/* SPDX-License-Identifier: GPL-2.0 */
/*
* Ultravisor Interfaces
*
* Copyright IBM Corp . 2019 , 2024
*
* Author ( s ) :
* Vasily Gorbik < gor @ linux . ibm . com >
* Janosch Frank < frankja @ linux . ibm . com >
*/
#ifndef _ASM_S390_UV_H
#define _ASM_S390_UV_H
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/bug.h>
#include <linux/sched.h>
#include <asm /page.h>
#include <asm /asm .h>
#define UVC_CC_OK 0
#define UVC_CC_ERROR 1
#define UVC_CC_BUSY 2
#define UVC_CC_PARTIAL 3
#define UVC_RC_EXECUTED 0 x0001
#define UVC_RC_INV_CMD 0 x0002
#define UVC_RC_INV_STATE 0 x0003
#define UVC_RC_INV_LEN 0 x0005
#define UVC_RC_NO_RESUME 0 x0007
#define UVC_RC_MORE_DATA 0 x0100
#define UVC_RC_NEED_DESTROY 0 x8000
#define UVC_CMD_QUI 0 x0001
#define UVC_CMD_QUERY_KEYS 0 x0002
#define UVC_CMD_INIT_UV 0 x000f
#define UVC_CMD_CREATE_SEC_CONF 0 x0100
#define UVC_CMD_DESTROY_SEC_CONF 0 x0101
#define UVC_CMD_DESTROY_SEC_CONF_FAST 0 x0102
#define UVC_CMD_CREATE_SEC_CPU 0 x0120
#define UVC_CMD_DESTROY_SEC_CPU 0 x0121
#define UVC_CMD_CONV_TO_SEC_STOR 0 x0200
#define UVC_CMD_CONV_FROM_SEC_STOR 0 x0201
#define UVC_CMD_DESTR_SEC_STOR 0 x0202
#define UVC_CMD_SET_SEC_CONF_PARAMS 0 x0300
#define UVC_CMD_UNPACK_IMG 0 x0301
#define UVC_CMD_VERIFY_IMG 0 x0302
#define UVC_CMD_CPU_RESET 0 x0310
#define UVC_CMD_CPU_RESET_INITIAL 0 x0311
#define UVC_CMD_PREPARE_RESET 0 x0320
#define UVC_CMD_CPU_RESET_CLEAR 0 x0321
#define UVC_CMD_CPU_SET_STATE 0 x0330
#define UVC_CMD_SET_UNSHARE_ALL 0 x0340
#define UVC_CMD_PIN_PAGE_SHARED 0 x0341
#define UVC_CMD_UNPIN_PAGE_SHARED 0 x0342
#define UVC_CMD_DUMP_INIT 0 x0400
#define UVC_CMD_DUMP_CONF_STOR_STATE 0 x0401
#define UVC_CMD_DUMP_CPU 0 x0402
#define UVC_CMD_DUMP_COMPLETE 0 x0403
#define UVC_CMD_SET_SHARED_ACCESS 0 x1000
#define UVC_CMD_REMOVE_SHARED_ACCESS 0 x1001
#define UVC_CMD_RETR_ATTEST 0 x1020
#define UVC_CMD_ADD_SECRET 0 x1031
#define UVC_CMD_LIST_SECRETS 0 x1033
#define UVC_CMD_LOCK_SECRETS 0 x1034
#define UVC_CMD_RETR_SECRET 0 x1035
/* Bits in installed uv calls */
enum uv_cmds_inst {
BIT_UVC_CMD_QUI = 0 ,
BIT_UVC_CMD_INIT_UV = 1 ,
BIT_UVC_CMD_CREATE_SEC_CONF = 2 ,
BIT_UVC_CMD_DESTROY_SEC_CONF = 3 ,
BIT_UVC_CMD_CREATE_SEC_CPU = 4 ,
BIT_UVC_CMD_DESTROY_SEC_CPU = 5 ,
BIT_UVC_CMD_CONV_TO_SEC_STOR = 6 ,
BIT_UVC_CMD_CONV_FROM_SEC_STOR = 7 ,
BIT_UVC_CMD_SET_SHARED_ACCESS = 8 ,
BIT_UVC_CMD_REMOVE_SHARED_ACCESS = 9 ,
BIT_UVC_CMD_SET_SEC_PARMS = 11 ,
BIT_UVC_CMD_UNPACK_IMG = 13 ,
BIT_UVC_CMD_VERIFY_IMG = 14 ,
BIT_UVC_CMD_CPU_RESET = 15 ,
BIT_UVC_CMD_CPU_RESET_INITIAL = 16 ,
BIT_UVC_CMD_CPU_SET_STATE = 17 ,
BIT_UVC_CMD_PREPARE_RESET = 18 ,
BIT_UVC_CMD_CPU_PERFORM_CLEAR_RESET = 19 ,
BIT_UVC_CMD_UNSHARE_ALL = 20 ,
BIT_UVC_CMD_PIN_PAGE_SHARED = 21 ,
BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22 ,
BIT_UVC_CMD_DESTROY_SEC_CONF_FAST = 23 ,
BIT_UVC_CMD_DUMP_INIT = 24 ,
BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE = 25 ,
BIT_UVC_CMD_DUMP_CPU = 26 ,
BIT_UVC_CMD_DUMP_COMPLETE = 27 ,
BIT_UVC_CMD_RETR_ATTEST = 28 ,
BIT_UVC_CMD_ADD_SECRET = 29 ,
BIT_UVC_CMD_LIST_SECRETS = 30 ,
BIT_UVC_CMD_LOCK_SECRETS = 31 ,
BIT_UVC_CMD_RETR_SECRET = 33 ,
BIT_UVC_CMD_QUERY_KEYS = 34 ,
};
enum uv_feat_ind {
BIT_UV_FEAT_MISC = 0 ,
BIT_UV_FEAT_AIV = 1 ,
BIT_UV_FEAT_AP = 4 ,
BIT_UV_FEAT_AP_INTR = 5 ,
