387 lines
8.8 KiB
C
387 lines
8.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Ultravisor Interfaces
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*
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* Copyright IBM Corp. 2019
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*
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* Author(s):
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* Vasily Gorbik <gor@linux.ibm.com>
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* Janosch Frank <frankja@linux.ibm.com>
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*/
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#ifndef _ASM_S390_UV_H
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#define _ASM_S390_UV_H
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/bug.h>
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#include <linux/sched.h>
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#include <asm/page.h>
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#include <asm/gmap.h>
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#define UVC_CC_OK 0
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#define UVC_CC_ERROR 1
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#define UVC_CC_BUSY 2
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#define UVC_CC_PARTIAL 3
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#define UVC_RC_EXECUTED 0x0001
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#define UVC_RC_INV_CMD 0x0002
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#define UVC_RC_INV_STATE 0x0003
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#define UVC_RC_INV_LEN 0x0005
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#define UVC_RC_NO_RESUME 0x0007
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#define UVC_RC_NEED_DESTROY 0x8000
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#define UVC_CMD_QUI 0x0001
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#define UVC_CMD_INIT_UV 0x000f
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#define UVC_CMD_CREATE_SEC_CONF 0x0100
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#define UVC_CMD_DESTROY_SEC_CONF 0x0101
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#define UVC_CMD_CREATE_SEC_CPU 0x0120
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#define UVC_CMD_DESTROY_SEC_CPU 0x0121
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#define UVC_CMD_CONV_TO_SEC_STOR 0x0200
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#define UVC_CMD_CONV_FROM_SEC_STOR 0x0201
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#define UVC_CMD_DESTR_SEC_STOR 0x0202
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#define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
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#define UVC_CMD_UNPACK_IMG 0x0301
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#define UVC_CMD_VERIFY_IMG 0x0302
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#define UVC_CMD_CPU_RESET 0x0310
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#define UVC_CMD_CPU_RESET_INITIAL 0x0311
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#define UVC_CMD_PREPARE_RESET 0x0320
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#define UVC_CMD_CPU_RESET_CLEAR 0x0321
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#define UVC_CMD_CPU_SET_STATE 0x0330
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#define UVC_CMD_SET_UNSHARE_ALL 0x0340
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#define UVC_CMD_PIN_PAGE_SHARED 0x0341
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#define UVC_CMD_UNPIN_PAGE_SHARED 0x0342
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#define UVC_CMD_SET_SHARED_ACCESS 0x1000
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#define UVC_CMD_REMOVE_SHARED_ACCESS 0x1001
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/* Bits in installed uv calls */
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enum uv_cmds_inst {
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BIT_UVC_CMD_QUI = 0,
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BIT_UVC_CMD_INIT_UV = 1,
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BIT_UVC_CMD_CREATE_SEC_CONF = 2,
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BIT_UVC_CMD_DESTROY_SEC_CONF = 3,
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BIT_UVC_CMD_CREATE_SEC_CPU = 4,
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BIT_UVC_CMD_DESTROY_SEC_CPU = 5,
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BIT_UVC_CMD_CONV_TO_SEC_STOR = 6,
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BIT_UVC_CMD_CONV_FROM_SEC_STOR = 7,
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BIT_UVC_CMD_SET_SHARED_ACCESS = 8,
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BIT_UVC_CMD_REMOVE_SHARED_ACCESS = 9,
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BIT_UVC_CMD_SET_SEC_PARMS = 11,
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BIT_UVC_CMD_UNPACK_IMG = 13,
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BIT_UVC_CMD_VERIFY_IMG = 14,
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BIT_UVC_CMD_CPU_RESET = 15,
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BIT_UVC_CMD_CPU_RESET_INITIAL = 16,
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BIT_UVC_CMD_CPU_SET_STATE = 17,
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BIT_UVC_CMD_PREPARE_RESET = 18,
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BIT_UVC_CMD_CPU_PERFORM_CLEAR_RESET = 19,
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BIT_UVC_CMD_UNSHARE_ALL = 20,
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BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
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BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
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};
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enum uv_feat_ind {
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BIT_UV_FEAT_MISC = 0,
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BIT_UV_FEAT_AIV = 1,
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};
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struct uv_cb_header {
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u16 len;
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u16 cmd; /* Command Code */
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u16 rc; /* Response Code */
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u16 rrc; /* Return Reason Code */
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} __packed __aligned(8);
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/* Query Ultravisor Information */
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struct uv_cb_qui {
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struct uv_cb_header header; /* 0x0000 */
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u64 reserved08; /* 0x0008 */
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u64 inst_calls_list[4]; /* 0x0010 */
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u64 reserved30[2]; /* 0x0030 */
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u64 uv_base_stor_len; /* 0x0040 */
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u64 reserved48; /* 0x0048 */
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u64 conf_base_phys_stor_len; /* 0x0050 */
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u64 conf_base_virt_stor_len; /* 0x0058 */
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u64 conf_virt_var_stor_len; /* 0x0060 */
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u64 cpu_stor_len; /* 0x0068 */
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u32 reserved70[3]; /* 0x0070 */
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u32 max_num_sec_conf; /* 0x007c */
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u64 max_guest_stor_addr; /* 0x0080 */
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u8 reserved88[158 - 136]; /* 0x0088 */
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u16 max_guest_cpu_id; /* 0x009e */
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u64 uv_feature_indications; /* 0x00a0 */
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u8 reserveda8[200 - 168]; /* 0x00a8 */
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} __packed __aligned(8);
