The Secure Encrypted Virtualization (SEV) interface allows the memory
contents of a virtual machine (VM) to be transparently encrypted with
a key unique to the guest.
The interface provides:
- /dev/sev device and ioctl (SEV_ISSUE_CMD) to execute the platform
provisioning commands from the userspace.
- in-kernel API's to encrypt the guest memory region. The in-kernel APIs
will be used by KVM to bootstrap and debug the SEV guest.
SEV key management spec is available here [1]
[1] http://support.amd.com/TechDocs/55766_SEV-KM%20API_Specification.pdf
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
---
drivers/crypto/ccp/Kconfig | 7
drivers/crypto/ccp/Makefile | 1
drivers/crypto/ccp/psp-dev.h | 6
drivers/crypto/ccp/sev-dev.c | 348 ++++++++++++++++++++++
drivers/crypto/ccp/sev-dev.h | 67 ++++
drivers/crypto/ccp/sev-ops.c | 324 ++++++++++++++++++++
include/linux/psp-sev.h | 672 ++++++++++++++++++++++++++++++++++++++++++
include/uapi/linux/Kbuild | 1
include/uapi/linux/psp-sev.h | 123 ++++++++
9 files changed, 1546 insertions(+), 3 deletions(-)
create mode 100644 drivers/crypto/ccp/sev-dev.c
create mode 100644 drivers/crypto/ccp/sev-dev.h
create mode 100644 drivers/crypto/ccp/sev-ops.c
create mode 100644 include/linux/psp-sev.h
create mode 100644 include/uapi/linux/psp-sev.h
diff --git a/drivers/crypto/ccp/Kconfig b/drivers/crypto/ccp/Kconfig
index 59c207e..67d1917 100644
--- a/drivers/crypto/ccp/Kconfig
+++ b/drivers/crypto/ccp/Kconfig
@@ -41,4 +41,11 @@ config CRYPTO_DEV_PSP
help
Provide the interface for AMD Platform Security Processor (PSP) device.
+config CRYPTO_DEV_SEV
+ bool "Secure Encrypted Virtualization (SEV) interface"
+ default y
+ help
+ Provide the kernel and userspace (/dev/sev) interface to issue the
+ Secure Encrypted Virtualization (SEV) commands.
+
endif
diff --git a/drivers/crypto/ccp/Makefile b/drivers/crypto/ccp/Makefile
index 12e569d..4c4e77e 100644
--- a/drivers/crypto/ccp/Makefile
+++ b/drivers/crypto/ccp/Makefile
@@ -7,6 +7,7 @@ ccp-$(CONFIG_CRYPTO_DEV_CCP) += ccp-dev.o \
ccp-dev-v5.o \
ccp-dmaengine.o
ccp-$(CONFIG_CRYPTO_DEV_PSP) += psp-dev.o
+ccp-$(CONFIG_CRYPTO_DEV_SEV) += sev-dev.o sev-ops.o
obj-$(CONFIG_CRYPTO_DEV_CCP_CRYPTO) += ccp-crypto.o
ccp-crypto-objs := ccp-crypto-main.o \
diff --git a/drivers/crypto/ccp/psp-dev.h b/drivers/crypto/ccp/psp-dev.h
index bbd3d96..fd67b14 100644
--- a/drivers/crypto/ccp/psp-dev.h
+++ b/drivers/crypto/ccp/psp-dev.h
@@ -70,14 +70,14 @@ int psp_free_sev_irq(struct psp_device *psp, void *data);
struct psp_device *psp_get_master_device(void);
-#ifdef CONFIG_AMD_SEV
+#ifdef CONFIG_CRYPTO_DEV_SEV
int sev_dev_init(struct psp_device *psp);
void sev_dev_destroy(struct psp_device *psp);
int sev_dev_resume(struct psp_device *psp);
int sev_dev_suspend(struct psp_device *psp, pm_message_t state);
-#else
+#else /* !CONFIG_CRYPTO_DEV_SEV */
static inline int sev_dev_init(struct psp_device *psp)
{
@@ -96,7 +96,7 @@ static inline int sev_dev_suspend(struct psp_device *psp, pm_message_t state)
return -ENODEV;
}
-#endif /* __AMD_SEV_H */
+#endif /* CONFIG_CRYPTO_DEV_SEV */
#endif /* __PSP_DEV_H */
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
new file mode 100644
index 0000000..a67e2d7
--- /dev/null
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -0,0 +1,348 @@
+/*
+ * AMD Secure Encrypted Virtualization (SEV) interface
+ *
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/spinlock_types.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/jiffies.h>
+
+#include "psp-dev.h"
+#include "sev-dev.h"
+
+extern struct file_operations sev_fops;
+
+static LIST_HEAD(sev_devs);
+static DEFINE_SPINLOCK(sev_devs_lock);
+static atomic_t sev_id;
+
+static unsigned int psp_poll;
+module_param(psp_poll, uint, 0444);
+MODULE_PARM_DESC(psp_poll, "Poll for sev command completion - any non-zero value");
+
+DEFINE_MUTEX(sev_cmd_mutex);
+
+void sev_add_device(struct sev_device *sev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sev_devs_lock, flags);
+
+ list_add_tail(&sev->entry, &sev_devs);
+
+ spin_unlock_irqrestore(&sev_devs_lock, flags);
+}
+
+void sev_del_device(struct sev_device *sev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sev_devs_lock, flags);
+
+ list_del(&sev->entry);
+ spin_unlock_irqrestore(&sev_devs_lock, flags);
+}
+
+static struct sev_device *get_sev_master_device(void)
+{
+ struct psp_device *psp = psp_get_master_device();
+
+ return psp ? psp->sev_data : NULL;
+}
+
+static int sev_wait_cmd_poll(struct sev_device *sev, unsigned int timeout,
+ unsigned int *reg)
+{
+ int wait = timeout * 10; /* 100ms sleep => timeout * 10 */
+
+ while (--wait) {
+ msleep(100);
+
+ *reg = ioread32(sev->io_regs + PSP_CMDRESP);
+ if (*reg & PSP_CMDRESP_RESP)
+ break;
+ }
+
+ if (!wait) {
+ dev_err(sev->dev, "sev command timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int sev_wait_cmd_ioc(struct sev_device *sev, unsigned int timeout,
+ unsigned int *reg)
+{
