On 04/13/2012 06:07 AM, Varun Sethi wrote:
For Guest accessible SPRGs 4-7, save/restore must be handled differently for
64bit and
non-64 bit case. The registers are maintained as 64 bit copies by KVM. While
saving/restoring
for the non-64 bit case we should always take the lower 4 bytes.
Signed-off-by: Varun Sethi<[email protected]>
---
arch/powerpc/kvm/bookehv_interrupts.S | 24 ++++++++++++++++--------
1 files changed, 16 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/kvm/bookehv_interrupts.S
b/arch/powerpc/kvm/bookehv_interrupts.S
index 909e96e..98751af 100644
--- a/arch/powerpc/kvm/bookehv_interrupts.S
+++ b/arch/powerpc/kvm/bookehv_interrupts.S
@@ -40,6 +40,14 @@
#define VCPU_GPR(n) (VCPU_GPRS + (n * LONGBYTES))
#define VCPU_GUEST_SPRG(n) (VCPU_GUEST_SPRGS + (n * LONGBYTES))
+#ifdef CONFIG_64BIT
+#define PPC_STD(sreg, offset, areg) std sreg, offset(areg)
+#define PPC_LD(treg, offset, areg) ld treg, offset(areg)
+#else
+#define PPC_STD(sreg, offset, areg) stw sreg, offset+4(areg)
+#define PPC_LD(treg, offset, areg) lwz treg, offset+4(areg)
Please use parentheses around "offset".
-Scott
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