From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29C37C5519F for ; Mon, 16 Nov 2020 15:23:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1F172137B for ; Mon, 16 Nov 2020 15:23:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=suse.com header.i=@suse.com header.b="P5pBiRTF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730403AbgKPPXN (ORCPT ); Mon, 16 Nov 2020 10:23:13 -0500 Received: from mx2.suse.de ([195.135.220.15]:54940 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729689AbgKPPXN (ORCPT ); Mon, 16 Nov 2020 10:23:13 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1605540191; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+maGdeQPC4RH2n2V3NwwaXjQr4W+CfjYAlItEcmIDY4=; b=P5pBiRTFGQ+/iPL2SQtyGj7AOxJmQA4mPncKLqxXXlqg8AORPjX4NQnYNaCuSEwjNsYGGz Jmli0nChGi6X6ipmcEcuBf26PvPxmBkpFq6nsLro4ZawosD9/KTnh5Fvu527601jcVpBiW EUs+Jt/cnHtIKrjXxTPsFnojse1bIe8= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 8F72BAF57; Mon, 16 Nov 2020 15:23:11 +0000 (UTC) From: Juergen Gross To: xen-devel@lists.xenproject.org, x86@kernel.org, linux-kernel@vger.kernel.org Cc: Juergen Gross , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Boris Ostrovsky , Stefano Stabellini Subject: [PATCH 2/4] x86/xen: use specific Xen pv interrupt entry for DF Date: Mon, 16 Nov 2020 16:22:59 +0100 Message-Id: <20201116152301.24558-3-jgross@suse.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201116152301.24558-1-jgross@suse.com> References: <20201116152301.24558-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Xen PV guests don't use IST. For double fault interrupts switch to the same model as NMI. Signed-off-by: Juergen Gross --- arch/x86/include/asm/idtentry.h | 3 +++ arch/x86/xen/enlighten_pv.c | 8 +++++++- arch/x86/xen/xen-asm.S | 2 +- 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index 3505c0396fa5..b35825392547 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -611,6 +611,9 @@ DECLARE_IDTENTRY_RAW(X86_TRAP_DB, xenpv_exc_debug); /* #DF */ DECLARE_IDTENTRY_DF(X86_TRAP_DF, exc_double_fault); +#ifdef CONFIG_XEN_PV +DECLARE_IDTENTRY_RAW_ERRORCODE(X86_TRAP_DF, xenpv_exc_double_fault); +#endif /* #VC */ #ifdef CONFIG_AMD_MEM_ENCRYPT diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 9f5e44c1f70a..803fbcb398c4 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -571,6 +571,12 @@ DEFINE_IDTENTRY_RAW(xenpv_exc_nmi) exc_nmi(regs); } +DEFINE_IDTENTRY_RAW_ERRORCODE(xenpv_exc_double_fault) +{ + /* On Xen PV, DF doesn't use IST. The C part is the sane as native. */ + exc_double_fault(regs, error_code); +} + DEFINE_IDTENTRY_RAW(xenpv_exc_debug) { /* @@ -615,7 +621,7 @@ struct trap_array_entry { static struct trap_array_entry trap_array[] = { TRAP_ENTRY_REDIR(exc_debug, true ), - TRAP_ENTRY(exc_double_fault, true ), + TRAP_ENTRY_REDIR(exc_double_fault, true ), #ifdef CONFIG_X86_MCE TRAP_ENTRY_REDIR(exc_machine_check, true ), #endif diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm.S index bc2586730a5b..1d054c915046 100644 --- a/arch/x86/xen/xen-asm.S +++ b/arch/x86/xen/xen-asm.S @@ -161,7 +161,7 @@ xen_pv_trap asm_exc_overflow xen_pv_trap asm_exc_bounds xen_pv_trap asm_exc_invalid_op xen_pv_trap asm_exc_device_not_available -xen_pv_trap asm_exc_double_fault +xen_pv_trap asm_xenpv_exc_double_fault xen_pv_trap asm_exc_coproc_segment_overrun xen_pv_trap asm_exc_invalid_tss xen_pv_trap asm_exc_segment_not_present -- 2.26.2