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https://github.com/edk2-porting/linux-next.git
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KVM: ppc: Move 440-specific TLB code into 44x_tlb.c
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>
This commit is contained in:
Hollis Blanchard
Avi Kivity
parent
2843099fee
commit
a0d7b9f246
@ -58,11 +58,11 @@ extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
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extern int kvmppc_emulate_instruction(struct kvm_run *run,
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struct kvm_vcpu *vcpu);
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extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
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extern int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
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extern int kvmppc_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb, u8 rc);
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extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
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u64 asid, u32 flags);
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extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
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gva_t eend, u32 asid);
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extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
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extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
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@ -32,6 +32,34 @@
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static unsigned int kvmppc_tlb_44x_pos;
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#ifdef DEBUG
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void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_44x_tlbe *tlbe;
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int i;
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printk("vcpu %d TLB dump:\n", vcpu->vcpu_id);
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printk("| %2s | %3s | %8s | %8s | %8s |\n",
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"nr", "tid", "word0", "word1", "word2");
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for (i = 0; i < PPC44x_TLB_SIZE; i++) {
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tlbe = &vcpu->arch.guest_tlb[i];
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if (tlbe->word0 & PPC44x_TLB_VALID)
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printk(" G%2d | %02X | %08X | %08X | %08X |\n",
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i, tlbe->tid, tlbe->word0, tlbe->word1,
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tlbe->word2);
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}
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for (i = 0; i < PPC44x_TLB_SIZE; i++) {
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tlbe = &vcpu->arch.shadow_tlb[i];
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if (tlbe->word0 & PPC44x_TLB_VALID)
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printk(" S%2d | %02X | %08X | %08X | %08X |\n",
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i, tlbe->tid, tlbe->word0, tlbe->word1,
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tlbe->word2);
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}
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}
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#endif
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static u32 kvmppc_44x_tlb_shadow_attrib(u32 attrib, int usermode)
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{
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/* Mask off reserved bits. */
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@ -191,8 +219,8 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn, u64 asid,
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handler);
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}
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void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
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gva_t eend, u32 asid)
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static void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
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gva_t eend, u32 asid)
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{
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unsigned int pid = !(asid & 0xff);
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int i;
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@ -249,3 +277,109 @@ void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode)
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vcpu->arch.shadow_pid = !usermode;
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}
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static int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
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const struct tlbe *tlbe)
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{
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gpa_t gpa;
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if (!get_tlb_v(tlbe))
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return 0;
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/* Does it match current guest AS? */
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/* XXX what about IS != DS? */
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if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
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return 0;
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gpa = get_tlb_raddr(tlbe);
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if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
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/* Mapping is not for RAM. */
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return 0;
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return 1;
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}
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int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws)
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{
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u64 eaddr;
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u64 raddr;
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u64 asid;
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u32 flags;
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struct tlbe *tlbe;
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unsigned int index;
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index = vcpu->arch.gpr[ra];
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if (index > PPC44x_TLB_SIZE) {
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printk("%s: index %d\n", __func__, index);
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kvmppc_dump_vcpu(vcpu);
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return EMULATE_FAIL;
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}
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tlbe = &vcpu->arch.guest_tlb[index];
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/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
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if (tlbe->word0 & PPC44x_TLB_VALID) {
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eaddr = get_tlb_eaddr(tlbe);
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asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
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kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
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}
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switch (ws) {
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case PPC44x_TLB_PAGEID:
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tlbe->tid = vcpu->arch.mmucr & 0xff;
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tlbe->word0 = vcpu->arch.gpr[rs];
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break;
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case PPC44x_TLB_XLAT:
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tlbe->word1 = vcpu->arch.gpr[rs];
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break;
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case PPC44x_TLB_ATTRIB:
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tlbe->word2 = vcpu->arch.gpr[rs];
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break;
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default:
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return EMULATE_FAIL;
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}
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if (tlbe_is_host_safe(vcpu, tlbe)) {
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eaddr = get_tlb_eaddr(tlbe);
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raddr = get_tlb_raddr(tlbe);
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asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
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flags = tlbe->word2 & 0xffff;
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/* Create a 4KB mapping on the host. If the guest wanted a
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* large page, only the first 4KB is mapped here and the rest
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* are mapped on the fly. */
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kvmppc_mmu_map(vcpu, eaddr, raddr >> PAGE_SHIFT, asid, flags);
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}
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KVMTRACE_5D(GTLB_WRITE, vcpu, index,
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tlbe->tid, tlbe->word0, tlbe->word1, tlbe->word2,
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handler);
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return EMULATE_DONE;
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}
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int kvmppc_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb, u8 rc)
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{
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u32 ea;
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int index;
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unsigned int as = get_mmucr_sts(vcpu);
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unsigned int pid = get_mmucr_stid(vcpu);
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ea = vcpu->arch.gpr[rb];
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if (ra)
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ea += vcpu->arch.gpr[ra];
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index = kvmppc_44x_tlb_index(vcpu, ea, pid, as);
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if (rc) {
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if (index < 0)
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vcpu->arch.cr &= ~0x20000000;
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else
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vcpu->arch.cr |= 0x20000000;
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}
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vcpu->arch.gpr[rt] = index;
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return EMULATE_DONE;
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}
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@ -111,32 +111,6 @@ const unsigned char priority_exception[] = {
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};
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void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