};
struct uv_cb_header {
u16 len;
u16 cmd; /* Command Code */
u16 rc; /* Response Code */
u16 rrc; /* Return Reason Code */
} __packed __aligned(8 );
/* Query Ultravisor Information */
struct uv_cb_qui {
struct uv_cb_header header; /* 0x0000 */
u64 reserved08; /* 0x0008 */
u64 inst_calls_list[4 ]; /* 0x0010 */
u64 reserved30[2 ]; /* 0x0030 */
u64 uv_base_stor_len; /* 0x0040 */
u64 reserved48; /* 0x0048 */
u64 conf_base_phys_stor_len; /* 0x0050 */
u64 conf_base_virt_stor_len; /* 0x0058 */
u64 conf_virt_var_stor_len; /* 0x0060 */
u64 cpu_stor_len; /* 0x0068 */
u32 reserved70[3 ]; /* 0x0070 */
u32 max_num_sec_conf; /* 0x007c */
u64 max_guest_stor_addr; /* 0x0080 */
u8 reserved88[0 x9e - 0 x88]; /* 0x0088 */
u16 max_guest_cpu_id; /* 0x009e */
u64 uv_feature_indications; /* 0x00a0 */
u64 reserveda8; /* 0x00a8 */
u64 supp_se_hdr_versions; /* 0x00b0 */
u64 supp_se_hdr_pcf; /* 0x00b8 */
u64 reservedc0; /* 0x00c0 */
u64 conf_dump_storage_state_len; /* 0x00c8 */
u64 conf_dump_finalize_len; /* 0x00d0 */
u64 reservedd8; /* 0x00d8 */
u64 supp_att_req_hdr_ver; /* 0x00e0 */
u64 supp_att_pflags; /* 0x00e8 */
u64 reservedf0; /* 0x00f0 */
u64 supp_add_secret_req_ver; /* 0x00f8 */
u64 supp_add_secret_pcf; /* 0x0100 */
u64 supp_secret_types; /* 0x0108 */
u16 max_assoc_secrets; /* 0x0110 */
u16 max_retr_secrets; /* 0x0112 */
u8 reserved114[0 x120 - 0 x114]; /* 0x0114 */
} __packed __aligned(8 );
struct uv_key_hash {
u64 dword[4 ];
} __packed __aligned(8 );
#define UVC_QUERY_KEYS_IDX_HK 0
#define UVC_QUERY_KEYS_IDX_BACK_HK 1
/* Query Ultravisor Keys */
struct uv_cb_query_keys {
struct uv_cb_header header; /* 0x0000 */
u64 reserved08[3 ]; /* 0x0008 */
struct uv_key_hash key_hashes[15 ]; /* 0x0020 */
} __packed __aligned(8 );
static_assert(sizeof (struct uv_cb_query_keys) == 0 x200);
/* Initialize Ultravisor */
struct uv_cb_init {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 stor_origin;
u64 stor_len;
u64 reserved28[4 ];
} __packed __aligned(8 );
/* Create Guest Configuration */
struct uv_cb_cgc {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 guest_handle;
u64 conf_base_stor_origin;
u64 conf_virt_stor_origin;
u8 reserved30[6 ];
union {
struct {
u16 : 14 ;
u16 ap_instr_intr : 1 ;
u16 ap_allow_instr : 1 ;
};
u16 raw;
} flags;
u64 guest_stor_origin;
u64 guest_stor_len;
u64 guest_sca;
u64 guest_asce;
u64 reserved58[5 ];
} __packed __aligned(8 );
/* Create Secure CPU */
struct uv_cb_csc {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 cpu_handle;
u64 guest_handle;
u64 stor_origin;
u8 reserved30[6 ];
u16 num;
u64 state_origin;
u64 reserved40[4 ];
} __packed __aligned(8 );
/* Convert to Secure */
struct uv_cb_cts {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 guest_handle;
u64 gaddr;
} __packed __aligned(8 );
/* Convert from Secure / Pin Page Shared */
struct uv_cb_cfs {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 paddr;
} __packed __aligned(8 );
/* Set Secure Config Parameter */
struct uv_cb_ssc {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 guest_handle;
u64 sec_header_origin;
u32 sec_header_len;
u32 reserved2c;
u64 reserved30[4 ];
} __packed __aligned(8 );
/* Unpack */
struct uv_cb_unp {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 guest_handle;
u64 gaddr;
