KVM: ppc: Move 440-specific TLB code into 44x_tlb.c
Hollis Blanchard [Wed, 5 Nov 2008 15:36:11 +0000 (09:36 -0600)]
This will make it easier to provide implementations for other cores.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/powerpc/include/asm/kvm_ppc.h
arch/powerpc/kvm/44x_tlb.c
arch/powerpc/kvm/booke_guest.c
arch/powerpc/kvm/emulate.c

index bb62ad8..4adb4a3 100644 (file)
@@ -58,11 +58,11 @@ extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 extern int kvmppc_emulate_instruction(struct kvm_run *run,
                                       struct kvm_vcpu *vcpu);
 extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
+extern int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
+extern int kvmppc_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb, u8 rc);
 
 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
                            u64 asid, u32 flags);
-extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
-                                  gva_t eend, u32 asid);
 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
 
index ad72c6f..dd75ab8 100644 (file)
 
 static unsigned int kvmppc_tlb_44x_pos;
 
+#ifdef DEBUG
+void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
+{
+       struct kvmppc_44x_tlbe *tlbe;
+       int i;
+
+       printk("vcpu %d TLB dump:\n", vcpu->vcpu_id);
+       printk("| %2s | %3s | %8s | %8s | %8s |\n",
+                       "nr", "tid", "word0", "word1", "word2");
+
+       for (i = 0; i < PPC44x_TLB_SIZE; i++) {
+               tlbe = &vcpu->arch.guest_tlb[i];
+               if (tlbe->word0 & PPC44x_TLB_VALID)
+                       printk(" G%2d |  %02X | %08X | %08X | %08X |\n",
+                              i, tlbe->tid, tlbe->word0, tlbe->word1,
+                              tlbe->word2);
+       }
+
+       for (i = 0; i < PPC44x_TLB_SIZE; i++) {
+               tlbe = &vcpu->arch.shadow_tlb[i];
+               if (tlbe->word0 & PPC44x_TLB_VALID)
+                       printk(" S%2d | %02X | %08X | %08X | %08X |\n",
+                              i, tlbe->tid, tlbe->word0, tlbe->word1,
+                              tlbe->word2);
+       }
+}
+#endif
+
 static u32 kvmppc_44x_tlb_shadow_attrib(u32 attrib, int usermode)
 {
        /* Mask off reserved bits. */
@@ -191,8 +219,8 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn, u64 asid,
                        handler);
 }
 
-void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
-                           gva_t eend, u32 asid)
+static void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
+                                  gva_t eend, u32 asid)
 {
        unsigned int pid = !(asid & 0xff);
        int i;
@@ -249,3 +277,109 @@ void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode)
 
