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KVM changes for 4.16

Browse source 
ARM:
 - Include icache invalidation optimizations, improving VM startup time
 
 - Support for forwarded level-triggered interrupts, improving
   performance for timers and passthrough platform devices
 
 - A small fix for power-management notifiers, and some cosmetic changes
 
 PPC:
 - Add MMIO emulation for vector loads and stores
 
 - Allow HPT guests to run on a radix host on POWER9 v2.2 CPUs without
   requiring the complex thread synchronization of older CPU versions
 
 - Improve the handling of escalation interrupts with the XIVE interrupt
   controller
 
 - Support decrement register migration
 
 - Various cleanups and bugfixes.
 
 s390:
 - Cornelia Huck passed maintainership to Janosch Frank
 
 - Exitless interrupts for emulated devices
 
 - Cleanup of cpuflag handling
 
 - kvm_stat counter improvements
 
 - VSIE improvements
 
 - mm cleanup
 
 x86:
 - Hypervisor part of SEV
 
 - UMIP, RDPID, and MSR_SMI_COUNT emulation
 
 - Paravirtualized TLB shootdown using the new KVM_VCPU_PREEMPTED bit
 
 - Allow guests to see TOPOEXT, GFNI, VAES, VPCLMULQDQ, and more AVX512
   features
 
 - Show vcpu id in its anonymous inode name
 
 - Many fixes and cleanups
 
 - Per-VCPU MSR bitmaps (already merged through x86/pti branch)
 
 - Stable KVM clock when nesting on Hyper-V (merged through x86/hyperv)
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Merge tag 'kvm-4.16-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Radim Krčmář:
 "ARM:

   - icache invalidation optimizations, improving VM startup time

   - support for forwarded level-triggered interrupts, improving
     performance for timers and passthrough platform devices

   - a small fix for power-management notifiers, and some cosmetic
     changes

  PPC:

   - add MMIO emulation for vector loads and stores

   - allow HPT guests to run on a radix host on POWER9 v2.2 CPUs without
     requiring the complex thread synchronization of older CPU versions

   - improve the handling of escalation interrupts with the XIVE
     interrupt controller

   - support decrement register migration

   - various cleanups and bugfixes.

  s390:

   - Cornelia Huck passed maintainership to Janosch Frank

   - exitless interrupts for emulated devices

   - cleanup of cpuflag handling

   - kvm_stat counter improvements

   - VSIE improvements

   - mm cleanup

  x86:

   - hypervisor part of SEV

   - UMIP, RDPID, and MSR_SMI_COUNT emulation

   - paravirtualized TLB shootdown using the new KVM_VCPU_PREEMPTED bit

   - allow guests to see TOPOEXT, GFNI, VAES, VPCLMULQDQ, and more
     AVX512 features

   - show vcpu id in its anonymous inode name

   - many fixes and cleanups

   - per-VCPU MSR bitmaps (already merged through x86/pti branch)

   - stable KVM clock when nesting on Hyper-V (merged through
     x86/hyperv)"

* tag 'kvm-4.16-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (197 commits)
  KVM: PPC: Book3S: Add MMIO emulation for VMX instructions
  KVM: PPC: Book3S HV: Branch inside feature section
  KVM: PPC: Book3S HV: Make HPT resizing work on POWER9
  KVM: PPC: Book3S HV: Fix handling of secondary HPTEG in HPT resizing code
  KVM: PPC: Book3S PR: Fix broken select due to misspelling
  KVM: x86: don't forget vcpu_put() in kvm_arch_vcpu_ioctl_set_sregs()
  KVM: PPC: Book3S PR: Fix svcpu copying with preemption enabled
  KVM: PPC: Book3S HV: Drop locks before reading guest memory
  kvm: x86: remove efer_reload entry in kvm_vcpu_stat
  KVM: x86: AMD Processor Topology Information
  x86/kvm/vmx: do not use vm-exit instruction length for fast MMIO when running nested
  kvm: embed vcpu id to dentry of vcpu anon inode
  kvm: Map PFN-type memory regions as writable (if possible)
  x86/kvm: Make it compile on 32bit and with HYPYERVISOR_GUEST=n
  KVM: arm/arm64: Fixup userspace irqchip static key optimization
  KVM: arm/arm64: Fix userspace_irqchip_in_use counting
  KVM: arm/arm64: Fix incorrect timer_is_pending logic
  MAINTAINERS: update KVM/s390 maintainers
  MAINTAINERS: add Halil as additional vfio-ccw maintainer
  MAINTAINERS: add David as a reviewer for KVM/s390
  ...
This commit is contained in:
Linus Torvalds 2018-02-10 13:16:35 -08:00
commit 15303ba5d1
123 changed files with 6577 additions and 1416 deletions
Download patch file Download diff file Expand all files Collapse all files

