The patch titled
lguest: fix guest crash when CONFIG_X86_USE_3DNOW=y
has been removed from the -mm tree. Its filename was
lguest-fix-guest-crash-when-config_x86_use_3dnow=y.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: lguest: fix guest crash when CONFIG_X86_USE_3DNOW=y
From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
One of the very first things lguest_init() does is a memcpy. On
Athlon/Duron/K7 or CyrixIII/VIA-C3 or Geode GX/LX, this tries to use MMX.
memcpy -> _mmx_memcpy -> kernel_fpu_begin -> clts -> paravirt_ops.clts
But we haven't set paravirt_ops.clts yet, so we do the native version
and crash. The simplest solution is to use __memcpy.
Thanks to Michael Rasenberger for the bug report.
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Michael Rasenberger <michael.rasenberger@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/lguest/lguest.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN drivers/lguest/lguest.c~lguest-fix-guest-crash-when-config_x86_use_3dnow=y drivers/lguest/lguest.c
--- a/drivers/lguest/lguest.c~lguest-fix-guest-crash-when-config_x86_use_3dnow=y
+++ a/drivers/lguest/lguest.c
@@ -964,11 +964,12 @@ __init void lguest_init(void *boot)
{
/* Copy boot parameters first: the Launcher put the physical location
* in %esi, and head.S converted that to a virtual address and handed
- * it to us. */
- memcpy(&boot_params, boot, PARAM_SIZE);
+ * it to us. We use "__memcpy" because "memcpy" sometimes tries to do
+ * tricky things to go faster, and we're not ready for that. */
+ __memcpy(&boot_params, boot, PARAM_SIZE);
/* The boot parameters also tell us where the command-line is: save
* that, too. */
- memcpy(boot_command_line, __va(boot_params.hdr.cmd_line_ptr),
+ __memcpy(boot_command_line, __va(boot_params.hdr.cmd_line_ptr),
COMMAND_LINE_SIZE);
/* We're under lguest, paravirt is enabled, and we're running at
_
Patches currently in -mm which might be from rusty@xxxxxxxxxxxxxxx are
origin.patch
git-kvm.patch
enforce-noreplace-smp-in-alternative_instructions.patch
readahead-compacting-file_ra_state.patch
readahead-mmap-read-around-simplification.patch
readahead-combine-file_ra_stateprev_index-prev_offset-into-prev_pos.patch
readahead-combine-file_ra_stateprev_index-prev_offset-into-prev_pos-fix.patch
readahead-combine-file_ra_stateprev_index-prev_offset-into-prev_pos-fix-2.patch
radixtree-introduce-radix_tree_next_hole.patch
readahead-basic-support-of-interleaved-reads.patch
readahead-remove-the-local-copy-of-ra-in-do_generic_mapping_read.patch
readahead-remove-several-readahead-macros.patch
readahead-remove-the-limit-max_sectors_kb-imposed-on-max_readahead_kb.patch
filemap-trivial-code-cleanups.patch
filemap-convert-some-unsigned-long-to-pgoff_t.patch
mmaps2-vma-out-of-mem_size_stats.patch
maps2-make-proc-pid-smaps-optional-under-config_embeddedpatch.patch
maps2-make-proc-pid-smaps-optional-under-config_embeddedpatch-fix.patch
remove-unsafe-from-module-struct.patch
modpost-detect-unterminated-device-id-lists.patch
modpost-detect-unterminated-device-id-lists-fix.patch
cpu-hotplug-cpu-deliver-cpu_up_canceled-only-to-notify_oked-callbacks-with-cpu_up_prepare.patch
mm-clean-up-and-kernelify-shrinker-registration-reiser4.patch
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