diff options
| author | Mihai Caraman <mihai.caraman@freescale.com> | 2012-10-11 06:13:21 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2012-12-06 01:34:11 +0100 |
| commit | e51f8f32d6b82f4a34dbb5781769c79b813e5694 (patch) | |
| tree | 5596f43d7e8718875bd7099fea2b3dc804441384 /arch/powerpc/kvm | |
| parent | ff594746845877c0a6402be23897df659188eacb (diff) | |
| download | linux-e51f8f32d6b82f4a34dbb5781769c79b813e5694.tar.bz2 | |
KVM: PPC: bookehv64: Add support for interrupt handling
Add interrupt handling support for 64-bit bookehv hosts. Unify 32 and 64 bit
implementations using a common stack layout and a common execution flow starting
from kvm_handler_common macro. Update documentation for 64-bit input register
values. This patch only address the bolted TLB miss exception handlers version.
Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/bookehv_interrupts.S | 138 |
1 files changed, 130 insertions, 8 deletions
diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index fa6d5529ebfb..e8ed7d659c55 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -16,6 +16,7 @@ * * Author: Varun Sethi <varun.sethi@freescale.com> * Author: Scott Wood <scotwood@freescale.com> + * Author: Mihai Caraman <mihai.caraman@freescale.com> * * This file is derived from arch/powerpc/kvm/booke_interrupts.S */ @@ -30,28 +31,33 @@ #include <asm/bitsperlong.h> #include <asm/thread_info.h> +#ifdef CONFIG_64BIT +#include <asm/exception-64e.h> +#else #include "../kernel/head_booke.h" /* for THREAD_NORMSAVE() */ +#endif #define LONGBYTES (BITS_PER_LONG / 8) #define VCPU_GUEST_SPRG(n) (VCPU_GUEST_SPRGS + (n * LONGBYTES)) /* The host stack layout: */ -#define HOST_R1 (0 * LONGBYTES) /* Implied by stwu. */ -#define HOST_CALLEE_LR (1 * LONGBYTES) -#define HOST_RUN (2 * LONGBYTES) /* struct kvm_run */ +#define HOST_R1 0 /* Implied by stwu. */ +#define HOST_CALLEE_LR PPC_LR_STKOFF +#define HOST_RUN (HOST_CALLEE_LR + LONGBYTES) /* * r2 is special: it holds 'current', and it made nonvolatile in the * kernel with the -ffixed-r2 gcc option. */ -#define HOST_R2 (3 * LONGBYTES) -#define HOST_CR (4 * LONGBYTES) -#define HOST_NV_GPRS (5 * LONGBYTES) +#define HOST_R2 (HOST_RUN + LONGBYTES) +#define HOST_CR (HOST_R2 + LONGBYTES) +#define HOST_NV_GPRS (HOST_CR + LONGBYTES) #define __HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * LONGBYTES)) #define HOST_NV_GPR(n) __HOST_NV_GPR(__REG_##n) #define HOST_MIN_STACK_SIZE (HOST_NV_GPR(R31) + LONGBYTES) #define HOST_STACK_SIZE ((HOST_MIN_STACK_SIZE + 15) & ~15) /* Align. */ -#define HOST_STACK_LR (HOST_STACK_SIZE + LONGBYTES) /* In caller stack frame. */ +/* LR in caller stack frame. */ +#define HOST_STACK_LR (HOST_STACK_SIZE + PPC_LR_STKOFF) #define NEED_EMU 0x00000001 /* emulation -- save nv regs */ #define NEED_DEAR 0x00000002 /* save faulting DEAR */ @@ -198,6 +204,122 @@ b kvmppc_resume_host .endm +#ifdef CONFIG_64BIT +/* Exception types */ +#define EX_GEN 1 +#define EX_GDBELL 2 +#define EX_DBG 3 +#define EX_MC 4 +#define EX_CRIT 5 +#define EX_TLB 6 + +/* + * For input register values, see arch/powerpc/include/asm/kvm_booke_hv_asm.h + */ +.macro kvm_handler intno type scratch, paca_ex, ex_r10, ex_r11, srr0, srr1, flags + _GLOBAL(kvmppc_handler_\intno\()_\srr1) + mr r11, r4 + /* + * Get vcpu from Paca: paca->__current.thread->kvm_vcpu + */ + PPC_LL r4, PACACURRENT(r13) + PPC_LL r4, (THREAD + THREAD_KVM_VCPU)(r4) + stw r10, VCPU_CR(r4) + PPC_STL r11, VCPU_GPR(R4)(r4) + PPC_STL