From d9c5858570a57f374b71216c5da39ee381fa92f5 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 12 Feb 2021 10:48:32 -0800 Subject: 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 Signed-off-by: Richard Henderson Message-id: 20210212184902.1251044-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- linux-user/mmap.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'linux-user/mmap.c') diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 1c9faef476..ac0624f31a 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(); -- cgit 1.4.1