Author: avg
Date: Thu Nov 17 15:17:01 2016
New Revision: 308761
URL: https://svnweb.freebsd.org/changeset/base/308761
Log:
MFC r308218: Add support for microcode update on newer AMD CPUs (10h+)
Added:
stable/10/usr.sbin/cpucontrol/amd10h.c
- copied unchanged from r308218, head/usr.sbin/cpucontrol/amd10h.c
Modified:
stable/10/sys/dev/cpuctl/cpuctl.c
stable/10/usr.sbin/cpucontrol/Makefile
stable/10/usr.sbin/cpucontrol/amd.h
stable/10/usr.sbin/cpucontrol/cpucontrol.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/cpuctl/cpuctl.c
==============================================================================
--- stable/10/sys/dev/cpuctl/cpuctl.c Thu Nov 17 15:16:52 2016
(r308760)
+++ stable/10/sys/dev/cpuctl/cpuctl.c Thu Nov 17 15:17:01 2016
(r308761)
@@ -377,13 +377,24 @@ fail:
return (ret);
}
+/*
+ * NB: MSR 0xc0010020, MSR_K8_UCODE_UPDATE, is not documented by AMD.
+ * Coreboot, illumos and Linux source code was used to understand
+ * its workings.
+ */
+static void
+amd_ucode_wrmsr(void *ucode_ptr)
+{
+ uint32_t tmp[4];
+
+ wrmsr_safe(MSR_K8_UCODE_UPDATE, (uintptr_t)ucode_ptr);
+ do_cpuid(0, tmp);
+}
+
static int
update_amd(int cpu, cpuctl_update_args_t *args, struct thread *td)
{
- void *ptr = NULL;
- uint32_t tmp[4];
- int is_bound = 0;
- int oldcpu;
+ void *ptr;
int ret;
if (args->size == 0 || args->data == NULL) {
@@ -394,41 +405,23 @@ update_amd(int cpu, cpuctl_update_args_t
DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
return (EINVAL);
}
+
/*
- * XXX Might not require contignous address space - needs check
+ * 16 byte alignment required. Rely on the fact that
+ * malloc(9) always returns the pointer aligned at least on
+ * the size of the allocation.
*/
- ptr = contigmalloc(args->size, M_CPUCTL, 0, 0, 0xffffffff, 16, 0);
- if (ptr == NULL) {
- DPRINTF("[cpuctl,%d]: cannot allocate %zd bytes of memory",
- __LINE__, args->size);
- return (ENOMEM);
- }
+ ptr = malloc(args->size + 16, M_CPUCTL, M_ZERO | M_WAITOK);
if (copyin(args->data, ptr, args->size) != 0) {
DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
__LINE__, args->data, ptr, args->size);
ret = EFAULT;
goto fail;
}
- oldcpu = td->td_oncpu;
- is_bound = cpu_sched_is_bound(td);
- set_cpu(cpu, td);
- critical_enter();
-
- /*
- * Perform update.
- */
- wrmsr_safe(MSR_K8_UCODE_UPDATE, (uintptr_t)ptr);
-
- /*
- * Serialize instruction flow.
