The patch titled
xen-paravirt_ops: add early printk support via hvc console
has been added to the -mm tree. Its filename is
xen-paravirt_ops-add-early-printk-support-via-hvc-console.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: xen-paravirt_ops: add early printk support via hvc console
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Add early printk support via hvc console, enable using "earlyprintk=xen" on
the kernel command line.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86_64/kernel/early_printk.c | 5 +++++
drivers/xen/hvc-console.c | 25 +++++++++++++++++++++++++
include/xen/hvc-console.h | 6 ++++++
3 files changed, 36 insertions(+)
diff -puN arch/x86_64/kernel/early_printk.c~xen-paravirt_ops-add-early-printk-support-via-hvc-console arch/x86_64/kernel/early_printk.c
--- a/arch/x86_64/kernel/early_printk.c~xen-paravirt_ops-add-early-printk-support-via-hvc-console
+++ a/arch/x86_64/kernel/early_printk.c
@@ -6,6 +6,7 @@
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/fcntl.h>
+#include <xen/hvc-console.h>
/* Simple VGA output */
@@ -243,6 +244,10 @@ static int __init setup_early_printk(cha
simnow_init(buf + 6);
early_console = &simnow_console;
keep_early = 1;
+#ifdef CONFIG_XEN
+ } else if (!strncmp(buf, "xen", 3)) {
+ early_console = &xenboot_console;
+#endif
}
register_console(early_console);
return 0;
diff -puN drivers/xen/hvc-console.c~xen-paravirt_ops-add-early-printk-support-via-hvc-console drivers/xen/hvc-console.c
--- a/drivers/xen/hvc-console.c~xen-paravirt_ops-add-early-printk-support-via-hvc-console
+++ a/drivers/xen/hvc-console.c
@@ -28,6 +28,7 @@
#include <xen/page.h>
#include <xen/events.h>
#include <xen/interface/io/console.h>
+#include <xen/hvc-console.h>
#include "../char/hvc_console.h"
@@ -132,3 +133,27 @@ static int xen_cons_init(void)
module_init(xen_init);
module_exit(xen_fini);
console_initcall(xen_cons_init);
+
+static void xenboot_write_console(struct console *console, const char *string,
+ unsigned len)
+{
+ unsigned int linelen, off = 0;
+ const char *pos;
+
+ while (off < len && NULL != (pos = strchr(string+off, '\n'))) {
+ linelen = pos-string+off;
+ if (off + linelen > len)
+ break;
+ write_console(0, string+off, linelen);
+ write_console(0, "\r\n", 2);
+ off += linelen + 1;
+ }
+ if (off < len)
+ write_console(0, string+off, len-off);
+}
+
+struct console xenboot_console = {
+ .name = "xenboot",
+ .write = xenboot_write_console,
+ .flags = CON_PRINTBUFFER | CON_BOOT,
+};
diff -puN /dev/null include/xen/hvc-console.h
--- /dev/null
+++ a/include/xen/hvc-console.h
@@ -0,0 +1,6 @@
+#ifndef XEN_HVC_CONSOLE_H
+#define XEN_HVC_CONSOLE_H
+
+extern struct console xenboot_console;
+
+#endif /* XEN_HVC_CONSOLE_H */
_
Patches currently in -mm which might be from jeremy@xxxxxxxx are
xen-paravirt_ops-fix-typo-in-sync_constant_test_bits-name.patch
xen-paravirt_ops-use-paravirt_nop-to-consistently-mark-no-op-operations.patch
xen-paravirt_ops-add-pagetable-accessors-to-pack-and-unpack-pagetable-entries.patch
xen-paravirt_ops-paravirt_ops-hooks-to-set-up-initial-pagetable.patch
xen-paravirt_ops-paravirt_ops-allocate-a-fixmap-slot.patch
xen-paravirt_ops-allow-paravirt-backend-to-choose-kernel-pmd-sharing.patch
xen-paravirt_ops-add-hooks-to-intercept-mm-creation-and-destruction.patch
xen-paravirt_ops-remove-have_arch_mm_lifetime-define-no-op-architecture-implementations.patch
xen-paravirt_ops-rename-struct-paravirt_patch-to-paravirt_patch_site-for-clarity.patch
xen-paravirt_ops-use-patch-site-ids-computed-from-offset-in-paravirt_ops-structure.patch
xen-paravirt_ops-fix-patch-site-clobbers-to-include-return-register.patch
xen-paravirt_ops-consistently-wrap-paravirt-ops-callsites-to-make-them-patchable.patch
xen-paravirt_ops-add-common-patching-machinery.patch
xen-paravirt_ops-add-apply_to_page_range-which-applies-a-function-to-a-pte-range.patch
xen-paravirt_ops-allocate-and-free-vmalloc-areas.patch
xen-paravirt_ops-add-nosegneg-capability-to-the-vsyscall-page-notes.patch
xen-paravirt_ops-add-xen-config-options.patch
xen-paravirt_ops-add-xen-interface-header-files.patch
xen-paravirt_ops-core-xen-implementation.patch
xen-paravirt_ops-use-the-hvc-console-infrastructure-for-xen-console.patch
xen-paravirt_ops-add-early-printk-support-via-hvc-console.patch
xen-paravirt_ops-add-xen-grant-table-support.patch
xen-paravirt_ops-add-the-xenbus-sysfs-and-virtual-device-hotplug-driver.patch
xen-paravirt_ops-add-xen-virtual-block-device-driver.patch
xen-paravirt_ops-add-the-xen-virtual-network-device-driver.patch
fixes-and-cleanups-for-earlyprintk-aka-boot-console.patch
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