From 9ecdd4bf08dfe4a37e16b8a8b228575aff641468 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Tue, 30 Apr 2024 10:26:45 +0200 Subject: xen: mapcache: Add support for grant mappings Add a second mapcache for grant mappings. The mapcache for grants needs to work with XC_PAGE_SIZE granularity since we can't map larger ranges than what has been granted to us. Like with foreign mappings (xen_memory), machines using grants are expected to initialize the xen_grants MR and map it into their address-map accordingly. CC: Manos Pitsidianakis Signed-off-by: Edgar E. Iglesias Reviewed-by: Stefano Stabellini --- hw/xen/xen-hvm-common.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'hw/xen/xen-hvm-common.c') diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c index a0a0252da0..b8ace1c368 100644 --- a/hw/xen/xen-hvm-common.c +++ b/hw/xen/xen-hvm-common.c @@ -10,12 +10,18 @@ #include "hw/boards.h" #include "hw/xen/arch_hvm.h" -MemoryRegion xen_memory; +MemoryRegion xen_memory, xen_grants; -/* Check for xen memory. */ +/* Check for any kind of xen memory, foreign mappings or grants. */ bool xen_mr_is_memory(MemoryRegion *mr) { - return mr == &xen_memory; + return mr == &xen_memory || mr == &xen_grants; +} + +/* Check specifically for grants. */ +bool xen_mr_is_grants(MemoryRegion *mr) +{ + return mr == &xen_grants; } void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr, -- cgit 1.4.1