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/* Initialize Ultravisor */
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struct uv_cb_init {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 stor_origin;
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u64 stor_len;
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u64 reserved28[4];
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} __packed __aligned(8);
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/* Create Guest Configuration */
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struct uv_cb_cgc {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 guest_handle;
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u64 conf_base_stor_origin;
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u64 conf_virt_stor_origin;
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u64 reserved30;
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u64 guest_stor_origin;
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u64 guest_stor_len;
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u64 guest_sca;
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u64 guest_asce;
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u64 reserved58[5];
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} __packed __aligned(8);
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/* Create Secure CPU */
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struct uv_cb_csc {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 cpu_handle;
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u64 guest_handle;
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u64 stor_origin;
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u8 reserved30[6];
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u16 num;
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u64 state_origin;
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u64 reserved40[4];
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} __packed __aligned(8);
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/* Convert to Secure */
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struct uv_cb_cts {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 guest_handle;
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u64 gaddr;
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} __packed __aligned(8);
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/* Convert from Secure / Pin Page Shared */
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struct uv_cb_cfs {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 paddr;
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} __packed __aligned(8);
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/* Set Secure Config Parameter */
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struct uv_cb_ssc {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 guest_handle;
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u64 sec_header_origin;
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u32 sec_header_len;
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u32 reserved2c;
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u64 reserved30[4];
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} __packed __aligned(8);
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/* Unpack */
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struct uv_cb_unp {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 guest_handle;
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u64 gaddr;
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u64 tweak[2];
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u64 reserved38[3];
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} __packed __aligned(8);
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#define PV_CPU_STATE_OPR 1
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#define PV_CPU_STATE_STP 2
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#define PV_CPU_STATE_CHKSTP 3
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#define PV_CPU_STATE_OPR_LOAD 5
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struct uv_cb_cpu_set_state {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 cpu_handle;
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u8 reserved20[7];
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u8 state;
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u64 reserved28[5];
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};
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/*
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* A common UV call struct for calls that take no payload
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* Examples:
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* Destroy cpu/config
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* Verify
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*/
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struct uv_cb_nodata {
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struct uv_cb_header header;
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u64 reserved08[2];
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u64 handle;
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u64 reserved20[4];
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} __packed __aligned(8);
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/* Set Shared Access */
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struct uv_cb_share {
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struct uv_cb_header header;
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u64 reserved08[3];
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u64 paddr;
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u64 reserved28;
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} __packed __aligned(8);
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static inline int __uv_call(unsigned long r1, unsigned long r2)
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{
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int cc;
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asm volatile(
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" .insn rrf,0xB9A40000,%[r1],%[r2],0,0\n"
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" ipm %[cc]\n"
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" srl %[cc],28\n"
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: [cc] "=d" (cc)
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: [r1] "a" (r1), [r2] "a" (r2)
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: "memory", "cc");
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return cc;
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}
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static inline int uv_call(unsigned long r1, unsigned long r2)
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{
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int cc;
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do {
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cc = __uv_call(r1, r2);
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} while (cc > 1);
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return cc;
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}
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/* Low level uv_call that avoids stalls for long running busy conditions */
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static inline int uv_call_sched(unsigned long r1, unsigned long r2)
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{
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int cc;
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do {
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cc = __uv_call(r1, r2);
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cond_resched();
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} while (cc > 1);
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return cc;
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}
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/*
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* special variant of uv_call that only transports the cpu or guest
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* handle and the command, like destroy or verify.
