KVM: PPC: Book3S HV: Basic little-endian guest support

We create a guest MSR from scratch when delivering exceptions in
a few places.  Instead of extracting LPCR[ILE] and inserting it
into MSR_LE each time, we simply create a new variable intr_msr which
contains the entire MSR to use.  For a little-endian guest, userspace
needs to set the ILE (interrupt little-endian) bit in the LPCR for
each vcpu (or at least one vcpu in each virtual core).

[paulus@samba.org - removed H_SET_MODE implementation from original
version of the patch, and made kvmppc_set_lpcr update vcpu->arch.intr_msr.]

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index d161bc0..7726a3b 100644 (file)
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -636,6 +636,7 @@ struct kvm_vcpu_arch {
        spinlock_t tbacct_lock;
        u64 busy_stolen;
        u64 busy_preempt;
+       unsigned long intr_msr;
 #endif
 };
 

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 239a857..a60a2fd 100644 (file)
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -480,6 +480,7 @@ int main(void)
        DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.shregs.dar));
        DEFINE(VCPU_VPA, offsetof(struct kvm_vcpu, arch.vpa.pinned_addr));
        DEFINE(VCPU_VPA_DIRTY, offsetof(struct kvm_vcpu, arch.vpa.dirty));
+       DEFINE(VCPU_INTR_MSR, offsetof(struct kvm_vcpu, arch.intr_msr));
 #endif
 #ifdef CONFIG_PPC_BOOK3S
        DEFINE(VCPU_VCPUID, offsetof(struct kvm_vcpu, vcpu_id));

diff --cc arch/powerpc/kvm/book3s_64_mmu_hv.c
Simple merge

diff --cc arch/powerpc/kvm/book3s_hv.c
Simple merge

diff --cc arch/powerpc/kvm/book3s_hv_rmhandlers.S
Simple merge