204 lines
6.1 KiB
C
204 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2021-2022 Intel Corporation */
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#ifndef _ASM_X86_TDX_H
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#define _ASM_X86_TDX_H
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#include <linux/init.h>
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#include <linux/bits.h>
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#include <linux/mmzone.h>
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#include <asm/errno.h>
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#include <asm/ptrace.h>
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#include <asm/trapnr.h>
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#include <asm/shared/tdx.h>
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/*
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* SW-defined error codes.
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*
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* Bits 47:40 == 0xFF indicate Reserved status code class that never used by
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* TDX module.
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*/
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#define TDX_ERROR _BITUL(63)
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#define TDX_NON_RECOVERABLE _BITUL(62)
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#define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40))
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#define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000))
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#define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP)
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#define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD)
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/*
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* TDX module SEAMCALL leaf function error codes
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*/
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#define TDX_SUCCESS 0ULL
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#define TDX_RND_NO_ENTROPY 0x8000020300000000ULL
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#ifndef __ASSEMBLY__
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#include <uapi/asm/mce.h>
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#include <asm/tdx_global_metadata.h>
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#include <linux/pgtable.h>
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#include <asm/io.h>
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/*
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* Used by the #VE exception handler to gather the #VE exception
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* info from the TDX module. This is a software only structure
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* and not part of the TDX module/VMM ABI.
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*/
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struct ve_info {
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u64 exit_reason;
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u64 exit_qual;
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/* Guest Linear (virtual) Address */
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u64 gla;
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/* Guest Physical Address */
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u64 gpa;
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u32 instr_len;
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u32 instr_info;
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};
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#ifdef CONFIG_INTEL_TDX_GUEST
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void __init tdx_early_init(void);
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void tdx_get_ve_info(struct ve_info *ve);
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bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);
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void tdx_safe_halt(void);
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bool tdx_early_handle_ve(struct pt_regs *regs);
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int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport);
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u64 tdx_hcall_get_quote(u8 *buf, size_t size);
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#else
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static inline void tdx_early_init(void) { };
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static inline void tdx_safe_halt(void) { };
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static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; }
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#endif /* CONFIG_INTEL_TDX_GUEST */
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#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST)
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long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2,
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unsigned long p3, unsigned long p4);
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#else
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static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1,
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unsigned long p2, unsigned long p3,
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unsigned long p4)
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{
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return -ENODEV;
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}
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#endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */
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#ifdef CONFIG_INTEL_TDX_HOST
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u64 __seamcall(u64 fn, struct tdx_module_args *args);
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u64 __seamcall_ret(u64 fn, struct tdx_module_args *args);
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u64 __seamcall_saved_ret(u64 fn, struct tdx_module_args *args);
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void tdx_init(void);
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#include <asm/archrandom.h>
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typedef u64 (*sc_func_t)(u64 fn, struct tdx_module_args *args);
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static inline u64 sc_retry(sc_func_t func, u64 fn,
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struct tdx_module_args *args)
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{
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int retry = RDRAND_RETRY_LOOPS;
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u64 ret;
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do {
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ret = func(fn, args);
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} while (ret == TDX_RND_NO_ENTROPY && --retry);
