468 lines
14 KiB
C
468 lines
14 KiB
C
/*
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*
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* Copyright (C) 2015 MCST
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*
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* Defenition of traps handling routines.
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*/
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#ifndef _E2K_KVM_TRAP_TABLE_ASM_H
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#define _E2K_KVM_TRAP_TABLE_ASM_H
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#ifdef __ASSEMBLY__
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#include <asm/thread_info.h>
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#include <asm/e2k_api.h>
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#include <asm/cpu_regs_types.h>
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#include <asm/glob_regs.h>
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#include <asm/mmu_regs_types.h>
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#include <generated/asm-offsets.h>
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#if defined CONFIG_SMP
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# define SMP_ONLY(...) __VA_ARGS__
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#else
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# define SMP_ONLY(...)
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#endif
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#ifdef CONFIG_KVM_HOST_MODE
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/* it is host kernel with virtualization support */
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/* or paravirtualized host and guest kernel */
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.macro DO_SWITCH_TO_KERNEL_IMAGE_PGD rti, predN, rtmp0, rtmp1, rtmp2
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/* do switch to host kernel image */
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/* thread_info_t *ti = rti */
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/* %pred_no is true to switch to kernel image pgd */
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/* if guest and host kernel images are loaded to equal */
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/* addresses, then switch from one to another must */
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/* flush all caches, including TLB */
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/* if (%pred_no) { */
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/* native_flush_TLB_all(); */
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/* native_flush_CACHE_all(); */
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/* E2K_WAIT_FLUSH; */
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/* } */
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{
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ldd [\rti + TI_KERNEL_IMAGE_PGD_P], \rtmp1 ? \predN;
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ldd [\rti + TI_KERNEL_IMAGE_PGD], \rtmp2 ? \predN;
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addd 0, 0, \rtmp0 ? \predN;
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}
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{
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std,2 \rtmp0, [_FLUSH_TLB_ALL_OP] MAS_TLB_FLUSH ? \predN;
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std \rtmp2, [\rtmp1] ? \predN;
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}
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{
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std,2 \rtmp0, [_FLUSH_CACHE_L12_OP] MAS_CACHE_FLUSH ? \predN;
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}
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wait fl_c = 1;
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.endm /* DO_SWITCH_TO_KERNEL_IMAGE_PGD */
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.macro SWITCH_TO_KERNEL_IMAGE_PGD rti predN rtmp0, rtmp1, rtmp2
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/* switch to host kernel image */
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/* thread_info_t *ti = rti; */
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/* if (ti->flags & _TIF_PARAVIRT_GUEST) { */
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/* *ti->kernel_image_pgd_p = ti->kernel_image_pgd; */
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/* native_flush_TLB_all(); */
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/* native_flush_CACHE_all(); */
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/* E2K_WAIT_FLUSH; */
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/* } */
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/* rti: current_thread_info */
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ldd [\rti + TI_FLAGS], \rtmp0;
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cmpandedb \rtmp0, _TIF_PARAVIRT_GUEST, \predN;
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{
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pass \predN, @p0;
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landp ~@p0, ~@p0, @p4;
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pass @p4, \predN;
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}
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DO_SWITCH_TO_KERNEL_IMAGE_PGD \rti, \predN, \rtmp0, \rtmp1, \rtmp2
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.endm
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/*
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* goto guest kernel system call table entry, if system call is from guest user
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* rti: register of current_thread_info()
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* rtmp0 rtmp1 rtmp2: temporary registers
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* ptmp0 ptmp1 ptmp2: temporary predicates