+ unsigned long jiffie_timeout = timeout;
+ long ret;
+
+ jiffie_timeout *= HZ;
+
+ sev->int_rcvd = 0;
+
+ ret = wait_event_interruptible_timeout(sev->int_queue, sev->int_rcvd,
+ jiffie_timeout);
+ if (ret <= 0) {
+ dev_err(sev->dev, "sev command (%#x) timed out\n",
+ *reg >> PSP_CMDRESP_CMD_SHIFT);
+ return -ETIMEDOUT;
+ }
+
+ *reg = ioread32(sev->io_regs + PSP_CMDRESP);
+
+ return 0;
+}
+
+static int sev_wait_cmd(struct sev_device *sev, unsigned int timeout,
+ unsigned int *reg)
+{
+ return (*reg & PSP_CMDRESP_IOC) ? sev_wait_cmd_ioc(sev, timeout, reg)
+ : sev_wait_cmd_poll(sev, timeout, reg);
+}
+
+static struct sev_device *sev_alloc_struct(struct psp_device *psp)
+{
+ struct device *dev = psp->dev;
+ struct sev_device *sev;
+
+ sev = devm_kzalloc(dev, sizeof(*sev), GFP_KERNEL);
+ if (!sev)
+ return NULL;
+
+ sev->dev = dev;
+ sev->psp = psp;
+ sev->id = atomic_inc_return(&sev_id);
+
+ snprintf(sev->name, sizeof(sev->name), "sev%u", sev->id);
+ init_waitqueue_head(&sev->int_queue);
+
+ return sev;
+}
+
+irqreturn_t sev_irq_handler(int irq, void *data)
+{
+ struct sev_device *sev = data;
+ unsigned int status;
+
+ status = ioread32(sev->io_regs + PSP_P2CMSG_INTSTS);
+ if (status & (1 << PSP_CMD_COMPLETE_REG)) {
+ int reg;
+
+ reg = ioread32(sev->io_regs + PSP_CMDRESP);
+ if (reg & PSP_CMDRESP_RESP) {
+ sev->int_rcvd = 1;
+ wake_up_interruptible(&sev->int_queue);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static bool check_sev_support(struct sev_device *sev)
+{
+ /* Bit 0 in PSP_FEATURE_REG is set then SEV is support in PSP */
+ if (ioread32(sev->io_regs + PSP_FEATURE_REG) & 1)
+ return true;
+
+ return false;
+}
+
+int sev_dev_init(struct psp_device *psp)
+{
+ struct device *dev = psp->dev;
+ struct sev_device *sev;
+ int ret;
+
+ ret = -ENOMEM;
+ sev = sev_alloc_struct(psp);
+ if (!sev)
+ goto e_err;
+ psp->sev_data = sev;
+
+ sev->io_regs = psp->io_regs;
+
+ dev_dbg(dev, "checking SEV support ...\n");
+ /* check SEV support */
+ if (!check_sev_support(sev)) {
+ dev_dbg(dev, "device does not support SEV\n");
+ goto e_err;
+ }
+
+ dev_dbg(dev, "requesting an IRQ ...\n");
+ /* Request an irq */
+ ret = psp_request_sev_irq(sev->psp, sev_irq_handler, sev);
+ if (ret) {
+ dev_err(dev, "unable to allocate an IRQ\n");
+ goto e_err;
+ }
+
+ /* initialize SEV ops */
+ dev_dbg(dev, "init sev ops\n");
+ ret = sev_ops_init(sev);
+ if (ret) {
+ dev_err(dev, "failed to init sev ops\n");
+ goto e_irq;
+ }
+
+ sev_add_device(sev);
+
+ dev_notice(dev, "sev enabled\n");
+
+ return 0;
+
+e_irq:
+ psp_free_sev_irq(psp, sev);
+e_err:
+ psp->sev_data = NULL;
+
+ dev_notice(dev, "sev initialization failed\n");
+
+ return ret;
+}
+
+void sev_dev_destroy(struct psp_device *psp)
+{
+ struct sev_device *sev = psp->sev_data;
+
+ psp_free_sev_irq(psp, sev);
+
+ sev_ops_destroy(sev);
+
+ sev_del_device(sev);
+}
+
+int sev_dev_resume(struct psp_device *psp)
+{
+ return 0;
+}
+
+int sev_dev_suspend(struct psp_device *psp, pm_message_t state)
+{
+ return 0;
+}
+
+int sev_issue_cmd(int cmd, void *data, unsigned int timeout, int *psp_ret)
+{
+ struct sev_device *sev = get_sev_master_device();
+ unsigned int phys_lsb, phys_msb;
+ unsigned int reg, ret;
+
+ if (!sev)
+ return -ENODEV;
+
+ if (psp_ret)
+ *psp_ret = 0;
+
+ /* Set the physical address for the PSP */
+ phys_lsb = data ? lower_32_bits(__psp_pa(data)) : 0;
+ phys_msb = data ? upper_32_bits(__psp_pa(data)) : 0;
+
+ dev_dbg(sev->dev, "sev command id %#x buffer 0x%08x%08x\n",
+ cmd, phys_msb, phys_lsb);
+
+ /* Only one command at a time... */
+ mutex_lock(&sev_cmd_mutex);
+
+ iowrite32(phys_lsb, sev->io_regs + PSP_CMDBUFF_ADDR_LO);
+ iowrite32(phys_msb, sev->io_regs + PSP_CMDBUFF_ADDR_HI);
+ wmb();
+
+ reg = cmd;
+ reg <<= PSP_CMDRESP_CMD_SHIFT;
+ reg |= psp_poll ? 0 : PSP_CMDRESP_IOC;
+ iowrite32(reg, sev->io_regs + PSP_CMDRESP);
+
+ ret = sev_wait_cmd(sev, timeout, ®);
+ if (ret)
+ goto unlock;
+
+ if (psp_ret)
+ *psp_ret = reg & PSP_CMDRESP_ERR_MASK;
+
+ if (reg & PSP_CMDRESP_ERR_MASK) {
+ dev_dbg(sev->dev, "sev command %u failed (%#010x)\n",
+ cmd, reg & PSP_CMDRESP_ERR_MASK);
+ ret = -EIO;
+ }
+
+unlock:
+ mutex_unlock(&sev_cmd_mutex);
+
+ return ret;
+}
+
+int sev_platform_init(struct sev_data_init *data, int *error)
+{
+ return sev_issue_cmd(SEV_CMD_INIT, data, SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_platform_init);
+
+int sev_platform_shutdown(int *error)
+{
+ return sev_issue_cmd(SEV_CMD_SHUTDOWN, 0, SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_platform_shutdown);
+
+int sev_platform_status(struct sev_data_status *data, int *error)
+{
+ return sev_issue_cmd(SEV_CMD_PLATFORM_STATUS, data,
+ SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_platform_status);
+
+int sev_issue_cmd_external_user(struct file *filep, unsigned int cmd,
+ void *data, int timeout, int *error)
+{
+ if (!filep || filep->f_op != &sev_fops)
+ return -EBADF;
+
+ return sev_issue_cmd(cmd, data,
