firmware: scm: Add new SCM call API for switching memory ownership
Two different processors on a SOC need to switch memory ownership
during load/unload. To enable this, second level memory map table
need to be updated, which is done by secure layer.
This patch adds the interface for making secure monitor call for
memory ownership switching request.
Acked-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
[bjorn: Minor style and kerneldoc updates]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index e538047..6f8da9e 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -23,6 +23,19 @@
u32 val;
};
+struct qcom_scm_vmperm {
+ int vmid;
+ int perm;
+};
+
+#define QCOM_SCM_VMID_HLOS 0x3
+#define QCOM_SCM_VMID_MSS_MSA 0xF
+#define QCOM_SCM_PERM_READ 0x4
+#define QCOM_SCM_PERM_WRITE 0x2
+#define QCOM_SCM_PERM_EXEC 0x1
+#define QCOM_SCM_PERM_RW (QCOM_SCM_PERM_READ | QCOM_SCM_PERM_WRITE)
+#define QCOM_SCM_PERM_RWX (QCOM_SCM_PERM_RW | QCOM_SCM_PERM_EXEC)
+
#if IS_ENABLED(CONFIG_QCOM_SCM)
extern int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
extern int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus);
@@ -37,6 +50,9 @@
phys_addr_t size);
extern int qcom_scm_pas_auth_and_reset(u32 peripheral);
extern int qcom_scm_pas_shutdown(u32 peripheral);
+extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
+ unsigned int *src, struct qcom_scm_vmperm *newvm,
+ int dest_cnt);
extern void qcom_scm_cpu_power_down(u32 flags);
extern u32 qcom_scm_get_version(void);
extern int qcom_scm_set_remote_state(u32 state, u32 id);