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*/
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.macro GOTO_GUEST_KERNEL_TTABLE entry_num rti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1 ptmp2
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/* thread_info_t *ti = %dr7 */
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/* e2k_cr1_lo_t cr1_lo = NATIVE_READ_CR1_LO_REG(); */
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/* */
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/* if ((ti->flags & _TIF_VIRTUALIZED_GUEST)) && { */
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/* !(cr1_lo.CR1_lo_psr & PSR_PM)) { */
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/* if (ti->flags & _TIF_PARAVIRT_GUEST) { */
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/* DO_SWITCH_TO_KERNEL_IMAGE_PGD() */
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/* } */
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/* goto goto_guest_kernel_ttable_C( */
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/* sys_num << 32 | entry, */
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/* arg1, arg2, arg3, arg4, */
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/* arg5, arg6); */
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/* } */
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.global goto_guest_kernel_ttable_C;
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{
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rrd %cr1.lo, \rtmp1;
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ldd [\rti + TI_FLAGS], \rtmp0;
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sxt 2, %r0, %dr0;
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}
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{
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cmpandedb \rtmp1, CR1_LO_PSR_PM_MASK, \ptmp1;
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cmpandedb \rtmp0, _TIF_VIRTUALIZED_GUEST, \ptmp0;
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cmpandedb \rtmp0, _TIF_PARAVIRT_GUEST, \ptmp2;
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}
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{
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pass \ptmp0, @p0;
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pass \ptmp1, @p1;
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landp ~@p0, @p1, @p4;
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pass @p4, \ptmp0;
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pass \ptmp2, @p2;
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landp ~@p2, ~@p2, @p5;
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pass @p5, \ptmp1;
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}
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{
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puttagd %dr1, 0, %dr1 ? \ptmp0;
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puttagd %dr2, 0, %dr2 ? \ptmp0;
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shld %dr0, 32, %dr0 ? \ptmp0;
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}
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{
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SMP_ONLY(shld,1 GCPUID_PREEMPT, 3, GCPUOFFSET ? \ptmp0)
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puttagd %dr3, 0, %dr3 ? \ptmp0;
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puttagd %dr4, 0, %dr4 ? \ptmp0;
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ord %dr0, \entry_num, %dr0 ? \ptmp0;
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}
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{
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puttagd %dr5, 0, %dr5 ? \ptmp0;
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puttagd %dr6, 0, %dr6 ? \ptmp0;
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}
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/* rti: current_thread_info */
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/* ptmp1 : predicate is true if need switch kernel image pgd */
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/* rtmp0, rtmp1, rtmp2: temporary registers */
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DO_SWITCH_TO_KERNEL_IMAGE_PGD \rti, \ptmp1, \rtmp0, \rtmp1, \rtmp2
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{
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SMP_ONLY(ldd,2 [ __per_cpu_offset + GCPUOFFSET ], GCPUOFFSET ? \ptmp0)
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puttagd %dr7, 0, %dr7 ? \ptmp0;
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ibranch goto_guest_kernel_ttable_C ? \ptmp0;
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}
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#ifdef CONFIG_CPU_HWBUG_IBRANCH
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{nop} {nop}
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#endif
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.endm /* GOTO_GUEST_KERNEL_TTABLE */
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# ifdef CONFIG_PARAVIRT_GUEST
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/*
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* goto guest kernel system call table entry, if system call is from guest user
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* rti: register of current_thread_info()
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* rtmp0 rtmp1 rtmp2: temporary registers
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* ptmp0 ptmp1: temporary predicates
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*/
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.macro GOTO_PV_VCPU_KERNEL_TTABLE rti rtmp0 rtmp1 rtmp2 ptmp1
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/* thread_info_t *ti = %dr7 */
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/* e2k_cr1_lo_t cr1_lo = NATIVE_READ_CR1_LO_REG(); */
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/* */
