From owner-svn-src-all@freebsd.org Fri Jan 11 02:08:08 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 08E1514A1861; Fri, 11 Jan 2019 02:08:08 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A325E83338; Fri, 11 Jan 2019 02:08:07 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7D3FCD07F; Fri, 11 Jan 2019 02:08:07 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x0B2879b010971; Fri, 11 Jan 2019 02:08:07 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x0B287sB010970; Fri, 11 Jan 2019 02:08:07 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201901110208.x0B287sB010970@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 11 Jan 2019 02:08:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r342926 - stable/12/sys/i386/include X-SVN-Group: stable-12 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/12/sys/i386/include X-SVN-Commit-Revision: 342926 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: A325E83338 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.95)[-0.950,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Jan 2019 02:08:08 -0000 Author: kib Date: Fri Jan 11 02:08:06 2019 New Revision: 342926 URL: https://svnweb.freebsd.org/changeset/base/342926 Log: MFC r342769, r342775: i386: Use atomic 64bit load to read PDE value from PAE pagetables in pmap_kextract(). Modified: stable/12/sys/i386/include/pmap.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/i386/include/pmap.h ============================================================================== --- stable/12/sys/i386/include/pmap.h Fri Jan 11 01:54:15 2019 (r342925) +++ stable/12/sys/i386/include/pmap.h Fri Jan 11 02:08:06 2019 (r342926) @@ -194,6 +194,8 @@ typedef uint32_t pt_entry_t; * Address of current address space page table maps and directories. */ #ifdef _KERNEL +#include + extern pt_entry_t PTmap[]; extern pd_entry_t PTD[]; extern pd_entry_t PTDpde[]; @@ -234,6 +236,32 @@ extern pd_entry_t *IdlePTD; /* physical address of "Id */ extern pt_entry_t *KPTmap; +#if (defined(PAE) || defined(PAE_TABLES)) + +#define pde_cmpset(pdep, old, new) atomic_cmpset_64_i586(pdep, old, new) +#define pte_load_store(ptep, pte) atomic_swap_64_i586(ptep, pte) +#define pte_load_clear(ptep) atomic_swap_64_i586(ptep, 0) +#define pte_store(ptep, pte) atomic_store_rel_64_i586(ptep, pte) +#define pte_load(ptep) atomic_load_acq_64_i586(ptep) + +extern pt_entry_t pg_nx; + +#else /* !(PAE || PAE_TABLES) */ + +#define pde_cmpset(pdep, old, new) atomic_cmpset_int(pdep, old, new) +#define pte_load_store(ptep, pte) atomic_swap_int(ptep, pte) +#define pte_load_clear(ptep) atomic_swap_int(ptep, 0) +#define pte_store(ptep, pte) do { \ + *(u_int *)(ptep) = (u_int)(pte); \ +} while (0) +#define pte_load(ptep) atomic_load_acq_int(ptep) + +#endif /* !(PAE || PAE_TABLES) */ + +#define pte_clear(ptep) pte_store(ptep, 0) + +#define pde_store(pdep, pde) pte_store(pdep, pde) + /* * Extract from the kernel page table the physical address that is mapped by * the given virtual address "va". @@ -245,7 +273,7 @@ pmap_kextract(vm_offset_t va) { vm_paddr_t pa; - if ((pa = PTD[va >> PDRSHIFT]) & PG_PS) { + if ((pa = pte_load(&PTD[va >> PDRSHIFT])) & PG_PS) { pa = (pa & PG_PS_FRAME) | (va & PDRMASK); } else { /* @@ -260,30 +288,6 @@ pmap_kextract(vm_offset_t va) } return (pa); } - -#if (defined(PAE) || defined(PAE_TABLES)) - -#define pde_cmpset(pdep, old, new) atomic_cmpset_64_i586(pdep, old, new) -#define pte_load_store(ptep, pte) atomic_swap_64_i586(ptep, pte) -#define pte_load_clear(ptep) atomic_swap_64_i586(ptep, 0) -#define pte_store(ptep, pte) atomic_store_rel_64_i586(ptep, pte) - -extern pt_entry_t pg_nx; - -#else /* !(PAE || PAE_TABLES) */ - -#define pde_cmpset(pdep, old, new) atomic_cmpset_int(pdep, old, new) -#define pte_load_store(ptep, pte) atomic_swap_int(ptep, pte) -#define pte_load_clear(ptep) atomic_swap_int(ptep, 0) -#define pte_store(ptep, pte) do { \ - *(u_int *)(ptep) = (u_int)(pte); \ -} while (0) - -#endif /* !(PAE || PAE_TABLES) */ - -#define pte_clear(ptep) pte_store(ptep, 0) - -#define pde_store(pdep, pde) pte_store(pdep, pde) #endif /* _KERNEL */