12
drivers/crypto/ccp/Kconfig
View file

@ -1,5 +1,6 @@
config CRYPTO_DEV_CCP_DD
tristate "Secure Processor device driver"
depends on CPU_SUP_AMD || ARM64
default m
help
Provides AMD Secure Processor device driver.
@ -32,3 +33,14 @@ config CRYPTO_DEV_CCP_CRYPTO
Support for using the cryptographic API with the AMD Cryptographic
Coprocessor. This module supports offload of SHA and AES algorithms.
If you choose 'M' here, this module will be called ccp_crypto.
config CRYPTO_DEV_SP_PSP
bool "Platform Security Processor (PSP) device"
default y
depends on CRYPTO_DEV_CCP_DD && X86_64
help
Provide support for the AMD Platform Security Processor (PSP).
The PSP is a dedicated processor that provides support for key
management commands in Secure Encrypted Virtualization (SEV) mode,
along with software-based Trusted Execution Environment (TEE) to
enable third-party trusted applications.

1
drivers/crypto/ccp/Makefile
View file

@ -8,6 +8,7 @@ ccp-$(CONFIG_CRYPTO_DEV_SP_CCP) += ccp-dev.o \
ccp-dmaengine.o \
ccp-debugfs.o
ccp-$(CONFIG_PCI) += sp-pci.o
ccp-$(CONFIG_CRYPTO_DEV_SP_PSP) += psp-dev.o
obj-$(CONFIG_CRYPTO_DEV_CCP_CRYPTO) += ccp-crypto.o
ccp-crypto-objs := ccp-crypto-main.o \