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/* if (ti->flags & _TIF_PARAVIRT_GUEST) { */
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/* DO_SWITCH_TO_KERNEL_IMAGE_PGD() */
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/* } */
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{
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ldd [\rti + TI_FLAGS], \rtmp0;
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sxt 2, %r0, %dr0;
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}
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{
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cmpandedb \rtmp0, _TIF_PARAVIRT_GUEST, \ptmp1;
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}
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{
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pass \ptmp1, @p2;
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landp ~@p2, ~@p2, @p5;
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pass @p5, \ptmp1;
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}
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/* rti: current_thread_info */
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/* ptmp1 : predicate is true if need switch kernel image pgd */
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/* rtmp0, rtmp1, rtmp2: temporary registers */
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DO_SWITCH_TO_KERNEL_IMAGE_PGD \rti, \ptmp1, \rtmp0, \rtmp1, \rtmp2
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.endm /* GOTO_GUEST_KERNEL_TTABLE */
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# else
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.macro GOTO_PV_VCPU_KERNEL_TTABLE rti rtmp0 rtmp1 rtmp2 ptmp1
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.endm
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# endif /* CONFIG_PARAVIRT_GUEST */
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/*
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* goto guest kernel fast system call table entry, if system call is
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* from guest user
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* rtmpti: temporary register to read current_thread_info()
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* rtmp0 rtmp1 rtmp2: temporary registers
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* ptmp0 ptmp1 ptmp2: temporary predicates
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*/
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.macro GOTO_GUEST_KERNEL_FAST_TTABLE entry_num rtmpti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1 ptmp2
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{
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setwd wsz = 8, nfx = 1;
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nop 1;
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rrd %osr0, \rtmpti;
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ipd 2;
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}
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GOTO_GUEST_KERNEL_TTABLE \entry_num, \rtmpti, \rtmp0, \rtmp1, \rtmp2, \
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\ptmp0, \ptmp1, \ptmp2
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.endm /* GOTO_GUEST_KERNEL_FAST_TTABLE */
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/*
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* goto guest kernel protected system call table entry, if system call is
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* from guest user
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* rti: register of current_thread_info()
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* rtmp0 rtmp1 rtmp2: temporary registers
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* ptmp0 ptmp1 ptmp2: temporary predicates
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* FIXME: is not implemented
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*/
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.macro GOTO_GUEST_KERNEL_PROT_TTABLE entry_num rti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1 ptmp2
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GOTO_GUEST_KERNEL_TTABLE \entry_num, \rti, \rtmp0, \rtmp1, \rtmp2, \
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\ptmp0, \ptmp1, \ptmp2
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.endm /* GOTO_GUEST_KERNEL_PROT_TTABLE */
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#else /* ! CONFIG_KVM_HOST_MODE */
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.macro SWITCH_TO_KERNEL_IMAGE_PGD rti predN rtmp0, rtmp1, rtmp2
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/* not used */
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.endm /* SWITCH_TO_KERNEL_IMAGE_PGD */
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.macro GOTO_GUEST_KERNEL_TTABLE entry_num rti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1 ptmp2
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/* not used */
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.endm /* GOTO_GUEST_KERNEL_TTABLE */
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.macro GOTO_GUEST_KERNEL_FAST_TTABLE entry_num rtmpti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1 ptmp2
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/* not used */
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.endm /* GOTO_GUEST_KERNEL_FAST_TTABLE */
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.macro GOTO_GUEST_KERNEL_PROT_TTABLE entry_num rti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1 ptmp2
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/* not used */
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.endm /* GOTO_GUEST_KERNEL_PROT_TTABLE */
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.macro GOTO_PV_VCPU_KERNEL_TTABLE entry_num rti rtmp0 rtmp1 rtmp2 \
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ptmp0 ptmp1
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/* not used */
