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3487 Commits
Author SHA1 Message Date
Ilya LeoshkevichandAlex Bennée d4e1369abe {linux,bsd}-user: Update ts_tid after fork() 
Currently ts_tid contains the parent tid after fork(), which is not
correct. So far it has not affected anything, but the upcoming
follow-fork-mode child support relies on the correct value, so fix it.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Message-Id: <20240219141628.246823-4-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-5-alex.bennee@linaro.org>
 2024-03-06 12:35:19 +00:00
Ilya LeoshkevichandAlex Bennée e4e5cb4a54 {linux,bsd}-user: Introduce get_task_state() 
A CPU's TaskState is stored in the CPUState's void *opaque field,
accessing which is somewhat awkward due to having to use a cast.
Introduce a wrapper and use it everywhere.

Suggested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240219141628.246823-3-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-4-alex.bennee@linaro.org>
 2024-03-06 12:35:19 +00:00
Richard Henderson 78bc8ed9a8 linux-user: Rewrite target_shmat 
Handle combined host and guest alignment requirements.
Handle host and guest page size differences.
Handle SHM_EXEC.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/115
Tested-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-03-01 08:09:55 -10:00
Richard Henderson 9f7c97324c linux-user: Add strace for shmat 
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-03-01 08:05:59 -10:00
Richard Henderson 01a721167a linux-user/loongarch64: Remove TARGET_FORCE_SHMLBA 
The kernel abi was changed with

    commit d23b77953f5a4fbf94c05157b186aac2a247ae32
    Author: Huacai Chen <chenhuacai@kernel.org>
    Date:   Wed Jan 17 12:43:08 2024 +0800

        LoongArch: Change SHMLBA from SZ_64K to PAGE_SIZE

during the v6.8 cycle.

Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-02-29 14:24:30 -10:00
Richard Henderson 4ef1f559f2 linux-user/x86_64: Handle the vsyscall page in open_self_maps_{2,4} 
This is the only case in which we expect to have no host memory backing
for a guest memory page, because in general linux user processes cannot
map any pages in the top half of the 64-bit address space.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2170
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-02-29 14:24:24 -10:00
Richard Henderson b816e1b5ba linux-user: Remove pgb_dynamic alignment assertion 
The assertion was never correct, because the alignment is a composite
of the image alignment and SHMLBA.  Even if the image alignment didn't
match the image address, an assertion would not be correct -- more
appropriate would be an error message about an ill formed image.  But
the image cannot be held to SHMLBA under any circumstances.

Fixes: ee94743034 ("linux-user: completely re-write init_guest_space")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2157
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reported-by: Alexey Sheplyakov <asheplyakov@yandex.ru>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson 78b79b2cb3 linux-user: Bound mmap_min_addr by host page size 
Bizzarely, it is possible to set /proc/sys/vm/mmap_min_addr
to a value below the host page size.  Fix that.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-32-richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson ff8a8bbc2a linux-user: Allow TARGET_PAGE_BITS_VARY 
If set, match the host and guest page sizes.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-30-richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson 01e449809b *-user: Deprecate and disable -p pagesize 
This option controls the host page size.  From the mis-usage in
our own testsuite, this is easily confused with guest page size.

The only thing that occurs when changing the host page size is
that stuff breaks, because one cannot actually change the host
page size.  Therefore reject all but the no-op setting as part
of the deprecation process.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-27-richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson eb5027ac61 linux-user: Split out mmap_h_gt_g 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-24-richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson 8080b2f804 linux-user: Split out mmap_h_lt_g 
Work much harder to get alignment and mapping beyond the end
of the file correct.  Both of which are excercised by our
test-mmap for alpha (8k pages) on any 4k page host.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-23-richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson 68098de90e linux-user: Split out mmap_h_eq_g 
Move the MAX_FIXED_NOREPLACE check for reserved_va earlier.
Move the computation of host_prot earlier.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-22-richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson 3bfa271e46 linux-user: Use do_munmap for target_mmap failure 
For the cases for which the host mmap succeeds, but does
not yield the desired address, use do_munmap to restore
the reserved_va memory reservation.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson 2952b642a5 linux-user: Split out do_munmap 
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-02-29 11:35:37 -10:00
Richard Henderson ad87d26e6b linux-user: Do early mmap placement only for reserved_va 
For reserved_va, place all non-fixed maps then proceed
as for MAP_FIXED.

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: <20240102015808.132373-21-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson 6ecc25570f linux-user: Split out mmap_end 
Use a subroutine instead of a goto within target_mmap__locked.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-20-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson f0a362c476 linux-user: Fix sub-host-page mmap 
We cannot skip over the_end1 to the_end, because we fail to
record the validity of the guest page with the interval tree.
Remove "the_end" and rename "the_end1" to "the_end".

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: <20240102015808.132373-19-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson e8cec51be0 linux-user: Move some mmap checks outside the lock 
Basic validation of operands does not require the lock.
Hoist them from target_mmap__locked back into target_mmap.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-18-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson d558c395a9 linux-user: Split out target_mmap__locked 
All "goto fail" may be transformed to "return -1".

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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: <20240102015808.132373-17-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson 13c1339755 linux-user: Remove qemu_host_page_size from main 
Use qemu_real_host_page_size() instead.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-16-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson b36b2b1d3d linux-user: Remove HOST_PAGE_ALIGN from mmap.c 
This removes a hidden use of qemu_host_page_size, using instead
the existing host_page_size local within each function.

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: <20240102015808.132373-11-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson e56922abf0 linux-user: Remove REAL_HOST_PAGE_ALIGN from mmap.c 
We already have qemu_real_host_page_size() in a local variable.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-10-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson 621ac47d37 linux-user: Remove qemu_host_page_{size, mask} from mmap.c 
Use qemu_real_host_page_size instead.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-9-richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00
Richard Henderson 2c796d230e linux-user: Remove qemu_host_page_size from elf_core_dump 
Used only once in wmr_page_unprotect_regions.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2024-02-29 11:35:36 -10:00