- */
- do_cpuid(0, tmp);
- critical_exit();
- restore_cpu(oldcpu, is_bound, td);
+ smp_rendezvous(NULL, amd_ucode_wrmsr, NULL, ptr);
ret = 0;
fail:
- if (ptr != NULL)
- contigfree(ptr, args->size, M_CPUCTL);
+ free(ptr, M_CPUCTL);
return (ret);
}
Modified: stable/10/usr.sbin/cpucontrol/Makefile
==============================================================================
--- stable/10/usr.sbin/cpucontrol/Makefile Thu Nov 17 15:16:52 2016
(r308760)
+++ stable/10/usr.sbin/cpucontrol/Makefile Thu Nov 17 15:17:01 2016
(r308761)
@@ -2,7 +2,7 @@
PROG= cpucontrol
MAN= cpucontrol.8
-SRCS= cpucontrol.c intel.c amd.c via.c
+SRCS= cpucontrol.c intel.c amd.c amd10h.c via.c
NO_WCAST_ALIGN=
Modified: stable/10/usr.sbin/cpucontrol/amd.h
==============================================================================
--- stable/10/usr.sbin/cpucontrol/amd.h Thu Nov 17 15:16:52 2016
(r308760)
+++ stable/10/usr.sbin/cpucontrol/amd.h Thu Nov 17 15:17:01 2016
(r308761)
@@ -33,6 +33,8 @@
*/
ucode_probe_t amd_probe;
ucode_update_t amd_update;
+ucode_probe_t amd10h_probe;
+ucode_update_t amd10h_update;
typedef struct amd_fw_header {
uint32_t date; /* Update creation date. */
@@ -46,4 +48,45 @@ typedef struct amd_fw_header {
#define AMD_MAGIC 0xaaaaaa
+/*
+ * AMD family 10h and later.
+ */
+typedef struct amd_10h_fw_header {
+ uint32_t data_code;
+ uint32_t patch_id;
+ uint16_t mc_patch_data_id;
+ uint8_t mc_patch_data_len;
+ uint8_t init_flag;
+ uint32_t mc_patch_data_checksum;
+ uint32_t nb_dev_id;
+ uint32_t sb_dev_id;
+ uint16_t processor_rev_id;
+ uint8_t nb_rev_id;
+ uint8_t sb_rev_id;
+ uint8_t bios_api_rev;
+ uint8_t reserved1[3];
+ uint32_t match_reg[8];
+} amd_10h_fw_header_t;
+
+typedef struct equiv_cpu_entry {
+ uint32_t installed_cpu;
+ uint32_t fixed_errata_mask;
+ uint32_t fixed_errata_compare;
+ uint16_t equiv_cpu;
+ uint16_t res;
+} equiv_cpu_entry_t;
+
+typedef struct section_header {
+ uint32_t type;
+ uint32_t size;
+} section_header_t;
+
+typedef struct container_header {
+ uint32_t magic;
+} container_header_t;
+
+#define AMD_10H_MAGIC 0x414d44
+#define AMD_10H_EQUIV_TABLE_TYPE 0
+#define AMD_10H_uCODE_TYPE 1
+
#endif /* !AMD_H */
Copied: stable/10/usr.sbin/cpucontrol/amd10h.c (from r308218,
head/usr.sbin/cpucontrol/amd10h.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/usr.sbin/cpucontrol/amd10h.c Thu Nov 17 15:17:01 2016
(r308761, copy of r308218, head/usr.sbin/cpucontrol/amd10h.c)
@@ -0,0 +1,307 @@
+/*-
+ * Copyright (c) 2012 Andriy Gapon <a...@freebsd.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <sys/ioccom.h>
+#include <sys/cpuctl.h>
+
+#include <machine/cpufunc.h>
+#include <machine/specialreg.h>
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <err.h>
+
+#include "cpucontrol.h"
+#include "amd.h"
+
+int
+amd10h_probe(int fd)
+{
+ char vendor[13];
+ cpuctl_cpuid_args_t idargs;
+ uint32_t family;
+ uint32_t signature;
+ int error;
+
+ idargs.level = 0;
+ error = ioctl(fd, CPUCTL_CPUID, &idargs);
+ if (error < 0) {
+ WARN(0, "ioctl()");
+ return (1);
+ }
+ ((uint32_t *)vendor)[0] = idargs.data[1];
+ ((uint32_t *)vendor)[1] = idargs.data[3];
+ ((uint32_t *)vendor)[2] = idargs.data[2];
+ vendor[12] = '\0';
+ if (strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
+ return (1);
+
+ idargs.level = 1;
+ error = ioctl(fd, CPUCTL_CPUID, &idargs);
+ if (error < 0) {
+ WARN(0, "ioctl()");
+ return (1);
+ }
+ signature = idargs.data[0];
+ family = ((signature >> 8) & 0x0f) + ((signature >> 20) & 0xff);
+ if (family < 0x10)
+ return (1);
+ return (0);
+}
+
+/*
+ * NB: the format of microcode update files is not documented by AMD.
