From 7092360399644ad4b12ac573c1996536b9e9b4b6 Mon Sep 17 00:00:00 2001 From: Simon Guo Date: Mon, 21 May 2018 13:24:21 +0800 Subject: KVM: PPC: Reimplement non-SIMD LOAD/STORE instruction mmio emulation with analyse_instr() input This patch reimplements non-SIMD LOAD/STORE instruction MMIO emulation with analyse_instr() input. It utilizes the BYTEREV/UPDATE/SIGNEXT properties exported by analyse_instr() and invokes kvmppc_handle_load(s)/kvmppc_handle_store() accordingly. It also moves CACHEOP type handling into the skeleton. instruction_type within kvm_ppc.h is renamed to avoid conflict with sstep.h. Suggested-by: Paul Mackerras Signed-off-by: Simon Guo Signed-off-by: Paul Mackerras --- arch/powerpc/kvm/emulate_loadstore.c | 271 ++++++----------------------------- 1 file changed, 42 insertions(+), 229 deletions(-) (limited to 'arch/powerpc/kvm/emulate_loadstore.c') diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c index b8a3aefc3033..af7c71a0ae6f 100644 --- a/arch/powerpc/kvm/emulate_loadstore.c +++ b/arch/powerpc/kvm/emulate_loadstore.c @@ -31,6 +31,7 @@ #include #include #include +#include #include "timing.h" #include "trace.h" @@ -84,8 +85,9 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) struct kvm_run *run = vcpu->run; u32 inst; int ra, rs, rt; - enum emulation_result emulated; + enum emulation_result emulated = EMULATE_FAIL; int advance = 1; + struct instruction_op op; /* this default type might be overwritten by subcategories */ kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS); @@ -113,144 +115,61 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) vcpu->arch.mmio_vmx_copy_nums = 0; vcpu->arch.mmio_host_swabbed = 0; - switch (get_op(inst)) { - case 31: - switch (get_xop(inst)) { - case OP_31_XOP_LWZX: - emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1); - break; - - case OP_31_XOP_LWZUX: - emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_LBZX: - emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1); - break; - - case OP_31_XOP_LBZUX: - emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_STDX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 8, 1); - break; - - case OP_31_XOP_STDUX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; + emulated = EMULATE_FAIL; + vcpu->arch.regs.msr = vcpu->arch.shared->msr; + vcpu->arch.regs.ccr = vcpu->arch.cr; + if (analyse_instr(&op, &vcpu->arch.regs, inst) == 0) { + int type = op.type & INSTR_TYPE_MASK; + int size = GETSIZE(op.type); - case OP_31_XOP_STWX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 4, 1); - break; + switch (type) { + case LOAD: { + int instr_byte_swap = op.type & BYTEREV; - case OP_31_XOP_STWUX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; + if (op.type & SIGNEXT) + emulated = kvmppc_handle_loads(run, vcpu, + op.reg, size, !instr_byte_swap); + else + emulated = kvmppc_handle_load(run, vcpu, + op.reg, size, !instr_byte_swap); - case OP_31_XOP_STBX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 1, 1); - break; + if ((op.type & UPDATE) && (emulated != EMULATE_FAIL)) + kvmppc_set_gpr(vcpu, op.update_reg, op.ea); - case OP_31_XOP_STBUX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 1, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_LHAX: - emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1); - break; - - case OP_31_XOP_LHAUX: - emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_LHZX: - emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1); break; + } + case STORE: + /* if need byte reverse, op.val has been reversed by + * analyse_instr(). + */ + emulated = kvmppc_handle_store(run, vcpu, op.val, + size, 1); - case OP_31_XOP_LHZUX: - emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; + if ((op.type & UPDATE) && (emulated != EMULATE_FAIL)) + kvmppc_set_gpr(vcpu, op.update_reg, op.ea); - case OP_31_XOP_STHX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 2, 1); - break; - - case OP_31_XOP_STHUX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 2, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); break; - - case OP_31_XOP_DCBST: - case OP_31_XOP_DCBF: - case OP_31_XOP_DCBI: + case CACHEOP: /* Do nothing. The guest is performing dcbi because * hardware DMA is not snooped by the dcache, but * emulated DMA either goes through the dcache as * normal writes, or the host kernel has handled dcache - * coherence. */ - break; - - case OP_31_XOP_LWBRX: - emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0); - break; - - case OP_31_XOP_STWBRX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 4, 0); - break; - - case OP_31_XOP_LHBRX: - emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0); + * coherence. + */ + emulated = EMULATE_DONE; break; - - case OP_31_XOP_STHBRX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 2, 0); - break; - - case OP_31_XOP_LDBRX: - emulated = kvmppc_handle_load(run, vcpu, rt, 8, 0); - break; - - case OP_31_XOP_STDBRX: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 8, 0); - break; - - case OP_31_XOP_LDX: - emulated = kvmppc_handle_load(run, vcpu, rt, 8, 1); - break; - - case OP_31_XOP_LDUX: - emulated = kvmppc_handle_load(run, vcpu, rt, 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); + default: break; + } + } - case OP_31_XOP_LWAX: - emulated = kvmppc_handle_loads(run, vcpu, rt, 4, 1); - break; - case OP_31_XOP_LWAUX: - emulated = kvmppc_handle_loads(run, vcpu, rt, 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; + if ((emulated == EMULATE_DONE) || (emulated == EMULATE_DO_MMIO)) + goto out; + switch (get_op(inst)) { + case 31: + switch (get_xop(inst)) { #ifdef CONFIG_PPC_FPU case OP_31_XOP_LFSX: if (kvmppc_check_fp_disabled(vcpu)) @@ -502,10 +421,6 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) } break; - case OP_LWZ: - emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1); - break; - #ifdef CONFIG_PPC_FPU case OP_STFS: if (kvmppc_check_fp_disabled(vcpu)) @@ -542,110 +457,7 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) 8, 1); kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); break; -#endif - - case OP_LD: - rt = get_rt(inst); - switch (inst & 3) { - case 0: /* ld */ - emulated = kvmppc_handle_load(run, vcpu, rt, 8, 1); - break; - case 1: /* ldu */ - emulated = kvmppc_handle_load(run, vcpu, rt, 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - case 2: /* lwa */ - emulated = kvmppc_handle_loads(run, vcpu, rt, 4, 1); - break; - default: - emulated = EMULATE_FAIL; - } - break; - - case OP_LWZU: - emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_LBZ: - emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1); - break; - case OP_LBZU: - emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_STW: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), - 4, 1); - break; - - case OP_STD: - rs = get_rs(inst); - switch (inst & 3) { - case 0: /* std */ - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 8, 1); - break; - case 1: /* stdu */ - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - default: - emulated = EMULATE_FAIL; - } - break; - - case OP_STWU: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_STB: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 1, 1); - break; - - case OP_STBU: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 1, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_LHZ: - emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1); - break; - - case OP_LHZU: - emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_LHA: - emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1); - break; - - case OP_LHAU: - emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_STH: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 2, 1); - break; - - case OP_STHU: - emulated = kvmppc_handle_store(run, vcpu, - kvmppc_get_gpr(vcpu, rs), 2, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - -#ifdef CONFIG_PPC_FPU case OP_LFS: if (kvmppc_check_fp_disabled(vcpu)) return EMULATE_DONE; @@ -684,6 +496,7 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) break; } +out: if (emulated == EMULATE_FAIL) { advance = 0; kvmppc_core_queue_program(vcpu, 0); -- cgit v1.2.3-59-g8ed1b