[kvm-unit-tests PATCH 4/8] s390x: uv: Add more UV call functions

Janosch Frank
2021-11-23T10:40:17Z

To manage protected guests we need a few more UV calls:
* import / export
* destroy page
* set SE header
* set cpu state

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
lib/s390x/asm/uv.h | 85 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)

diff --git a/lib/s390x/asm/uv.h b/lib/s390x/asm/uv.h
index 8baf896f..6e331211 100644
--- a/lib/s390x/asm/uv.h
+++ b/lib/s390x/asm/uv.h
@@ -33,6 +33,7 @@
#define UVC_CMD_DESTROY_SEC_CPU 0x0121
#define UVC_CMD_CONV_TO_SEC_STOR 0x0200
#define UVC_CMD_CONV_FROM_SEC_STOR 0x0201
+#define UVC_CMD_DESTR_SEC_STOR 0x0202
#define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
#define UVC_CMD_UNPACK_IMG 0x0301
#define UVC_CMD_VERIFY_IMG 0x0302
@@ -256,6 +257,63 @@ static inline int uv_remove_shared(unsigned long addr)
return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS);
}

+static inline int uv_cmd_nodata(uint64_t handle, uint16_t cmd, uint16_t *rc, uint16_t *rrc)
+{
+ struct uv_cb_nodata uvcb = {
+ .header.cmd = cmd,
+ .header.len = sizeof(uvcb),
+ .handle = handle,
+ };
+ int cc;
+
+ assert(handle);
+ cc = uv_call(0, (uint64_t)&uvcb);
+ *rc = uvcb.header.rc;
+ *rrc = uvcb.header.rrc;
+ return cc;
+}
+
+static inline int uv_import(uint64_t handle, unsigned long gaddr)
+{
+ struct uv_cb_cts uvcb = {
+ .header.cmd = UVC_CMD_CONV_TO_SEC_STOR,
+ .header.len = sizeof(uvcb),
+ .guest_handle = handle,
+ .gaddr = gaddr,
+ };
+
+ return uv_call(0, (uint64_t)&uvcb);
+}
+
+static inline int uv_export(unsigned long paddr)
+{
+ struct uv_cb_cfs uvcb = {
+ .header.cmd = UVC_CMD_CONV_FROM_SEC_STOR,
+ .header.len = sizeof(uvcb),
+ .paddr = paddr
+ };
+
+ return uv_call(0, (u64)&uvcb);
+}
+
+/*
+ * Requests the Ultravisor to destroy a guest page and make it
+ * accessible to the host. The destroy clears the page instead of
+ * exporting.
+ *
+ * @paddr: Absolute host address of page to be destroyed
+ */
+static inline int uv_destroy_page(unsigned long paddr)
+{
+ struct uv_cb_cfs uvcb = {
+ .header.cmd = UVC_CMD_DESTR_SEC_STOR,
+ .header.len = sizeof(uvcb),
+ .paddr = paddr
+ };
+
+ return uv_call(0, (uint64_t)&uvcb);
+}
+
struct uv_cb_cpu_set_state {
struct uv_cb_header header;
u64 reserved08[2];
@@ -270,4 +328,31 @@ struct uv_cb_cpu_set_state {
#define PV_CPU_STATE_CHKSTP 3
#define PV_CPU_STATE_OPR_LOAD 5

+static inline int uv_set_cpu_state(uint64_t handle, uint8_t state)
+{
+ struct uv_cb_cpu_set_state uvcb = {
+ .header.cmd = UVC_CMD_CPU_SET_STATE,
+ .header.len = sizeof(uvcb),
+ .cpu_handle = handle,
+ .state = state,
+ };
+
+ assert(handle);
+ return uv_call(0, (uint64_t)&uvcb);
+}
+
+static inline int uv_set_se_hdr(uint64_t handle, void *hdr, size_t len)
+{
+ struct uv_cb_ssc uvcb = {
+ .header.cmd = UVC_CMD_SET_SEC_CONF_PARAMS,
+ .header.len = sizeof(uvcb),
+ .sec_header_origin = (uint64_t)hdr,
+ .sec_header_len = len,
+ .guest_handle = handle,
+ };
+
+ assert(handle);
+ return uv_call(0, (uint64_t)&uvcb);
+}
+
#endif
--
2.32.0