805
drivers/crypto/ccp/psp-dev.c Normal file
View file

@ -0,0 +1,805 @@
/*
* AMD Platform Security Processor (PSP) interface
*
* Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
*
* Author: Brijesh Singh <brijesh.singh@amd.com>
*
* 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/hw_random.h>
#include <linux/ccp.h>
#include "sp-dev.h"
#include "psp-dev.h"
#define DEVICE_NAME "sev"
static DEFINE_MUTEX(sev_cmd_mutex);
static struct sev_misc_dev *misc_dev;
static struct psp_device *psp_master;
static struct psp_device *psp_alloc_struct(struct sp_device *sp)
{
struct device *dev = sp->dev;
struct psp_device *psp;
psp = devm_kzalloc(dev, sizeof(*psp), GFP_KERNEL);
if (!psp)
return NULL;
psp->dev = dev;
psp->sp = sp;
snprintf(psp->name, sizeof(psp->name), "psp-%u", sp->ord);
return psp;
}
static irqreturn_t psp_irq_handler(int irq, void *data)
{
struct psp_device *psp = data;
unsigned int status;
int reg;
/* Read the interrupt status: */
status = ioread32(psp->io_regs + PSP_P2CMSG_INTSTS);
/* Check if it is command completion: */
if (!(status & BIT(PSP_CMD_COMPLETE_REG)))
goto done;
/* Check if it is SEV command completion: */
reg = ioread32(psp->io_regs + PSP_CMDRESP);
if (reg & PSP_CMDRESP_RESP) {
psp->sev_int_rcvd = 1;
wake_up(&psp->sev_int_queue);
}
done:
/* Clear the interrupt status by writing the same value we read. */
iowrite32(status, psp->io_regs + PSP_P2CMSG_INTSTS);
return IRQ_HANDLED;
}
static void sev_wait_cmd_ioc(struct psp_device *psp, unsigned int *reg)
{
psp->sev_int_rcvd = 0;
wait_event(psp->sev_int_queue, psp->sev_int_rcvd);
*reg = ioread32(psp->io_regs + PSP_CMDRESP);
}
static int sev_cmd_buffer_len(int cmd)
{
switch (cmd) {
case SEV_CMD_INIT: return sizeof(struct sev_data_init);
case SEV_CMD_PLATFORM_STATUS: return sizeof(struct sev_user_data_status);
case SEV_CMD_PEK_CSR: return sizeof(struct sev_data_pek_csr);
case SEV_CMD_PEK_CERT_IMPORT: return sizeof(struct sev_data_pek_cert_import);
case SEV_CMD_PDH_CERT_EXPORT: return sizeof(struct sev_data_pdh_cert_export);
case SEV_CMD_LAUNCH_START: return sizeof(struct sev_data_launch_start);
case SEV_CMD_LAUNCH_UPDATE_DATA: return sizeof(struct sev_data_launch_update_data);
case SEV_CMD_LAUNCH_UPDATE_VMSA: return sizeof(struct sev_data_launch_update_vmsa);
case SEV_CMD_LAUNCH_FINISH: return sizeof(struct sev_data_launch_finish);
case SEV_CMD_LAUNCH_MEASURE: return sizeof(struct sev_data_launch_measure);
case SEV_CMD_ACTIVATE: return sizeof(struct sev_data_activate);
case SEV_CMD_DEACTIVATE: return sizeof(struct sev_data_deactivate);
case SEV_CMD_DECOMMISSION: return sizeof(struct sev_data_decommission);
case SEV_CMD_GUEST_STATUS: return sizeof(struct sev_data_guest_status);
case SEV_CMD_DBG_DECRYPT: return sizeof(struct sev_data_dbg);
case SEV_CMD_DBG_ENCRYPT: return sizeof(struct sev_data_dbg);
case SEV_CMD_SEND_START: return sizeof(struct sev_data_send_start);
case SEV_CMD_SEND_UPDATE_DATA: return sizeof(struct sev_data_send_update_data);
case SEV_CMD_SEND_UPDATE_VMSA: return sizeof(struct sev_data_send_update_vmsa);
case SEV_CMD_SEND_FINISH: return sizeof(struct sev_data_send_finish);
case SEV_CMD_RECEIVE_START: return sizeof(struct sev_data_receive_start);
case SEV_CMD_RECEIVE_FINISH: return sizeof(struct sev_data_receive_finish);
case SEV_CMD_RECEIVE_UPDATE_DATA: return sizeof(struct sev_data_receive_update_data);
case SEV_CMD_RECEIVE_UPDATE_VMSA: return sizeof(struct sev_data_receive_update_vmsa);
case SEV_CMD_LAUNCH_UPDATE_SECRET: return sizeof(struct sev_data_launch_secret);
default: return 0;
}
return 0;
}
static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret)
{
struct psp_device *psp = psp_master;
unsigned int phys_lsb, phys_msb;
unsigned int reg, ret = 0;
if (!psp)
return -ENODEV;
/* Get the physical address of the command buffer */
phys_lsb = data ? lower_32_bits(__psp_pa(data)) : 0;