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return ret;
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}
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#define seamcall(_fn, _args) sc_retry(__seamcall, (_fn), (_args))
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#define seamcall_ret(_fn, _args) sc_retry(__seamcall_ret, (_fn), (_args))
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#define seamcall_saved_ret(_fn, _args) sc_retry(__seamcall_saved_ret, (_fn), (_args))
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int tdx_cpu_enable(void);
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int tdx_enable(void);
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const char *tdx_dump_mce_info(struct mce *m);
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const struct tdx_sys_info *tdx_get_sysinfo(void);
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int tdx_guest_keyid_alloc(void);
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u32 tdx_get_nr_guest_keyids(void);
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void tdx_guest_keyid_free(unsigned int keyid);
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struct tdx_td {
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/* TD root structure: */
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struct page *tdr_page;
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int tdcs_nr_pages;
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/* TD control structure: */
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struct page **tdcs_pages;
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/* Size of `tdcx_pages` in struct tdx_vp */
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int tdcx_nr_pages;
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};
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struct tdx_vp {
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/* TDVP root page */
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struct page *tdvpr_page;
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/* TD vCPU control structure: */
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struct page **tdcx_pages;
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};
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static inline u64 mk_keyed_paddr(u16 hkid, struct page *page)
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{
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u64 ret;
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ret = page_to_phys(page);
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/* KeyID bits are just above the physical address bits: */
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ret |= (u64)hkid << boot_cpu_data.x86_phys_bits;
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return ret;
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}
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static inline int pg_level_to_tdx_sept_level(enum pg_level level)
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{
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WARN_ON_ONCE(level == PG_LEVEL_NONE);
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return level - 1;
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}
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u64 tdh_vp_enter(struct tdx_vp *vp, struct tdx_module_args *args);
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u64 tdh_mng_addcx(struct tdx_td *td, struct page *tdcs_page);
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u64 tdh_mem_page_add(struct tdx_td *td, u64 gpa, struct page *page, struct page *source, u64 *ext_err1, u64 *ext_err2);
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u64 tdh_mem_sept_add(struct tdx_td *td, u64 gpa, int level, struct page *page, u64 *ext_err1, u64 *ext_err2);
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u64 tdh_vp_addcx(struct tdx_vp *vp, struct page *tdcx_page);
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u64 tdh_mem_page_aug(struct tdx_td *td, u64 gpa, int level, struct page *page, u64 *ext_err1, u64 *ext_err2);
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u64 tdh_mem_range_block(struct tdx_td *td, u64 gpa, int level, u64 *ext_err1, u64 *ext_err2);
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u64 tdh_mng_key_config(struct tdx_td *td);
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u64 tdh_mng_create(struct tdx_td *td, u16 hkid);
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u64 tdh_vp_create(struct tdx_td *td, struct tdx_vp *vp);
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u64 tdh_mng_rd(struct tdx_td *td, u64 field, u64 *data);
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u64 tdh_mr_extend(struct tdx_td *td, u64 gpa, u64 *ext_err1, u64 *ext_err2);
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u64 tdh_mr_finalize(struct tdx_td *td);
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u64 tdh_vp_flush(struct tdx_vp *vp);
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u64 tdh_mng_vpflushdone(struct tdx_td *td);
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u64 tdh_mng_key_freeid(struct tdx_td *td);
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u64 tdh_mng_init(struct tdx_td *td, u64 td_params, u64 *extended_err);
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u64 tdh_vp_init(struct tdx_vp *vp, u64 initial_rcx, u32 x2apicid);
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u64 tdh_vp_rd(struct tdx_vp *vp, u64 field, u64 *data);
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u64 tdh_vp_wr(struct tdx_vp *vp, u64 field, u64 data, u64 mask);
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u64 tdh_phymem_page_reclaim(struct page *page, u64 *tdx_pt, u64 *tdx_owner, u64 *tdx_size);
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u64 tdh_mem_track(struct tdx_td *tdr);
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u64 tdh_mem_page_remove(struct tdx_td *td, u64 gpa, u64 level, u64 *ext_err1, u64 *ext_err2);
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u64 tdh_phymem_cache_wb(bool resume);
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u64 tdh_phymem_page_wbinvd_tdr(struct tdx_td *td);
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u64 tdh_phymem_page_wbinvd_hkid(u64 hkid, struct page *page);
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#else
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static inline void tdx_init(void) { }
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static inline int tdx_cpu_enable(void) { return -ENODEV; }
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static inline int tdx_enable(void) { return -ENODEV; }
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static inline u32 tdx_get_nr_guest_keyids(void) { return 0; }
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static inline const char *tdx_dump_mce_info(struct mce *m) { return NULL; }
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static inline const struct tdx_sys_info *tdx_get_sysinfo(void) { return NULL; }
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#endif /* CONFIG_INTEL_TDX_HOST */
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_TDX_H */
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