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{
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struct tlbe *tlbe;
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int i;
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printk("vcpu %d TLB dump:\n", vcpu->vcpu_id);
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printk("| %2s | %3s | %8s | %8s | %8s |\n",
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"nr", "tid", "word0", "word1", "word2");
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for (i = 0; i < PPC44x_TLB_SIZE; i++) {
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tlbe = &vcpu->arch.guest_tlb[i];
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if (tlbe->word0 & PPC44x_TLB_VALID)
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printk(" G%2d | %02X | %08X | %08X | %08X |\n",
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i, tlbe->tid, tlbe->word0, tlbe->word1,
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tlbe->word2);
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}
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for (i = 0; i < PPC44x_TLB_SIZE; i++) {
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tlbe = &vcpu->arch.shadow_tlb[i];
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if (tlbe->word0 & PPC44x_TLB_VALID)
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printk(" S%2d | %02X | %08X | %08X | %08X |\n",
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i, tlbe->tid, tlbe->word0, tlbe->word1,
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tlbe->word2);
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}
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}
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/* TODO: use vcpu_printf() */
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void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
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{
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@ -29,8 +29,6 @@
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#include <asm/byteorder.h>
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#include <asm/kvm_ppc.h>
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#include "44x_tlb.h"
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/* Instruction decoding */
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static inline unsigned int get_op(u32 inst)
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{
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@ -87,96 +85,6 @@ static inline unsigned int get_d(u32 inst)
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return inst & 0xffff;
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}
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static int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
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const struct tlbe *tlbe)
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{
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gpa_t gpa;
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if (!get_tlb_v(tlbe))
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return 0;
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/* Does it match current guest AS? */
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/* XXX what about IS != DS? */
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if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
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return 0;
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gpa = get_tlb_raddr(tlbe);
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if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
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/* Mapping is not for RAM. */
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return 0;
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return 1;
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}
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static int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u32 inst)
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{
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u64 eaddr;
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u64 raddr;
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u64 asid;
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u32 flags;
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struct tlbe *tlbe;
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unsigned int ra;
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unsigned int rs;
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unsigned int ws;
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unsigned int index;
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ra = get_ra(inst);
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rs = get_rs(inst);
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ws = get_ws(inst);
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index = vcpu->arch.gpr[ra];
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if (index > PPC44x_TLB_SIZE) {
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printk("%s: index %d\n", __func__, index);
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kvmppc_dump_vcpu(vcpu);
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return EMULATE_FAIL;
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}
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tlbe = &vcpu->arch.guest_tlb[index];
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/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
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if (tlbe->word0 & PPC44x_TLB_VALID) {
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eaddr = get_tlb_eaddr(tlbe);
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asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
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kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
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}
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switch (ws) {
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case PPC44x_TLB_PAGEID:
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tlbe->tid = vcpu->arch.mmucr & 0xff;
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tlbe->word0 = vcpu->arch.gpr[rs];
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break;
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case PPC44x_TLB_XLAT:
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tlbe->word1 = vcpu->arch.gpr[rs];
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break;
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case PPC44x_TLB_ATTRIB:
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tlbe->word2 = vcpu->arch.gpr[rs];
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break;
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default:
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return EMULATE_FAIL;
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}
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if (tlbe_is_host_safe(vcpu, tlbe)) {
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eaddr = get_tlb_eaddr(tlbe);
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raddr = get_tlb_raddr(tlbe);
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asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
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flags = tlbe->word2 & 0xffff;
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/* Create a 4KB mapping on the host. If the guest wanted a
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* large page, only the first 4KB is mapped here and the rest
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* are mapped on the fly. */
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kvmppc_mmu_map(vcpu, eaddr, raddr >> PAGE_SHIFT, asid, flags);
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}
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KVMTRACE_5D(GTLB_WRITE, vcpu, index,
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tlbe->tid, tlbe->word0, tlbe->word1, tlbe->word2,
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handler);
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return EMULATE_DONE;
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}
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static void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
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{
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if (vcpu->arch.tcr & TCR_DIE) {
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@ -222,6 +130,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
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int rc;
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int rs;
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int rt;
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int ws;
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int sprn;
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int dcrn;
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enum emulation_result emulated = EMULATE_DONE;
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@ -630,33 +539,18 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
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break;
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case 978: /* tlbwe */
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emulated = kvmppc_emul_tlbwe(vcpu, inst);
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ra = get_ra(inst);
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rs = get_rs(inst);
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ws = get_ws(inst);
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emulated = kvmppc_emul_tlbwe(vcpu, ra, rs, ws);
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break;
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case 914: { /* tlbsx */
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int index;
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unsigned int as = get_mmucr_sts(vcpu);
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unsigned int pid = get_mmucr_stid(vcpu);
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case 914: /* tlbsx */
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rt = get_rt(inst);
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ra = get_ra(inst);
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rb = get_rb(inst);
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rc = get_rc(inst);
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ea = vcpu->arch.gpr[rb];
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if (ra)
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ea += vcpu->arch.gpr[ra];
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index = kvmppc_44x_tlb_index(vcpu, ea, pid, as);
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if (rc) {
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if (index < 0)
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vcpu->arch.cr &= ~0x20000000;
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else
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vcpu->arch.cr |= 0x20000000;
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}
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vcpu->arch.gpr[rt] = index;
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}
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emulated = kvmppc_emul_tlbsx(vcpu, rt, ra, rb, rc);
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break;
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case 790: /* lhbrx */
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