Add support for the H_SET_MODE hcall so we can select the
endianness of our exceptions.
We create a guest MSR from scratch when delivering exceptions in
a few places and instead of extracing the LPCR[ILE] and inserting
it into MSR_LE each time simply create a new variable intr_msr which
contains the entire MSR to use.
Signed-off-by: Anton Blanchard an...@samba.org
Cc: Alexander Graf ag...@suse.de
---
arch/powerpc/include/asm/kvm_host.h | 1 +
arch/powerpc/kernel/asm-offsets.c | 1 +
arch/powerpc/kvm/book3s_64_mmu_hv.c | 2 +-
arch/powerpc/kvm/book3s_hv.c| 44 +
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 15 ---
5 files changed, 52 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/include/asm/kvm_host.h
b/arch/powerpc/include/asm/kvm_host.h
index 3328353..50f204e 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -605,6 +605,7 @@ 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 d8958be..3967b15 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -490,6 +490,7 @@ 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 --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 043eec8..30459bd 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -266,7 +266,7 @@ void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu)
{
- kvmppc_set_msr(vcpu, MSR_SF | MSR_ME);
+ kvmppc_set_msr(vcpu, vcpu-arch.intr_msr);
}
/*
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 62a2b5a..c9b90b8 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -503,6 +503,43 @@ static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu,
vcpu-arch.dtl.dirty = true;
}
+static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
+unsigned long resource, unsigned long value1,
+unsigned long value2)
+{
+ struct kvm *kvm = vcpu-kvm;
+ struct kvm_vcpu *v;
+ int n;
+
+ if (resource == 4) {
+ if (value1)
+ return H_P3;
+ if (value2)
+ return H_P4;
+
+ switch (mflags) {
+ case 0:
+ kvm-arch.lpcr = ~LPCR_ILE;
+ kvm_for_each_vcpu(n, v, kvm)
+ v-arch.intr_msr = ~MSR_LE;
+ kick_all_cpus_sync();
+ return H_SUCCESS;
+
+ case 1:
+ kvm-arch.lpcr |= LPCR_ILE;
+ kvm_for_each_vcpu(n, v, kvm)
+ v-arch.intr_msr |= MSR_LE;
+ kick_all_cpus_sync();
+ return H_SUCCESS;
+
+ default:
+ return H_UNSUPPORTED_FLAG_START;
+ }
+ }
+
+ return H_P2;
+}
+
int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
{
unsigned long req = kvmppc_get_gpr(vcpu, 3);
@@ -557,6 +594,12 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
/* Send the error out to userspace via KVM_RUN */
return rc;
+ case H_SET_MODE:
+ ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5),
+ kvmppc_get_gpr(vcpu, 6),
+ kvmppc_get_gpr(vcpu, 7));
+ break;
case H_XIRR:
case H_CPPR:
@@ -924,6 +967,7 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm,
unsigned int id)
spin_lock_init(vcpu-arch.vpa_update_lock);
spin_lock_init(vcpu-arch.tbacct_lock);
vcpu-arch.busy_preempt = TB_NIL;
+ vcpu-arch.intr_msr = MSR_SF | MSR_ME;
kvmppc_mmu_book3s_hv_init(vcpu);
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 294b7af..7b7bcea 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -521,8 +521,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
12:mr r6,r10
mr r10,r0
mr r7,r11
- li r11,(MSR_ME 1) | 1