phys_msb = data ? upper_32_bits(__psp_pa(data)) : 0;
dev_dbg(psp->dev, "sev command id %#x buffer 0x%08x%08x\n",
cmd, phys_msb, phys_lsb);
print_hex_dump_debug("(in): ", DUMP_PREFIX_OFFSET, 16, 2, data,
sev_cmd_buffer_len(cmd), false);
iowrite32(phys_lsb, psp->io_regs + PSP_CMDBUFF_ADDR_LO);
iowrite32(phys_msb, psp->io_regs + PSP_CMDBUFF_ADDR_HI);
reg = cmd;
reg <<= PSP_CMDRESP_CMD_SHIFT;
reg |= PSP_CMDRESP_IOC;
iowrite32(reg, psp->io_regs + PSP_CMDRESP);
/* wait for command completion */
sev_wait_cmd_ioc(psp, &reg);
if (psp_ret)
*psp_ret = reg & PSP_CMDRESP_ERR_MASK;
if (reg & PSP_CMDRESP_ERR_MASK) {
dev_dbg(psp->dev, "sev command %#x failed (%#010x)\n",
cmd, reg & PSP_CMDRESP_ERR_MASK);
ret = -EIO;
}
print_hex_dump_debug("(out): ", DUMP_PREFIX_OFFSET, 16, 2, data,
sev_cmd_buffer_len(cmd), false);
return ret;
}
static int sev_do_cmd(int cmd, void *data, int *psp_ret)
{
int rc;
mutex_lock(&sev_cmd_mutex);
rc = __sev_do_cmd_locked(cmd, data, psp_ret);
mutex_unlock(&sev_cmd_mutex);
return rc;
}
static int __sev_platform_init_locked(int *error)
{
struct psp_device *psp = psp_master;
int rc = 0;
if (!psp)
return -ENODEV;
if (psp->sev_state == SEV_STATE_INIT)
return 0;
rc = __sev_do_cmd_locked(SEV_CMD_INIT, &psp->init_cmd_buf, error);
if (rc)
return rc;
psp->sev_state = SEV_STATE_INIT;
dev_dbg(psp->dev, "SEV firmware initialized\n");
return rc;
}
int sev_platform_init(int *error)
{
int rc;
mutex_lock(&sev_cmd_mutex);
rc = __sev_platform_init_locked(error);
mutex_unlock(&sev_cmd_mutex);
return rc;
}
EXPORT_SYMBOL_GPL(sev_platform_init);
static int __sev_platform_shutdown_locked(int *error)
{
int ret;
ret = __sev_do_cmd_locked(SEV_CMD_SHUTDOWN, 0, error);
if (ret)
return ret;
psp_master->sev_state = SEV_STATE_UNINIT;
dev_dbg(psp_master->dev, "SEV firmware shutdown\n");
return ret;
}
static int sev_platform_shutdown(int *error)
{
int rc;
mutex_lock(&sev_cmd_mutex);
rc = __sev_platform_shutdown_locked(NULL);
mutex_unlock(&sev_cmd_mutex);
return rc;
}
static int sev_get_platform_state(int *state, int *error)
{
int rc;
rc = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS,
&psp_master->status_cmd_buf, error);
if (rc)
return rc;
*state = psp_master->status_cmd_buf.state;
return rc;
}
static int sev_ioctl_do_reset(struct sev_issue_cmd *argp)
{
int state, rc;
/*
* The SEV spec requires that FACTORY_RESET must be issued in
* UNINIT state. Before we go further lets check if any guest is
* active.
*
* If FW is in WORKING state then deny the request otherwise issue
* SHUTDOWN command do INIT -> UNINIT before issuing the FACTORY_RESET.
*
*/
rc = sev_get_platform_state(&state, &argp->error);
if (rc)
return rc;
if (state == SEV_STATE_WORKING)
return -EBUSY;
if (state == SEV_STATE_INIT) {
rc = __sev_platform_shutdown_locked(&argp->error);
if (rc)
return rc;
}
return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, 0, &argp->error);
}
static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp)
{
struct sev_user_data_status *data = &psp_master->status_cmd_buf;
int ret;
ret = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, data, &argp->error);
if (ret)
return ret;
if (copy_to_user((void __user *)argp->data, data, sizeof(*data)))
ret = -EFAULT;
return ret;
}
static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp)
{
int rc;
if (psp_master->sev_state == SEV_STATE_UNINIT) {
rc = __sev_platform_init_locked(&argp->error);
if (rc)
return rc;
}
return __sev_do_cmd_locked(cmd, 0, &argp->error);
}
static int sev_ioctl_do_pek_csr(struct sev_issue_cmd *argp)
{
struct sev_user_data_pek_csr input;
struct sev_data_pek_csr *data;
void *blob = NULL;
int ret;
if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
return -EFAULT;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
/* userspace wants to query CSR length */
if (!input.address || !input.length)
goto cmd;
