/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_SHARED_TDX_H
#define _ASM_X86_SHARED_TDX_H
#include <linux/bits.h>
#include <linux/types.h>
#define TDX_HYPERCALL_STANDARD 0
#define TDX_CPUID_LEAF_ID 0 x21
#define TDX_IDENT "IntelTDX "
/* TDX module Call Leaf IDs */
#define TDG_VP_VMCALL 0
#define TDG_VP_INFO 1
#define TDG_MR_RTMR_EXTEND 2
#define TDG_VP_VEINFO_GET 3
#define TDG_MR_REPORT 4
#define TDG_MEM_PAGE_ACCEPT 6
#define TDG_VM_RD 7
#define TDG_VM_WR 8
/* TDX attributes */
#define TDX_ATTR_DEBUG_BIT 0
#define TDX_ATTR_DEBUG BIT_ULL(TDX_ATTR_DEBUG_BIT)
#define TDX_ATTR_HGS_PLUS_PROF_BIT 4
#define TDX_ATTR_HGS_PLUS_PROF BIT_ULL(TDX_ATTR_HGS_PLUS_PROF_BIT)
#define TDX_ATTR_PERF_PROF_BIT 5
#define TDX_ATTR_PERF_PROF BIT_ULL(TDX_ATTR_PERF_PROF_BIT)
#define TDX_ATTR_PMT_PROF_BIT 6
#define TDX_ATTR_PMT_PROF BIT_ULL(TDX_ATTR_PMT_PROF_BIT)
#define TDX_ATTR_ICSSD_BIT 16
#define TDX_ATTR_ICSSD BIT_ULL(TDX_ATTR_ICSSD_BIT)
#define TDX_ATTR_LASS_BIT 27
#define TDX_ATTR_LASS BIT_ULL(TDX_ATTR_LASS_BIT)
#define TDX_ATTR_SEPT_VE_DISABLE_BIT 28
#define TDX_ATTR_SEPT_VE_DISABLE BIT_ULL(TDX_ATTR_SEPT_VE_DISABLE_BIT)
#define TDX_ATTR_MIGRTABLE_BIT 29
#define TDX_ATTR_MIGRTABLE BIT_ULL(TDX_ATTR_MIGRTABLE_BIT)
#define TDX_ATTR_PKS_BIT 30
#define TDX_ATTR_PKS BIT_ULL(TDX_ATTR_PKS_BIT)
#define TDX_ATTR_KL_BIT 31
#define TDX_ATTR_KL BIT_ULL(TDX_ATTR_KL_BIT)
#define TDX_ATTR_TPA_BIT 62
#define TDX_ATTR_TPA BIT_ULL(TDX_ATTR_TPA_BIT)
#define TDX_ATTR_PERFMON_BIT 63
#define TDX_ATTR_PERFMON BIT_ULL(TDX_ATTR_PERFMON_BIT)
/* TDX TD-Scope Metadata. To be used by TDG.VM.WR and TDG.VM.RD */
#define TDCS_CONFIG_FLAGS 0 x1110000300000016
#define TDCS_TD_CTLS 0 x1110000300000017
#define TDCS_NOTIFY_ENABLES 0 x9100000000000010
#define TDCS_TOPOLOGY_ENUM_CONFIGURED 0 x9100000000000019
/* TDCS_CONFIG_FLAGS bits */
#define TDCS_CONFIG_FLEXIBLE_PENDING_VE BIT_ULL(1 )
/* TDCS_TD_CTLS bits */
#define TD_CTLS_PENDING_VE_DISABLE_BIT 0
#define TD_CTLS_PENDING_VE_DISABLE BIT_ULL(TD_CTLS_PENDING_VE_DISABLE_BIT)
#define TD_CTLS_ENUM_TOPOLOGY_BIT 1
#define TD_CTLS_ENUM_TOPOLOGY BIT_ULL(TD_CTLS_ENUM_TOPOLOGY_BIT)
#define TD_CTLS_VIRT_CPUID2_BIT 2
#define TD_CTLS_VIRT_CPUID2 BIT_ULL(TD_CTLS_VIRT_CPUID2_BIT)
#define TD_CTLS_REDUCE_VE_BIT 3
#define TD_CTLS_REDUCE_VE BIT_ULL(TD_CTLS_REDUCE_VE_BIT)
#define TD_CTLS_LOCK_BIT 63
#define TD_CTLS_LOCK BIT_ULL(TD_CTLS_LOCK_BIT)
/* TDX hypercall Leaf IDs */
#define TDVMCALL_GET_TD_VM_CALL_INFO 0 x10000
#define TDVMCALL_MAP_GPA 0 x10001
#define TDVMCALL_GET_QUOTE 0 x10002
#define TDVMCALL_REPORT_FATAL_ERROR 0 x10003
#define TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT 0 x10004ULL
/*
* TDG . VP . VMCALL Status Codes ( returned in R10 )
*/
#define TDVMCALL_STATUS_SUCCESS 0 x0000000000000000ULL
#define TDVMCALL_STATUS_RETRY 0 x0000000000000001ULL
#define TDVMCALL_STATUS_INVALID_OPERAND 0 x8000000000000000ULL
#define TDVMCALL_STATUS_ALIGN_ERROR 0 x8000000000000002ULL
#define TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED 0 x8000000000000003ULL
/*
* Bitmasks of exposed registers ( with VMM ) .