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.endm /* GOTO_PV_VCPU_KERNEL_TTABLE */
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#endif /* CONFIG_KVM_HOST_MODE */
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/*
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* Save current state of pair of global registers with tags and extensions
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* gpair_lo/gpair_hi is pair of adjacent global registers, lo is even
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* and hi is odd (for example GCURTI/GCURTASK)
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* kreg_lo, kreg_hi is pair of indexes of global registers into structure
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* to save these k_gregs.g[kregd_lo/kreg_hi]
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* rbase is register containing base address to save global
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* registers pair values (for example glob_regs_t structure
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* or thread_info_t thread_info->k_gregs/h_gregs)
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* predSAVE conditional save on this predicate
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* rtmp0/rtmp1 two temporary registers (for example %dr20, %dr21)
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*/
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.macro SAVE_GREGS_PAIR_COND_V3 gpair_lo, gpair_hi, kreg_lo, kreg_hi, rbase, \
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predSAVE, rtmp0, rtmp1
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{
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strd,2 %dg\gpair_lo, [\rbase + (TAGGED_MEM_STORE_REC_OPC + \
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\kreg_lo * GLOB_REG_SIZE + \
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GLOB_REG_BASE)] ? \predSAVE;
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strd,5 %dg\gpair_hi, [\rbase + (TAGGED_MEM_STORE_REC_OPC + \
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\kreg_hi * GLOB_REG_SIZE + \
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GLOB_REG_BASE)] ? \predSAVE;
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movfi,1 %dg\gpair_lo, \rtmp0 ? \predSAVE;
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movfi,4 %dg\gpair_hi, \rtmp1 ? \predSAVE;
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}
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{
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sth \rtmp0, [\rbase + (\kreg_lo * GLOB_REG_SIZE + \
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GLOB_REG_EXT)] ? \predSAVE;
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sth \rtmp1, [\rbase + (\kreg_hi * GLOB_REG_SIZE + \
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GLOB_REG_EXT)] ? \predSAVE;
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}
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.endm /* SAVE_GREGS_PAIR_COND_V3 */
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/* Bug 116851 - all strqp must be speculative if dealing with tags */
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.macro SAVE_GREGS_PAIR_COND_V5 gpair_lo, gpair_hi, kreg_lo, kreg_hi, rbase, \
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predSAVE
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{
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strqp,2,sm %dg\gpair_lo, [\rbase + (TAGGED_MEM_STORE_REC_OPC + \
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\kreg_lo * GLOB_REG_SIZE + \
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GLOB_REG_BASE)] ? \predSAVE;
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strqp,5,sm %dg\gpair_hi, [\rbase + (TAGGED_MEM_STORE_REC_OPC + \
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\kreg_hi * GLOB_REG_SIZE + \
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GLOB_REG_BASE)] ? \predSAVE;
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}
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.endm /* SAVE_GREGS_PAIR_COND_V5 */
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.macro SAVE_GREG_UNEXT greg, kreg, rbase
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strqp,sm \greg, [\rbase + (TAGGED_MEM_STORE_REC_OPC + \
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\kreg * GLOB_REG_SIZE + \
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GLOB_REG_BASE)];
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.endm /* SAVE_GREG_UNEXT */
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.macro SAVE_GREGS_PAIR_UNEXT greg1, greg2, kreg1, kreg2, rbase
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{
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SAVE_GREG_UNEXT \greg1, kreg1, rbase
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SAVE_GREG_UNEXT \greg2, kreg2, rbase
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}
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.endm /* SAVE_GREGS_PAIR_UNEXT */
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.macro ASM_SET_KERNEL_GREGS_PAIR gpair_lo, gpair_hi, rval_lo, rval_hi
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{
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addd \rval_lo, 0, %dg\gpair_lo;
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addd \rval_hi, 0, %dg\gpair_hi;
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}
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.endm /* ASM_SET_CURRENTS_GREGS_PAIR */
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.macro DO_ASM_SET_KERNEL_GREGS_PAIR gpair_lo, gpair_hi, rval_lo, rval_hi
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ASM_SET_KERNEL_GREGS_PAIR \gpair_lo, \gpair_hi, \
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\rval_lo, \rval_hi
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.endm /* DO_ASM_SET_KERNEL_GREGS_PAIR */
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.macro SET_KERNEL_GREGS runused, rtask, rpercpu_off, rcpu
