Split up microcode files for the kernel to autoload (using util from Fedora).

(Portage version: 2.2.0_alpha79/cvs/Linux x86_64)

3 files changed, 212 insertions, 1 deletions

diff --git a/sys-apps/microcode-data/ChangeLog b/sys-apps/microcode-data/ChangeLog
index e55107af1e9a..14186bec96c9 100644
--- a/sys-apps/microcode-data/ChangeLog
+++ b/sys-apps/microcode-data/ChangeLog
@@ -1,6 +1,12 @@
 # ChangeLog for sys-apps/microcode-data
 # Copyright 1999-2011 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/sys-apps/microcode-data/ChangeLog,v 1.15 2011/09/22 20:26:48 flameeyes Exp $
+# $Header: /var/cvsroot/gentoo-x86/sys-apps/microcode-data/ChangeLog,v 1.16 2011/12/12 21:34:38 vapier Exp $
+
+*microcode-data-20110915-r1 (12 Dec 2011)
+
+  12 Dec 2011; Mike Frysinger <vapier@gentoo.org>
+  +files/intel-microcode2ucode.c, +microcode-data-20110915-r1.ebuild:
+  Split up microcode files for the kernel to autoload (using util from Fedora).
 
 *microcode-data-20110915 (22 Sep 2011)
 