        vcpu->arch.shadow_pid = !usermode;
 }
+
+static int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
+                             const struct tlbe *tlbe)
+{
+       gpa_t gpa;
+
+       if (!get_tlb_v(tlbe))
+               return 0;
+
+       /* Does it match current guest AS? */
+       /* XXX what about IS != DS? */
+       if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
+               return 0;
+
+       gpa = get_tlb_raddr(tlbe);
+       if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
+               /* Mapping is not for RAM. */
+               return 0;
+
+       return 1;
+}
+
+int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws)
+{
+       u64 eaddr;
+       u64 raddr;
+       u64 asid;
+       u32 flags;
+       struct tlbe *tlbe;
+       unsigned int index;
+
+       index = vcpu->arch.gpr[ra];
+       if (index > PPC44x_TLB_SIZE) {
+               printk("%s: index %d\n", __func__, index);
+               kvmppc_dump_vcpu(vcpu);
+               return EMULATE_FAIL;
+       }
+
+       tlbe = &vcpu->arch.guest_tlb[index];
+
+       /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
+       if (tlbe->word0 & PPC44x_TLB_VALID) {
+               eaddr = get_tlb_eaddr(tlbe);
+               asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
+               kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
+       }
+
+       switch (ws) {
+       case PPC44x_TLB_PAGEID:
+               tlbe->tid = vcpu->arch.mmucr & 0xff;
+               tlbe->word0 = vcpu->arch.gpr[rs];
+               break;
+
+       case PPC44x_TLB_XLAT:
+               tlbe->word1 = vcpu->arch.gpr[rs];
+               break;
+
+       case PPC44x_TLB_ATTRIB:
+               tlbe->word2 = vcpu->arch.gpr[rs];
+               break;
+
+       default:
+               return EMULATE_FAIL;
+       }
+
+       if (tlbe_is_host_safe(vcpu, tlbe)) {
+               eaddr = get_tlb_eaddr(tlbe);
+               raddr = get_tlb_raddr(tlbe);
+               asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
+               flags = tlbe->word2 & 0xffff;
+
+               /* Create a 4KB mapping on the host. If the guest wanted a
+                * large page, only the first 4KB is mapped here and the rest
+                * are mapped on the fly. */
+               kvmppc_mmu_map(vcpu, eaddr, raddr >> PAGE_SHIFT, asid, flags);
+       }
+
+       KVMTRACE_5D(GTLB_WRITE, vcpu, index,
+                   tlbe->tid, tlbe->word0, tlbe->word1, tlbe->word2,
+                   handler);
+
+       return EMULATE_DONE;
+}
+
+int kvmppc_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb, u8 rc)
+{
+       u32 ea;
+       int index;
+       unsigned int as = get_mmucr_sts(vcpu);
+       unsigned int pid = get_mmucr_stid(vcpu);
+
+       ea = vcpu->arch.gpr[rb];
+       if (ra)
+               ea += vcpu->arch.gpr[ra];
+
+       index = kvmppc_44x_tlb_index(vcpu, ea, pid, as);
+       if (rc) {
+               if (index < 0)
+                       vcpu->arch.cr &= ~0x20000000;
+               else
+                       vcpu->arch.cr |= 0x20000000;
+       }
+       vcpu->arch.gpr[rt] = index;
+
+       return EMULATE_DONE;
+}
index 7b2591e..c0f8532 100644 (file)
@@ -111,32 +111,6 @@ const unsigned char priority_exception[] = {
 };
 
 
-void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
-{
-       struct tlbe *tlbe;
-       int i;
-
-       printk("vcpu %d TLB dump:\n", vcpu->vcpu_id);
-       printk("| %2s | %3s | %8s | %8s | %8s |\n",
-                       "nr", "tid", "word0", "word1", "word2");
-
-       for (i = 0; i < PPC44x_TLB_SIZE; i++) {
-               tlbe = &vcpu->arch.guest_tlb[i];
-               if (tlbe->word0 & PPC44x_TLB_VALID)
-                       printk(" G%2d |  %02X | %08X | %08X | %08X |\n",
-                              i, tlbe->tid, tlbe->word0, tlbe->word1,
-                              tlbe->word2);
-       }
-
-       for (i = 0; i < PPC44x_TLB_SIZE; i++) {
-               tlbe = &vcpu->arch.shadow_tlb[i];
-               if (tlbe->word0 & PPC44x_TLB_VALID)
-                       printk(" S%2d | %02X | %08X | %08X | %08X |\n",
-                              i, tlbe->tid, tlbe->word0, tlbe->word1,
-                              tlbe->word2);
-       }
-}
-
 /* TODO: use vcpu_printf() */
 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
 {
index 0fce4fb..0ce8ed5 100644 (file)
@@ -29,8 +29,6 @@
 #include <asm/byteorder.h>
 #include <asm/kvm_ppc.h>
 
-#include "44x_tlb.h"
-
 /* Instruction decoding */
 static inline unsigned int get_op(u32 inst)
 {
@@ -87,96 +85,6 @@ static inline unsigned int get_d(u32 inst)
        return inst & 0xffff;
 }
 
