From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
This function is for declaring memory that should be shared with
a hypervisor in a confidential guest. If the architecture doesn't
implement it it's just ioremap.
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
---
arch/alpha/include/asm/io.h | 1 +
arch/mips/include/asm/io.h | 1 +
arch/parisc/include/asm/io.h | 1 +
arch/sparc/include/asm/io_64.h | 1 +
include/asm-generic/io.h | 4 ++++
5 files changed, 8 insertions(+)
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index 0fab5ac90775..701b44909b94 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -283,6 +283,7 @@ static inline void __iomem *ioremap(unsigned long port, unsigned long size)
}
#define ioremap_wc ioremap
+#define ioremap_shared ioremap
#define ioremap_uc ioremap
static inline void iounmap(volatile void __iomem *addr)
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index 6f5c86d2bab4..3713ff624632 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -179,6 +179,7 @@ void iounmap(const volatile void __iomem *addr);
#define ioremap(offset, size) \
ioremap_prot((offset), (size), _CACHE_UNCACHED)
#define ioremap_uc ioremap
+#define ioremap_shared ioremap
/*
* ioremap_cache - map bus memory into CPU space
diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h
index 0b5259102319..73064e152df7 100644
--- a/arch/parisc/include/asm/io.h
+++ b/arch/parisc/include/asm/io.h
@@ -129,6 +129,7 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr)
*/
void __iomem *ioremap(unsigned long offset, unsigned long size);
#define ioremap_wc ioremap
+#define ioremap_shared ioremap
#define ioremap_uc ioremap
extern void iounmap(const volatile void __iomem *addr);
diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h
index 5ffa820dcd4d..18cc656eb712 100644
--- a/arch/sparc/include/asm/io_64.h
+++ b/arch/sparc/include/asm/io_64.h
@@ -409,6 +409,7 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
#define ioremap_uc(X,Y) ioremap((X),(Y))
#define ioremap_wc(X,Y) ioremap((X),(Y))
#define ioremap_wt(X,Y) ioremap((X),(Y))
+#define ioremap_shared(X, Y) ioremap((X), (Y))
static inline void __iomem *ioremap_np(unsigned long offset, unsigned long size)
{
return NULL;
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index e93375c710b9..bfcaee1691c8 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -982,6 +982,10 @@ static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
#define ioremap_wt ioremap
#endif
+#ifndef ioremap_shared
+#define ioremap_shared ioremap
+#endif
+
/*
* ioremap_uc is special in that we do require an explicit architecture
* implementation. In general you do not want to use this function in a
--
2.25.1