u64 tweak[2 ];
u64 reserved38[3 ];
} __packed __aligned(8 );
#define PV_CPU_STATE_OPR 1
#define PV_CPU_STATE_STP 2
#define PV_CPU_STATE_CHKSTP 3
#define PV_CPU_STATE_OPR_LOAD 5
struct uv_cb_cpu_set_state {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 cpu_handle;
u8 reserved20[7 ];
u8 state;
u64 reserved28[5 ];
};
/*
* A common UV call struct for calls that take no payload
* Examples :
* Destroy cpu / config
* Verify
*/
struct uv_cb_nodata {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 handle;
u64 reserved20[4 ];
} __packed __aligned(8 );
/* Destroy Configuration Fast */
struct uv_cb_destroy_fast {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 handle;
u64 reserved20[5 ];
} __packed __aligned(8 );
/* Set Shared Access */
struct uv_cb_share {
struct uv_cb_header header;
u64 reserved08[3 ];
u64 paddr;
u64 reserved28;
} __packed __aligned(8 );
/* Retrieve Attestation Measurement */
struct uv_cb_attest {
struct uv_cb_header header; /* 0x0000 */
u64 reserved08[2 ]; /* 0x0008 */
u64 arcb_addr; /* 0x0018 */
u64 cont_token; /* 0x0020 */
u8 reserved28[6 ]; /* 0x0028 */
u16 user_data_len; /* 0x002e */
u8 user_data[256 ]; /* 0x0030 */
u32 reserved130[3 ]; /* 0x0130 */
u32 meas_len; /* 0x013c */
u64 meas_addr; /* 0x0140 */
u8 config_uid[16 ]; /* 0x0148 */
u32 reserved158; /* 0x0158 */
u32 add_data_len; /* 0x015c */
u64 add_data_addr; /* 0x0160 */
u64 reserved168[4 ]; /* 0x0168 */
} __packed __aligned(8 );
struct uv_cb_dump_cpu {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 cpu_handle;
u64 dump_area_origin;
u64 reserved28[5 ];
} __packed __aligned(8 );
struct uv_cb_dump_stor_state {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 config_handle;
u64 dump_area_origin;
u64 gaddr;
u64 reserved28[4 ];
} __packed __aligned(8 );
struct uv_cb_dump_complete {
struct uv_cb_header header;
u64 reserved08[2 ];
u64 config_handle;
u64 dump_area_origin;
u64 reserved30[5 ];
} __packed __aligned(8 );
/*
* A common UV call struct for pv guests that contains a single address
* Examples :
* Add Secret
*/
struct uv_cb_guest_addr {
struct uv_cb_header header;
u64 reserved08[3 ];
u64 addr;
u64 reserved28[4 ];
} __packed __aligned(8 );
#define UVC_RC_RETR_SECR_BUF_SMALL 0 x0109
#define UVC_RC_RETR_SECR_STORE_EMPTY 0 x010f
#define UVC_RC_RETR_SECR_INV_IDX 0 x0110
#define UVC_RC_RETR_SECR_INV_SECRET 0 x0111
struct uv_cb_retr_secr {
struct uv_cb_header header;
u64 reserved08[2 ];
u16 secret_idx;
u16 reserved1a;
u32 buf_size;
u64 buf_addr;
u64 reserved28[4 ];
} __packed __aligned(8 );
struct uv_cb_list_secrets {
struct uv_cb_header header;
u64 reserved08[2 ];
u8 reserved18[6 ];
u16 start_idx;
u64 list_addr;
u64 reserved28[4 ];
} __packed __aligned(8 );
enum uv_secret_types {
UV_SECRET_INVAL = 0 x0,
UV_SECRET_NULL = 0 x1,
UV_SECRET_ASSOCIATION = 0 x2,
UV_SECRET_PLAIN = 0 x3,
UV_SECRET_AES_128 = 0 x4,
UV_SECRET_AES_192 = 0 x5,
UV_SECRET_AES_256 = 0 x6,
UV_SECRET_AES_XTS_128 = 0 x7,
UV_SECRET_AES_XTS_256 = 0 x8,
UV_SECRET_HMAC_SHA_256 = 0 x9,
UV_SECRET_HMAC_SHA_512 = 0 xa,
/* 0x0b - 0x10 reserved */
UV_SECRET_ECDSA_P256 = 0 x11,
UV_SECRET_ECDSA_P384 = 0 x12,
UV_SECRET_ECDSA_P521 = 0 x13,
UV_SECRET_ECDSA_ED25519 = 0 x14,
UV_SECRET_ECDSA_ED448 = 0 x15,
};
/**
* uv_secret_list_item_hdr - UV secret metadata .