/* allocate a physically contiguous buffer to store the CSR blob */
if (!access_ok(VERIFY_WRITE, input.address, input.length) ||
input.length > SEV_FW_BLOB_MAX_SIZE) {
ret = -EFAULT;
goto e_free;
}
blob = kmalloc(input.length, GFP_KERNEL);
if (!blob) {
ret = -ENOMEM;
goto e_free;
}
data->address = __psp_pa(blob);
data->len = input.length;
cmd:
if (psp_master->sev_state == SEV_STATE_UNINIT) {
ret = __sev_platform_init_locked(&argp->error);
if (ret)
goto e_free_blob;
}
ret = __sev_do_cmd_locked(SEV_CMD_PEK_CSR, data, &argp->error);
/* If we query the CSR length, FW responded with expected data. */
input.length = data->len;
if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) {
ret = -EFAULT;
goto e_free_blob;
}
if (blob) {
if (copy_to_user((void __user *)input.address, blob, input.length))
ret = -EFAULT;
}
e_free_blob:
kfree(blob);
e_free:
kfree(data);
return ret;
}
void *psp_copy_user_blob(u64 __user uaddr, u32 len)
{
void *data;
if (!uaddr || !len)
return ERR_PTR(-EINVAL);
/* verify that blob length does not exceed our limit */
if (len > SEV_FW_BLOB_MAX_SIZE)
return ERR_PTR(-EINVAL);
data = kmalloc(len, GFP_KERNEL);
if (!data)
return ERR_PTR(-ENOMEM);
if (copy_from_user(data, (void __user *)(uintptr_t)uaddr, len))
goto e_free;
return data;
e_free:
kfree(data);
return ERR_PTR(-EFAULT);
}
EXPORT_SYMBOL_GPL(psp_copy_user_blob);
static int sev_ioctl_do_pek_import(struct sev_issue_cmd *argp)
{
struct sev_user_data_pek_cert_import input;
struct sev_data_pek_cert_import *data;
void *pek_blob, *oca_blob;
int ret;
if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
return -EFAULT;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
/* copy PEK certificate blobs from userspace */
pek_blob = psp_copy_user_blob(input.pek_cert_address, input.pek_cert_len);
if (IS_ERR(pek_blob)) {
ret = PTR_ERR(pek_blob);
goto e_free;
}
data->pek_cert_address = __psp_pa(pek_blob);
data->pek_cert_len = input.pek_cert_len;
/* copy PEK certificate blobs from userspace */
oca_blob = psp_copy_user_blob(input.oca_cert_address, input.oca_cert_len);
if (IS_ERR(oca_blob)) {
ret = PTR_ERR(oca_blob);
goto e_free_pek;
}
data->oca_cert_address = __psp_pa(oca_blob);
data->oca_cert_len = input.oca_cert_len;
/* 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_oca;
}
ret = __sev_do_cmd_locked(SEV_CMD_PEK_CERT_IMPORT, data, &argp->error);
e_free_oca:
kfree(oca_blob);
e_free_pek:
kfree(pek_blob);
e_free:
kfree(data);
return ret;
}
static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp)
{
struct sev_user_data_pdh_cert_export input;
void *pdh_blob = NULL, *cert_blob = NULL;
struct sev_data_pdh_cert_export *data;
int ret;
if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
return -EFAULT;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
/* Userspace wants to query the certificate length. */
if (!input.pdh_cert_address ||
!input.pdh_cert_len ||
!input.cert_chain_address)
goto cmd;
/* Allocate a physically contiguous buffer to store the PDH blob. */
if ((input.pdh_cert_len > SEV_FW_BLOB_MAX_SIZE) ||
!access_ok(VERIFY_WRITE, input.pdh_cert_address, input.pdh_cert_len)) {
ret = -EFAULT;
goto e_free;
}
/* Allocate a physically contiguous buffer to store the cert chain blob. */
if ((input.cert_chain_len > SEV_FW_BLOB_MAX_SIZE) ||
!access_ok(VERIFY_WRITE, input.cert_chain_address, input.cert_chain_len)) {
ret = -EFAULT;
goto e_free;
}
pdh_blob = kmalloc(input.pdh_cert_len, GFP_KERNEL);
if (!pdh_blob) {
ret = -ENOMEM;
goto e_free;
}
data->pdh_cert_address = __psp_pa(pdh_blob);
data->pdh_cert_len = input.pdh_cert_len;
cert_blob = kmalloc(input.cert_chain_len, GFP_KERNEL);
if (!cert_blob) {
ret = -ENOMEM;
goto e_free_pdh;
}
data->cert_chain_address = __psp_pa(cert_blob);
data->cert_chain_len = input.cert_chain_len;
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, 0, 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);
}