+ * It has been reverse engineered from studying Coreboot, illumos and Linux
+ * source code.
+ */
+void
+amd10h_update(const char *dev, const char *path)
+{
+ struct stat st;
+ cpuctl_cpuid_args_t idargs;
+ cpuctl_msr_args_t msrargs;
+ cpuctl_update_args_t args;
+ const amd_10h_fw_header_t *fw_header;
+ const amd_10h_fw_header_t *selected_fw;
+ const equiv_cpu_entry_t *equiv_cpu_table;
+ const section_header_t *section_header;
+ const container_header_t *container_header;
+ const uint8_t *fw_data;
+ uint8_t *fw_image;
+ size_t fw_size;
+ size_t selected_size;
+ uint32_t revision;
+ uint32_t new_rev;
+ uint32_t signature;
+ uint16_t equiv_id;
+ int fd, devfd;
+ unsigned int i;
+ int error;
+
+ assert(path);
+ assert(dev);
+
+ fd = -1;
+ fw_image = MAP_FAILED;
+ devfd = open(dev, O_RDWR);
+ if (devfd < 0) {
+ WARN(0, "could not open %s for writing", dev);
+ return;
+ }
+ idargs.level = 1;
+ error = ioctl(devfd, CPUCTL_CPUID, &idargs);
+ if (error < 0) {
+ WARN(0, "ioctl()");
+ goto done;
+ }
+ signature = idargs.data[0];
+
+ msrargs.msr = 0x0000008b;
+ error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
+ if (error < 0) {
+ WARN(0, "ioctl(%s)", dev);
+ goto done;
+ }
+ revision = (uint32_t)msrargs.data;
+
+ WARNX(1, "found cpu family %#x model %#x "
+ "stepping %#x extfamily %#x extmodel %#x.",
+ (signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
+ (signature >> 0) & 0x0f, (signature >> 20) & 0xff,
+ (signature >> 16) & 0x0f);
+ WARNX(1, "microcode revision %#x", revision);
+
+ /*
+ * Open the firmware file.
+ */
+ fd = open(path, O_RDONLY, 0);
+ if (fd < 0) {
+ WARN(0, "open(%s)", path);
+ goto done;
+ }
+ error = fstat(fd, &st);
+ if (error != 0) {
+ WARN(0, "fstat(%s)", path);
+ goto done;
+ }
+ if (st.st_size < 0 || (size_t)st.st_size <
+ (sizeof(*container_header) + sizeof(*section_header))) {
+ WARNX(2, "file too short: %s", path);
+ goto done;
+ }
+ fw_size = st.st_size;
+
+ /*
+ * mmap the whole image.
+ */
+ fw_image = (uint8_t *)mmap(NULL, st.st_size, PROT_READ,
+ MAP_PRIVATE, fd, 0);
+ if (fw_image == MAP_FAILED) {
+ WARN(0, "mmap(%s)", path);
+ goto done;
+ }
+
+ fw_data = fw_image;
+ container_header = (const container_header_t *)fw_data;
+ if (container_header->magic != AMD_10H_MAGIC) {
+ WARNX(2, "%s is not a valid amd firmware: bad magic", path);
+ goto done;
+ }
+ fw_data += sizeof(*container_header);
+ fw_size -= sizeof(*container_header);
+
+ section_header = (const section_header_t *)fw_data;
+ if (section_header->type != AMD_10H_EQUIV_TABLE_TYPE) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "first section is not CPU equivalence table", path);
+ goto done;
+ }
+ if (section_header->size == 0) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "first section is empty", path);
+ goto done;
+ }
+ fw_data += sizeof(*section_header);
+ fw_size -= sizeof(*section_header);
+
+ if (section_header->size > fw_size) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "file is truncated", path);
+ goto done;
+ }
+ if (section_header->size < sizeof(*equiv_cpu_table)) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "first section is too short", path);
+ goto done;
+ }
+ equiv_cpu_table = (const equiv_cpu_entry_t *)fw_data;
