[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] xen/arm: mm: Allow xen_pt_update() to work with the current root table
commit 0e506697d016ceab58b06a5c6e1932b9b382e29e Author: Julien Grall <jgrall@xxxxxxxxxx> AuthorDate: Thu Dec 15 11:44:54 2022 +0000 Commit: Julien Grall <jgrall@xxxxxxxxxx> CommitDate: Thu Dec 15 11:46:37 2022 +0000 xen/arm: mm: Allow xen_pt_update() to work with the current root table At the moment, xen_pt_update() will only work on the runtime page tables. In follow-up patches, we will also want to use the helper to update the boot page tables. All the existing callers of xen_pt_update() expects to modify the current page-tables. Therefore, we can read the root physical address directly from TTBR0_EL2. Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx> Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx> --- xen/arch/arm/mm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index 1fd207b27c..16ec1d0fe9 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -1099,7 +1099,7 @@ static int xen_pt_update(unsigned long virt, * * XXX: Add a check. */ - const mfn_t root = virt_to_mfn(THIS_CPU_PGTABLE); + const mfn_t root = maddr_to_mfn(READ_SYSREG64(TTBR0_EL2)); /* * The hardware was configured to forbid mapping both writeable and -- generated by git-patchbot for /home/xen/git/xen.git#master
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