+ timeout ? timeout : SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_issue_cmd_external_user);
+
+int sev_guest_deactivate(struct sev_data_deactivate *data, int *error)
+{
+ return sev_issue_cmd(SEV_CMD_DEACTIVATE, data,
+ SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_guest_deactivate);
+
+int sev_guest_activate(struct sev_data_activate *data, int *error)
+{
+ return sev_issue_cmd(SEV_CMD_ACTIVATE, data,
+ SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_guest_activate);
+
+int sev_guest_decommission(struct sev_data_decommission *data, int *error)
+{
+ return sev_issue_cmd(SEV_CMD_DECOMMISSION, data,
+ SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_guest_decommission);
+
+int sev_guest_df_flush(int *error)
+{
+ return sev_issue_cmd(SEV_CMD_DF_FLUSH, 0,
+ SEV_DEFAULT_TIMEOUT, error);
+}
+EXPORT_SYMBOL_GPL(sev_guest_df_flush);
+
diff --git a/drivers/crypto/ccp/sev-dev.h b/drivers/crypto/ccp/sev-dev.h
new file mode 100644
index 0000000..0df6ead
--- /dev/null
+++ b/drivers/crypto/ccp/sev-dev.h
@@ -0,0 +1,67 @@
+/*
+ * AMD Secure Encrypted Virtualization (SEV) interface
+ *
+ * Copyright (C) 2013,2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __SEV_DEV_H__
+#define __SEV_DEV_H__
+
+#include <linux/device.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
+#include <linux/miscdevice.h>
+
+#include <linux/psp-sev.h>
+
+#define PSP_C2PMSG(_num) ((_num) << 2)
+#define PSP_CMDRESP PSP_C2PMSG(32)
+#define PSP_CMDBUFF_ADDR_LO PSP_C2PMSG(56)
+#define PSP_CMDBUFF_ADDR_HI PSP_C2PMSG(57)
+#define PSP_FEATURE_REG PSP_C2PMSG(63)
+
+#define PSP_P2CMSG(_num) (_num << 2)
+#define PSP_CMD_COMPLETE_REG 1
+#define PSP_CMD_COMPLETE PSP_P2CMSG(PSP_CMD_COMPLETE_REG)
+
+#define MAX_PSP_NAME_LEN 16
+#define SEV_DEFAULT_TIMEOUT 5
+
+struct sev_device {
+ struct list_head entry;
+
+ struct dentry *debugfs;
+ struct miscdevice misc;
+
+ unsigned int id;
+ char name[MAX_PSP_NAME_LEN];
+
+ struct device *dev;
+ struct sp_device *sp;
+ struct psp_device *psp;
+
+ void __iomem *io_regs;
+
+ unsigned int int_rcvd;
+ wait_queue_head_t int_queue;
+};
+
+void sev_add_device(struct sev_device *sev);
+void sev_del_device(struct sev_device *sev);
+
+int sev_ops_init(struct sev_device *sev);
+void sev_ops_destroy(struct sev_device *sev);
+
+int sev_issue_cmd(int cmd, void *data, unsigned int timeout, int *error);
+
+#endif /* __SEV_DEV_H */
diff --git a/drivers/crypto/ccp/sev-ops.c b/drivers/crypto/ccp/sev-ops.c
new file mode 100644
index 0000000..727a8db
--- /dev/null
+++ b/drivers/crypto/ccp/sev-ops.c
@@ -0,0 +1,324 @@
+/*
+ * AMD Secure Encrypted Virtualization (SEV) command interface
+ *
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/spinlock_types.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+
+#include <uapi/linux/psp-sev.h>
+
+#include "psp-dev.h"
+#include "sev-dev.h"
+
+static int sev_ioctl_init(struct sev_issue_cmd *argp)
+{
+ int ret;
+ struct sev_data_init *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ret = sev_platform_init(data, &argp->error);
+
+ kfree(data);
+ return ret;
+}
+
+static int sev_ioctl_platform_status(struct sev_issue_cmd *argp)
+{
+ int ret;
+ struct sev_data_status *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ret = sev_platform_status(data, &argp->error);
+
+ if (copy_to_user((void *)argp->data, data, sizeof(*data)))
+ ret = -EFAULT;
+
+ kfree(data);
+ return ret;
+}
+
+static int sev_ioctl_pek_csr(struct sev_issue_cmd *argp)
+{
+ int ret;
+ void *csr_addr = NULL;
+ struct sev_data_pek_csr *data;
+ struct sev_user_data_pek_csr input;
+
+ if (copy_from_user(&input, (void *)argp->data,
+ sizeof(struct sev_user_data_pek_csr)))
+ return -EFAULT;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ /* copy PEK certificate from userspace */
+ if (input.address && input.length) {
+ csr_addr = kmalloc(input.length, GFP_KERNEL);
+ if (!csr_addr) {
+ ret = -ENOMEM;
+ goto e_err;
+ }
+ if (copy_from_user(csr_addr, (void *)input.address,
+ input.length)) {
+ ret = -EFAULT;
+ goto e_csr_free;
+ }
+
+ data->address = __psp_pa(csr_addr);
+ data->length = input.length;
+ }
+
+ ret = sev_issue_cmd(SEV_CMD_PEK_CSR,
+ data, SEV_DEFAULT_TIMEOUT, &argp->error);
+
+ input.length = data->length;
+
+ /* copy PEK certificate length to userspace */
+ if (copy_to_user((void *)argp->data, &input,
+ sizeof(struct sev_user_data_pek_csr)))
+ ret = -EFAULT;
+e_csr_free:
+ kfree(csr_addr);
+e_err:
+ kfree(data);
+ return ret;
+}
+
+static int sev_ioctl_pek_cert_import(struct sev_issue_cmd *argp)
+{
+ int ret;
+ struct sev_data_pek_cert_import *data;
+ struct sev_user_data_pek_cert_import input;
+ void *pek_cert, *oca_cert;
+
+ if (copy_from_user(&input, (void *)argp->data, sizeof(*data)))
+ return -EFAULT;
+
+ if (!input.pek_cert_address || !input.pek_cert_length ||
+ !input.oca_cert_address || !input.oca_cert_length)
+ return -EINVAL;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ /* copy PEK certificate from userspace */
