From nobody Thu Nov 21 20:53:21 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=reject dis=none) header.from=cloud.com ARC-Seal: i=1; a=rsa-sha256; t=1730130646; cv=none; d=zohomail.com; s=zohoarc; b=ikBVYT3V73flx72lu9AdUDHs2zSwtjBwyYFwOMIUL9A3h6aeKT8lCK7a8ms0nkY1qNLp0Xyp4cWmDwgGb7/IvUxwT8F6fsLsQp/NdxrlZwDATE1Siv1B3Ls1+xhlKY/c+lJY/2YsVhYJoQP6dcKpyD9mlgCcgOA/juq3xHUk9RM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1730130646; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=oF/zafBR21s51XQ55xrj7f7wP/qB8eTuRfs/webK9Bc=; b=V22V/1ETDBJj1uS1xxh2yvkg+TWN7XRls6nedRPvjYuGZm1PfUoYrSO1PcXRJNx4+nIGlS63HOrs3jCmByXyYF9UOplI+B2VIX7UgzPr3Y99rJskZ43LxgUbCaz+YvcIX5t5iY9fmMjVJ3n7SLF/TxDzMKs8rebqTDY2k4CffBI= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1730130646503693.5061671285532; Mon, 28 Oct 2024 08:50:46 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.826697.1241158 (Exim 4.92) (envelope-from ) id 1t5S0Y-0003pu-1P; Mon, 28 Oct 2024 15:50:18 +0000 Received: by outflank-mailman (output) from mailman id 826697.1241158; Mon, 28 Oct 2024 15:50:17 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1t5S0X-0003nf-LI; Mon, 28 Oct 2024 15:50:17 +0000 Received: by outflank-mailman (input) for mailman id 826697; Mon, 28 Oct 2024 15:50:16 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1t5S0W-0008FV-42 for xen-devel@lists.xenproject.org; Mon, 28 Oct 2024 15:50:16 +0000 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [2a00:1450:4864:20::636]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 50c7b84f-9544-11ef-99a3-01e77a169b0f; Mon, 28 Oct 2024 16:50:11 +0100 (CET) Received: by mail-ej1-x636.google.com with SMTP id a640c23a62f3a-a9a850270e2so737391466b.0 for ; Mon, 28 Oct 2024 08:50:11 -0700 (PDT) Received: from localhost.localdomain ([217.156.233.154]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9b3a0834a6sm387674066b.191.2024.10.28.08.50.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Oct 2024 08:50:10 -0700 (PDT) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 50c7b84f-9544-11ef-99a3-01e77a169b0f DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloud.com; s=cloud; t=1730130611; x=1730735411; darn=lists.xenproject.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=oF/zafBR21s51XQ55xrj7f7wP/qB8eTuRfs/webK9Bc=; b=f1cDNAWcjJX4J37+CTPWbXlYgvwX/Jz5sjH2B7yHzmXkRJgU3ENIiLy+se7hD4X/5f t9zzo//623V/MD3zrgzOxkWBokb/ivVlcZh6YRNNOppxpM3jNzlNR3N17YI2Ge+ksIut nFLh2yig6t4c+KXcsQDmuGECIrIOdvL85Qi3k= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730130611; x=1730735411; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=oF/zafBR21s51XQ55xrj7f7wP/qB8eTuRfs/webK9Bc=; b=Zhfx38xO15hlv9imHY7hnIx1hzHQ3c2F052vKj6E4NiRsyNm+dSzNm3j+0yAF7gW5G EJcqZPGl/WdA3V7FiCBSthw92ZzpwM0lC8fINJdV3MmkhTCb3pv+BGxMcq71+97pS//S /iV7ilzkVp9oRS186o0mr2XJFcHKUy9QpLpmFweP5ZVM3G4vW+mQSZp7+TRqPlIx58Il 5LHPrhO5oHuc5LQt7jD+WnHDcprog85N9BVo/Ki0nOa5tumZQrg1P8GVXxLPKNWKTwsh wQAYMdoF1kyzuDZuV2GS8mBRGJKDR8VrD/9lFgeSw+4i9PrUbp+VMYIl1m9mNUjKtaUJ lGUg== X-Gm-Message-State: AOJu0YxTLAf+7xwjjeSJ6gE8lTThIfWiFDN4DQ8oma0mBFUK3xvddnLC WtvNvVI2QDwiOcajB4ApCTf/mlcmRwpSMmgMK/dW+GnIuKStS+k7vVbuYImcHjslb2/VYZ9HyRS H X-Google-Smtp-Source: AGHT+IF3/bhrLgSOziE7SwxQmzzMAg6HWwkCFCduzdTekcWhgq6v2MAPrFNTaOqxjidfqXp1wB6P8Q== X-Received: by 2002:a17:906:f591:b0:a9a:9df:5581 with SMTP id a640c23a62f3a-a9de5ee8bacmr837394266b.38.1730130611065; Mon, 28 Oct 2024 08:50:11 -0700 (PDT) From: Alejandro Vallejo To: xen-devel@lists.xenproject.org Cc: Alejandro Vallejo , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH 13/14] x86/fpu: Pass explicit xsave areas to fpu_(f)xrstor() Date: Mon, 28 Oct 2024 15:49:31 +0000 Message-ID: <20241028154932.6797-14-alejandro.vallejo@cloud.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241028154932.6797-1-alejandro.vallejo@cloud.com> References: <20241028154932.6797-1-alejandro.vallejo@cloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @cloud.com) X-ZM-MESSAGEID: 1730130647453116600 Content-Type: text/plain; charset="utf-8" No functional change. Signed-off-by: Alejandro Vallejo --- xen/arch/x86/i387.c | 26 ++++++++++++++++---------- xen/arch/x86/include/asm/xstate.h | 2 +- xen/arch/x86/xstate.c | 10 ++++++---- 3 files changed, 23 insertions(+), 15 deletions(-) diff --git a/xen/arch/x86/i387.c b/xen/arch/x86/i387.c index 5950fbcf272e..7e1fb8ad8779 100644 --- a/xen/arch/x86/i387.c +++ b/xen/arch/x86/i387.c @@ -20,7 +20,8 @@ /* FPU Restore Functions */ /*******************************/ /* Restore x87 extended state */ -static inline void fpu_xrstor(struct vcpu *v, uint64_t mask) +static inline void fpu_xrstor(struct vcpu *v, struct xsave_struct *xsave_a= rea, + uint64_t mask) { bool ok; =20 @@ -31,16 +32,14 @@ static inline void fpu_xrstor(struct vcpu *v, uint64_t = mask) */ ok =3D set_xcr0(v->arch.xcr0_accum | XSTATE_FP_SSE); ASSERT(ok); - xrstor(v, mask); + xrstor(v, xsave_area, mask); ok =3D set_xcr0(v->arch.xcr0 ?: XSTATE_FP_SSE); ASSERT(ok); } =20 /* Restore x87 FPU, MMX, SSE and SSE2 state */ -static inline void fpu_fxrstor(struct vcpu *v) +static inline void fpu_fxrstor(struct vcpu *v, const fpusse_t *fpu_ctxt) { - const fpusse_t *fpu_ctxt =3D &v->arch.xsave_area->fpu_sse; - /* * Some CPUs don't save/restore FDP/FIP/FOP unless an exception * is pending. Clear the x87 state here by setting it to fixed @@ -197,6 +196,8 @@ static inline void fpu_fxsave(struct vcpu *v, fpusse_t = *fpu_ctxt) /* Restore FPU state whenever VCPU is schduled in. */ void vcpu_restore_fpu_nonlazy(struct vcpu *v, bool need_stts) { + struct xsave_struct *xsave_area; + /* Restore nonlazy extended state (i.e. parts not tracked by CR0.TS). = */ if ( !v->arch.fully_eager_fpu && !v->arch.nonlazy_xstate_used ) goto maybe_stts; @@ -211,12 +212,13 @@ void vcpu_restore_fpu_nonlazy(struct vcpu *v, bool ne= ed_stts) * above) we also need to restore full state, to prevent subsequently * saving state belonging to another vCPU. */ + xsave_area =3D vcpu_map_xsave_area(v); if ( v->arch.fully_eager_fpu || xstate_all(v) ) { if ( cpu_has_xsave ) - fpu_xrstor(v, XSTATE_ALL); + fpu_xrstor(v, xsave_area, XSTATE_ALL); else - fpu_fxrstor(v); + fpu_fxrstor(v, &xsave_area->fpu_sse); =20 v->fpu_initialised =3D 1; v->fpu_dirtied =3D 1; @@ -226,9 +228,10 @@ void vcpu_restore_fpu_nonlazy(struct vcpu *v, bool nee= d_stts) } else { - fpu_xrstor(v, XSTATE_NONLAZY); + fpu_xrstor(v, xsave_area, XSTATE_NONLAZY); need_stts =3D true; } + vcpu_unmap_xsave_area(v, xsave_area); =20 maybe_stts: if ( need_stts ) @@ -240,6 +243,7 @@ void vcpu_restore_fpu_nonlazy(struct vcpu *v, bool need= _stts) */ void vcpu_restore_fpu_lazy(struct vcpu *v) { + struct xsave_struct *xsave_area; ASSERT(!is_idle_vcpu(v)); =20 /* Avoid recursion. */ @@ -250,10 +254,12 @@ void vcpu_restore_fpu_lazy(struct vcpu *v) =20 ASSERT(!v->arch.fully_eager_fpu); =20 + xsave_area =3D vcpu_map_xsave_area(v); if ( cpu_has_xsave ) - fpu_xrstor(v, XSTATE_LAZY); + fpu_xrstor(v, xsave_area, XSTATE_LAZY); else - fpu_fxrstor(v); + fpu_fxrstor(v, &xsave_area->fpu_sse); + vcpu_unmap_xsave_area(v, xsave_area); =20 v->fpu_initialised =3D 1; v->fpu_dirtied =3D 1; diff --git a/xen/arch/x86/include/asm/xstate.h b/xen/arch/x86/include/asm/x= state.h index 104fe0d44173..43f7731c2b17 100644 --- a/xen/arch/x86/include/asm/xstate.h +++ b/xen/arch/x86/include/asm/xstate.h @@ -98,7 +98,7 @@ void set_msr_xss(u64 xss); uint64_t get_msr_xss(void); uint64_t read_bndcfgu(void); void xsave(struct vcpu *v, struct xsave_struct *ptr, uint64_t mask); -void xrstor(struct vcpu *v, uint64_t mask); +void xrstor(struct vcpu *v, struct xsave_struct *ptr, uint64_t mask); void xstate_set_init(uint64_t mask); bool xsave_enabled(const struct vcpu *v); int __must_check validate_xstate(const struct domain *d, diff --git a/xen/arch/x86/xstate.c b/xen/arch/x86/xstate.c index 518388e6e272..aa5c062f7e51 100644 --- a/xen/arch/x86/xstate.c +++ b/xen/arch/x86/xstate.c @@ -374,11 +374,10 @@ void xsave(struct vcpu *v, struct xsave_struct *ptr, = uint64_t mask) ptr->fpu_sse.x[FPU_WORD_SIZE_OFFSET] =3D fip_width; } =20 -void xrstor(struct vcpu *v, uint64_t mask) +void xrstor(struct vcpu *v, struct xsave_struct *ptr, uint64_t mask) { uint32_t hmask =3D mask >> 32; uint32_t lmask =3D mask; - struct xsave_struct *ptr =3D v->arch.xsave_area; unsigned int faults, prev_faults; =20 /* @@ -992,6 +991,7 @@ int handle_xsetbv(u32 index, u64 new_bv) mask &=3D curr->fpu_dirtied ? ~XSTATE_FP_SSE : XSTATE_NONLAZY; if ( mask ) { + struct xsave_struct *xsave_area =3D vcpu_map_xsave_area(curr); unsigned long cr0 =3D read_cr0(); =20 clts(); @@ -1010,7 +1010,9 @@ int handle_xsetbv(u32 index, u64 new_bv) curr->fpu_dirtied =3D 1; cr0 &=3D ~X86_CR0_TS; } - xrstor(curr, mask); + xrstor(curr, xsave_area, mask); + vcpu_unmap_xsave_area(curr, xsave_area); + if ( cr0 & X86_CR0_TS ) write_cr0(cr0); } @@ -1080,7 +1082,7 @@ void xstate_set_init(uint64_t mask) =20 xstate =3D vcpu_map_xsave_area(v); memset(&xstate->xsave_hdr, 0, sizeof(xstate->xsave_hdr)); - xrstor(v, mask); + xrstor(v, xstate, mask); vcpu_unmap_xsave_area(v, xstate); =20 if ( cr0 & X86_CR0_TS ) --=20 2.47.0