[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] x86/mem_sharing: add missing m2p entry when mapping shared_info page
commit 23eb39acf011ef9bbe02ed4619c55f208fbcd39b Author: Tamas K Lengyel <tamas@xxxxxxxxxxxxx> AuthorDate: Wed Oct 18 04:02:42 2023 -0400 Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> CommitDate: Tue Oct 31 16:10:14 2023 +0000 x86/mem_sharing: add missing m2p entry when mapping shared_info page When mapping in the shared_info page to a fork the m2p entry wasn't set resulting in the shared_info being reset even when the fork reset was called with only reset_state and not reset_memory. This results in an extra unnecessary TLB flush. Fixes: 1a0000ac775 ("mem_sharing: map shared_info page to same gfn during fork") Signed-off-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx> Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> --- xen/arch/x86/mm/mem_sharing.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index 94b6b782ef..142258f16a 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -1847,6 +1847,8 @@ static int copy_special_pages(struct domain *cd, struct domain *d) p2m_ram_rw, p2m->default_access, -1); if ( rc ) return rc; + + set_gpfn_from_mfn(mfn_x(new_mfn), gfn_x(old_gfn)); } } -- generated by git-patchbot for /home/xen/git/xen.git#master
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