r5, VCPU_GPR(R5)(r4) + .if \type == EX_CRIT + PPC_LL r5, (\paca_ex + EX_R13)(r13) + .else + mfspr r5, \scratch + .endif + PPC_STL r6, VCPU_GPR(R6)(r4) + PPC_STL r8, VCPU_GPR(R8)(r4) + PPC_STL r9, VCPU_GPR(R9)(r4) + PPC_STL r5, VCPU_GPR(R13)(r4) + PPC_LL r6, (\paca_ex + \ex_r10)(r13) + PPC_LL r8, (\paca_ex + \ex_r11)(r13) + PPC_STL r3, VCPU_GPR(R3)(r4) + PPC_STL r7, VCPU_GPR(R7)(r4) + PPC_STL r12, VCPU_GPR(R12)(r4) + PPC_STL r6, VCPU_GPR(R10)(r4) + PPC_STL r8, VCPU_GPR(R11)(r4) + mfctr r5 + PPC_STL r5, VCPU_CTR(r4) + mfspr r5, \srr0 + mfspr r6, \srr1 + kvm_handler_common \intno, \srr0, \flags +.endm + +#define EX_PARAMS(type) \ + EX_##type, \ + SPRN_SPRG_##type##_SCRATCH, \ + PACA_EX##type, \ + EX_R10, \ + EX_R11 + +#define EX_PARAMS_TLB \ + EX_TLB, \ + SPRN_SPRG_GEN_SCRATCH, \ + PACA_EXTLB, \ + EX_TLB_R10, \ + EX_TLB_R11 + +kvm_handler BOOKE_INTERRUPT_CRITICAL, EX_PARAMS(CRIT), \ + SPRN_CSRR0, SPRN_CSRR1, 0 +kvm_handler BOOKE_INTERRUPT_MACHINE_CHECK, EX_PARAMS(MC), \ + SPRN_MCSRR0, SPRN_MCSRR1, 0 +kvm_handler BOOKE_INTERRUPT_DATA_STORAGE, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1,(NEED_EMU | NEED_DEAR | NEED_ESR) +kvm_handler BOOKE_INTERRUPT_INST_STORAGE, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, NEED_ESR +kvm_handler BOOKE_INTERRUPT_EXTERNAL, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_ALIGNMENT, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1,(NEED_DEAR | NEED_ESR) +kvm_handler BOOKE_INTERRUPT_PROGRAM, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1,NEED_ESR +kvm_handler BOOKE_INTERRUPT_FP_UNAVAIL, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_AP_UNAVAIL, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_DECREMENTER, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_FIT, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_WATCHDOG, EX_PARAMS(CRIT),\ + SPRN_CSRR0, SPRN_CSRR1, 0 +/* + * Only bolted TLB miss exception handlers are supported for now + */ +kvm_handler BOOKE_INTERRUPT_DTLB_MISS, EX_PARAMS_TLB, \ + SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR | NEED_ESR) +kvm_handler BOOKE_INTERRUPT_ITLB_MISS, EX_PARAMS_TLB, \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_SPE_UNAVAIL, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_SPE_FP_DATA, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_SPE_FP_ROUND, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_PERFORMANCE_MONITOR, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_DOORBELL, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_DOORBELL_CRITICAL, EX_PARAMS(CRIT), \ + SPRN_CSRR0, SPRN_CSRR1, 0 +kvm_handler BOOKE_INTERRUPT_HV_PRIV, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, NEED_EMU +kvm_handler BOOKE_INTERRUPT_HV_SYSCALL, EX_PARAMS(GEN), \ + SPRN_SRR0, SPRN_SRR1, 0 +kvm_handler BOOKE_INTERRUPT_GUEST_DBELL, EX_PARAMS(GDBELL), \ + SPRN_GSRR0, SPRN_GSRR1, 0 +kvm_handler BOOKE_INTERRUPT_GUEST_DBELL_CRIT, EX_PARAMS(CRIT), \ + SPRN_CSRR0, SPRN_CSRR1, 0 +kvm_handler BOOKE_INTERRUPT_DEBUG, EX_PARAMS(DBG), \ + SPRN_DSRR0, SPRN_DSRR1, 0 +kvm_handler BOOKE_INTERRUPT_DEBUG, EX_PARAMS(CRIT), \ + SPRN_CSRR0, SPRN_CSRR1, 0 +#else /* * For input register values, see arch/powerpc/include/asm/kvm_booke_hv_asm.h */ @@ -292,7 +414,7 @@ kvm_lvl_handler BOOKE_INTERRUPT_DEBUG, \ SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0 kvm_lvl_handler BOOKE_INTERRUPT_DEBUG, \ SPRN_SPRG_RSCRATCH_DBG, SPRN_DSRR0, SPRN_DSRR1, 0 - +#endif /* Registers: * SPRG_SCRATCH0: guest r10 |