From patchwork Fri Aug 9 16:00:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Adalbert_Laz=C4=83r?= X-Patchwork-Id: 11087083 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 436086C5 for ; Fri, 9 Aug 2019 16:16:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 30CF01FF87 for ; Fri, 9 Aug 2019 16:16:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 251E320121; Fri, 9 Aug 2019 16:16:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7B101FF87 for ; Fri, 9 Aug 2019 16:15:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437248AbfHIQP7 (ORCPT ); Fri, 9 Aug 2019 12:15:59 -0400 Received: from mx01.bbu.dsd.mx.bitdefender.com ([91.199.104.161]:52862 "EHLO mx01.bbu.dsd.mx.bitdefender.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437114AbfHIQPG (ORCPT ); Fri, 9 Aug 2019 12:15:06 -0400 Received: from smtp.bitdefender.com (smtp02.buh.bitdefender.net [10.17.80.76]) by mx01.bbu.dsd.mx.bitdefender.com (Postfix) with ESMTPS id 90267305D367; Fri, 9 Aug 2019 19:01:43 +0300 (EEST) Received: from localhost.localdomain (unknown [89.136.169.210]) by smtp.bitdefender.com (Postfix) with ESMTPSA id 37A7F305B7A1; Fri, 9 Aug 2019 19:01:43 +0300 (EEST) From: =?utf-8?q?Adalbert_Laz=C4=83r?= To: kvm@vger.kernel.org Cc: linux-mm@kvack.org, virtualization@lists.linux-foundation.org, Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= , Konrad Rzeszutek Wilk , Tamas K Lengyel , Mathieu Tarral , =?utf-8?q?Samuel_Laur=C3=A9?= =?utf-8?q?n?= , Patrick Colp , Jan Kiszka , Stefan Hajnoczi , Weijiang Yang , Zhang@vger.kernel.org, Yu C , =?utf-8?q?Mihai_Don=C8=9Bu?= , =?utf-8?q?Adalbert_L?= =?utf-8?q?az=C4=83r?= Subject: [RFC PATCH v6 88/92] kvm: x86: emulate fst/fstp m64fp Date: Fri, 9 Aug 2019 19:00:43 +0300 Message-Id: <20190809160047.8319-89-alazar@bitdefender.com> In-Reply-To: <20190809160047.8319-1-alazar@bitdefender.com> References: <20190809160047.8319-1-alazar@bitdefender.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mihai Donțu This adds support for fst m64fp and fstp m64fp. Signed-off-by: Mihai Donțu Signed-off-by: Adalbert Lazăr --- arch/x86/kvm/emulate.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 14895c043edc..7261b94c6c00 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1178,6 +1178,26 @@ static int em_fnstsw(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static int em_fstp(struct x86_emulate_ctxt *ctxt) +{ + if (ctxt->ops->get_cr(ctxt, 0) & (X86_CR0_TS | X86_CR0_EM)) + return emulate_nm(ctxt); + + asm volatile("fstpl %0" : "=m"(ctxt->dst.val)); + + return X86EMUL_CONTINUE; +} + +static int em_fst(struct x86_emulate_ctxt *ctxt) +{ + if (ctxt->ops->get_cr(ctxt, 0) & (X86_CR0_TS | X86_CR0_EM)) + return emulate_nm(ctxt); + + asm volatile("fstl %0" : "=m"(ctxt->dst.val)); + + return X86EMUL_CONTINUE; +} + static int em_xorps(struct x86_emulate_ctxt *ctxt) { const sse128_t *src = &ctxt->src.vec_val; @@ -4678,7 +4698,8 @@ static const struct escape escape_db = { { } }; static const struct escape escape_dd = { { - N, N, N, N, N, N, N, I(DstMem16 | Mov, em_fnstsw), + N, N, I(DstMem64 | Mov, em_fst), I(DstMem64 | Mov, em_fstp), + N, N, N, I(DstMem16 | Mov, em_fnstsw), }, { /* 0xC0 - 0xC7 */ N, N, N, N, N, N, N, N,