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50 lines
1.5 KiB
50 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_INVPCID |
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#define _ASM_X86_INVPCID |
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static inline void __invpcid(unsigned long pcid, unsigned long addr, |
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unsigned long type) |
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{ |
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struct { u64 d[2]; } desc = { { pcid, addr } }; |
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/* |
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* The memory clobber is because the whole point is to invalidate |
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* stale TLB entries and, especially if we're flushing global |
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* mappings, we don't want the compiler to reorder any subsequent |
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* memory accesses before the TLB flush. |
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*/ |
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asm volatile("invpcid %[desc], %[type]" |
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:: [desc] "m" (desc), [type] "r" (type) : "memory"); |
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} |
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#define INVPCID_TYPE_INDIV_ADDR 0 |
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#define INVPCID_TYPE_SINGLE_CTXT 1 |
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#define INVPCID_TYPE_ALL_INCL_GLOBAL 2 |
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#define INVPCID_TYPE_ALL_NON_GLOBAL 3 |
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/* Flush all mappings for a given pcid and addr, not including globals. */ |
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static inline void invpcid_flush_one(unsigned long pcid, |
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unsigned long addr) |
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{ |
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__invpcid(pcid, addr, INVPCID_TYPE_INDIV_ADDR); |
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} |
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/* Flush all mappings for a given PCID, not including globals. */ |
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static inline void invpcid_flush_single_context(unsigned long pcid) |
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{ |
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__invpcid(pcid, 0, INVPCID_TYPE_SINGLE_CTXT); |
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} |
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/* Flush all mappings, including globals, for all PCIDs. */ |
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static inline void invpcid_flush_all(void) |
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{ |
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__invpcid(0, 0, INVPCID_TYPE_ALL_INCL_GLOBAL); |
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} |
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/* Flush all mappings for all PCIDs except globals. */ |
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static inline void invpcid_flush_all_nonglobals(void) |
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{ |
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__invpcid(0, 0, INVPCID_TYPE_ALL_NON_GLOBAL); |
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} |
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#endif /* _ASM_X86_INVPCID */
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