Merge tag 'virtio-grants-v8-tag' of https://gitlab.com/sstabellini/qemu into staging

virtio-grants-v8

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# gpg: Signature made Wed 12 Jun 2024 02:25:34 PM PDT
# gpg:                using RSA key D04E33ABA51F67BA07D30AEA894F8F4870E1AE90
# gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>" [unknown]
# gpg:                 aka "Stefano Stabellini <sstabellini@kernel.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D04E 33AB A51F 67BA 07D3  0AEA 894F 8F48 70E1 AE90

* tag 'virtio-grants-v8-tag' of https://gitlab.com/sstabellini/qemu:
  hw/arm: xen: Enable use of grant mappings
  xen: mapcache: Add support for grant mappings
  xen: mapcache: Pass the ram_addr offset to xen_map_cache()
  xen: mapcache: Unmap first entries in buckets
  xen: mapcache: Make MCACHE_BUCKET_SHIFT runtime configurable

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

3 files changed, 6 insertions, 0 deletions

diff --git a/include/hw/xen/xen-hvm-common.h b/include/hw/xen/xen-hvm-common.h
index 65a51aa..3d79623 100644
--- a/include/hw/xen/xen-hvm-common.h
+++ b/include/hw/xen/xen-hvm-common.h
@@ -16,6 +16,7 @@
 #include <xen/hvm/ioreq.h>
 
 extern MemoryRegion xen_memory;
+extern MemoryRegion xen_grants;
 extern MemoryListener xen_io_listener;
 extern DeviceListener xen_device_listener;
 
@@ -29,6 +30,8 @@ extern DeviceListener xen_device_listener;
     do { } while (0)
 #endif
 
+#define XEN_GRANT_ADDR_OFF (1ULL << 63)
+
 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
 {
     return shared_page->vcpu_ioreq[i].vp_eport;
diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h
index 1ec9e66..b5e3ea1 100644
--- a/include/sysemu/xen-mapcache.h
+++ b/include/sysemu/xen-mapcache.h
@@ -19,6 +19,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset,
 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,
+                       ram_addr_t ram_addr_offset,
                        uint8_t lock, bool dma,
                        bool is_write);
 ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
@@ -37,6 +38,7 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
 static inline uint8_t *xen_map_cache(MemoryRegion *mr,
                                      hwaddr phys_addr,
                                      hwaddr size,
+                                     ram_addr_t ram_addr_offset,
                                      uint8_t lock,
                                      bool dma,
                                      bool is_write)
diff --git a/include/sysemu/xen.h b/include/sysemu/xen.h
index 3445888..d70eacf 100644
--- a/include/sysemu/xen.h
+++ b/include/sysemu/xen.h
@@ -50,4 +50,5 @@ static inline void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
 #endif /* CONFIG_XEN_IS_POSSIBLE */
 
 bool xen_mr_is_memory(MemoryRegion *mr);
+bool xen_mr_is_grants(MemoryRegion *mr);
 #endif