[PATCH v4 05/16] powerpc/pseries/svm: Add helpers for UV_SHARE_PAGE and UV_UNSHARE_PAGE
From: Thiago Jung Bauermann <hidden>
Date: 2019-08-20 02:14:11
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: Ram Pai <redacted> These functions are used when the guest wants to grant the hypervisor access to certain pages. Signed-off-by: Ram Pai <redacted> Signed-off-by: Thiago Jung Bauermann <redacted> --- arch/powerpc/include/asm/ultravisor-api.h | 2 ++ arch/powerpc/include/asm/ultravisor.h | 24 +++++++++++++++++++++++ 2 files changed, 26 insertions(+)
diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h
index d3503d1f447e..142b0576b89f 100644
--- a/arch/powerpc/include/asm/ultravisor-api.h
+++ b/arch/powerpc/include/asm/ultravisor-api.h@@ -22,5 +22,7 @@ /* opcodes */ #define UV_ESM 0xF110 +#define UV_SHARE_PAGE 0xF130 +#define UV_UNSHARE_PAGE 0xF134 #endif /* _ASM_POWERPC_ULTRAVISOR_API_H */
diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h
new file mode 100644
index 000000000000..a930aec8c1e3
--- /dev/null
+++ b/arch/powerpc/include/asm/ultravisor.h@@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Ultravisor definitions + * + * Copyright 2019, IBM Corporation. + * + */ +#ifndef _ASM_POWERPC_ULTRAVISOR_H +#define _ASM_POWERPC_ULTRAVISOR_H + +#include <asm/asm-prototypes.h> +#include <asm/ultravisor-api.h> + +static inline int uv_share_page(u64 pfn, u64 npages) +{ + return ucall_norets(UV_SHARE_PAGE, pfn, npages); +} + +static inline int uv_unshare_page(u64 pfn, u64 npages) +{ + return ucall_norets(UV_UNSHARE_PAGE, pfn, npages); +} + +#endif /* _ASM_POWERPC_ULTRAVISOR_H */