From nobody Mon Jun 1 16:36:45 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4gTfkC0rX9z6gJjs for ; Mon, 01 Jun 2026 16:36:51 +0000 (UTC) (envelope-from git@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R13" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4gTfkC0DKwz3whl for ; Mon, 01 Jun 2026 16:36:51 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1780331811; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=UvO/xa+6ycCsD6Sj/q8GBvdwOWHPNkxAKXnU7BngerM=; b=dXRIkmYHKObuDH+zuyQ1zN2MlBNs4Mq5sD9edZcxFvsnk4a0HQp+1hIBi69blWbYYg+z7D tbk67ELHyAmfGyksnCr81T2noLKOvtrpjW8es50O1B1dZpEfT1plbBP95w9AJBlceSNmab LrdZpuGeNQGahkiTO5rRKAmcC1lMZdd2dXoNhn5aeCnnro4keX3ojRhwTgyp4AVeVXj8zr 59jU2tiwwyVnNkJiuxXldkyAyWzyAlYrAEAquJ7XiXwA18HKqMiuCyjeHbth3pWAAHqreU +3OiwEQdSfs3iRQDAKI7meG/xHA97kiFnyy4q3AC2HA4I0EUlXupeqE6YMvb2w== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1780331811; a=rsa-sha256; cv=none; b=kHG4j52KHPRkh87ap86+8Tw3WCuaD+OyG4rNJNalPNsmaE4l5vXyIFPOk52UmSEb7jopDZ jLDkTjRIEchSX9Y+dJD5Hmcd+fxq+GFqLN/ds6Y2I4BIF5vtWiMLBc5NgsreOgqheFavnD kofgNEd6xkPwVlDdNfZWqkXJFoqxTN9dnsRWm4f473WYg9Q3R31eYxjK0YTcOszDaONzLf H3SS5uT8nAYibhy2hVSCB20tcEB9sSiq4psHozBX6Q6vjZrkX8sUCOrE9xMxHdhCU/sTx3 ahApvMoHo06G+ndfhFqa9cVZ+OwqoSAchvxhZEtjgLrNsQIeNPS/HlOjZh81pw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1780331811; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=UvO/xa+6ycCsD6Sj/q8GBvdwOWHPNkxAKXnU7BngerM=; b=Hsp4vqTf31XALOVNOO8vJVK47jycAvLpQ+23FORIMvnphDjC4syO2wFy8BQoNAJlahBgT6 WsuE9m1iv7Dh7LM24X8sgkhXjqctIvHQuC5VvNORNP8Zyu1Y5odm22g7iAa4DhJ5/6dKvB aDIjYZh24NWd5RLriDK2algvECyHxCm201ZTaY01PEq1iMMCYjITIkDlS2Z/VixqpGG4Ap vsZ9jvWCWT84aDtwKlqGK2LSNwRue6teKf/p5pqLZMZ+5zoRYnDRWyRlRW18u7j3PpLdmE TediqRhTlrjQYlNdoY2m4toQA68TffWbMQjxKHGudAOOUK0O0AyeN5/Ln7tEMA== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4gTfkB5lb2zmmh for ; Mon, 01 Jun 2026 16:36:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 4490e by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Mon, 01 Jun 2026 16:36:45 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Konstantin Belousov Subject: git: 606d3cb1be5f - main - amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end() List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 606d3cb1be5fd594c1f51addd063e7c13e16bdbc Auto-Submitted: auto-generated Date: Mon, 01 Jun 2026 16:36:45 +0000 Message-Id: <6a1db51d.4490e.3ec61e36@gitrepo.freebsd.org> The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=606d3cb1be5fd594c1f51addd063e7c13e16bdbc commit 606d3cb1be5fd594c1f51addd063e7c13e16bdbc Author: Konstantin Belousov AuthorDate: 2026-05-29 07:32:41 +0000 Commit: Konstantin Belousov CommitDate: 2026-06-01 16:35:33 +0000 amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end() The memory where the pre-OS IDT was located might be already consumed by kernel. Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D57321 --- sys/amd64/amd64/machdep.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index 79bef08f8a64..ab9edfe2c68f 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -1827,7 +1827,6 @@ clear_pcb_flags(struct pcb *pcb, const u_int flags) } extern const char wrmsr_early_safe_gp_handler[]; -static struct region_descriptor wrmsr_early_safe_orig_efi_idt; void wrmsr_early_safe_start(void) @@ -1836,7 +1835,6 @@ wrmsr_early_safe_start(void) struct gate_descriptor *gpf_descr; int i; - sidt(&wrmsr_early_safe_orig_efi_idt); efi_idt.rd_limit = 32 * sizeof(idt0[0]); efi_idt.rd_base = (uintptr_t)idt0; lidt(&efi_idt); @@ -1857,12 +1855,6 @@ wrmsr_early_safe_start(void) void wrmsr_early_safe_end(void) { - int i; - - lidt(&wrmsr_early_safe_orig_efi_idt); - - for (i = 0; i < 32; i++) - memset_early(&idt0[i], 0, sizeof(idt0[0])); } int