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Message-Id: <20240819131924.372366-9-steven.price@arm.com>
Date: Mon, 19 Aug 2024 14:19:13 +0100
From: Steven Price <steven.price@....com>
To: kvm@...r.kernel.org,
kvmarm@...ts.linux.dev
Cc: Steven Price <steven.price@....com>,
Catalin Marinas <catalin.marinas@....com>,
Marc Zyngier <maz@...nel.org>,
Will Deacon <will@...nel.org>,
James Morse <james.morse@....com>,
Oliver Upton <oliver.upton@...ux.dev>,
Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Joey Gouly <joey.gouly@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
Christoffer Dall <christoffer.dall@....com>,
Fuad Tabba <tabba@...gle.com>,
linux-coco@...ts.linux.dev,
Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
Gavin Shan <gshan@...hat.com>,
Shanker Donthineni <sdonthineni@...dia.com>,
Alper Gun <alpergun@...gle.com>
Subject: [PATCH v5 08/19] fixmap: Allow architecture overriding set_fixmap_io
From: Suzuki K Poulose <suzuki.poulose@....com>
For a realm guest it will be necessary to ensure IO mappings are shared
so that the VMM can emulate the device. The following patch will provide
an implementation of set_fixmap_io for arm64 setting the shared bit (if
in a realm).
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
Signed-off-by: Steven Price <steven.price@....com>
---
New patch for v5
---
include/asm-generic/fixmap.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/asm-generic/fixmap.h b/include/asm-generic/fixmap.h
index 29cab7947980..9b75fe2bd8fd 100644
--- a/include/asm-generic/fixmap.h
+++ b/include/asm-generic/fixmap.h
@@ -94,8 +94,10 @@ static inline unsigned long virt_to_fix(const unsigned long vaddr)
/*
* Some fixmaps are for IO
*/
+#ifndef set_fixmap_io
#define set_fixmap_io(idx, phys) \
__set_fixmap(idx, phys, FIXMAP_PAGE_IO)
+#endif
#endif /* __ASSEMBLY__ */
#endif /* __ASM_GENERIC_FIXMAP_H */
--
2.34.1
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