diff options
| author | Sergey Sorokin <afarallax@yandex.ru> | 2016-06-23 21:16:46 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-07-05 20:50:13 -0700 |
| commit | 1f00b27f17518a1bcb4cedca49eaec96a4d560bd (patch) | |
| tree | 90abe3fc60c60ce9ff0aa5c46a87c5589ff55229 /include/exec | |
| parent | 59d7c14eeff8d2ad7f61aed86ce5a176113bc153 (diff) | |
tcg: Improve the alignment check infrastructure
Some architectures (e.g. ARMv8) need the address which is aligned
to a size more than the size of the memory access.
To support such check it's enough the current costless alignment
check implementation in QEMU, but we need to support
an alignment size specifying.
Signed-off-by: Sergey Sorokin <afarallax@yandex.ru>
Message-Id: <1466705806-679898-1-git-send-email-afarallax@yandex.ru>
Signed-off-by: Richard Henderson <rth@twiddle.net>
[rth: Assert in tcg_canonicalize_memop. Leave get_alignment_bits
available for, though unused by, user-mode. Retain logging difference
based on ALIGNED_ONLY.]
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/cpu-all.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 6a6796d0c9..b6a705982f 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -288,14 +288,22 @@ CPUArchState *cpu_copy(CPUArchState *env); #if !defined(CONFIG_USER_ONLY) /* Flags stored in the low bits of the TLB virtual address. These are - defined so that fast path ram access is all zeros. */ + * defined so that fast path ram access is all zeros. + * The flags all must be between TARGET_PAGE_BITS and + * maximum address alignment bit. + */ /* Zero if TLB entry is valid. */ -#define TLB_INVALID_MASK (1 << 3) +#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS - 1)) /* Set if TLB entry references a clean RAM page. The iotlb entry will contain the page physical address. */ -#define TLB_NOTDIRTY (1 << 4) +#define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS - 2)) /* Set if TLB entry is an IO callback. */ -#define TLB_MMIO (1 << 5) +#define TLB_MMIO (1 << (TARGET_PAGE_BITS - 3)) + +/* Use this mask to check interception with an alignment mask + * in a TCG backend. + */ +#define TLB_FLAGS_MASK (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO) void dump_exec_info(FILE *f, fprintf_function cpu_fprintf); void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf); |