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| author | Richard Henderson <richard.henderson@linaro.org> | 2024-01-02 12:57:40 +1100 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2024-02-29 11:35:36 -1000 |
| commit | d1fc62303e1447c516bf6c1fa1c6331715a88180 (patch) | |
| tree | 3b6f3e4c8f784a1dfbeb0daa2d018792ab962803 /linux-user/elfload.c | |
| parent | d17b684c10e1707d535b9dfa685df610834ec210 (diff) | |
| download | qemu-d1fc62303e1447c516bf6c1fa1c6331715a88180.zip qemu-d1fc62303e1447c516bf6c1fa1c6331715a88180.tar.gz qemu-d1fc62303e1447c516bf6c1fa1c6331715a88180.tar.bz2 | |
linux-user/hppa: Simplify init_guest_commpage
If reserved_va, then we have already reserved the entire
guest virtual address space; no need to remap page.
If !reserved_va, then use MAP_FIXED_NOREPLACE.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-6-richard.henderson@linaro.org>
Diffstat (limited to 'linux-user/elfload.c')
| -rw-r--r-- | linux-user/elfload.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 0f135f6..53b61aa 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1970,16 +1970,20 @@ static inline void init_thread(struct target_pt_regs *regs, static bool init_guest_commpage(void) { - void *want = g2h_untagged(LO_COMMPAGE); - void *addr = mmap(want, qemu_host_page_size, PROT_NONE, - MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0); - - if (addr == MAP_FAILED) { - perror("Allocating guest commpage"); - exit(EXIT_FAILURE); - } - if (addr != want) { - return false; + /* If reserved_va, then we have already mapped 0 page on the host. */ + if (!reserved_va) { + void *want, *addr; + + want = g2h_untagged(LO_COMMPAGE); + addr = mmap(want, TARGET_PAGE_SIZE, PROT_NONE, + MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED_NOREPLACE, -1, 0); + if (addr == MAP_FAILED) { + perror("Allocating guest commpage"); + exit(EXIT_FAILURE); + } + if (addr != want) { + return false; + } } /* |