+ fw_data += section_header->size;
+ fw_size -= section_header->size;
+
+ equiv_id = 0;
+ for (i = 0; equiv_cpu_table[i].installed_cpu != 0; i++) {
+ if (signature == equiv_cpu_table[i].installed_cpu) {
+ equiv_id = equiv_cpu_table[i].equiv_cpu;
+ WARNX(3, "equiv_id: %x", equiv_id);
+ break;
+ }
+ }
+ if (equiv_id == 0) {
+ WARNX(2, "CPU is not found in the equivalence table");
+ goto done;
+ }
+
+ selected_fw = NULL;
+ selected_size = 0;
+ while (fw_size >= sizeof(*section_header)) {
+ section_header = (const section_header_t *)fw_data;
+ fw_data += sizeof(*section_header);
+ fw_size -= sizeof(*section_header);
+ if (section_header->type != AMD_10H_uCODE_TYPE) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "section has incorret type", path);
+ goto done;
+ }
+ if (section_header->size > fw_size) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "file is truncated", path);
+ goto done;
+ }
+ if (section_header->size < sizeof(*fw_header)) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "section is too short", path);
+ goto done;
+ }
+ fw_header = (const amd_10h_fw_header_t *)fw_data;
+ fw_data += section_header->size;
+ fw_size -= section_header->size;
+
+ if (fw_header->processor_rev_id != equiv_id)
+ continue; /* different cpu */
+ if (fw_header->patch_id <= revision)
+ continue; /* not newer revision */
+ if (fw_header->nb_dev_id != 0 || fw_header->sb_dev_id != 0) {
+ WARNX(2, "Chipset-specific microcode is not supported");
+ }
+
+ WARNX(3, "selecting revision: %x", fw_header->patch_id);
+ revision = fw_header->patch_id;
+ selected_fw = fw_header;
+ selected_size = section_header->size;
+ }
+
+ if (fw_size != 0) {
+ WARNX(2, "%s is not a valid amd firmware: "
+ "file is truncated", path);
+ goto done;
+ }
+
+ if (selected_fw != NULL) {
+ WARNX(1, "selected ucode size is %zu", selected_size);
+ fprintf(stderr, "%s: updating cpu %s to revision %#x... ",
+ path, dev, revision);
+
+ args.data = __DECONST(void *, selected_fw);
+ args.size = selected_size;
+ error = ioctl(devfd, CPUCTL_UPDATE, &args);
+ if (error < 0) {
+ fprintf(stderr, "failed.\n");
+ warn("ioctl()");
+ goto done;
+ }
+ fprintf(stderr, "done.\n");
+ }
+
+ msrargs.msr = 0x0000008b;
+ error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
+ if (error < 0) {
+ WARN(0, "ioctl(%s)", dev);
+ goto done;
+ }
+ new_rev = (uint32_t)msrargs.data;
+ if (new_rev != revision)
+ WARNX(0, "revision after update %#x", new_rev);
+
+done:
+ if (fd >= 0)
+ close(fd);
+ if (devfd >= 0)
+ close(devfd);
+ if (fw_image != MAP_FAILED)
+ if (munmap(fw_image, st.st_size) != 0)
+ warn("munmap(%s)", path);
+ return;
+}
Modified: stable/10/usr.sbin/cpucontrol/cpucontrol.c
==============================================================================
--- stable/10/usr.sbin/cpucontrol/cpucontrol.c Thu Nov 17 15:16:52 2016
(r308760)
+++ stable/10/usr.sbin/cpucontrol/cpucontrol.c Thu Nov 17 15:17:01 2016
(r308761)
@@ -91,6 +91,7 @@ static struct ucode_handler {
ucode_update_t *update;
} handlers[] = {
{ intel_probe, intel_update },
+ { amd10h_probe, amd10h_update },
{ amd_probe, amd_update },
{ via_probe, via_update },
};
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