+ pek_cert = kmalloc(input.pek_cert_length, GFP_KERNEL);
+ if (!pek_cert) {
+ ret = -ENOMEM;
+ goto e_free;
+ }
+ if (copy_from_user(pek_cert, (void *)input.pek_cert_address,
+ input.pek_cert_length)) {
+ ret = -EFAULT;
+ goto e_free_pek_cert;
+ }
+
+ data->pek_cert_address = __psp_pa(pek_cert);
+ data->pek_cert_length = input.pek_cert_length;
+
+ /* copy OCA certificate from userspace */
+ oca_cert = kmalloc(input.oca_cert_length, GFP_KERNEL);
+ if (!oca_cert) {
+ ret = -ENOMEM;
+ goto e_free_pek_cert;
+ }
+ if (copy_from_user(oca_cert, (void *)input.oca_cert_address,
+ input.oca_cert_length)) {
+ ret = -EFAULT;
+ goto e_free_oca_cert;
+ }
+
+ data->oca_cert_address = __psp_pa(oca_cert);
+ data->oca_cert_length = input.oca_cert_length;
+
+ ret = sev_issue_cmd(SEV_CMD_PEK_CERT_IMPORT,
+ data, SEV_DEFAULT_TIMEOUT, &argp->error);
+e_free_oca_cert:
+ kfree(oca_cert);
+e_free_pek_cert:
+ kfree(pek_cert);
+e_free:
+ kfree(data);
+ return ret;
+}
+
+static int sev_ioctl_pdh_cert_export(struct sev_issue_cmd *argp)
+{
+ int ret;
+ struct sev_data_pdh_cert_export *data;
+ struct sev_user_data_pdh_cert_export input;
+ void *pdh_cert = NULL, *cert_chain = NULL;
+
+ if (copy_from_user(&input, (void *)argp->data, sizeof(*data)))
+ return -EFAULT;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ /* copy pdh certificate from userspace */
+ if (input.pdh_cert_length && input.pdh_cert_address) {
+ pdh_cert = kmalloc(input.pdh_cert_length, GFP_KERNEL);
+ if (!pdh_cert) {
+ ret = -ENOMEM;
+ goto e_free;
+ }
+ if (copy_from_user(pdh_cert, (void *)input.pdh_cert_address,
+ input.pdh_cert_length)) {
+ ret = -EFAULT;
+ goto e_free_pdh_cert;
+ }
+
+ data->pdh_cert_address = __psp_pa(pdh_cert);
+ data->pdh_cert_length = input.pdh_cert_length;
+ }
+
+ /* copy cert_chain certificate from userspace */
+ if (input.cert_chain_length && input.cert_chain_address) {
+ cert_chain = kmalloc(input.cert_chain_length, GFP_KERNEL);
+ if (!cert_chain) {
+ ret = -ENOMEM;
+ goto e_free_pdh_cert;
+ }
+ if (copy_from_user(cert_chain, (void *)input.cert_chain_address,
+ input.cert_chain_length)) {
+ ret = -EFAULT;
+ goto e_free_cert_chain;
+ }
+
+ data->cert_chain_address = __psp_pa(cert_chain);
+ data->cert_chain_length = input.cert_chain_length;
+ }
+
+ ret = sev_issue_cmd(SEV_CMD_PDH_CERT_EXPORT,
+ data, SEV_DEFAULT_TIMEOUT, &argp->error);
+
+ input.cert_chain_length = data->cert_chain_length;
+ input.pdh_cert_length = data->pdh_cert_length;
+
+ /* copy certificate length to userspace */
+ if (copy_to_user((void *)argp->data, &input,
+ sizeof(struct sev_user_data_pek_csr)))
+ ret = -EFAULT;
+
+e_free_cert_chain:
+ kfree(cert_chain);
+e_free_pdh_cert:
+ kfree(pdh_cert);
+e_free:
+ kfree(data);
+ return ret;
+}
+
+static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg)
+{
+ int ret = -EFAULT;
+ void __user *argp = (void __user *)arg;
+ struct sev_issue_cmd input;
+
+ if (ioctl != SEV_ISSUE_CMD)
+ return -EINVAL;
+
+ if (copy_from_user(&input, argp, sizeof(struct sev_issue_cmd)))
+ return -EFAULT;
+
+ if (input.cmd > SEV_CMD_MAX)
+ return -EINVAL;
+
+ switch (input.cmd) {
+
+ case SEV_USER_CMD_INIT: {
+ ret = sev_ioctl_init(&input);
+ break;
+ }
+ case SEV_USER_CMD_SHUTDOWN: {
+ ret = sev_platform_shutdown(&input.error);
+ break;
+ }
+ case SEV_USER_CMD_FACTORY_RESET: {
+ ret = sev_issue_cmd(SEV_CMD_FACTORY_RESET, 0,
+ SEV_DEFAULT_TIMEOUT, &input.error);
+ break;
+ }
+ case SEV_USER_CMD_PLATFORM_STATUS: {
+ ret = sev_ioctl_platform_status(&input);
+ break;
+ }
+ case SEV_USER_CMD_PEK_GEN: {
+ ret = sev_issue_cmd(SEV_CMD_PEK_GEN, 0,
+ SEV_DEFAULT_TIMEOUT, &input.error);
+ break;
+ }
+ case SEV_USER_CMD_PDH_GEN: {
+ ret = sev_issue_cmd(SEV_CMD_PDH_GEN, 0,
+ SEV_DEFAULT_TIMEOUT, &input.error);
+ break;
+ }
+ case SEV_USER_CMD_PEK_CSR: {
+ ret = sev_ioctl_pek_csr(&input);
+ break;
+ }
+ case SEV_USER_CMD_PEK_CERT_IMPORT: {
+ ret = sev_ioctl_pek_cert_import(&input);
+ break;
+ }
+ case SEV_USER_CMD_PDH_CERT_EXPORT: {
+ ret = sev_ioctl_pdh_cert_export(&input);
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd)))
+ ret = -EFAULT;
+
+ return ret;
+}
+
+const struct file_operations sev_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = sev_ioctl,
+};
+
+int sev_ops_init(struct sev_device *sev)
+{
+ struct miscdevice *misc = &sev->misc;
+
+ misc->minor = MISC_DYNAMIC_MINOR;
+ misc->name = sev->name;
+ misc->fops = &sev_fops;
+
+ return misc_register(misc);
+}
+
+void sev_ops_destroy(struct sev_device *sev)
+{
+ misc_deregister(&sev->misc);
+}
+
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
new file mode 100644
index 0000000..acce6ed
--- /dev/null
+++ b/include/linux/psp-sev.h
@@ -0,0 +1,672 @@
+/*
+ * AMD Secure Encrypted Virtualization (SEV) driver interface
+ *
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PSP_SEV_H__
+#define __PSP_SEV_H__
+
+#ifdef CONFIG_X86
+#include <linux/mem_encrypt.h>