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DO_ASM_SET_KERNEL_GREGS_PAIR \
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GUEST_VCPU_STATE_GREG, CURRENT_TASK_GREG, \
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\runused, \rtask
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DO_ASM_SET_KERNEL_GREGS_PAIR \
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MY_CPU_OFFSET_GREG, SMP_CPU_ID_GREG, \
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\rpercpu_off, \rcpu
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.endm /* SET_KERNEL_GREGS */
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.macro ONLY_SET_KERNEL_GREGS runused, rtask, rpercpu_off, rcpu
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SET_KERNEL_GREGS \runused, \rtask, \rpercpu_off, \rcpu
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.endm /* ONLY_SET_KERNEL_GREGS */
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#ifdef CONFIG_KVM_HOST_MODE
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/* it is host kernel with virtualization support */
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/* or paravirtualized host and guest kernel */
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.macro DO_SAVE_HOST_GREGS_V3 gvcpu_lo, gvcpu_hi, hvcpu_lo, hvcpu_hi \
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drti, predSAVE, drtmp, rtmp0, rtmp1
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/* drtmp: thread_info->h_gregs.g */
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addd \drti, TI_HOST_GREGS_TO_VIRT, \drtmp ? \predSAVE;
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SAVE_GREGS_PAIR_COND_V3 \gvcpu_lo, \gvcpu_hi, \hvcpu_lo, \hvcpu_hi, \
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\drtmp, /* thread_info->h_gregs.g base address */ \
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\predSAVE, \
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\rtmp0, \rtmp1
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.endm /* DO_SAVE_HOST_GREGS_V3 */
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.macro DO_SAVE_HOST_GREGS_V5 gvcpu_lo, gvcpu_hi, hvcpu_lo, hvcpu_hi \
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drti, predSAVE, drtmp
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/* drtmp: thread_info->h_gregs.g */
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addd \drti, TI_HOST_GREGS_TO_VIRT, \drtmp ? \predSAVE;
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SAVE_GREGS_PAIR_COND_V5 \gvcpu_lo, \gvcpu_hi, \hvcpu_lo, \hvcpu_hi, \
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\drtmp, /* thread_info->h_gregs.g base address */ \
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\predSAVE
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.endm /* DO_SAVE_HOST_GREGS_V5 */
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.macro SAVE_HOST_GREGS_V3 drti, predSAVE, drtmp, rtmp0, rtmp1
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DO_SAVE_HOST_GREGS_V3 \
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GUEST_VCPU_STATE_GREG, GUEST_VCPU_STATE_UNUSED_GREG, \
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VCPU_STATE_GREGS_PAIRS_INDEX, VCPU_STATE_GREGS_PAIRS_HI_INDEX, \
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\drti, \predSAVE, \
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\drtmp, \rtmp0, \rtmp1
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.endm /* SAVE_HOST_GREGS_V3 */
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.macro SAVE_HOST_GREGS_V5 drti, predSAVE, drtmp
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DO_SAVE_HOST_GREGS_V5 \
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GUEST_VCPU_STATE_GREG, GUEST_VCPU_STATE_UNUSED_GREG, \
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VCPU_STATE_GREGS_PAIRS_INDEX, VCPU_STATE_GREGS_PAIRS_HI_INDEX, \
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\drti, \predSAVE, \
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\drtmp,
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.endm /* SAVE_HOST_GREGS_V5 */
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.macro SAVE_HOST_GREGS_TO_VIRT_V3 drti, predSAVE, drtmp, rtmp0, rtmp1
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SAVE_HOST_GREGS_V3 \drti, \predSAVE, \drtmp, \rtmp0, \rtmp1
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.endm /* SAVE_HOST_GREGS_TO_VIRT_V3 */
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.macro SAVE_HOST_GREGS_TO_VIRT_V5 drti, predSAVE, drtmp
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SAVE_HOST_GREGS_V5 \drti, \predSAVE, \drtmp
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.endm /* SAVE_HOST_GREGS_TO_VIRT_V5 */
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.macro SAVE_HOST_GREGS_TO_VIRT_UNEXT drti, drtmp
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/* not used */
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.endm /* SAVE_HOST_GREGS_TO_VIRT_UNEXT */
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#elif defined(CONFIG_KVM_GUEST_KERNEL)
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/* it is pure guest kernel (not paravirtualized based on pv_ops) */
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#include <asm/kvm/guest/trap_table.S.h>
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#else /* ! CONFIG_KVM_HOST_MODE && ! CONFIG_KVM_GUEST_KERNEL */
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/* It is native host kernel without any virtualization */
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.macro SAVE_HOST_GREGS_TO_VIRT_V3 drti, predSAVE, drtmp, rtmp0, rtmp1
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/* not used */
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.endm /* SAVE_HOST_GREGS_TO_VIRT_V3 */
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.macro SAVE_HOST_GREGS_TO_VIRT_V5 drti, predSAVE, drtmp
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/* not used */
