From nobody Sun Feb 8 05:41:21 2026 Received: from mx.treblig.org (mx.treblig.org [46.235.229.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C61B27462; Mon, 3 Mar 2025 00:45:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.235.229.95 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740962702; cv=none; b=Wj2QW6xJosx9aopln3hO9KVBIyYMxxtp15myKjFdpuuc0UspWn9cfUbyzF+y3Shq7uUj7BbSmYzmaosLLgJtPxakgabOI8qy5AuWJBeyQMXjV4unuxKc+eGtwemQXLOXsZ9lcd5iUvwkMNhcq3ZFO0SIRj9vNYlIwj35Gza/f1E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740962702; c=relaxed/simple; bh=9WY/hzSH4v14e9UoCLK2v1IoOtJBktAuWSMTCZOu0sA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=L7lz/8ahGMqoeQx3HVV+JNOsRjY8e7+4M19rMdHnOGoOfCIzxpB2PMXPHG4IInuKENRNs7SAk+F7gybrCY/NXQLsIl2MnEzsCuiQoJaOqNwxTD7o84C/GsFkpp3aDkYtQhU574Hw0ik8kn5itKKb5043ZsYztTONA6lspVh+NgU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=treblig.org; spf=pass smtp.mailfrom=treblig.org; dkim=pass (2048-bit key) header.d=treblig.org header.i=@treblig.org header.b=LVN1QoDz; arc=none smtp.client-ip=46.235.229.95 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=treblig.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=treblig.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=treblig.org header.i=@treblig.org header.b="LVN1QoDz" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=treblig.org ; s=bytemarkmx; h=MIME-Version:Message-ID:Date:Subject:From:Content-Type:From :Subject; bh=J9CZvuUehL5MwrosRBDizgtQSpCUzvOD5nGdOU5im9Y=; b=LVN1QoDzKPBgLJrE r72TaAVorxjZV701wseKpp2x1JTvAguwxZuNf3+QryD+WhslREcyQ2/DX2Ld6A2Zx0gHRgnZ4sR98 3NoaEAlideQ/6VsW6Gy4OBtxa34XSXUrs5Xf/RhnP9qvCynSOiwWGkTpl4OL7BzVmYE5OtD7DNTJI mlSV8R17fzwhZ1Ea8JplVpklkKn+HmRD/+Lk+qJiIizM3CDrTf/8CymbLOdUfbhiV3TePOhzMebPk f8fCndVVCT4q0kFWduTKar5dewKjD9qx9bprxYcrRLSdQixnSTweqiMZihQWWk8RdKXSrAgFqQp48 bjGaaznIAne5WgXgSQ==; Received: from localhost ([127.0.0.1] helo=dalek.home.treblig.org) by mx.treblig.org with esmtp (Exim 4.96) (envelope-from ) id 1totvH-001zYn-2h; Mon, 03 Mar 2025 00:44:43 +0000 From: linux@treblig.org To: jgross@suse.com, ajay.kaher@broadcom.com, alexey.amakhalov@broadcom.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com Cc: x86@kernel.org, virtualization@lists.linux.dev, bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, "Dr. David Alan Gilbert" Subject: [PATCH v2] x86/paravirt: Remove unused paravirt_disable_iospace Date: Mon, 3 Mar 2025 00:44:41 +0000 Message-ID: <20250303004441.250451-1-linux@treblig.org> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" The last use of paravirt_disable_iospace() was removed in 2015 by commit d1c29465b8a5 ("lguest: don't disable iospace.") Remove it. Note the comment above it about 'entry.S' is unrelated to this but stayed when intervening code got deleted. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Juergen Gross --- v2 Cleaned up the header arch/x86/include/asm/paravirt_types.h | 2 -- arch/x86/kernel/paravirt.c | 20 -------------------- 2 files changed, 22 deletions(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/p= aravirt_types.h index fea56b04f436..3c54ac5a9af4 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -242,8 +242,6 @@ extern struct paravirt_patch_template pv_ops; =20 #define paravirt_ptr(op) [paravirt_opptr] "m" (pv_ops.op) =20 -int paravirt_disable_iospace(void); - /* This generates an indirect call based on the operation type number. */ #define PARAVIRT_CALL \ ANNOTATE_RETPOLINE_SAFE \ diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 1ccaa3397a67..debe92854774 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -90,26 +90,6 @@ void paravirt_set_sched_clock(u64 (*func)(void)) static_call_update(pv_sched_clock, func); } =20 -/* These are in entry.S */ -static struct resource reserve_ioports =3D { - .start =3D 0, - .end =3D IO_SPACE_LIMIT, - .name =3D "paravirt-ioport", - .flags =3D IORESOURCE_IO | IORESOURCE_BUSY, -}; - -/* - * Reserve the whole legacy IO space to prevent any legacy drivers - * from wasting time probing for their hardware. This is a fairly - * brute-force approach to disabling all non-virtual drivers. - * - * Note that this must be called very early to have any effect. - */ -int paravirt_disable_iospace(void) -{ - return request_resource(&ioport_resource, &reserve_ioports); -} - #ifdef CONFIG_PARAVIRT_XXL static noinstr void pv_native_write_cr2(unsigned long val) { --=20 2.48.1