From a40ec84ee2b02086e27fab78a152c20b09c723cf Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 22 Mar 2019 13:52:09 -0700 Subject: tcg: Create struct CPUTLB Move all softmmu tlb data into this structure. Arrange the members so that we are able to place mask+table together and at a smaller absolute offset from ENV. Reviewed-by: Peter Maydell Acked-by: Alistair Francis Signed-off-by: Richard Henderson --- include/exec/cpu-defs.h | 59 ++++++++++++++++++++++++++++--------------------- 1 file changed, 34 insertions(+), 25 deletions(-) (limited to 'include/exec/cpu-defs.h') diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h index 2694481..b9ec261 100644 --- a/include/exec/cpu-defs.h +++ b/include/exec/cpu-defs.h @@ -78,6 +78,7 @@ typedef uint64_t target_ulong; #endif #if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG) + /* use a fully associative victim tlb of 8 entries */ #define CPU_VTLB_SIZE 8 @@ -147,6 +148,10 @@ typedef struct CPUIOTLBEntry { MemTxAttrs attrs; } CPUIOTLBEntry; +/* + * Data elements that are per MMU mode, minus the bits accessed by + * the TCG fast path. + */ typedef struct CPUTLBDesc { /* * Describe a region covering all of the large pages allocated @@ -160,16 +165,31 @@ typedef struct CPUTLBDesc { int64_t window_begin_ns; /* maximum number of entries observed in the window */ size_t window_max_entries; + size_t n_used_entries; /* The next index to use in the tlb victim table. */ size_t vindex; - size_t n_used_entries; + /* The tlb victim table, in two parts. */ + CPUTLBEntry vtable[CPU_VTLB_SIZE]; + CPUIOTLBEntry viotlb[CPU_VTLB_SIZE]; + /* The iotlb. */ + CPUIOTLBEntry *iotlb; } CPUTLBDesc; /* + * Data elements that are per MMU mode, accessed by the fast path. + */ +typedef struct CPUTLBDescFast { + /* Contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */ + uintptr_t mask; + /* The array of tlb entries itself. */ + CPUTLBEntry *table; +} CPUTLBDescFast; + +/* * Data elements that are shared between all MMU modes. */ typedef struct CPUTLBCommon { - /* Serialize updates to tlb_table and tlb_v_table, and others as noted. */ + /* Serialize updates to f.table and d.vtable, and others as noted. */ QemuSpin lock; /* * Within dirty, for each bit N, modifications have been made to @@ -187,35 +207,24 @@ typedef struct CPUTLBCommon { size_t elide_flush_count; } CPUTLBCommon; -# define CPU_TLB \ - /* tlb_mask[i] contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */ \ - uintptr_t tlb_mask[NB_MMU_MODES]; \ - CPUTLBEntry *tlb_table[NB_MMU_MODES]; -# define CPU_IOTLB \ - CPUIOTLBEntry *iotlb[NB_MMU_MODES]; - /* + * The entire softmmu tlb, for all MMU modes. * The meaning of each of the MMU modes is defined in the target code. - * Note that NB_MMU_MODES is not yet defined; we can only reference it - * within preprocessor defines that will be expanded later. */ -#define CPU_COMMON_TLB \ - CPUTLBCommon tlb_c; \ - CPUTLBDesc tlb_d[NB_MMU_MODES]; \ - CPU_TLB \ - CPUTLBEntry tlb_v_table[NB_MMU_MODES][CPU_VTLB_SIZE]; \ - CPU_IOTLB \ - CPUIOTLBEntry iotlb_v[NB_MMU_MODES][CPU_VTLB_SIZE]; - -#else +typedef struct CPUTLB { + CPUTLBDescFast f[NB_MMU_MODES]; + CPUTLBDesc d[NB_MMU_MODES]; + CPUTLBCommon c; +} CPUTLB; -#define CPU_COMMON_TLB +/* There are target-specific members named "tlb". This is temporary. */ +#define CPU_COMMON CPUTLB tlb_; +#define env_tlb(ENV) (&(ENV)->tlb_) -#endif +#else +#define CPU_COMMON /* Nothing */ -#define CPU_COMMON \ - /* soft mmu support */ \ - CPU_COMMON_TLB \ +#endif /* !CONFIG_USER_ONLY && CONFIG_TCG */ #endif -- cgit v1.1