+
+#define __psp_pa(x) __sme_pa(x)
+#else
+#define __psp_pa(x) __pa(x)
+#endif
+
+/**
+ * SEV platform and guest management commands
+ */
+enum sev_cmd {
+ /* platform commands */
+ SEV_CMD_INIT = 0x001,
+ SEV_CMD_SHUTDOWN = 0x002,
+ SEV_CMD_FACTORY_RESET = 0x003,
+ SEV_CMD_PLATFORM_STATUS = 0x004,
+ SEV_CMD_PEK_GEN = 0x005,
+ SEV_CMD_PEK_CSR = 0x006,
+ SEV_CMD_PEK_CERT_IMPORT = 0x007,
+ SEV_CMD_PDH_GEN = 0x008,
+ SEV_CMD_PDH_CERT_EXPORT = 0x009,
+ SEV_CMD_DF_FLUSH = 0x00A,
+
+ /* Guest commands */
+ SEV_CMD_DECOMMISSION = 0x020,
+ SEV_CMD_ACTIVATE = 0x021,
+ SEV_CMD_DEACTIVATE = 0x022,
+ SEV_CMD_GUEST_STATUS = 0x023,
+
+ /* Guest launch commands */
+ SEV_CMD_LAUNCH_START = 0x030,
+ SEV_CMD_LAUNCH_UPDATE_DATA = 0x031,
+ SEV_CMD_LAUNCH_UPDATE_VMSA = 0x032,
+ SEV_CMD_LAUNCH_MEASURE = 0x033,
+ SEV_CMD_LAUNCH_UPDATE_SECRET = 0x034,
+ SEV_CMD_LAUNCH_FINISH = 0x035,
+
+ /* Guest migration commands (outgoing) */
+ SEV_CMD_SEND_START = 0x040,
+ SEV_CMD_SEND_UPDATE_DATA = 0x041,
+ SEV_CMD_SEND_UPDATE_VMSA = 0x042,
+ SEV_CMD_SEND_FINISH = 0x043,
+
+ /* Guest migration commands (incoming) */
+ SEV_CMD_RECEIVE_START = 0x050,
+ SEV_CMD_RECEIVE_UPDATE_DATA = 0x051,
+ SEV_CMD_RECEIVE_UPDATE_VMSA = 0x052,
+ SEV_CMD_RECEIVE_FINISH = 0x053,
+
+ /* Guest debug commands */
+ SEV_CMD_DBG_DECRYPT = 0x060,
+ SEV_CMD_DBG_ENCRYPT = 0x061,
+
+ SEV_CMD_MAX,
+};
+
+/**
+ * status code returned by the commands
+ */
+enum psp_ret_code {
+ SEV_RET_SUCCESS = 0,
+ SEV_RET_INVALID_PLATFORM_STATE,
+ SEV_RET_INVALID_GUEST_STATE,
+ SEV_RET_INAVLID_CONFIG,
+ SEV_RET_INVALID_LENGTH,
+ SEV_RET_ALREADY_OWNED,
+ SEV_RET_INVALID_CERTIFICATE,
+ SEV_RET_POLICY_FAILURE,
+ SEV_RET_INACTIVE,
+ SEV_RET_INVALID_ADDRESS,
+ SEV_RET_BAD_SIGNATURE,
+ SEV_RET_BAD_MEASUREMENT,
+ SEV_RET_ASID_OWNED,
+ SEV_RET_INVALID_ASID,
+ SEV_RET_WBINVD_REQUIRED,
+ SEV_RET_DFFLUSH_REQUIRED,
+ SEV_RET_INVALID_GUEST,
+ SEV_RET_INVALID_COMMAND,
+ SEV_RET_ACTIVE,
+ SEV_RET_HWSEV_RET_PLATFORM,
+ SEV_RET_HWSEV_RET_UNSAFE,
+ SEV_RET_UNSUPPORTED,
+ SEV_RET_MAX,
+};
+
+/**
+ * struct sev_data_init - INIT command parameters
+ *
+ * @flags: processing flags
+ * @tmr_address: system physical address used for SEV-ES
+ * @tmr_length: length of tmr_address
+ */
+struct sev_data_init {
+ __u32 flags; /* In */
+ __u32 reserved; /* In */
+ __u64 tmr_address; /* In */
+ __u32 tmr_length; /* In */
+};
+
+/**
+ * struct sev_data_status - PLATFORM_STATUS command parameters
+ *
+ * @major: major API version
+ * @minor: minor API version
+ * @state: platform state
+ * @owner: self-owned or externally owned
+ * @config: platform config flags
+ * @guest_count: number of active guests
+ */
+struct sev_data_status {
+ __u8 api_major; /* Out */
+ __u8 api_minor; /* Out */
+ __u8 state; /* Out */
+ __u8 owner; /* Out */
+ __u32 config; /* Out */
+ __u32 guest_count; /* Out */
+};
+
+/**
+ * struct sev_data_pek_csr - PEK_CSR command parameters
+ *
+ * @address: PEK certificate chain
+ * @length: length of certificate
+ */
+struct sev_data_pek_csr {
+ __u64 address; /* In */
+ __u32 length; /* In/Out */
+};
+
+/**
+ * struct sev_data_cert_import - PEK_CERT_IMPORT command parameters
+ *
+ * @pek_address: PEK certificate chain
+ * @pek_length: length of PEK certificate
+ * @oca_address: OCA certificate chain
+ * @oca_length: length of OCA certificate
+ */
+struct sev_data_pek_cert_import {
+ __u64 pek_cert_address; /* In */
+ __u32 pek_cert_length; /* In */
+ __u32 reserved; /* In */
+ __u64 oca_cert_address; /* In */
+ __u32 oca_cert_length; /* In */
+};
+
+/**
+ * struct sev_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
+ *
+ * @pdh_address: PDH certificate address
+ * @pdh_length: length of PDH certificate
+ * @cert_chain_address: PDH certificate chain
+ * @cert_chain_length: length of PDH certificate chain
+ */
+struct sev_data_pdh_cert_export {
+ __u64 pdh_cert_address; /* In */
+ __u32 pdh_cert_length; /* In/Out */
+ __u32 reserved; /* In */
+ __u64 cert_chain_address; /* In */
+ __u32 cert_chain_length; /* In/Out */
+};
+
+/**
+ * struct sev_data_decommission - DECOMMISSION command parameters
+ *
+ * @handle: handle of the VM to decommission
+ */
+struct sev_data_decommission {
+ u32 handle; /* In */
+};
+
+/**
+ * struct sev_data_activate - ACTIVATE command parameters
+ *
+ * @handle: handle of the VM to activate
+ * @asid: asid assigned to the VM
+ */
+struct sev_data_activate {
+ u32 handle; /* In */
+ u32 asid; /* In */
+};
+
+/**
+ * struct sev_data_deactivate - DEACTIVATE command parameters
+ *
+ * @handle: handle of the VM to deactivate
+ */
+struct sev_data_deactivate {
+ u32 handle; /* In */
+};
+
+/**
+ * struct sev_data_guest_status - SEV GUEST_STATUS command parameters
+ *
+ * @handle: handle of the VM to retrieve status
+ * @policy: policy information for the VM
+ * @asid: current ASID of the VM
+ * @state: current state of the VM
+ */
+struct sev_data_guest_status {
+ u32 handle; /* In */