-static int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
-                             const struct tlbe *tlbe)
-{
-       gpa_t gpa;
-
-       if (!get_tlb_v(tlbe))
-               return 0;
-
-       /* Does it match current guest AS? */
-       /* XXX what about IS != DS? */
-       if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
-               return 0;
-
-       gpa = get_tlb_raddr(tlbe);
-       if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
-               /* Mapping is not for RAM. */
-               return 0;
-
-       return 1;
-}
-
-static int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u32 inst)
-{
-       u64 eaddr;
-       u64 raddr;
-       u64 asid;
-       u32 flags;
-       struct tlbe *tlbe;
-       unsigned int ra;
-       unsigned int rs;
-       unsigned int ws;
-       unsigned int index;
-
-       ra = get_ra(inst);
-       rs = get_rs(inst);
-       ws = get_ws(inst);
-
-       index = vcpu->arch.gpr[ra];
-       if (index > PPC44x_TLB_SIZE) {
-               printk("%s: index %d\n", __func__, index);
-               kvmppc_dump_vcpu(vcpu);
-               return EMULATE_FAIL;
-       }
-
-       tlbe = &vcpu->arch.guest_tlb[index];
-
-       /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
-       if (tlbe->word0 & PPC44x_TLB_VALID) {
-               eaddr = get_tlb_eaddr(tlbe);
-               asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
-               kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
-       }
-
-       switch (ws) {
-       case PPC44x_TLB_PAGEID:
-               tlbe->tid = vcpu->arch.mmucr & 0xff;
-               tlbe->word0 = vcpu->arch.gpr[rs];
-               break;
-
-       case PPC44x_TLB_XLAT:
-               tlbe->word1 = vcpu->arch.gpr[rs];
-               break;
-
-       case PPC44x_TLB_ATTRIB:
-               tlbe->word2 = vcpu->arch.gpr[rs];
-               break;
-
-       default:
-               return EMULATE_FAIL;
-       }
-
-       if (tlbe_is_host_safe(vcpu, tlbe)) {
-               eaddr = get_tlb_eaddr(tlbe);
-               raddr = get_tlb_raddr(tlbe);
-               asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
-               flags = tlbe->word2 & 0xffff;
-
-               /* Create a 4KB mapping on the host. If the guest wanted a
-                * large page, only the first 4KB is mapped here and the rest
-                * are mapped on the fly. */
-               kvmppc_mmu_map(vcpu, eaddr, raddr >> PAGE_SHIFT, asid, flags);
-       }
-
-       KVMTRACE_5D(GTLB_WRITE, vcpu, index,
-                       tlbe->tid, tlbe->word0, tlbe->word1, tlbe->word2,
-                       handler);
-
-       return EMULATE_DONE;
-}
-
 static void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
 {
        if (vcpu->arch.tcr & TCR_DIE) {
@@ -222,6 +130,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
        int rc;
        int rs;
        int rt;
+       int ws;
        int sprn;
        int dcrn;
        enum emulation_result emulated = EMULATE_DONE;
@@ -630,33 +539,18 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
                        break;
 
                case 978:                                       /* tlbwe */
-                       emulated = kvmppc_emul_tlbwe(vcpu, inst);
+                       ra = get_ra(inst);
+                       rs = get_rs(inst);
+                       ws = get_ws(inst);
+                       emulated = kvmppc_emul_tlbwe(vcpu, ra, rs, ws);
                        break;
 
-               case 914:       {                               /* tlbsx */
-                       int index;
-                       unsigned int as = get_mmucr_sts(vcpu);
-                       unsigned int pid = get_mmucr_stid(vcpu);
-
+               case 914:                                       /* tlbsx */
                        rt = get_rt(inst);
                        ra = get_ra(inst);
                        rb = get_rb(inst);
                        rc = get_rc(inst);
-
-                       ea = vcpu->arch.gpr[rb];
-                       if (ra)
-                               ea += vcpu->arch.gpr[ra];
-
-                       index = kvmppc_44x_tlb_index(vcpu, ea, pid, as);
-                       if (rc) {
-                               if (index < 0)
-                                       vcpu->arch.cr &= ~0x20000000;
-                               else
-                                       vcpu->arch.cr |= 0x20000000;
-                       }
-                       vcpu->arch.gpr[rt] = index;
-
-                       }
+                       emulated = kvmppc_emul_tlbsx(vcpu, rt, ra, rb, rc);
                        break;
 
                case 790:                                       /* lhbrx */