[RFC kvm-unit-tests 23/27] arm: realm: add RSI interface for attestation measurements

Joey Gouly
2023-01-27T11:49:24Z

From: Suzuki K Poulose <suzuki.poulose@arm.com>

Add wrappers for the Attestation and measurement related RSI calls.
These will be later used in the test cases

Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
---
lib/arm64/asm/rsi.h | 7 +++++++
lib/arm64/rsi.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+)

diff --git a/lib/arm64/asm/rsi.h b/lib/arm64/asm/rsi.h
index c8179341..50bab993 100644
--- a/lib/arm64/asm/rsi.h
+++ b/lib/arm64/asm/rsi.h
@@ -27,6 +27,13 @@ int rsi_invoke(unsigned int function_id, unsigned long arg0,
struct smccc_result *result);

int rsi_get_version(void);
+void rsi_attest_token_init(phys_addr_t addr, unsigned long *challenge,
+ struct smccc_result *res);
+void rsi_attest_token_continue(phys_addr_t addr, struct smccc_result *res);
+void rsi_extend_measurement(unsigned int index, unsigned long size,
+ unsigned long *measurement,
+ struct smccc_result *res);
+void rsi_read_measurement(unsigned int index, struct smccc_result *res);

static inline bool is_realm(void)
{
diff --git a/lib/arm64/rsi.c b/lib/arm64/rsi.c
index 08c77889..63d0620a 100644
--- a/lib/arm64/rsi.c
+++ b/lib/arm64/rsi.c
@@ -66,6 +66,38 @@ void arm_rsi_init(void)
prot_ns_shared = (1UL << phys_mask_shift);
}

+void rsi_attest_token_init(phys_addr_t addr, unsigned long *challenge,
+ struct smccc_result *res)
+{
+ rsi_invoke(SMC_RSI_ATTEST_TOKEN_INIT, addr,
+ challenge[0], challenge[1], challenge[2],
+ challenge[3], challenge[4], challenge[5],
+ challenge[6], challenge[7], 0, 0, res);
+}
+
+void rsi_attest_token_continue(phys_addr_t addr, struct smccc_result *res)
+{
+ rsi_invoke(SMC_RSI_ATTEST_TOKEN_CONTINUE, addr,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, res);
+}
+
+void rsi_extend_measurement(unsigned int index, unsigned long size,
+ unsigned long *measurement, struct smccc_result *res)
+{
+ rsi_invoke(SMC_RSI_MEASUREMENT_EXTEND, index, size,
+ measurement[0], measurement[1],
+ measurement[2], measurement[3],
+ measurement[4], measurement[5],
+ measurement[6], measurement[7],
+ 0, res);
+}
+
+void rsi_read_measurement(unsigned int index, struct smccc_result *res)
+{
+ rsi_invoke(SMC_RSI_MEASUREMENT_READ, index, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, res);
+}
+
static unsigned rsi_set_addr_range_state(unsigned long start, unsigned long size,
enum ripas_t state, unsigned long *top)
{
--
2.17.1