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authorRichard Henderson <richard.henderson@linaro.org>2021-02-12 10:48:32 -0800
committerPeter Maydell <peter.maydell@linaro.org>2021-02-16 11:04:52 +0000
commitd9c5858570a57f374b71216c5da39ee381fa92f5 (patch)
tree993ffb46c24da50b9b88ab1269a889ab994ccd58 /linux-user
parent8ba4bca570ace1e60614a0808631a517cf5df67a (diff)
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tcg: Introduce target-specific page data for user-only
This data can be allocated by page_alloc_target_data() and released by page_set_flags(start, end, prot | PAGE_RESET). This data will be used to hold tag memory for AArch64 MTE. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210212184902.1251044-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/mmap.c4
-rw-r--r--linux-user/syscall.c4
2 files changed, 5 insertions, 3 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 1c9faef..ac0624f 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -599,6 +599,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int target_prot,
}
}
the_end1:
+ page_flags |= PAGE_RESET;
page_set_flags(start, start + len, page_flags);
the_end:
trace_target_mmap_complete(start);
@@ -794,7 +795,8 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
new_addr = h2g(host_addr);
prot = page_get_flags(old_addr);
page_set_flags(old_addr, old_addr + old_size, 0);
- page_set_flags(new_addr, new_addr + new_size, prot | PAGE_VALID);
+ page_set_flags(new_addr, new_addr + new_size,
+ prot | PAGE_VALID | PAGE_RESET);
}
tb_invalidate_phys_range(new_addr, new_addr + new_size);
mmap_unlock();
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 36b0901..0c2d660 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4643,8 +4643,8 @@ static inline abi_ulong do_shmat(CPUArchState *cpu_env,
raddr=h2g((unsigned long)host_raddr);
page_set_flags(raddr, raddr + shm_info.shm_segsz,
- PAGE_VALID | PAGE_READ |
- ((shmflg & SHM_RDONLY)? 0 : PAGE_WRITE));
+ PAGE_VALID | PAGE_RESET | PAGE_READ |
+ (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
for (i = 0; i < N_SHM_REGIONS; i++) {
if (!shm_regions[i].in_use) {