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| author | Richard Henderson <rth@twiddle.net> | 2015-10-02 22:25:28 +0000 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2015-10-19 11:04:37 -1000 |
| commit | 5bfd75a35c11dd3aa61c73d0d2cd88137c31519c (patch) | |
| tree | 05f40158ebb5ab859bcd4c2b51f55df3225fc575 /translate-all.c | |
| parent | 70f897bdc4ce4101ec008317d43090f532bfb07d (diff) | |
| download | qemu-5bfd75a35c11dd3aa61c73d0d2cd88137c31519c.tar.gz qemu-5bfd75a35c11dd3aa61c73d0d2cd88137c31519c.tar.bz2 qemu-5bfd75a35c11dd3aa61c73d0d2cd88137c31519c.zip | |
tcg/ppc: Revise goto_tb implementation
Restrict the size of code_gen_buffer to 2GB on ppc64, which
lets us assert that everything is reachable with addis+addi
from tb_ret_addr. This lets us use a max of 4 insns for goto_tb
instead of 7.
Emit the indirect branch portion of goto_tb up front, which
means we only have to update two insns to update any link.
With a 64-bit store, we can update the link atomically, which
may be required in future.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'translate-all.c')
| -rw-r--r-- | translate-all.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/translate-all.c b/translate-all.c index 333eba4f5d..20ce40ec28 100644 --- a/translate-all.c +++ b/translate-all.c @@ -468,6 +468,8 @@ static inline PageDesc *page_find(tb_page_addr_t index) # define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) #elif defined(__sparc__) # define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) +#elif defined(__powerpc64__) +# define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024) #elif defined(__aarch64__) # define MAX_CODE_GEN_BUFFER_SIZE (128ul * 1024 * 1024) #elif defined(__arm__) |