Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d37c85571904a622cbabc7a2e04b8c919de75ac0
Commit: d37c85571904a622cbabc7a2e04b8c919de75ac0
Parent: 4c981b43d7ec18818754bf85b829865abd0ce340
Author: Aurelien Jarno <[EMAIL PROTECTED]>
AuthorDate: Wed Jul 25 10:19:54 2007 +0200
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Wed Jul 25 14:31:27 2007 +0300
KVM: disable writeback for 0x0f 0x01 instructions.
0x0f 0x01 instructions (ie lgdt, lidt, smsw, lmsw and invlpg) does
not use writeback. This patch set no_wb=1 when emulating those
instructions.
This fixes a regression booting the FreeBSD kernel on AMD.
Signed-off-by: Aurelien Jarno <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/x86_emulate.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 1b800fc..1f979cb 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -1178,6 +1178,8 @@ pop_instruction:
twobyte_insn:
switch (b) {
case 0x01: /* lgdt, lidt, lmsw */
+ /* Disable writeback. */
+ no_wb = 1;
switch (modrm_reg) {
u16 size;
unsigned long address;
-
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