diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 158 |
1 files changed, 155 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 9af264840b9..319ff63b1f3 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -166,6 +166,14 @@ kvmppc_hv_entry: /* Save R1 in the PACA */ std r1, HSTATE_HOST_R1(r13) + /* Increment yield count if they have a VPA */ + ld r3, VCPU_VPA(r4) + cmpdi r3, 0 + beq 25f + lwz r5, LPPACA_YIELDCOUNT(r3) + addi r5, r5, 1 + stw r5, LPPACA_YIELDCOUNT(r3) +25: /* Load up DAR and DSISR */ ld r5, VCPU_DAR(r4) lwz r6, VCPU_DSISR(r4) @@ -401,6 +409,10 @@ kvmppc_interrupt: cmpwi r3,0 bge ignore_hdec 2: + /* See if this is something we can handle in real mode */ + cmpwi r12,BOOK3S_INTERRUPT_SYSCALL + beq hcall_try_real_mode +hcall_real_cont: /* Check for mediated interrupts (could be done earlier really ...) */ cmpwi r12,BOOK3S_INTERRUPT_EXTERNAL @@ -579,13 +591,28 @@ hdec_soon: std r5, VCPU_SPRG2(r9) std r6, VCPU_SPRG3(r9) - /* Save PMU registers */ + /* Increment yield count if they have a VPA */ + ld r8, VCPU_VPA(r9) /* do they have a VPA? */ + cmpdi r8, 0 + beq 25f + lwz r3, LPPACA_YIELDCOUNT(r8) + addi r3, r3, 1 + stw r3, LPPACA_YIELDCOUNT(r8) +25: + /* Save PMU registers if requested */ + /* r8 and cr0.eq are live here */ li r3, 1 sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */ mfspr r4, SPRN_MMCR0 /* save MMCR0 */ mtspr SPRN_MMCR0, r3 /* freeze all counters, disable ints */ isync - mfspr r5, SPRN_MMCR1 + beq 21f /* if no VPA, save PMU stuff anyway */ + lbz r7, LPPACA_PMCINUSE(r8) + cmpwi r7, 0 /* did they ask for PMU stuff to be saved? */ + bne 21f + std r3, VCPU_MMCR(r9) /* if not, set saved MMCR0 to FC */ + b 22f +21: mfspr r5, SPRN_MMCR1 mfspr r6, SPRN_MMCRA std r4, VCPU_MMCR(r9) std r5, VCPU_MMCR + 8(r9) @@ -676,6 +703,125 @@ hdec_soon: mfspr r7,SPRN_HDSISR b 7b +/* + * Try to handle an hcall in real mode. + * Returns to the guest if we handle it, or continues on up to + * the kernel if we can't (i.e. if we don't have a handler for + * it, or if the handler returns H_TOO_HARD). + */ + .globl hcall_try_real_mode +hcall_try_real_mode: + ld r3,VCPU_GPR(r3)(r9) + andi. r0,r11,MSR_PR + bne hcall_real_cont + clrrdi r3,r3,2 + cmpldi r3,hcall_real_table_end - hcall_real_table + bge hcall_real_cont + LOAD_REG_ADDR(r4, hcall_real_table) + lwzx r3,r3,r4 + cmpwi r3,0 + beq hcall_real_cont + add r3,r3,r4 + mtctr r3 + mr r3,r9 /* get vcpu pointer */ + ld r4,VCPU_GPR(r4)(r9) + bctrl + cmpdi r3,H_TOO_HARD + beq hcall_real_fallback + ld r4,HSTATE_KVM_VCPU(r13) + std r3,VCPU_GPR(r3)(r4) + ld r10,VCPU_PC(r4) + ld