+ u32 policy; /* Out */
+ u32 asid; /* Out */
+ u8 state; /* Out */
+};
+
+/**
+ * struct sev_data_launch_start - LAUNCH_START command parameters
+ *
+ * @handle: handle assigned to the VM
+ * @policy: guest launch policy
+ * @dh_cert_address: physical address of DH certificate blob
+ * @dh_cert_length: length of DH certificate blob
+ * @session_address: physical address of session parameters
+ * @session_len: length of session parameters
+ */
+struct sev_data_launch_start {
+ u32 handle; /* In/Out */
+ u32 policy; /* In */
+ u64 dh_cert_address; /* In */
+ u32 dh_cert_length; /* In */
+ u32 reserved; /* In */
+ u64 session_data_address; /* In */
+ u32 session_data_length; /* In */
+};
+
+/**
+ * struct sev_data_launch_update_data - LAUNCH_UPDATE_DATA command parameter
+ *
+ * @handle: handle of the VM to update
+ * @length: length of memory to be encrypted
+ * @address: physical address of memory region to encrypt
+ */
+struct sev_data_launch_update_data {
+ u32 handle; /* In */
+ u32 reserved;
+ u64 address; /* In */
+ u32 length; /* In */
+};
+
+/**
+ * struct sev_data_launch_update_vmsa - LAUNCH_UPDATE_VMSA command
+ *
+ * @handle: handle of the VM
+ * @address: physical address of memory region to encrypt
+ * @length: length of memory region to encrypt
+ */
+struct sev_data_launch_update_vmsa {
+ u32 handle; /* In */
+ u32 reserved;
+ u64 address; /* In */
+ u32 length; /* In */
+};
+
+/**
+ * struct sev_data_launch_measure - LAUNCH_MEASURE command parameters
+ *
+ * @handle: handle of the VM to process
+ * @address: physical address containing the measurement blob
+ * @length: length of measurement blob
+ */
+struct sev_data_launch_measure {
+ u32 handle; /* In */
+ u32 reserved;
+ u64 address; /* In */
+ u32 length; /* In/Out */
+};
+
+/**
+ * struct sev_data_launch_secret - LAUNCH_SECRET command parameters
+ *
+ * @handle: handle of the VM to process
+ * @hdr_address: physical address containing the packet header
+ * @hdr_length: length of packet header
+ * @guest_address: system physical address of guest memory region
+ * @guest_length: length of guest_paddr
+ * @trans_address: physical address of transport memory buffer
+ * @trans_length: length of transport memory buffer
+ */
+struct sev_data_launch_secret {
+ u32 handle; /* In */
+ u32 reserved1;
+ u64 hdr_address; /* In */
+ u32 hdr_length; /* In */
+ u32 reserved2;
+ u64 guest_address; /* In */
+ u32 guest_length; /* In */
+ u32 reserved3;
+ u64 trans_address; /* In */
+ u32 trans_length; /* In */
+};
+
+/**
+ * struct sev_data_launch_finish - LAUNCH_FINISH command parameters
+ *
+ * @handle: handle of the VM to process
+ */
+struct sev_data_launch_finish {
+ u32 handle; /* In */
+};
+
+/**
+ * struct sev_data_send_start - SEND_START command parameters
+ *
+ * @handle: handle of the VM to process
+ * @pdh_cert_address: physical address containing PDH certificate
+ * @pdh_cert_length: length of PDH certificate
+ * @plat_certs_address: physical address containing platform certificate
+ * @plat_certs_length: length of platform certificate
+ * @amd_certs_address: physical address containing AMD certificate
+ * @amd_certs_length: length of AMD certificate
+ * @session_data_address: physical address containing Session data
+ * @session_length: length of session data
+ */
+struct sev_data_send_start {
+ u32 handle; /* In */
+ u32 reserved1;
+ u64 pdh_cert_address; /* In */
+ u32 pdh_cert_length; /* In/Out */
+ u32 reserved2;
+ u64 plat_cert_address; /* In */
+ u32 plat_cert_length; /* In/Out */
+ u32 reserved3;
+ u64 amd_cert_address; /* In */
+ u32 amd_cert_length; /* In/Out */
+ u32 reserved4;
+ u64 session_data_address; /* In */
+ u32 session_data_length; /* In/Out */
+};
+
+/**
+ * struct sev_data_send_update - SEND_UPDATE_DATA command
+ *
+ * @handle: handle of the VM to process
+ * @hdr_address: physical address containing packet header
+ * @hdr_length: length of packet header
+ * @guest_address: physical address of guest memory region to send
+ * @guest_length: length of guest memory region to send
+ * @trans_address: physical address of host memory region
+ * @trans_length: length of host memory region
+ */
+struct sev_data_send_update_data {
+ u32 handle; /* In */
+ u32 reserved1;
+ u64 hdr_address; /* In */
+ u32 hdr_length; /* In/Out */
+ u32 reserved2;
+ u64 guest_address; /* In */
+ u32 guest_length; /* In */
+ u32 reserved3;
+ u64 trans_address; /* In */
+ u32 trans_length; /* In */
+};
+
+/**
+ * struct sev_data_send_update - SEND_UPDATE_VMSA command
+ *
+ * @handle: handle of the VM to process
+ * @hdr_address: physical address containing packet header
+ * @hdr_length: length of packet header
+ * @guest_address: physical address of guest memory region to send
+ * @guest_length: length of guest memory region to send
+ * @trans_address: physical address of host memory region
+ * @trans_length: length of host memory region
+ */
+struct sev_data_send_update_vmsa {
