Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=54810342f1372afdaf6cb9a6aea0c35df187db12
Commit: 54810342f1372afdaf6cb9a6aea0c35df187db12
Parent: d92899a0014aa795c21d3cf726ef5ff7684399f4
Author: Dor Laor <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 12 00:54:39 2007 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Mon Feb 12 09:48:40 2007 -0800
[PATCH] kvm: Two-way apic tpr synchronization
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]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/kvm/kvm_main.c | 3 +++
include/linux/kvm.h | 2 ++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 099f0af..eb3931c 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1360,6 +1360,9 @@ static int kvm_dev_ioctl_run(struct kvm *kvm, struct
kvm_run *kvm_run)
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 --git a/include/linux/kvm.h b/include/linux/kvm.h
index 1be148f..6a5f6f4 100644
--- a/include/linux/kvm.h
+++ b/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;
-
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