RISC-V Confidential Virtualization Extension(COVE) specification defines
following 3 SBI extensions.
COVH (Host side interface)
COVG (Guest side interface)
COVI (Interrupt management interface)
Few acronyms introduced in this patch:
TSM - TEE Security Manager
TVM - TEE VM
This patch adds the definitions for COVH extension only.
Signed-off-by: Atish Patra <atishp@xxxxxxxxxxxx>
---
arch/riscv/include/asm/sbi.h | 61 ++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 62d00c7..c5a5526 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -32,6 +32,7 @@ enum sbi_ext_id {
SBI_EXT_PMU = 0x504D55,
SBI_EXT_DBCN = 0x4442434E,
SBI_EXT_NACL = 0x4E41434C,
+ SBI_EXT_COVH = 0x434F5648,
/* Experimentals extensions must lie within this range */
SBI_EXT_EXPERIMENTAL_START = 0x08000000,
@@ -348,6 +349,66 @@ enum sbi_ext_nacl_feature {
#define SBI_NACL_SHMEM_SRET_X(__i) ((__riscv_xlen / 8) * (__i))
#define SBI_NACL_SHMEM_SRET_X_LAST 31
+/* SBI COVH extension data structures */
+enum sbi_ext_covh_fid {
+ SBI_EXT_COVH_TSM_GET_INFO = 0,
+ SBI_EXT_COVH_TSM_CONVERT_PAGES,
+ SBI_EXT_COVH_TSM_RECLAIM_PAGES,
+ SBI_EXT_COVH_TSM_INITIATE_FENCE,
+ SBI_EXT_COVH_TSM_LOCAL_FENCE,
+ SBI_EXT_COVH_CREATE_TVM,
+ SBI_EXT_COVH_FINALIZE_TVM,
+ SBI_EXT_COVH_DESTROY_TVM,
+ SBI_EXT_COVH_TVM_ADD_MEMORY_REGION,
+ SBI_EXT_COVH_TVM_ADD_PGT_PAGES,
+ SBI_EXT_COVH_TVM_ADD_MEASURED_PAGES,
+ SBI_EXT_COVH_TVM_ADD_ZERO_PAGES,
+ SBI_EXT_COVH_TVM_ADD_SHARED_PAGES,
+ SBI_EXT_COVH_TVM_CREATE_VCPU,
+ SBI_EXT_COVH_TVM_VCPU_RUN,
+ SBI_EXT_COVH_TVM_INITIATE_FENCE,
+};
+
+enum sbi_cove_page_type {
+ SBI_COVE_PAGE_4K,
+ SBI_COVE_PAGE_2MB,
+ SBI_COVE_PAGE_1GB,
+ SBI_COVE_PAGE_512GB,
+};
+
+enum sbi_cove_tsm_state {
+ /* TSM has not been loaded yet */
+ TSM_NOT_LOADED,
+ /* TSM has been loaded but not initialized yet */
+ TSM_LOADED,
+ /* TSM has been initialized and ready to run */
+ TSM_READY,
+};
+
+struct sbi_cove_tsm_info {
+ /* Current state of the TSM */
+ enum sbi_cove_tsm_state tstate;
+
+ /* Version of the loaded TSM */
+ uint32_t version;
+
+ /* Number of 4K pages required per TVM */
+ unsigned long tvm_pages_needed;
+
+ /* Maximum VCPUs supported per TVM */
+ unsigned long tvm_max_vcpus;
+
+ /* Number of 4K pages each vcpu per TVM */
+ unsigned long tvcpu_pages_needed;
+};
+
+struct sbi_cove_tvm_create_params {
+ /* Root page directory for TVM's page table management */
+ unsigned long tvm_page_directory_addr;
+ /* Confidential memory address used to store TVM state information. Must be page aligned */
+ unsigned long tvm_state_addr;
+};
+
#define SBI_SPEC_VERSION_DEFAULT 0x1
#define SBI_SPEC_VERSION_MAJOR_SHIFT 24
#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
--
2.25.1
