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Pull request linux-user 20220812

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Merge tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier/qemu into staging

Pull request linux-user 20220812

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# gpg: Signature made Fri 12 Aug 2022 03:33:41 AM PDT
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# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [undefined]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [undefined]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [undefined]
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# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier/qemu:
  linux-user/aarch64: Reset target data on MADV_DONTNEED

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-08-12 08:13:23 -07:00
commit 6add03bec0
3 changed files with 30 additions and 0 deletions
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26
accel/tcg/translate-all.c
View File

@ -2314,6 +2314,32 @@ void page_set_flags(target_ulong start, target_ulong end, int flags)
} }
} }
void page_reset_target_data(target_ulong start, target_ulong end)
{
target_ulong addr, len;
/*
* This function should never be called with addresses outside the
* guest address space. If this assert fires, it probably indicates
* a missing call to h2g_valid.
*/
assert(end - 1 <= GUEST_ADDR_MAX);
assert(start < end);
assert_memory_lock();
start = start & TARGET_PAGE_MASK;
end = TARGET_PAGE_ALIGN(end);
for (addr = start, len = end - start;
len != 0;
len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) {
PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
g_free(p->target_data);
p->target_data = NULL;
}
}
void *page_get_target_data(target_ulong address) void *page_get_target_data(target_ulong address)
{ {
PageDesc *p = page_find(address >> TARGET_PAGE_BITS); PageDesc *p = page_find(address >> TARGET_PAGE_BITS);

1
include/exec/cpu-all.h
View File

@ -271,6 +271,7 @@ int walk_memory_regions(void *, walk_memory_regions_fn);
int page_get_flags(target_ulong address); int page_get_flags(target_ulong address);
void page_set_flags(target_ulong start, target_ulong end, int flags); void page_set_flags(target_ulong start, target_ulong end, int flags);
void page_reset_target_data(target_ulong start, target_ulong end);
int page_check_range(target_ulong start, target_ulong len, int flags); int page_check_range(target_ulong start, target_ulong len, int flags);
/** /**

3
linux-user/mmap.c
View File

@ -894,6 +894,9 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice)
if (advice == MADV_DONTNEED && if (advice == MADV_DONTNEED &&
can_passthrough_madv_dontneed(start, end)) { can_passthrough_madv_dontneed(start, end)) {
ret = get_errno(madvise(g2h_untagged(start), len, MADV_DONTNEED)); ret = get_errno(madvise(g2h_untagged(start), len, MADV_DONTNEED));
if (ret == 0) {
page_reset_target_data(start, start + len);
}
} }
mmap_unlock(); mmap_unlock();