Patchwork [02/27] Pass PVR in sregs

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Submitter Alexander Graf
Date Oct. 30, 2009, 3:47 p.m.
Message ID <1256917647-6200-3-git-send-email-agraf@suse.de>
Download mbox | patch
Permalink /patch/37319/
State Accepted, archived
Commit ec3c11aa5f9d0a7f48f46d6790c33ccc654fd6ec
Delegated to: Benjamin Herrenschmidt
Headers show

Comments

Alexander Graf - Oct. 30, 2009, 3:47 p.m.
Right now sregs is unused on PPC, so we can use it for initialization
of the CPU.

KVM on BookE always virtualizes the host CPU. On Book3s we go a step further
and take the PVR from userspace that tells us what kind of CPU we are supposed
to virtualize, because we support Book3s_32 and Book3s_64 guests.

In order to get that information, we use the sregs ioctl, because we don't
want to reset the guest CPU on every normal register set.

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v4 -> v5

  - make PVR 32 bits
---
 arch/powerpc/include/asm/kvm.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/powerpc/include/asm/kvm.h b/arch/powerpc/include/asm/kvm.h
index bb2de6a..c9ca97f 100644
--- a/arch/powerpc/include/asm/kvm.h
+++ b/arch/powerpc/include/asm/kvm.h
@@ -46,6 +46,8 @@  struct kvm_regs {
 };
 
 struct kvm_sregs {
+	__u32 pvr;
+	char pad[1020];
 };
 
 struct kvm_fpu {