[Xen-devel] [PATCH v5 7/8] vpci: introduce a helper to check MMCFG ranges

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

The helpers returns whether a given memory address belongs to a domain
MMCFG range.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Changes since v4:
 - New in this version.
---
Cc: Paul Durrant <paul.durrant@xxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/io.c        | 5 +++++
 xen/include/asm-x86/hvm/io.h | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/xen/arch/x86/hvm/io.c b/xen/arch/x86/hvm/io.c
index bf4d8748d3..1f8fe36168 100644
--- a/xen/arch/x86/hvm/io.c
+++ b/xen/arch/x86/hvm/io.c
@@ -404,6 +404,11 @@ static const struct hvm_mmcfg *vpci_mmcfg_find(const 
struct domain *d,
     return NULL;
 }
 
+bool vpci_is_mmcfg_address(const struct domain *d, paddr_t addr)
+{
+    return vpci_mmcfg_find(d, addr);
+}
+
 static unsigned int vpci_mmcfg_decode_addr(const struct hvm_mmcfg *mmcfg,
                                            paddr_t addr, pci_sbdf_t *sbdf)
 {
diff --git a/xen/include/asm-x86/hvm/io.h b/xen/include/asm-x86/hvm/io.h
index e6b6ed0b92..83431b44f2 100644
--- a/xen/include/asm-x86/hvm/io.h
+++ b/xen/include/asm-x86/hvm/io.h
@@ -180,6 +180,9 @@ int register_vpci_mmcfg_handler(struct domain *d, paddr_t 
addr,
 /* Destroy tracked MMCFG areas. */
 void destroy_vpci_mmcfg(struct domain *d);
 
+/* Check if an address is between a MMCFG region for a domain. */
+bool vpci_is_mmcfg_address(const struct domain *d, paddr_t addr);
+
 #endif /* __ASM_X86_HVM_IO_H__ */
 
 
-- 
2.18.0


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