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*/
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static inline int uv_cmd_nodata(u64 handle, u16 cmd, u16 *rc, u16 *rrc)
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{
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struct uv_cb_nodata uvcb = {
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.header.cmd = cmd,
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.header.len = sizeof(uvcb),
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.handle = handle,
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};
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int cc;
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WARN(!handle, "No handle provided to Ultravisor call cmd %x\n", cmd);
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cc = uv_call_sched(0, (u64)&uvcb);
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*rc = uvcb.header.rc;
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*rrc = uvcb.header.rrc;
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return cc ? -EINVAL : 0;
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}
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struct uv_info {
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unsigned long inst_calls_list[4];
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unsigned long uv_base_stor_len;
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unsigned long guest_base_stor_len;
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unsigned long guest_virt_base_stor_len;
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unsigned long guest_virt_var_stor_len;
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unsigned long guest_cpu_stor_len;
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unsigned long max_sec_stor_addr;
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unsigned int max_num_sec_conf;
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unsigned short max_guest_cpu_id;
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unsigned long uv_feature_indications;
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};
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extern struct uv_info uv_info;
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#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
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extern int prot_virt_guest;
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static inline int is_prot_virt_guest(void)
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{
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return prot_virt_guest;
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}
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static inline int share(unsigned long addr, u16 cmd)
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{
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struct uv_cb_share uvcb = {
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.header.cmd = cmd,
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.header.len = sizeof(uvcb),
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.paddr = addr
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};
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if (!is_prot_virt_guest())
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return -EOPNOTSUPP;
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/*
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* Sharing is page wise, if we encounter addresses that are
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* not page aligned, we assume something went wrong. If
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* malloced structs are passed to this function, we could leak
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* data to the hypervisor.
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*/
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BUG_ON(addr & ~PAGE_MASK);
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if (!uv_call(0, (u64)&uvcb))
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return 0;
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return -EINVAL;
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}
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/*
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* Guest 2 request to the Ultravisor to make a page shared with the
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* hypervisor for IO.
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*
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* @addr: Real or absolute address of the page to be shared
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*/
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static inline int uv_set_shared(unsigned long addr)
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{
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return share(addr, UVC_CMD_SET_SHARED_ACCESS);
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}
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/*
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* Guest 2 request to the Ultravisor to make a page unshared.
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*
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* @addr: Real or absolute address of the page to be unshared
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*/
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static inline int uv_remove_shared(unsigned long addr)
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{
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return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS);
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}
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#else
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#define is_prot_virt_guest() 0
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static inline int uv_set_shared(unsigned long addr) { return 0; }
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static inline int uv_remove_shared(unsigned long addr) { return 0; }
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#endif
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#if IS_ENABLED(CONFIG_KVM)
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extern int prot_virt_host;
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static inline int is_prot_virt_host(void)
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{
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return prot_virt_host;
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}
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int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb);
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int uv_destroy_owned_page(unsigned long paddr);
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int uv_convert_from_secure(unsigned long paddr);
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int uv_convert_owned_from_secure(unsigned long paddr);
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int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr);
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void setup_uv(void);
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#else
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#define is_prot_virt_host() 0
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static inline void setup_uv(void) {}
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static inline int uv_destroy_owned_page(unsigned long paddr)
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{
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return 0;
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}
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static inline int uv_convert_from_secure(unsigned long paddr)
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{
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return 0;
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}
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static inline int uv_convert_owned_from_secure(unsigned long paddr)
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{
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return 0;
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}
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#endif
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#endif /* _ASM_S390_UV_H */
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