+ u32 handle; /* In */
+ u64 hdr_address; /* In */
+ u32 hdr_length; /* In/Out */
+ u32 reserved2;
+ u64 guest_address; /* In */
+ u32 guest_length; /* In */
+ u32 reserved3;
+ u64 trans_address; /* In */
+ u32 trans_length; /* In */
+};
+
+/**
+ * struct sev_data_send_finish - SEND_FINISH command parameters
+ *
+ * @handle: handle of the VM to process
+ */
+struct sev_data_send_finish {
+ u32 handle; /* In */
+};
+
+/**
+ * struct sev_data_receive_start - RECEIVE_START command parameters
+ *
+ * @handle: handle of the VM to perform receive operation
+ * @pdh_cert_address: system physical address containing PDH certificate blob
+ * @pdh_cert_length: length of PDH certificate blob
+ * @session_address: system physical address containing session blob
+ * @session_length: length of session blob
+ */
+struct sev_data_receive_start {
+ u32 handle; /* In/Out */
+ u32 reserved1;
+ u64 pdh_cert_address; /* In */
+ u32 pdh_cert_length; /* In */
+ u32 reserved2;
+ u64 session_data_address; /* In */
+ u32 session_data_length; /* In/Out */
+};
+
+/**
+ * struct sev_data_receive_update_data - RECEIVE_UPDATE_DATA command parameters
+ *
+ * @handle: handle of the VM to update
+ * @hdr_address: physical address containing packet header blob
+ * @hdr_length: length of packet header
+ * @guest_address: system physical address of guest memory region
+ * @guest_length: length of guest memory region
+ * @trans_address: system physical address of transport buffer
+ * @trans_length: length of transport buffer
+ */
+struct sev_data_receive_update_data {
+ u32 handle; /* In */
+ u32 reserved1;
+ u64 hdr_address; /* In */
+ u32 hdr_length; /* In */
+ u32 reserved2;
+ u64 guest_address; /* In */
+ u32 guest_length; /* In */
+ u32 reserved3;
+ u64 trans_address; /* In */
+ u32 trans_length; /* In */
+};
+
+/**
+ * struct sev_data_receive_update_vmsa - RECEIVE_UPDATE_VMSA command parameters
+ *
+ * @handle: handle of the VM to update
+ * @hdr_address: physical address containing packet header blob
+ * @hdr_length: length of packet header
+ * @guest_address: system physical address of guest memory region
+ * @guest_length: length of guest memory region
+ * @trans_address: system physical address of transport buffer
+ * @trans_length: length of transport buffer
+ */
+struct sev_data_receive_update_vmsa {
+ u32 handle; /* In */
+ u32 reserved1;
+ u64 hdr_address; /* In */
+ u32 hdr_length; /* In */
+ u32 reserved2;
+ u64 guest_address; /* In */
+ u32 guest_length; /* In */
+ u32 reserved3;
+ u64 trans_address; /* In */
+ u32 trans_length; /* In */
+};
+
+/**
+ * struct sev_data_receive_finish - RECEIVE_FINISH command parameters
+ *
+ * @handle: handle of the VM to finish
+ */
+struct sev_data_receive_finish {
+ u32 handle; /* In */
+};
+
+/**
+ * struct sev_data_dbg - DBG_ENCRYPT/DBG_DECRYPT command parameters
+ *
+ * @handle: handle of the VM to perform debug operation
+ * @src_addr: source address of data to operate on
+ * @dst_addr: destination address of data to operate on
+ * @length: length of data to operate on
+ */
+struct sev_data_dbg {
+ u32 handle; /* In */
+ u32 reserved;
+ u64 src_addr; /* In */
+ u64 dst_addr; /* In */
+ u32 length; /* In */
+};
+
+#if defined(CONFIG_CRYPTO_DEV_SEV)
+
+/**
+ * sev_platform_init - perform SEV INIT command
+ *
+ * @init: sev_data_init structure to be processed
+ * @error: SEV command return code
+ *
+ * Returns:
+ * 0 if the SEV successfully processed the command
+ * -%ENODEV if the SEV device is not available
+ * -%ENOTSUPP if the SEV does not support SEV
+ * -%ETIMEDOUT if the SEV command timed out
+ * -%EIO if the SEV returned a non-zero return code
+ */
+int sev_platform_init(struct sev_data_init *init, int *error);
+
+/**
+ * sev_platform_shutdown - perform SEV SHUTDOWN command
+ *
+ * @error: SEV command return code
+ *
+ * Returns:
+ * 0 if the SEV successfully processed the command
+ * -%ENODEV if the SEV device is not available
+ * -%ENOTSUPP if the SEV does not support SEV
+ * -%ETIMEDOUT if the SEV command timed out
+ * -%EIO if the SEV returned a non-zero return code
+ */
+int sev_platform_shutdown(int *error);
+
+/**
+ * sev_platform_status - perform SEV PLATFORM_STATUS command
+ *
+ * @init: sev_data_status structure to be processed
+ * @error: SEV command return code
+ *
+ * Returns:
+ * 0 if the SEV successfully processed the command
+ * -%ENODEV if the SEV device is not available
+ * -%ENOTSUPP if the SEV does not support SEV
+ * -%ETIMEDOUT if the SEV command timed out
+ * -%EIO if the SEV returned a non-zero return code
+ */
+int sev_platform_status(struct sev_data_status *status, int *error);
+
+/**
+ * sev_issue_cmd_external_user - issue SEV command by other driver
+ *
+ * The function can be used by other drivers to issue a SEV command on
+ * behalf by userspace. The caller must pass a valid SEV file descriptor
+ * so that we know that caller has access to SEV device.
