From: Rajnesh Kanwal <rkanwal@xxxxxxxxxxxx>
All the confidential computing solutions uses the arch specific
cc_platform_has function to enable memory encryption/decryption.
Implement the same for RISC-V to support that as well.
Signed-off-by: Rajnesh Kanwal <rkanwal@xxxxxxxxxxxx>
Signed-off-by: Atish Patra <atishp@xxxxxxxxxxxx>
---
arch/riscv/Kconfig | 1 +
arch/riscv/cove/core.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 414cee1..2ca9e01 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -522,6 +522,7 @@ config RISCV_COVE_GUEST
default n
select SWIOTLB
select RISCV_MEM_ENCRYPT
+ select ARCH_HAS_CC_PLATFORM
help
Enables support for running TVMs on platforms supporting CoVE.
diff --git a/arch/riscv/cove/core.c b/arch/riscv/cove/core.c
index 7218fe7..582feb1c 100644
--- a/arch/riscv/cove/core.c
+++ b/arch/riscv/cove/core.c
@@ -21,6 +21,18 @@ bool is_cove_guest(void)
}
EXPORT_SYMBOL_GPL(is_cove_guest);
+bool cc_platform_has(enum cc_attr attr)
+{
+ switch (attr) {
+ case CC_ATTR_GUEST_MEM_ENCRYPT:
+ case CC_ATTR_MEM_ENCRYPT:
+ return is_cove_guest();
+ default:
+ return false;
+ }
+}
+EXPORT_SYMBOL_GPL(cc_platform_has);
+
void riscv_cove_sbi_init(void)
{
if (sbi_probe_extension(SBI_EXT_COVG) > 0)
--
2.25.1