*/
#define TDX_RDX BIT(2 )
#define TDX_RBX BIT(3 )
#define TDX_RSI BIT(6 )
#define TDX_RDI BIT(7 )
#define TDX_R8 BIT(8 )
#define TDX_R9 BIT(9 )
#define TDX_R10 BIT(10 )
#define TDX_R11 BIT(11 )
#define TDX_R12 BIT(12 )
#define TDX_R13 BIT(13 )
#define TDX_R14 BIT(14 )
#define TDX_R15 BIT(15 )
/*
* These registers are clobbered to hold arguments for each
* TDVMCALL . They are safe to expose to the VMM .
* Each bit in this mask represents a register ID . Bit field
* details can be found in TDX GHCI specification , section
* titled " TDCALL [ TDG . VP . VMCALL ] leaf " .
*/
#define TDVMCALL_EXPOSE_REGS_MASK \
(TDX_RDX | TDX_RBX | TDX_RSI | TDX_RDI | TDX_R8 | TDX_R9 | \
TDX_R10 | TDX_R11 | TDX_R12 | TDX_R13 | TDX_R14 | TDX_R15)
/* TDX supported page sizes from the TDX module ABI. */
#define TDX_PS_4K 0
#define TDX_PS_2M 1
#define TDX_PS_1G 2
#define TDX_PS_NR (TDX_PS_1G + 1 )
#ifndef __ASSEMBLER__
#include <linux/compiler_attributes.h>
/*
* Used in _ _ tdcall * ( ) to gather the input / output registers ' values of the
* TDCALL instruction when requesting services from the TDX module . This is a
* software only structure and not part of the TDX module / VMM ABI
*/
struct tdx_module_args {
/* callee-clobbered */
u64 rcx;
u64 rdx;
u64 r8;
u64 r9;
/* extra callee-clobbered */
u64 r10;
u64 r11;
/* callee-saved + rdi/rsi */
u64 r12;
u64 r13;
u64 r14;
u64 r15;
u64 rbx;
u64 rdi;
u64 rsi;
};
/* Used to communicate with the TDX module */
u64 __tdcall(u64 fn, struct tdx_module_args *args);
u64 __tdcall_ret(u64 fn, struct tdx_module_args *args);
u64 __tdcall_saved_ret(u64 fn, struct tdx_module_args *args);
/* Used to request services from the VMM */
u64 __tdx_hypercall(struct tdx_module_args *args);
/*
* Wrapper for standard use of _ _ tdx_hypercall with no output aside from
* return code .
*/
static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15)
{
struct tdx_module_args args = {
.r10 = TDX_HYPERCALL_STANDARD,
.r11 = fn,
.r12 = r12,
.r13 = r13,
.r14 = r14,
.r15 = r15,
};
return __tdx_hypercall(&args);
}
/* Called from __tdx_hypercall() for unrecoverable failure */
void __noreturn __tdx_hypercall_failed(void );
bool tdx_accept_memory(phys_addr_t start, phys_addr_t end);
/*
* The TDG . VP . VMCALL - Instruction - execution sub - functions are defined
* independently from but are currently matched 1 : 1 with VMX EXIT_REASONs .
* Reusing the KVM EXIT_REASON macros makes it easier to connect the host and
* guest sides of these calls .
*/
static __always_inline u64 hcall_func(u64 exit_reason)
{
return exit_reason;
}
#endif /* !__ASSEMBLER__ */
#endif /* _ASM_X86_SHARED_TDX_H */
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