* @ index : Index of the secret in the secret list .
* @ type : Type of the secret . See ` enum uv_secret_types ` .
* @ length : Length of the stored secret .
*/
struct uv_secret_list_item_hdr {
u16 index;
u16 type;
u32 length;
} __packed __aligned(8 );
#define UV_SECRET_ID_LEN 32
/**
* uv_secret_list_item - UV secret entry .
* @ hdr : The metadata of this secret .
* @ id : The ID of this secret , not the secret itself .
*/
struct uv_secret_list_item {
struct uv_secret_list_item_hdr hdr;
u64 reserverd08;
u8 id[UV_SECRET_ID_LEN];
} __packed __aligned(8 );
/**
* uv_secret_list - UV secret - metadata list .
* @ num_secr_stored : Number of secrets stored in this list .
* @ total_num_secrets : Number of secrets stored in the UV for this guest .
* @ next_secret_idx : positive number if there are more secrets available or zero .
* @ secrets : Up to 85 UV - secret metadata entries .
*/
struct uv_secret_list {
u16 num_secr_stored;
u16 total_num_secrets;
u16 next_secret_idx;
u16 reserved_06;
u64 reserved_08;
struct uv_secret_list_item secrets[85 ];
} __packed __aligned(8 );
static_assert(sizeof (struct uv_secret_list) == PAGE_SIZE);
static inline int __uv_call(unsigned long r1, unsigned long r2)
{
int cc;
asm volatile (
" .insn rrf,0xb9a40000,%[r1],%[r2],0,0\n"
CC_IPM(cc)
: CC_OUT(cc, cc)
: [r1] "a" (r1), [r2] "a" (r2)
: CC_CLOBBER_LIST("memory" ));
return CC_TRANSFORM(cc);
}
static inline int uv_call(unsigned long r1, unsigned long r2)
{
int cc;
do {
cc = __uv_call(r1, r2);
} while (cc > 1 );
return cc;
}
/* Low level uv_call that avoids stalls for long running busy conditions */
static inline int uv_call_sched(unsigned long r1, unsigned long r2)
{
int cc;
do {
cc = __uv_call(r1, r2);
cond_resched();
} while (cc > 1 );
return cc;
}
/*
* special variant of uv_call that only transports the cpu or guest
* handle and the command , like destroy or verify .
*/
static inline int uv_cmd_nodata(u64 handle, u16 cmd, u16 *rc, u16 *rrc)
{
struct uv_cb_nodata uvcb = {
.header.cmd = cmd,
.header.len = sizeof (uvcb),
.handle = handle,
};
int cc;
WARN(!handle, "No handle provided to Ultravisor call cmd %x\n" , cmd);
cc = uv_call_sched(0 , (u64)&uvcb);
*rc = uvcb.header.rc;
*rrc = uvcb.header.rrc;
return cc ? -EINVAL : 0 ;
}
/**
* uv_list_secrets ( ) - Do a List Secrets UVC .
*
* @ buf : Buffer to write list into ; size of one page .
* @ start_idx : The smallest index that should be included in the list .
* For the fist invocation use 0 .
* @ rc : Pointer to store the return code or NULL .
* @ rrc : Pointer to store the return reason code or NULL .
*
* This function calls the List Secrets UVC . The result is written into ` buf ` ,
* that needs to be at least one page of writable memory .
