The patch titled
kvm: Two-way apic tpr synchronization
has been added to the -mm tree. Its filename is
kvm-two-way-apic-tpr-synchronization.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: kvm: Two-way apic tpr synchronization
From: Dor Laor <[EMAIL PROTECTED]>
We report the value of cr8 to userspace on an exit. Also let userspace change
cr8 when we re-enter the guest. The lets 64-bit guest code maintain the tpr
correctly.
Thanks for Yaniv Kamay for the idea.
Signed-off-by: Dor Laor <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/kvm/kvm_main.c | 3 +++
include/linux/kvm.h | 2 ++
2 files changed, 5 insertions(+)
diff -puN drivers/kvm/kvm_main.c~kvm-two-way-apic-tpr-synchronization
drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c~kvm-two-way-apic-tpr-synchronization
+++ a/drivers/kvm/kvm_main.c
@@ -1360,6 +1360,9 @@ static int kvm_dev_ioctl_run(struct kvm
if (!vcpu)
return -ENOENT;
+ /* re-sync apic's tpr */
+ vcpu->cr8 = kvm_run->cr8;
+
if (kvm_run->emulated) {
kvm_arch_ops->skip_emulated_instruction(vcpu);
kvm_run->emulated = 0;
diff -puN include/linux/kvm.h~kvm-two-way-apic-tpr-synchronization
include/linux/kvm.h
--- a/include/linux/kvm.h~kvm-two-way-apic-tpr-synchronization
+++ a/include/linux/kvm.h
@@ -65,6 +65,8 @@ struct kvm_run {
__u8 ready_for_interrupt_injection;
__u8 if_flag;
__u16 padding2;
+
+ /* in (pre_kvm_run), out (post_kvm_run) */
__u64 cr8;
__u64 apic_base;
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
kvm-two-way-apic-tpr-synchronization.patch
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