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Iglesias" To: qemu-devel@nongnu.org, Stefano Stabellini , Anthony PERARD , Paul Durrant , "Edgar E. Iglesias" Cc: edgar.iglesias@amd.com, xen-devel@lists.xenproject.org Subject: [PATCH v1 2/5] xen: mapcache: Add function to check if the mapcache is enabled Date: Wed, 4 Mar 2026 02:52:18 +0100 Message-ID: <20260304015222.979224-3-edgar.iglesias@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260304015222.979224-1-edgar.iglesias@gmail.com> References: <20260304015222.979224-1-edgar.iglesias@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1772589179930139100 Content-Type: text/plain; charset="utf-8" From: "Edgar E. Iglesias" Add function to check if the mapcache is enabled. No functional change. Signed-off-by: Edgar E. Iglesias Reviewed-by: Stefano Stabellini --- hw/xen/xen-mapcache.c | 6 ++++++ hw/xen/xen_stubs.c | 5 +++++ include/system/xen-mapcache.h | 1 + 3 files changed, 12 insertions(+) diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c index 517e5171b7..a3c162cd4c 100644 --- a/hw/xen/xen-mapcache.c +++ b/hw/xen/xen-mapcache.c @@ -80,6 +80,12 @@ static MapCache *mapcache_grants_ro; static MapCache *mapcache_grants_rw; static xengnttab_handle *xen_region_gnttabdev; =20 +bool xen_map_cache_enabled(void) +{ + /* Map cache enabled implies xen_enabled(). */ + return xen_enabled() && mapcache; +} + static inline void mapcache_lock(MapCache *mc) { qemu_mutex_lock(&mc->lock); diff --git a/hw/xen/xen_stubs.c b/hw/xen/xen_stubs.c index 5e565df392..a39efb5062 100644 --- a/hw/xen/xen_stubs.c +++ b/hw/xen/xen_stubs.c @@ -29,6 +29,11 @@ bool xen_mr_is_memory(MemoryRegion *mr) g_assert_not_reached(); } =20 +bool xen_map_cache_enabled(void) +{ + return false; +} + void xen_invalidate_map_cache_entry(uint8_t *buffer) { g_assert_not_reached(); diff --git a/include/system/xen-mapcache.h b/include/system/xen-mapcache.h index fa2cff38d1..c46190dd0c 100644 --- a/include/system/xen-mapcache.h +++ b/include/system/xen-mapcache.h @@ -13,6 +13,7 @@ =20 typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset, ram_addr_t size); +bool xen_map_cache_enabled(void); void xen_map_cache_init(phys_offset_to_gaddr_t f, void *opaque); uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size, --=20 2.43.0