83
drivers/crypto/ccp/psp-dev.h Normal file
View file

@ -0,0 +1,83 @@
/*
* AMD Platform Security Processor (PSP) interface driver
*
* Copyright (C) 2017 Advanced Micro Devices, Inc.
*
* Author: Brijesh Singh <brijesh.singh@amd.com>
*
* 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_DEV_H__
#define __PSP_DEV_H__
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/dmapool.h>
#include <linux/hw_random.h>
#include <linux/bitops.h>
#include <linux/interrupt.h>
#include <linux/irqreturn.h>
#include <linux/dmaengine.h>
#include <linux/psp-sev.h>
#include <linux/miscdevice.h>
#include "sp-dev.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 PSP_P2CMSG_INTEN 0x0110
#define PSP_P2CMSG_INTSTS 0x0114
#define PSP_C2PMSG_ATTR_0 0x0118
#define PSP_C2PMSG_ATTR_1 0x011c
#define PSP_C2PMSG_ATTR_2 0x0120
#define PSP_C2PMSG_ATTR_3 0x0124
#define PSP_P2CMSG_ATTR_0 0x0128
#define PSP_CMDRESP_CMD_SHIFT 16
#define PSP_CMDRESP_IOC BIT(0)
#define PSP_CMDRESP_RESP BIT(31)
#define PSP_CMDRESP_ERR_MASK 0xffff
#define MAX_PSP_NAME_LEN 16
struct sev_misc_dev {
struct kref refcount;
struct miscdevice misc;
};
struct psp_device {
struct list_head entry;
struct psp_vdata *vdata;
char name[MAX_PSP_NAME_LEN];
struct device *dev;
struct sp_device *sp;
void __iomem *io_regs;
int sev_state;
unsigned int sev_int_rcvd;
wait_queue_head_t sev_int_queue;
struct sev_misc_dev *sev_misc;
struct sev_user_data_status status_cmd_buf;
struct sev_data_init init_cmd_buf;
};
#endif /* __PSP_DEV_H */

35
drivers/crypto/ccp/sp-dev.c
View file

@ -198,6 +198,8 @@ int sp_init(struct sp_device *sp)
if (sp->dev_vdata->ccp_vdata)
ccp_dev_init(sp);
if (sp->dev_vdata->psp_vdata)
psp_dev_init(sp);
return 0;
}
@ -206,6 +208,9 @@ void sp_destroy(struct sp_device *sp)
if (sp->dev_vdata->ccp_vdata)
ccp_dev_destroy(sp);
if (sp->dev_vdata->psp_vdata)
psp_dev_destroy(sp);
sp_del_device(sp);
}
@ -237,6 +242,27 @@ int sp_resume(struct sp_device *sp)
}
#endif
struct sp_device *sp_get_psp_master_device(void)
{
struct sp_device *i, *ret = NULL;
unsigned long flags;
write_lock_irqsave(&sp_unit_lock, flags);
if (list_empty(&sp_units))
goto unlock;
list_for_each_entry(i, &sp_units, entry) {
if (i->psp_data)
break;
}
if (i->get_psp_master_device)
ret = i->get_psp_master_device();
unlock:
write_unlock_irqrestore(&sp_unit_lock, flags);
return ret;
}
static int __init sp_mod_init(void)
{
#ifdef CONFIG_X86
@ -246,6 +272,10 @@ static int __init sp_mod_init(void)
if (ret)
return ret;
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
psp_pci_init();
#endif
return 0;
#endif
@ -265,6 +295,11 @@ static int __init sp_mod_init(void)
static void __exit sp_mod_exit(void)
{
#ifdef CONFIG_X86
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
psp_pci_exit();
#endif
sp_pci_exit();
#endif

