From patchwork Fri Mar 7 16:41:19 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Gao X-Patchwork-Id: 14006763 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 BB7442417D2; Fri, 7 Mar 2025 16:39:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741365555; cv=none; b=T9PHbTOZndwx370iKeuQZqtbWqAtgEEM+A2PUIJRbnZzAsFXQkE/uUAe9bn6/MJFmq79j7msiPGTJJp6OiTg0U/HobWaBUiza0PJ4Hbl8ug6s8Y4PrLP2CEYISUYrFIS3t4B0+YsIkRgONHgGfyU1Qhyl/BabU7myDHBPGAOdiE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741365555; c=relaxed/simple; bh=iditFzUC6gL9JXzaOkHqegaevIOWoBD7y+I1dZJrC64=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tPdnWdlu5K2X3jpFHo0MoWQCD+k3Jn1jcD6SNS2agmASw6/LFZ9dqFCrW+Prj3bI0sNEpqawf6VQ0URUDemdseGM5Cy2oURlmun0GVcS3yx4f0KAJwivD0MlIRd4UUtY9yiMJncx5YMjGj/88E0cXioX1MjFPv/LuRFTQJe5k0o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=gdg1Xoda; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="gdg1Xoda" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1741365554; x=1772901554; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=iditFzUC6gL9JXzaOkHqegaevIOWoBD7y+I1dZJrC64=; b=gdg1XodaQ38LQWdxG8aXDVhgU3V//Ji9ZRyB/LN4LnIEJx59ksbDKlte yXFCIzrD26efmH4Rj9O7YUuqythTF+VlUWvaO2Q0kC2IY33VN54cQDxtI HrC2bxqAK3sfpiDL4GTywXTaNwbJcAvxazM7YK2gogB0TlxYg0MxjxHuV bPvOimqPmVrL1jvLA99/oubxKD14YS5yxOpbZByiunq5uiRdfbTD60DtU Je76dzdhSsU54SVIduEMtB2pAHLE7v1e3YDIyTn1Z+aITuUgGxiBgen0R R/f+VPoIPi7G/UjLsBRoO7ffctEZLRdxH16Afgg8aIaNisjkYpRLzaXnF g==; X-CSE-ConnectionGUID: aDaPdInyQMyyjFjfo0Oeeg== X-CSE-MsgGUID: b2tpcNVZRly7om7vQvSh7g== X-IronPort-AV: E=McAfee;i="6700,10204,11365"; a="46344434" X-IronPort-AV: E=Sophos;i="6.14,229,1736841600"; d="scan'208";a="46344434" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2025 08:39:13 -0800 X-CSE-ConnectionGUID: 7mRywES9RzO0a0fC6dQIWA== X-CSE-MsgGUID: KMZxUO4pR02cbJak2aW5dw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,229,1736841600"; d="scan'208";a="124397979" Received: from spr.sh.intel.com ([10.239.53.19]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2025 08:39:10 -0800 From: Chao Gao To: chao.gao@intel.com, tglx@linutronix.de, dave.hansen@intel.com, x86@kernel.org, seanjc@google.com, pbonzini@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: peterz@infradead.org, rick.p.edgecombe@intel.com, weijiang.yang@intel.com, john.allen@amd.com, bp@alien8.de Subject: [PATCH v3 06/10] x86/fpu/xstate: Initialize guest perm with fpu_guest_cfg Date: Sat, 8 Mar 2025 00:41:19 +0800 Message-ID: <20250307164123.1613414-7-chao.gao@intel.com> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20250307164123.1613414-1-chao.gao@intel.com> References: <20250307164123.1613414-1-chao.gao@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Yang Weijiang Use the new fpu_guest_cfg to initialize guest permissions. Note fpu_guest_cfg and fpu_kernel_cfg remain the same for now. So there is no functional change. Signed-off-by: Yang Weijiang [Gao Chao: Extrace this from the previous patch ] Signed-off-by: Chao Gao --- arch/x86/kernel/fpu/core.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index b0c1ef40d105..d7ae684adbad 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -534,8 +534,15 @@ void fpstate_reset(struct fpu *fpu) fpu->perm.__state_perm = fpu_kernel_cfg.default_features; fpu->perm.__state_size = fpu_kernel_cfg.default_size; fpu->perm.__user_state_size = fpu_user_cfg.default_size; - /* Same defaults for guests */ - fpu->guest_perm = fpu->perm; + + /* Guest permission settings */ + fpu->guest_perm.__state_perm = fpu_guest_cfg.default_features; + fpu->guest_perm.__state_size = fpu_guest_cfg.default_size; + /* + * Set guest's __user_state_size to fpu_user_cfg.default_size so that + * existing uAPIs can still work. + */ + fpu->guest_perm.__user_state_size = fpu_user_cfg.default_size; } static inline void fpu_inherit_perms(struct fpu *dst_fpu)