Date: Sun, 15 Dec 2024 15:40:37 GMT From: Bojan =?utf-8?Q?Novkovi=C4=87?= <bnovkov@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 593e874e6124 - main - amd64: Add wrappers for XRSTORS and XSAVES Message-ID: <202412151540.4BFFebXj069394@gitrepo.freebsd.org>
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The branch main has been updated by bnovkov: URL: https://cgit.FreeBSD.org/src/commit/?id=593e874e61249c845ca83e9284e4d9061643e8fb commit 593e874e61249c845ca83e9284e4d9061643e8fb Author: Bojan Novković <bnovkov@FreeBSD.org> AuthorDate: 2024-12-15 14:02:13 +0000 Commit: Bojan Novković <bnovkov@FreeBSD.org> CommitDate: 2024-12-15 15:39:36 +0000 amd64: Add wrappers for XRSTORS and XSAVES Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D46984 --- sys/amd64/include/cpufunc.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/sys/amd64/include/cpufunc.h b/sys/amd64/include/cpufunc.h index ca53d73b0186..d180f5c76afb 100644 --- a/sys/amd64/include/cpufunc.h +++ b/sys/amd64/include/cpufunc.h @@ -942,6 +942,29 @@ sgx_eremove(void *epc) return (sgx_encls(SGX_EREMOVE, 0, (uint64_t)epc, 0)); } +static __inline void +xrstors(uint8_t *save_area, uint64_t state_bitmap) +{ + uint32_t low, hi; + + low = state_bitmap; + hi = state_bitmap >> 32; + __asm __volatile("xrstors %0" : : "m"(*save_area), "a"(low), + "d"(hi)); +} + +static __inline void +xsaves(uint8_t *save_area, uint64_t state_bitmap) +{ + uint32_t low, hi; + + low = state_bitmap; + hi = state_bitmap >> 32; + __asm __volatile("xsaves %0" : "=m"(*save_area) : "a"(low), + "d"(hi) + : "memory"); +} + void reset_dbregs(void); #ifdef _KERNEL
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