+ *
+ * @filep - SEV device file pointer
+ * @cmd - command to issue
+ * @data - command buffer
+ * @timeout - If zero then use default timeout
+ * @error: SEV command return code
+ *
+ * Returns:
+ * 0 if the SEV successfully processed the command
+ * -%ENODEV if the SEV device is not available
+ * -%ENOTSUPP if the SEV does not support SEV
+ * -%ETIMEDOUT if the SEV command timed out
+ * -%EIO if the SEV returned a non-zero return code
+ * -%EINVAL if the SEV file descriptor is not valid
+ */
+int sev_issue_cmd_external_user(struct file *filep, unsigned int id,
+ void *data, int timeout, int *error);
+
+/**
+ * sev_guest_deactivate - perform SEV DEACTIVATE command
+ *
+ * @deactivate: sev_data_deactivate structure to be processed
+ * @sev_ret: sev command return code
+ *
+ * Returns:
+ * 0 if the sev successfully processed the command
+ * -%ENODEV if the sev device is not available
+ * -%ENOTSUPP if the sev does not support SEV
+ * -%ETIMEDOUT if the sev command timed out
+ * -%EIO if the sev returned a non-zero return code
+ */
+int sev_guest_deactivate(struct sev_data_deactivate *data, int *error);
+
+/**
+ * sev_guest_activate - perform SEV ACTIVATE command
+ *
+ * @activate: sev_data_activate structure to be processed
+ * @sev_ret: sev command return code
+ *
+ * Returns:
+ * 0 if the sev successfully processed the command
+ * -%ENODEV if the sev device is not available
+ * -%ENOTSUPP if the sev does not support SEV
+ * -%ETIMEDOUT if the sev command timed out
+ * -%EIO if the sev returned a non-zero return code
+ */
+int sev_guest_activate(struct sev_data_activate *data, int *error);
+
+/**
+ * sev_guest_df_flush - perform SEV DF_FLUSH command
+ *
+ * @sev_ret: sev command return code
+ *
+ * Returns:
+ * 0 if the sev successfully processed the command
+ * -%ENODEV if the sev device is not available
+ * -%ENOTSUPP if the sev does not support SEV
+ * -%ETIMEDOUT if the sev command timed out
+ * -%EIO if the sev returned a non-zero return code
+ */
+int sev_guest_df_flush(int *error);
+
+/**
+ * sev_guest_decommission - perform SEV DECOMMISSION command
+ *
+ * @decommission: sev_data_decommission structure to be processed
+ * @sev_ret: sev command return code
+ *
+ * Returns:
+ * 0 if the sev successfully processed the command
+ * -%ENODEV if the sev device is not available
+ * -%ENOTSUPP if the sev does not support SEV
+ * -%ETIMEDOUT if the sev command timed out
+ * -%EIO if the sev returned a non-zero return code
+ */
+int sev_guest_decommission(struct sev_data_decommission *data, int *error);
+
+#else /* !CONFIG_CRYPTO_DEV_SEV */
+
+static inline int sev_platform_status(struct sev_data_status *status,
+ int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_platform_init(struct sev_data_init *init, int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_platform_shutdown(int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_issue_cmd_external_user(int fd, unsigned int id,
+ void *data, int timeout, int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_guest_deactivate(struct sev_data_deactivate *data,
+ int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_guest_decommission(struct sev_data_decommission *data,
+ int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_guest_activate(struct sev_data_activate *data,
+ int *error)
+{
+ return -ENODEV;
+}
+
+static inline int sev_guest_df_flush(int *error)
+{
+ return -ENODEV;
+}
+
+#endif /* CONFIG_CRYPTO_DEV_SEV */
+
+#endif /* __PSP_SEV_H__ */
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index f330ba4..2e15ea7 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -481,3 +481,4 @@ header-y += xilinx-v4l2-controls.h
header-y += zorro.h
header-y += zorro_ids.h
header-y += userfaultfd.h
+header-y += psp-sev.h
diff --git a/include/uapi/linux/psp-sev.h b/include/uapi/linux/psp-sev.h
new file mode 100644
index 0000000..050976d
--- /dev/null
+++ b/include/uapi/linux/psp-sev.h
@@ -0,0 +1,123 @@
+
+/*
+ * Userspace interface for AMD Secure Encrypted Virtualization (SEV)
+ *
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PSP_SEV_USER_H__
+#define __PSP_SEV_USER_H__
+
+#include <linux/types.h>
+
+/**
+ * SEV platform commands
+ */
+enum {
+ SEV_USER_CMD_INIT = 0,
+ SEV_USER_CMD_SHUTDOWN,
+ SEV_USER_CMD_FACTORY_RESET,
+ SEV_USER_CMD_PLATFORM_STATUS,
+ SEV_USER_CMD_PEK_GEN,
+ SEV_USER_CMD_PEK_CSR,
+ SEV_USER_CMD_PDH_GEN,
+ SEV_USER_CMD_PDH_CERT_EXPORT,
+ SEV_USER_CMD_PEK_CERT_IMPORT,
+
+ SEV_USER_CMD_MAX,
+};
+
+/**
+ * struct sev_user_data_init - INIT command parameters
+ *
+ * @flags: processing flags
+ */
+struct sev_user_data_init {
+ __u32 flags; /* In */
+};
+
+/**
+ * struct sev_user_data_status - PLATFORM_STATUS command parameters
+ *
+ * @major: major API version
+ * @minor: minor API version
+ * @state: platform state
+ * @owner: self-owned or externally owned
+ * @config: platform config flags
+ * @guest_count: number of active guests
+ */
+struct sev_user_data_status {
+ __u8 api_major; /* Out */
+ __u8 api_minor; /* Out */
+ __u8 state; /* Out */
+ __u8 owner; /* Out */
+ __u32 config; /* Out */
+ __u32 guest_count; /* Out */
+};
+
+/**
+ * struct sev_user_data_pek_csr - PEK_CSR command parameters
+ *
+ * @address: PEK certificate chain
+ * @length: length of certificate
+ */
+struct sev_user_data_pek_csr {
+ __u64 address; /* In */
+ __u32 length; /* In/Out */
+};
+
+/**
+ * q
+ * struct sev_user_data_cert_import - PEK_CERT_IMPORT command parameters
+ *
+ * @pek_address: PEK certificate chain
+ * @pek_length: length of PEK certificate
+ * @oca_address: OCA certificate chain
+ * @oca_length: length of OCA certificate
+ */
+struct sev_user_data_pek_cert_import {
+ __u64 pek_cert_address; /* In */
+ __u32 pek_cert_length; /* In */
+ __u64 oca_cert_address; /* In */
+ __u32 oca_cert_length; /* In */
+};
+
+/**
+ * struct sev_user_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
+ *
+ * @pdh_address: PDH certificate address
+ * @pdh_length: length of PDH certificate
+ * @cert_chain_address: PDH certificate chain
+ * @cert_chain_length: length of PDH certificate chain
+ */
+struct sev_user_data_pdh_cert_export {
+ __u64 pdh_cert_address; /* In */
+ __u32 pdh_cert_length; /* In/Out */
+ __u64 cert_chain_address; /* In */
+ __u32 cert_chain_length; /* In/Out */
+};
+
+/**
+ * struct sev_issue_cmd - SEV ioctl parameters
+ *
+ * @cmd: SEV commands to execute
+ * @opaque: pointer to the command structure
+ * @error: SEV FW return code on failure
+ */
+struct sev_issue_cmd {
+ __u32 cmd; /* In */
+ __u64 data; /* In */
+ __u32 error; /* Out */
+};
+
+#define SEV_IOC_TYPE 'S'
+#define SEV_ISSUE_CMD _IOWR(SEV_IOC_TYPE, 0x0, struct sev_issue_cmd)
+
+#endif /* __PSP_USER_SEV_H */
+
