On 5/9/23 3:47 PM, Elliot Berman wrote:
Add architecture-independent standard error codes, types, and macros for
Gunyah hypercalls.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Elliot Berman <quic_eberman@xxxxxxxxxxx>
Looks OK to me.
Reviewed-by: Alex Elder <elder@xxxxxxxxxx>
---
include/linux/gunyah.h | 83 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 include/linux/gunyah.h
diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
new file mode 100644
index 000000000000..a4e8ec91961d
--- /dev/null
+++ b/include/linux/gunyah.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _LINUX_GUNYAH_H
+#define _LINUX_GUNYAH_H
+
+#include <linux/errno.h>
+#include <linux/limits.h>
+
+/******************************************************************************/
+/* Common arch-independent definitions for Gunyah hypercalls */
+#define GH_CAPID_INVAL U64_MAX
+#define GH_VMID_ROOT_VM 0xff
+
+enum gh_error {
+ GH_ERROR_OK = 0,
+ GH_ERROR_UNIMPLEMENTED = -1,
+ GH_ERROR_RETRY = -2,
I know you explained it "should be OK" to use a negative
value (with unspecified bit width) here. I continue to
feel it's not well-enough specified for an external API,
but I'm going to try to just let it go.
+ GH_ERROR_ARG_INVAL = 1,
+ GH_ERROR_ARG_SIZE = 2,
+ GH_ERROR_ARG_ALIGN = 3,
+
+ GH_ERROR_NOMEM = 10,
+
+ GH_ERROR_ADDR_OVFL = 20,
+ GH_ERROR_ADDR_UNFL = 21,
+ GH_ERROR_ADDR_INVAL = 22,
+
+ GH_ERROR_DENIED = 30,
+ GH_ERROR_BUSY = 31,
+ GH_ERROR_IDLE = 32,
+
+ GH_ERROR_IRQ_BOUND = 40,
+ GH_ERROR_IRQ_UNBOUND = 41,
+
+ GH_ERROR_CSPACE_CAP_NULL = 50,
+ GH_ERROR_CSPACE_CAP_REVOKED = 51,
+ GH_ERROR_CSPACE_WRONG_OBJ_TYPE = 52,
+ GH_ERROR_CSPACE_INSUF_RIGHTS = 53,
+ GH_ERROR_CSPACE_FULL = 54,
+
+ GH_ERROR_MSGQUEUE_EMPTY = 60,
+ GH_ERROR_MSGQUEUE_FULL = 61,
+};
+
+/**
+ * gh_error_remap() - Remap Gunyah hypervisor errors into a Linux error code
+ * @gh_error: Gunyah hypercall return value
+ */
+static inline int gh_error_remap(enum gh_error gh_error)
+{
+ switch (gh_error) {
+ case GH_ERROR_OK:
+ return 0;
+ case GH_ERROR_NOMEM:
+ return -ENOMEM;
+ case GH_ERROR_DENIED:
+ case GH_ERROR_CSPACE_CAP_NULL:
+ case GH_ERROR_CSPACE_CAP_REVOKED:
+ case GH_ERROR_CSPACE_WRONG_OBJ_TYPE:
+ case GH_ERROR_CSPACE_INSUF_RIGHTS:
+ case GH_ERROR_CSPACE_FULL:
+ return -EACCES;
+ case GH_ERROR_BUSY:
+ case GH_ERROR_IDLE:
+ return -EBUSY;
+ case GH_ERROR_IRQ_BOUND:
+ case GH_ERROR_IRQ_UNBOUND:
+ case GH_ERROR_MSGQUEUE_FULL:
+ case GH_ERROR_MSGQUEUE_EMPTY:
+ return -EIO;
+ case GH_ERROR_UNIMPLEMENTED:
+ case GH_ERROR_RETRY:
+ return -EOPNOTSUPP;
+ default:
+ return -EINVAL;
+ }
+}
+
+#endif
