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authorAlexey Kardashevskiy <aik@ozlabs.ru>2016-03-18 05:50:42 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2016-03-22 14:02:51 +0300
commit31217db720186edc7ae3c4354e5fa5848bb28358 (patch)
treeb18b49ccbf98cc9d2c50cc7cb53903decc7bb5ae /arch/powerpc/kvm
parentef697a712a6165aea7779c295604b099e8bfae2e (diff)
downloadlinux-31217db720186edc7ae3c4354e5fa5848bb28358.tar.xz
KVM: PPC: Create a virtual-mode only TCE table handlers
Upcoming in-kernel VFIO acceleration needs different handling in real and virtual modes which makes it hard to support both modes in the same handler. This creates a copy of kvmppc_rm_h_stuff_tce and kvmppc_rm_h_put_tce in addition to the existing kvmppc_rm_h_put_tce_indirect. This also fixes linker breakage when only PR KVM was selected (leaving HV KVM off): the kvmppc_h_put_tce/kvmppc_h_stuff_tce functions would not compile at all and the linked would fail. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/book3s_64_vio.c52
-rw-r--r--arch/powerpc/kvm/book3s_64_vio_hv.c8
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S4
3 files changed, 57 insertions, 7 deletions
diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c
index 82970042295e..18cf6d1f8174 100644
--- a/arch/powerpc/kvm/book3s_64_vio.c
+++ b/arch/powerpc/kvm/book3s_64_vio.c
@@ -209,6 +209,32 @@ fail:
return ret;
}
+long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
+ unsigned long ioba, unsigned long tce)
+{
+ struct kvmppc_spapr_tce_table *stt = kvmppc_find_table(vcpu, liobn);
+ long ret;
+
+ /* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */
+ /* liobn, ioba, tce); */
+
+ if (!stt)
+ return H_TOO_HARD;
+
+ ret = kvmppc_ioba_validate(stt, ioba, 1);
+ if (ret != H_SUCCESS)
+ return ret;
+
+ ret = kvmppc_tce_validate(stt, tce);
+ if (ret != H_SUCCESS)
+ return ret;
+
+ kvmppc_tce_put(stt, ioba >> stt->page_shift, tce);
+
+ return H_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(kvmppc_h_put_tce);
+
long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
unsigned long liobn, unsigned long ioba,
unsigned long tce_list, unsigned long npages)
@@ -264,3 +290,29 @@ unlock_exit:
return ret;
}
EXPORT_SYMBOL_GPL(kvmppc_h_put_tce_indirect);
+
+long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
+ unsigned long liobn, unsigned long ioba,
+ unsigned long tce_value, unsigned long npages)
+{
+ struct kvmppc_spapr_tce_table *stt;
+ long i, ret;
+
+ stt = kvmppc_find_table(vcpu, liobn);
+ if (!stt)
+ return H_TOO_HARD;
+
+ ret = kvmppc_ioba_validate(stt, ioba, npages);
+ if (ret != H_SUCCESS)
+ return ret;
+
+ /* Check permission bits only to allow userspace poison TCE for debug */
+ if (tce_value & (TCE_PCI_WRITE | TCE_PCI_READ))
+ return H_PARAMETER;
+
+ for (i = 0; i < npages; ++i, ioba += (1ULL << stt->page_shift))
+ kvmppc_tce_put(stt, ioba >> stt->page_shift, tce_value);
+
+ return H_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(kvmppc_h_stuff_tce);
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c
index f88b859af53b..d461c440889a 100644
--- a/arch/powerpc/kvm/book3s_64_vio_hv.c
+++ b/arch/powerpc/kvm/book3s_64_vio_hv.c
@@ -180,8 +180,8 @@ long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa,
EXPORT_SYMBOL_GPL(kvmppc_gpa_to_ua);
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
-long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
- unsigned long ioba, unsigned long tce)
+long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
+ unsigned long ioba, unsigned long tce)
{
struct kvmppc_spapr_tce_table *stt = kvmppc_find_table(vcpu, liobn);
long ret;
@@ -204,7 +204,6 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
return H_SUCCESS;
}
-EXPORT_SYMBOL_GPL(kvmppc_h_put_tce);
static long kvmppc_rm_ua_to_hpa(struct kvm_vcpu *vcpu,
unsigned long ua, unsigned long *phpa)
@@ -296,7 +295,7 @@ unlock_exit:
return ret;
}
-long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
+long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
unsigned long liobn, unsigned long ioba,
unsigned long tce_value, unsigned long npages)
{
@@ -320,7 +319,6 @@ long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
return H_SUCCESS;
}
-EXPORT_SYMBOL_GPL(kvmppc_h_stuff_tce);
long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 62ea3c6acdee..e571ad277398 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1942,7 +1942,7 @@ hcall_real_table:
.long DOTSYM(kvmppc_h_clear_ref) - hcall_real_table
.long DOTSYM(kvmppc_h_protect) - hcall_real_table
.long DOTSYM(kvmppc_h_get_tce) - hcall_real_table
- .long DOTSYM(kvmppc_h_put_tce) - hcall_real_table
+ .long DOTSYM(kvmppc_rm_h_put_tce) - hcall_real_table
.long 0 /* 0x24 - H_SET_SPRG0 */
.long DOTSYM(kvmppc_h_set_dabr) - hcall_real_table
.long 0 /* 0x2c */
@@ -2020,7 +2020,7 @@ hcall_real_table:
.long 0 /* 0x12c */
.long 0 /* 0x130 */
.long DOTSYM(kvmppc_h_set_xdabr) - hcall_real_table
- .long DOTSYM(kvmppc_h_stuff_tce) - hcall_real_table
+ .long DOTSYM(kvmppc_rm_h_stuff_tce) - hcall_real_table
.long DOTSYM(kvmppc_rm_h_put_tce_indirect) - hcall_real_table
.long 0 /* 0x140 */
.long 0 /* 0x144 */