diff --git a/sys-apps/microcode-data/files/intel-microcode2ucode.c b/sys-apps/microcode-data/files/intel-microcode2ucode.c
new file mode 100644
index 000000000000..caad0323e805
--- /dev/null
+++ b/sys-apps/microcode-data/files/intel-microcode2ucode.c
@@ -0,0 +1,163 @@
+/*
+ * Convert Intel microcode.dat into individual ucode files
+ * named: intel-ucode/$family-$model-$stepping
+ *
+ * The subdir intel-ucode/ is created in the current working
+ * directory. We get multiple ucodes in the same file, so they
+ * are appended to an existing file. Make sure the directory
+ * is empty before every run of the converter.
+ *
+ * Kay Sievers <kay.sievers@vrfy.org>
+ */
+
+
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+struct microcode_header_intel {
+	unsigned int hdrver;
+	unsigned int rev;
+	unsigned int date;
+	unsigned int sig;
+	unsigned int cksum;
+	unsigned int ldrver;
+	unsigned int pf;
+	unsigned int datasize;
+	unsigned int totalsize;
+	unsigned int reserved[3];
+};
+
+union mcbuf {
+	struct microcode_header_intel hdr;
+	unsigned int i[0];
+	char c[0];
+};
+
+int main(int argc, char *argv[])
+{
+	char *filename = "/lib/firmware/microcode.dat";
+	FILE *f;
+	char line[LINE_MAX];
+	char buf[4000000];
+	union mcbuf *mc;
+	size_t bufsize, count, start;
+	int rc = EXIT_SUCCESS;
+
+	if (argv[1] != NULL)
+		filename = argv[1];
+
+	count = 0;
+	mc = (union mcbuf *) buf;
+	f = fopen(filename, "re");
+	if (f == NULL) {
+		printf("open %s: %m\n", filename);
+		rc = EXIT_FAILURE;
+		goto out;
+	}
+
+	while (fgets(line, sizeof(line), f) != NULL) {
+		if (sscanf(line, "%x, %x, %x, %x",
+		    &mc->i[count],
+		    &mc->i[count + 1],
+		    &mc->i[count + 2],
+		    &mc->i[count + 3]) != 4)
+			continue;
+		count += 4;
+	}
+	fclose(f);
+
+	bufsize = count * sizeof(int);
+	printf("%s: %lu(%luk) bytes, %zu integers\n",
+	       filename,
+	       bufsize,
+	       bufsize / 1024,
+	       count);
+
+	if (bufsize < sizeof(struct microcode_header_intel))
+		goto out;
+
+	mkdir("intel-ucode", 0750);
+
+	start = 0;
+	for (;;) {
+		size_t size;
+		unsigned int family, model, stepping;
+		unsigned int year, month, day;
+
+		mc = (union mcbuf *) &buf[start];
+
+		if (mc->hdr.totalsize)
+			size = mc->hdr.totalsize;
+		else
+			size = 2000 + sizeof(struct microcode_header_intel);
+
+		if (mc->hdr.ldrver != 1 || mc->hdr.hdrver != 1) {
+			printf("unknown version/format:\n");
+			rc = EXIT_FAILURE;
+			break;
+		}
+
+		/*
+		 *  0- 3 stepping
+		 *  4- 7 model
+		 *  8-11 family
+		 * 12-13 type
+		 * 16-19 extended model
+		 * 20-27 extended family
+		 */
+		family = (mc->hdr.sig >> 8) & 0xf;
+		if (family == 0xf)
+			family += (mc->hdr.sig >> 20) & 0xff;
+		model = (mc->hdr.sig >> 4) & 0x0f;
+		if (family == 0x06)
+			model += ((mc->hdr.sig >> 16) & 0x0f) << 4;
+		stepping = mc->hdr.sig & 0x0f;
+
+		year = mc->hdr.date & 0xffff;
+		month = mc->hdr.date >> 24;
+		day = (mc->hdr.date >> 16) & 0xff;
+
+		asprintf(&filename, "intel-ucode/%02x-%02x-%02x", family, model, stepping);
+		printf("\n");
+		printf("%s\n", filename);
+		printf("signature: 0x%02x\n", mc->hdr.sig);
+		printf("flags:     0x%02x\n", mc->hdr.pf);
+		printf("revision:  0x%02x\n", mc->hdr.rev);
+		printf("date:      %04x-%02x-%02x\n", year, month, day);
+		printf("size:      %zu\n", size);
+
+		f = fopen(filename, "ae");
+		if (f == NULL) {
+			printf("open %s: %m\n", filename);
+			rc = EXIT_FAILURE;
+			goto out;
+		}
+		if (fwrite(mc, size, 1, f) != 1) {
+			printf("write %s: %m\n", filename);
+			rc = EXIT_FAILURE;
+			goto out;
+		}
+		fclose(f);
+		free(filename);
+
+		start += size;
+		if (start >= bufsize)
+			break;
+	}
+	printf("\n");
+out:
+	return rc;
+}
diff --git a/sys-apps/microcode-data/microcode-data-20110915-r1.ebuild b/sys-apps/microcode-data/microcode-data-20110915-r1.ebuild
new file mode 100644
index 000000000000..ddab8d4ac863
--- /dev/null
+++ b/sys-apps/microcode-data/microcode-data-20110915-r1.ebuild
@@ -0,0 +1,42 @@
+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/sys-apps/microcode-data/microcode-data-20110915-r1.ebuild,v 1.1 2011/12/12 21:34:38 vapier Exp $
+
+EAPI=4
+
+inherit toolchain-funcs
+
+NUM="20429"
+DESCRIPTION="Intel IA32 microcode update data"
+HOMEPAGE="http://urbanmyth.org/microcode/"
+SRC_URI="http://downloadmirror.intel.com/${NUM}/eng/microcode-${PV}.tgz"
+
+LICENSE="intel-ucode"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE=""
+
+RDEPEND="!<sys-apps/microcode-ctl-1.17-r2" #268586
+
+S=${WORKDIR}
+
+src_unpack() {
+	unpack ${A}
+	cp "${FILESDIR}"/intel-microcode2ucode.c ./ || die
+}
+
+src_compile() {
+	tc-env_build emake intel-microcode2ucode
+	./intel-microcode2ucode microcode.dat || die
+}
+
+src_install() {
+	insinto /lib/firmware
+	doins -r microcode.dat intel-ucode
+}
+
+pkg_postinst() {
+	elog "The microcode available for Intel CPUs has been updated.  You'll need"
+	elog "to reload the code into your processor.  If you're using the init.d:"
+	elog "/etc/init.d/microcode_ctl restart"
+}