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>

diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c
index 8297004..18cf6d1 100644 (file)
--- 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 f88b859..d461c44 100644 (file)
--- 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 62ea3c6..e571ad2 100644 (file)
--- 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 */