From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08788606D831 for ; Mon, 9 Nov 2026 08:33:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=tiFYenFM; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=c7ZQEn84 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=LF0Ejm61SZQjc0f58igDHYvnGorLWUKIVR39Ms9bxQo=; b=tiFYenFM3MOWCB +6X9+GvZaZS3bRxY0JaY/2QhqG0vcHgHbMGE/x8N1/a5YyB5J3XImxlKdvEDtkBC9Xro+h5pAK3ZJ glfWfczHDs+3mzDbaoiVsCprkF1xi+kLsmCGB49OJolY2saqSV5XcflyqxibcAdABuy2sm9KD2FYX KDh642ZU9bqPmeYLmBF9j/s48PmqImpg8pl7g7yiLdnYnnyj7J03n32E7mWWSpBEEZZaTH68I6XZ6 meSOtVE+5lNng67If/iovFnxtp+06AQm2ktn5eIMRgiJ9/7Jf/SbreLXZKm/60l/Nahquku5SIUwr HRbI4t365boY2vrGIPSg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xQKoC-000000004Xt-3sRG; Mon, 09 Nov 2026 08:32:56 +0000 Received: from out-41.mta0.migadu.com ([2001:41d0:1004:224b::29] helo=mta0.migadu.com) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xQKo2-000000004N3-0rif for linux-arm-kernel@lists.infradead.org; Mon, 09 Nov 2026 08:32:48 +0000 X-Envelope-To: linux-arm-kernel@lists.infradead.org DKIM-Signature: a=rsa-sha256; bh=R5BdSBLcdM34a45EFlY1mo16mKvKHeF1lP9Vx+en0yQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794213164; v=1; x=1794817964; b=c7ZQEn846anLKcyzh+/HxcKvLUA6xYOP24jyL/eJjTjeZX7KrKAQHH3uN5gvzE7g2Rbu8A05 kbwFisq0r7ytJTZ8ZJQKGWc3hdmv9srq5En4kZkbHjNiqKzHtsE+ZdmZp1L9+LEOh3z0YJq6OA1 l7bVRdnP14Pk9TeWciO+Ny28= X-Envelope-To: linux-arm-kernel@lists.infradead.org Received: by smtp.migadu.com with ESMTPS id 889bac94e9d75174; Mon, 09 Nov 2026 08:32:44 +0000 X-Mizu-Trace-ID: 889bac94e9d75174 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Zenghui Yu , Steffen Eiden , Catalin Marinas , Will Deacon , Mark Rutland , Vincent Donnefort , Fuad Tabba , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 10/16] KVM: arm64: Advertise FPMR to protected VMs Date: Mon, 9 Nov 2026 08:31:59 +0000 Message-ID: <20261109083205.806619-11-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261109083205.806619-1-fuad.tabba@linux.dev> References: <20261109083205.806619-1-fuad.tabba@linux.dev> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261109_003247_568172_C56BDBC7 X-CRM114-Status: UNSURE ( 8.67 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Advertise FEAT_FPMR to protected VMs, and reset FPMR to 0 as KVM does for a non-protected vCPU. With the field set, vcpu_set_hcrx() sets HCRX_EL2.EnFPM for them, and FPMR is switched with the rest of the FP state. Signed-off-by: Fuad Tabba --- arch/arm64/kvm/hyp/nvhe/sys_regs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c index bcc35d6990e67..a937aad009348 100644 --- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c +++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c @@ -128,6 +128,7 @@ static const struct pvm_ftr_bits pvmid_aa64pfr1[] = { static const struct pvm_ftr_bits pvmid_aa64pfr2[] = { MAX_FEAT(ID_AA64PFR2_EL1, GCIE, NI), + MAX_FEAT(ID_AA64PFR2_EL1, FPMR, IMP), FEAT_END }; @@ -829,6 +830,7 @@ static const struct sys_reg_desc_reset pvm_sys_reg_reset_vals[] = { RESET_UNKNOWN(TTBR1_EL1), RESET_UNKNOWN(FAR_EL1), RESET_VAL(VBAR_EL1, 0x1de7ec7edbadc000ULL), + RESET_ZERO(FPMR), }; void kvm_reset_pvm_sys_regs(struct kvm_vcpu *vcpu) -- 2.47.3