r11,VCPU_MSR(r4) + b fast_guest_return + + /* We've attempted a real mode hcall, but it's punted it back + * to userspace. We need to restore some clobbered volatiles + * before resuming the pass-it-to-qemu path */ +hcall_real_fallback: + li r12,BOOK3S_INTERRUPT_SYSCALL + ld r9, HSTATE_KVM_VCPU(r13) + ld r11, VCPU_MSR(r9) + + b hcall_real_cont + + .globl hcall_real_table +hcall_real_table: + .long 0 /* 0 - unused */ + .long .kvmppc_h_remove - hcall_real_table + .long .kvmppc_h_enter - hcall_real_table + .long .kvmppc_h_read - hcall_real_table + .long 0 /* 0x10 - H_CLEAR_MOD */ + .long 0 /* 0x14 - H_CLEAR_REF */ + .long .kvmppc_h_protect - hcall_real_table + .long 0 /* 0x1c - H_GET_TCE */ + .long 0 /* 0x20 - H_SET_TCE */ + .long 0 /* 0x24 - H_SET_SPRG0 */ + .long .kvmppc_h_set_dabr - hcall_real_table + .long 0 /* 0x2c */ + .long 0 /* 0x30 */ + .long 0 /* 0x34 */ + .long 0 /* 0x38 */ + .long 0 /* 0x3c */ + .long 0 /* 0x40 */ + .long 0 /* 0x44 */ + .long 0 /* 0x48 */ + .long 0 /* 0x4c */ + .long 0 /* 0x50 */ + .long 0 /* 0x54 */ + .long 0 /* 0x58 */ + .long 0 /* 0x5c */ + .long 0 /* 0x60 */ + .long 0 /* 0x64 */ + .long 0 /* 0x68 */ + .long 0 /* 0x6c */ + .long 0 /* 0x70 */ + .long 0 /* 0x74 */ + .long 0 /* 0x78 */ + .long 0 /* 0x7c */ + .long 0 /* 0x80 */ + .long 0 /* 0x84 */ + .long 0 /* 0x88 */ + .long 0 /* 0x8c */ + .long 0 /* 0x90 */ + .long 0 /* 0x94 */ + .long 0 /* 0x98 */ + .long 0 /* 0x9c */ + .long 0 /* 0xa0 */ + .long 0 /* 0xa4 */ + .long 0 /* 0xa8 */ + .long 0 /* 0xac */ + .long 0 /* 0xb0 */ + .long 0 /* 0xb4 */ + .long 0 /* 0xb8 */ + .long 0 /* 0xbc */ + .long 0 /* 0xc0 */ + .long 0 /* 0xc4 */ + .long 0 /* 0xc8 */ + .long 0 /* 0xcc */ + .long 0 /* 0xd0 */ + .long 0 /* 0xd4 */ + .long 0 /* 0xd8 */ + .long 0 /* 0xdc */ + .long 0 /* 0xe0 */ + .long 0 /* 0xe4 */ + .long 0 /* 0xe8 */ + .long 0 /* 0xec */ + .long 0 /* 0xf0 */ + .long 0 /* 0xf4 */ + .long 0 /* 0xf8 */ + .long 0 /* 0xfc */ + .long 0 /* 0x100 */ + .long 0 /* 0x104 */ + .long 0 /* 0x108 */ + .long 0 /* 0x10c */ + .long 0 /* 0x110 */ + .long 0 /* 0x114 */ + .long 0 /* 0x118 */ + .long 0 /* 0x11c */ + .long 0 /* 0x120 */ + .long .kvmppc_h_bulk_remove - hcall_real_table +hcall_real_table_end: + ignore_hdec: mr r4,r9 b fast_guest_return @@ -688,10 +834,16 @@ bounce_ext_interrupt: LOAD_REG_IMMEDIATE(r11,MSR_SF | MSR_ME); b fast_guest_return +_GLOBAL(kvmppc_h_set_dabr) + std r4,VCPU_DABR(r3) + mtspr SPRN_DABR,r4 + li r3,0 + blr + /* * Save away FP, VMX and VSX registers. * r3 = vcpu pointer -*/ + */ _GLOBAL(kvmppc_save_fp) mfmsr r9 ori r8,r9,MSR_FP |