diff options
Diffstat (limited to 'include/qom')
| -rw-r--r-- | include/qom/cpu.h | 40 |
1 files changed, 18 insertions, 22 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h index 98e12d914c..5ee0046b62 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -232,17 +232,25 @@ typedef struct CPUClass { bool gdb_stop_before_watchpoint; } CPUClass; +/* + * Low 16 bits: number of cycles left, used only in icount mode. + * High 16 bits: Set to -1 to force TCG to stop executing linked TBs + * for this CPU and return to its top level loop (even in non-icount mode). + * This allows a single read-compare-cbranch-write sequence to test + * for both decrementer underflow and exceptions. + */ +typedef union IcountDecr { + uint32_t u32; + struct { #ifdef HOST_WORDS_BIGENDIAN -typedef struct icount_decr_u16 { - uint16_t high; - uint16_t low; -} icount_decr_u16; + uint16_t high; + uint16_t low; #else -typedef struct icount_decr_u16 { - uint16_t low; - uint16_t high; -} icount_decr_u16; + uint16_t low; + uint16_t high; #endif + } u16; +} IcountDecr; typedef struct CPUBreakpoint { vaddr pc; @@ -314,11 +322,6 @@ struct qemu_work_item; * @crash_occurred: Indicates the OS reported a crash (panic) for this CPU * @singlestep_enabled: Flags for single-stepping. * @icount_extra: Instructions until next timer event. - * @icount_decr: Low 16 bits: number of cycles left, only used in icount mode. - * High 16 bits: Set to -1 to force TCG to stop executing linked TBs for this - * CPU and return to its top level loop (even in non-icount mode). - * This allows a single read-compare-cbranch-write sequence to test - * for both decrementer underflow and exceptions. * @can_do_io: Nonzero if memory-mapped IO is safe. Deterministic execution * requires that IO only be performed on the last instruction of a TB * so that interrupts take effect immediately. @@ -328,6 +331,7 @@ struct qemu_work_item; * @as: Pointer to the first AddressSpace, for the convenience of targets which * only have a single AddressSpace * @env_ptr: Pointer to subclass-specific CPUArchState field. + * @icount_decr_ptr: Pointer to IcountDecr field within subclass. * @gdb_regs: Additional GDB registers. * @gdb_num_regs: Number of total registers accessible to GDB. * @gdb_num_g_regs: Number of registers in GDB 'g' packets. @@ -387,6 +391,7 @@ struct CPUState { MemoryRegion *memory; void *env_ptr; /* CPUArchState */ + IcountDecr *icount_decr_ptr; /* Accessed in parallel; all accesses must be atomic */ struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE]; @@ -441,15 +446,6 @@ struct CPUState { bool ignore_memory_transaction_failures; - /* Note that this is accessed at the start of every TB via a negative - offset from AREG0. Leave this field at the end so as to make the - (absolute value) offset as small as possible. This reduces code - size, especially for hosts without large memory offsets. */ - union { - uint32_t u32; - icount_decr_u16 u16; - } icount_decr; - struct hax_vcpu_state *hax_vcpu; int hvf_fd; |