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.endm /* SAVE_HOST_GREGS_TO_VIRT_V5 */
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.macro SAVE_HOST_GREGS_TO_VIRT_UNEXT drti, drtmp
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/* not used */
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.endm /* SAVE_HOST_GREGS_TO_VIRT_UNEXT */
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#endif /* CONFIG_KVM_HOST_MODE */
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/*
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* same as C function above but as result should be set %pred28
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* argument sys_num_reg_no is assembler register number containing # of
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* system call (for example %r0)
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* %pred28 == 1 if system call is generic and doesn use pt_regs structure
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*/
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.macro IS_SYS_CALL_GENERIC sys_num_reg_no
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cmpesb sys_num_reg_no, __NR_clone, %pred0;
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cmpesb sys_num_reg_no, __NR_clone_thread, %pred1;
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cmpesb sys_num_reg_no, __NR_fork, %pred2;
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cmpesb sys_num_reg_no, __NR_vfork, %pred3;
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{
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pass %pred0, @p0;
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pass %pred1, @p1;
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pass %pred2, @p2;
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pass %pred3, @p3;
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andp ~@p0, ~@p1, @p4;
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andp ~@p2, ~@p3, @p5;
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andp @p4, @p5, @p6;
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pass @p6, %pred27;
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}
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cmpesb sys_num_reg_no, __NR_execve, %pred4;
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cmpesb sys_num_reg_no, __NR_rt_sigreturn, %pred5;
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cmpesb sys_num_reg_no, __NR_e2k_sigsetjmp, %pred6;
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cmpesb sys_num_reg_no, __NR_e2k_longjmp, %pred7;
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{
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pass %pred4, @p0;
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pass %pred5, @p1;
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pass %pred6, @p2;
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pass %pred7, @p3;
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andp ~@p0, ~@p1, @p4;
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andp ~@p2, ~@p3, @p5;
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andp @p4, @p5, @p6;
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pass @p6, %pred30;
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}
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cmpesb sys_num_reg_no, __NR_e2k_longjmp2, %pred8;
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cmpesb sys_num_reg_no, __NR_sigaltstack, %pred9;
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cmpesb sys_num_reg_no, __NR_rt_sigaction, %pred10;
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cmpesb sys_num_reg_no, __NR_rt_sigsuspend, %pred11;
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{
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pass %pred8, @p0;
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pass %pred9, @p1;
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pass %pred10, @p2;
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pass %pred11, @p3;
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andp ~@p0, ~@p1, @p4;
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andp ~@p2, ~@p3, @p5;
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andp @p4, @p5, @p6;
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pass @p6, %pred29;
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}
|
|
{
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nop 2;
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pass %pred27, @p0;
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pass %pred30, @p1;
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pass %pred29, @p2;
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andp @p0, @p1, @p4;
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andp @p2, @p4, @p5;
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pass @p5, %pred28;
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}
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cmpesb sys_num_reg_no, __NR_ioctl, %pred13;
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cmpesb sys_num_reg_no, __NR_ipc, %pred14;
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{
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pass %pred13, @p0;
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pass %pred14, @p1;
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pass %pred28, @p2;
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andp ~@p0, ~@p1, @p4;
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andp @p2, @p4, @p5;
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pass @p5, %pred28;
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}
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.endm /* IS_SYS_CALL_GENERIC */
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|
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#endif /* __ASSEMBLY__ */
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#endif /* _E2K_KVM_TRAP_TABLE_ASM_H */
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