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Edit File: trap_block.h

/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _SPARC_TRAP_BLOCK_H #define _SPARC_TRAP_BLOCK_H #include <linux/threads.h> #include <asm/hypervisor.h> #include <asm/asi.h> #ifndef __ASSEMBLY__ /* Trap handling code needs to get at a few critical values upon * trap entry and to process TSB misses. These cannot be in the * per_cpu() area as we really need to lock them into the TLB and * thus make them part of the main kernel image. As a result we * try to make this as small as possible. * * This is padded out and aligned to 64-bytes to avoid false sharing * on SMP. */ /* If you modify the size of this structure, please update * TRAP_BLOCK_SZ_SHIFT below. */ struct thread_info; struct trap_per_cpu { /* D-cache line 1: Basic thread information, cpu and device mondo queues */ struct thread_info *thread; unsigned long pgd_paddr; unsigned long cpu_mondo_pa; unsigned long dev_mondo_pa; /* D-cache line 2: Error Mondo Queue and kernel buffer pointers */ unsigned long resum_mondo_pa; unsigned long resum_kernel_buf_pa; unsigned long nonresum_mondo_pa; unsigned long nonresum_kernel_buf_pa; /* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */ struct hv_fault_status fault_info; /* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */ unsigned long cpu_mondo_block_pa; unsigned long cpu_list_pa; unsigned long tsb_huge; unsigned long tsb_huge_temp; /* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size. */ unsigned long irq_worklist_pa; unsigned int cpu_mondo_qmask; unsigned int dev_mondo_qmask; unsigned int resum_qmask; unsigned int nonresum_qmask; unsigned long __per_cpu_base; } __attribute__((aligned(64))); extern struct trap_per_cpu trap_block[NR_CPUS]; void init_cur_cpu_trap(struct thread_info *); void setup_tba(void); extern int ncpus_probed; extern u64 cpu_mondo_counter[NR_CPUS]; unsigned long real_hard_smp_processor_id(void); struct cpuid_patch_entry { unsigned int addr; unsigned int cheetah_safari[4]; unsigned int cheetah_jbus[4]; unsigned int starfire[4]; unsigned int sun4v[4]; }; extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end; struct sun4v_1insn_patch_entry { unsigned int addr; unsigned int insn; }; extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch, __sun4v_1insn_patch_end; extern struct sun4v_1insn_patch_entry __fast_win_ctrl_1insn_patch, __fast_win_ctrl_1insn_patch_end; extern struct sun4v_1insn_patch_entry __sun_m7_1insn_patch, __sun_m7_1insn_patch_end; struct sun4v_2insn_patch_entry { unsigned int addr; unsigned int insns[2]; }; extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch, __sun4v_2insn_patch_end; extern struct sun4v_2insn_patch_entry __sun_m7_2insn_patch, __sun_m7_2insn_patch_end; #endif /* !(__ASSEMBLY__) */ #define TRAP_PER_CPU_THREAD 0x00 #define TRAP_PER_CPU_PGD_PADDR 0x08 #define TRAP_PER_CPU_CPU_MONDO_PA 0x10 #define TRAP_PER_CPU_DEV_MONDO_PA 0x18 #define TRAP_PER_CPU_RESUM_MONDO_PA 0x20 #define TRAP_PER_CPU_RESUM_KBUF_PA 0x28 #define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30 #define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38 #define TRAP_PER_CPU_FAULT_INFO 0x40 #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0 #define TRAP_PER_CPU_CPU_LIST_PA 0xc8 #define TRAP_PER_CPU_TSB_HUGE 0xd0 #define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8 #define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0 #define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8 #define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec #define TRAP_PER_CPU_RESUM_QMASK 0xf0 #define TRAP_PER_CPU_NONRESUM_QMASK 0xf4 #define TRAP_PER_CPU_PER_CPU_BASE 0xf8 #define TRAP_BLOCK_SZ_SHIFT 8 #include <asm/scratchpad.h> #define __GET_CPUID(REG) \ /* Spitfire implementation (default). */ \ 661: ldxa [%g0] ASI_UPA_CONFIG, REG; \ srlx REG, 17, REG; \ and REG, 0x1f, REG; \ nop; \ .section .cpuid_patch, "ax"; \ /* Instruction location. */ \ .word 661b; \ /* Cheetah Safari implementation. */ \ ldxa [%g0] ASI_SAFARI_CONFIG, REG; \ srlx REG, 17, REG; \ and REG, 0x3ff, REG; \ nop; \ /* Cheetah JBUS implementation. */ \ ldxa [%g0] ASI_JBUS_CONFIG, REG; \ srlx REG, 17, REG; \ and REG, 0x1f, REG; \ nop; \ /* Starfire implementation. */ \ sethi %hi(0x1fff40000d0 >> 9), REG; \ sllx REG, 9, REG; \ or REG, 0xd0, REG; \ lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\ /* sun4v implementation. */ \ mov SCRATCHPAD_CPUID, REG; \ ldxa [REG] ASI_SCRATCHPAD, REG; \ nop; \ nop; \ .previous; #ifdef CONFIG_SMP #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ __GET_CPUID(TMP) \ sethi %hi(trap_block), DEST; \ sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \ or DEST, %lo(trap_block), DEST; \ add DEST, TMP, DEST; \ /* Clobbers TMP, current address space PGD phys address into DEST. */ #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \ TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST; /* Clobbers TMP, loads DEST with current thread info pointer. */ #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ ldx [DEST + TRAP_PER_CPU_THREAD], DEST; /* Given the current thread info pointer in THR, load the per-cpu * area base of the current processor into DEST. REG1, REG2, and REG3 are * clobbered. * * You absolutely cannot use DEST as a temporary in this code. The * reason is that traps can happen during execution, and return from * trap will load the fully resolved DEST per-cpu base. This can corrupt * the calculations done by the macro mid-stream. */ #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \ lduh [THR + TI_CPU], REG1; \ sethi %hi(trap_block), REG2; \ sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \ or REG2, %lo(trap_block), REG2; \ add REG2, REG1, REG2; \ ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST; #else #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ sethi %hi(trap_block), DEST; \ or DEST, %lo(trap_block), DEST; \ /* Uniprocessor versions, we know the cpuid is zero. */ #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \ TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST; #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ ldx [DEST + TRAP_PER_CPU_THREAD], DEST; /* No per-cpu areas on uniprocessor, so no need to load DEST. */ #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) #endif /* !(CONFIG_SMP) */ #endif /* _SPARC_TRAP_BLOCK_H */