[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] xen/arm: optee: Allocate anonymous domheap pages
commit b75838ad6c4f42c93efee83fc2508c78641e1b57 Author: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx> AuthorDate: Mon Sep 6 16:42:21 2021 +0300 Commit: Julien Grall <jgrall@xxxxxxxxxx> CommitDate: Thu Oct 14 16:12:47 2021 +0000 xen/arm: optee: Allocate anonymous domheap pages Allocate anonymous domheap pages as there is no strict need to account them to a particular domain. Since XSA-383 "xen/arm: Restrict the amount of memory that dom0less domU and dom0 can allocate" the dom0 cannot allocate memory outside of the pre-allocated region. This means if we try to allocate non-anonymous page to be accounted to dom0 we will get an over-allocation issue when assigning that page to the domain. The anonymous page, in turn, is not assigned to any domain. CC: Julien Grall <jgrall@xxxxxxxxxx> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx> Acked-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx> Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx> Acked-by: Julien Grall <jgrall@xxxxxxxxxx> --- xen/arch/arm/tee/optee.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/xen/arch/arm/tee/optee.c b/xen/arch/arm/tee/optee.c index 131d2f9a8a..f49b3c0226 100644 --- a/xen/arch/arm/tee/optee.c +++ b/xen/arch/arm/tee/optee.c @@ -410,7 +410,7 @@ static struct shm_rpc *allocate_and_pin_shm_rpc(struct optee_domain *ctx, if ( !shm_rpc ) return ERR_PTR(-ENOMEM); - shm_rpc->xen_arg_pg = alloc_domheap_page(current->domain, 0); + shm_rpc->xen_arg_pg = alloc_domheap_page(NULL, 0); if ( !shm_rpc->xen_arg_pg ) { xfree(shm_rpc); @@ -774,7 +774,7 @@ static int translate_noncontig(struct optee_domain *ctx, * - There is a plan to implement preemption in the code below, which * will allow use to increase default MAX_SHM_BUFFER_PG value. */ - xen_pgs = alloc_domheap_pages(current->domain, order, 0); + xen_pgs = alloc_domheap_pages(NULL, order, 0); if ( !xen_pgs ) return -ENOMEM; @@ -942,7 +942,7 @@ static bool copy_std_request(struct cpu_user_regs *regs, BUILD_BUG_ON(OPTEE_MSG_NONCONTIG_PAGE_SIZE > PAGE_SIZE); - call->xen_arg_pg = alloc_domheap_page(current->domain, 0); + call->xen_arg_pg = alloc_domheap_page(NULL, 0); if ( !call->xen_arg_pg ) { set_user_reg(regs, 0, OPTEE_SMC_RETURN_ENOMEM); -- generated by git-patchbot for /home/xen/git/xen.git#staging
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