* ` buf ` consists of :
* * % struct uv_secret_list_hdr
* * % struct uv_secret_list_item ( multiple )
*
* For ` start_idx ` use _ 0 _ for the first call . If there are more secrets available
* but could not fit into the page then ` rc ` is ` UVC_RC_MORE_DATA ` .
* In this case use ` uv_secret_list_hdr . next_secret_idx ` for ` start_idx ` .
*
* Context : might sleep .
*
* Return : The UVC condition code .
*/
static inline int uv_list_secrets(struct uv_secret_list *buf, u16 start_idx,
u16 *rc, u16 *rrc)
{
struct uv_cb_list_secrets uvcb = {
.header.len = sizeof (uvcb),
.header.cmd = UVC_CMD_LIST_SECRETS,
.start_idx = start_idx,
.list_addr = (u64)buf,
};
int cc = uv_call_sched(0 , (u64)&uvcb);
if (rc)
*rc = uvcb.header.rc;
if (rrc)
*rrc = uvcb.header.rrc;
return cc;
}
struct uv_info {
unsigned long inst_calls_list[4 ];
unsigned long uv_base_stor_len;
unsigned long guest_base_stor_len;
unsigned long guest_virt_base_stor_len;
unsigned long guest_virt_var_stor_len;
unsigned long guest_cpu_stor_len;
unsigned long max_sec_stor_addr;
unsigned int max_num_sec_conf;
unsigned short max_guest_cpu_id;
unsigned long uv_feature_indications;
unsigned long supp_se_hdr_ver;
unsigned long supp_se_hdr_pcf;
unsigned long conf_dump_storage_state_len;
unsigned long conf_dump_finalize_len;
unsigned long supp_att_req_hdr_ver;
unsigned long supp_att_pflags;
unsigned long supp_add_secret_req_ver;
unsigned long supp_add_secret_pcf;
unsigned long supp_secret_types;
unsigned short max_assoc_secrets;
unsigned short max_retr_secrets;
};
extern struct uv_info uv_info;
static inline bool uv_has_feature(u8 feature_bit)
{
if (feature_bit >= sizeof (uv_info.uv_feature_indications) * 8 )
return false ;
return test_bit_inv(feature_bit, &uv_info.uv_feature_indications);
}
extern int prot_virt_guest;
static inline int is_prot_virt_guest(void )
{
return prot_virt_guest;
}
static inline int share(unsigned long addr, u16 cmd)
{
struct uv_cb_share uvcb = {
.header.cmd = cmd,
.header.len = sizeof (uvcb),
.paddr = addr
};
if (!is_prot_virt_guest())
return -EOPNOTSUPP;
/*
* Sharing is page wise , if we encounter addresses that are
* not page aligned , we assume something went wrong . If
* malloced structs are passed to this function , we could leak
* data to the hypervisor .
*/
BUG_ON(addr & ~PAGE_MASK);
if (!uv_call(0 , (u64)&uvcb))
return 0 ;
pr_err("%s UVC failed (rc: 0x%x, rrc: 0x%x), possible hypervisor bug.\n" ,
uvcb.header.cmd == UVC_CMD_SET_SHARED_ACCESS ? "Share" : "Unshare" ,
uvcb.header.rc, uvcb.header.rrc);
panic("System security cannot be guaranteed unless the system panics now.\n" );
}
/*
* Guest 2 request to the Ultravisor to make a page shared with the
* hypervisor for IO .
*
* @ addr : Real or absolute address of the page to be shared
*/
static inline int uv_set_shared(unsigned long addr)
{
return share(addr, UVC_CMD_SET_SHARED_ACCESS);
}
/*
* Guest 2 request to the Ultravisor to make a page unshared .
*
* @ addr : Real or absolute address of the page to be unshared
*/
static inline int uv_remove_shared(unsigned long addr)
{
return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS);
}
int uv_find_secret(const u8 secret_id[UV_SECRET_ID_LEN],
struct uv_secret_list *list,
struct uv_secret_list_item_hdr *secret);
int uv_retrieve_secret(u16 secret_idx, u8 *buf, size_t buf_size);
extern int prot_virt_host;
static inline int is_prot_virt_host(void )
{
return prot_virt_host;
}
int uv_pin_shared(unsigned long paddr);
int uv_destroy_folio(struct folio *folio);
int uv_destroy_pte(pte_t pte);
int uv_convert_from_secure_pte(pte_t pte);
int make_hva_secure(struct mm_struct *mm, unsigned long hva, struct uv_cb_header *uvcb);
int uv_convert_from_secure(unsigned long paddr);
int uv_convert_from_secure_folio(struct folio *folio);
void setup_uv(void );
#endif /* _ASM_S390_UV_H */
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