28
drivers/crypto/ccp/sp-dev.h
View file

@ -42,12 +42,17 @@ struct ccp_vdata {
const unsigned int offset;
const unsigned int rsamax;
};
struct psp_vdata {
const unsigned int offset;
};
/* Structure to hold SP device data */
struct sp_dev_vdata {
const unsigned int bar;
const struct ccp_vdata *ccp_vdata;
void *psp_vdata;
const struct psp_vdata *psp_vdata;
};
struct sp_device {
@ -68,6 +73,10 @@ struct sp_device {
/* DMA caching attribute support */
unsigned int axcache;
/* get and set master device */
struct sp_device*(*get_psp_master_device)(void);
void (*set_psp_master_device)(struct sp_device *);
bool irq_registered;
bool use_tasklet;
@ -103,6 +112,7 @@ void sp_free_ccp_irq(struct sp_device *sp, void *data);
int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
const char *name, void *data);
void sp_free_psp_irq(struct sp_device *sp, void *data);
struct sp_device *sp_get_psp_master_device(void);
#ifdef CONFIG_CRYPTO_DEV_SP_CCP
@ -130,4 +140,20 @@ static inline int ccp_dev_resume(struct sp_device *sp)
}
#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
int psp_dev_init(struct sp_device *sp);
void psp_pci_init(void);
void psp_dev_destroy(struct sp_device *sp);
void psp_pci_exit(void);
#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
static inline int psp_dev_init(struct sp_device *sp) { return 0; }
static inline void psp_pci_init(void) { }
static inline void psp_dev_destroy(struct sp_device *sp) { }
static inline void psp_pci_exit(void) { }
#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
#endif

52
drivers/crypto/ccp/sp-pci.c
View file

@ -25,6 +25,7 @@
#include <linux/ccp.h>
#include "ccp-dev.h"
#include "psp-dev.h"
#define MSIX_VECTORS 2
@ -32,6 +33,7 @@ struct sp_pci {
int msix_count;
struct msix_entry msix_entry[MSIX_VECTORS];
};
static struct sp_device *sp_dev_master;
static int sp_get_msix_irqs(struct sp_device *sp)
{
@ -108,6 +110,45 @@ static void sp_free_irqs(struct sp_device *sp)
sp->psp_irq = 0;
}
static bool sp_pci_is_master(struct sp_device *sp)
{
struct device *dev_cur, *dev_new;
struct pci_dev *pdev_cur, *pdev_new;
dev_new = sp->dev;
dev_cur = sp_dev_master->dev;
pdev_new = to_pci_dev(dev_new);
pdev_cur = to_pci_dev(dev_cur);
if (pdev_new->bus->number < pdev_cur->bus->number)
return true;
if (PCI_SLOT(pdev_new->devfn) < PCI_SLOT(pdev_cur->devfn))
return true;
if (PCI_FUNC(pdev_new->devfn) < PCI_FUNC(pdev_cur->devfn))
return true;
return false;
}
static void psp_set_master(struct sp_device *sp)
{
if (!sp_dev_master) {
sp_dev_master = sp;
return;
}
if (sp_pci_is_master(sp))
sp_dev_master = sp;
}
static struct sp_device *psp_get_master(void)
{
return sp_dev_master;
}
static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct sp_device *sp;
@ -166,6 +207,8 @@ static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto e_err;
pci_set_master(pdev);
sp->set_psp_master_device = psp_set_master;
sp->get_psp_master_device = psp_get_master;
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
if (ret) {
@ -225,6 +268,12 @@ static int sp_pci_resume(struct pci_dev *pdev)
}
#endif
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
static const struct psp_vdata psp_entry = {
.offset = 0x10500,
};
#endif
static const struct sp_dev_vdata dev_vdata[] = {
{
.bar = 2,
@ -236,6 +285,9 @@ static const struct sp_dev_vdata dev_vdata[] = {
.bar = 2,
#ifdef CONFIG_CRYPTO_DEV_SP_CCP
.ccp_vdata = &ccpv5a,
#endif
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
.psp_vdata = &psp_entry
#endif
},
{