goto err;
|
|
}
|
|
|
|
/* Display SEV firmware version */
|
|
status = &psp_master->status_cmd_buf;
|
|
rc = sev_platform_status(status, &error);
|
|
if (rc) {
|
|
dev_err(sp->dev, "SEV: failed to get status error %#x\n", error);
|
|
goto err;
|
|
}
|
|
|
|
dev_info(sp->dev, "SEV API:%d.%d build:%d\n", status->api_major,
|
|
status->api_minor, status->build);
|
|
return;
|
|
|
|
err:
|
|
psp_master = NULL;
|
|
}
|
|
|
|
void psp_pci_exit(void)
|
|
{
|
|
if (!psp_master)
|
|
return;
|
|
|
|
sev_platform_shutdown(NULL);
|
|
}
|