diff options
| author | Dor Laor <dor.laor@qumranet.com> | 2007-02-12 09:54:39 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 18:48:40 +0100 |
| commit | 54810342f1372afdaf6cb9a6aea0c35df187db12 (patch) | |
| tree | 97775733e60a5875f88f30c38a69ba278479299a | |
| parent | [PATCH] kvm: SVM: Hack initial cpu csbase to be consistent with intel (diff) | |
| download | linux-54810342f1372afdaf6cb9a6aea0c35df187db12.tar.xz linux-54810342f1372afdaf6cb9a6aea0c35df187db12.zip | |
[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 <dor.laor@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/kvm/kvm_main.c | 3 | ||||
| -rw-r--r-- | 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 099f0afd394d..eb3931ca680a 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 1be148f0fce4..6a5f6f49e037 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; |