From nobody Mon Jun 1 16:36:45 2026 X-Original-To: dev-commits-src-main@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 4gTfk55QN4z6gJjK for ; Mon, 01 Jun 2026 16:36:45 +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 4gTfk54rxgz3vxg for ; Mon, 01 Jun 2026 16:36:45 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1780331805; 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=M6KYK2v/t9pLZ4MRncgagz7uL1mermPyAqOEq4qJkYakiVt7SCcp72DuubPl4ZSU49ge2e lFgb649WbV65dfybUoI80qJBELe/4Z9g1pkGV3t4W7XA5RmD/LCg2TpDKpiDBy9yN86xzL OxUpj+qeCqQK+FisaUiH95UCOxjB8sVNUfC7wXrd4Qc3q+uf3NUxRAgHVwQS71BMw/s162 SWQlWaQVzsU0p4Xq5NZR10OmY6jGPWvhuglxSlIAg8dg/do0SuCOXsjXXMlUd193jQLHbU Uo6K4hJFVyJwqhVKwrGei3nRFKwsQYYc/OivO0ADZYhlHwb9KSam939jKbe5zA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1780331805; a=rsa-sha256; cv=none; b=uVaj4DjOmTGZxUWV/Ou6l+O5ZrPlRBEuh+gXTw9olcOFdXTDanFsZiIMvLQ/FVOyIG6d0p Dt3rRc3D+wb7hA2kZUOPOQDuypKPZDUYsbO3Dq68TKu334un9D0JGW4aWVaI0hqWyuXXem zTikhmb0yb6w+ZqSzSaEErHdru7VtTAim0r6/pJJUsg9tOVr0903LdS5ZizNlY/M2JTFGD narySU/LMi7U7bvVvBbyH8PvMmXt3ci1nHQ/GAQylpmfFzVa4vHRFO4feM/GHTDdI3BAWY 83XYI2qHHWpKoTZKdIcdE/e5p63BVeaW3xFTXTHwvrF0UPro8Umw+gqS1dqv3w== 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=1780331805; 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=e5GggshCfytvblT25qHmJLNE2TBNWF29iZhFXs4P+7aKqIujORziqjikceRl1GM+6KRRbP lmXlgTmbnukGavYb9HqCd/lJhe1C3uJYZVWrZcbd2lVBCOr5LPu/YaieFeTiybM1TR1fCk eACeQTp+vGfvGTgSC+3Ols5+WFTcAsPn/sQ4bKDT4nIoU73ymcNQlTxN5N8Kg4FPfC4Oit 9fi4zOgbPqICSpcXNW9IOwiSDuwx3RktuBeDp7SoVrR+CMjdBqblNNP2yTeNokx5xU24Dr Hgfy3QWFIjbxgt1IkfF5ouek7SHGKjf2p5PU3yuTwGojYKJVI1s/adZr0/Vlkw== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4gTfk53z0Lzmhv for ; Mon, 01 Jun 2026 16:36:45 +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 the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@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