From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-174.mta0.migadu.com (out-174.mta0.migadu.com [91.218.175.174]) (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 95CFD1FA4 for ; Tue, 27 Aug 2024 00:23:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724718188; cv=none; b=EnG6C4kRvoNG0dmTZMYHcuqETZcCyuYktUR2+WfAbo0OXguMzay+gPsRluZMf+aU/V0xxELWe9SQdDPy4JIkI6oJaque9ZrWU2N9c+Phg9lKd+4j70vHUD7XzsGvrlqLQ2Iu4NA3sI+i0mlb+IC3YU7J4ai33fecVgvdNRnHGoU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724718188; c=relaxed/simple; bh=WDhOrRRXuWitSIjz07TpU7Vtx5+IJpBMs2WDMk5GAf8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tFRh9Osqnyy8qj6Wkp2Ce74Z44NkanM/Qv2BtxWxBQLfJ8a1q+hUj53TkS+8IlSAyskvkdNOJBxUfsDUmsaJDVHhbZjcste72WMKESi64hA0vI9at/n8DTcog4adKoyEbFSX6t2LNWNAX2kuPLyBQK6aWZZeEHhnlmoQcxHtwSA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=gAGdmnkC; arc=none smtp.client-ip=91.218.175.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="gAGdmnkC" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1724718183; h=from:from:reply-to:subject:subject: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=0ilFFD+yZkklP7EhMGtuomqJkl+9Tbk2Eb8pKKLekD4=; b=gAGdmnkC1+Ih4XZQv+v03CoAVC0Kdcgvq66EQuocgAbUnacL8TSu4uODV4ep542Rlxribz qGQeZ/7K9x0XFGXyY/Zx9Yy+cx9PC7PR1889eJxGtjElm2La/HccHRt5sChRxvkKD29b1E JtT6KFxEHunAZQhWiG5XBjnTCpFk50I= From: Oliver Upton To: kvmarm@lists.linux.dev Cc: Marc Zyngier , James Morse , Suzuki K Poulose , Zenghui Yu , Ganapatrao Kulkarni , Oliver Upton Subject: [PATCH v2 09/12] KVM: arm64: nv: Advertise support for FEAT_HPMN0 Date: Tue, 27 Aug 2024 00:22:32 +0000 Message-ID: <20240827002235.1753237-10-oliver.upton@linux.dev> In-Reply-To: <20240827002235.1753237-1-oliver.upton@linux.dev> References: <20240827002235.1753237-1-oliver.upton@linux.dev> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Everything is in place now for KVM to actually handle MDCR_EL2.HPMN. Not only that, the emulation is capable of doing FEAT_HPMN0. Advertise support for the feature in the VM's ID registers. Signed-off-by: Oliver Upton --- arch/arm64/kvm/nested.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c index de789e0f1ae9..206aff3d88f7 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -910,12 +910,13 @@ static void limit_nv_id_regs(struct kvm *kvm) ID_AA64MMFR4_EL1_E2H0_NI_NV1); kvm_set_vm_id_reg(kvm, SYS_ID_AA64MMFR4_EL1, val); - /* Only limited support for PMU, Debug, BPs and WPs */ + /* Only limited support for PMU, Debug, BPs, WPs, and HPMN0 */ val = kvm_read_vm_id_reg(kvm, SYS_ID_AA64DFR0_EL1); val &= (NV_FTR(DFR0, PMUVer) | NV_FTR(DFR0, WRPs) | NV_FTR(DFR0, BRPs) | - NV_FTR(DFR0, DebugVer)); + NV_FTR(DFR0, DebugVer) | + NV_FTR(DFR0, HPMN0)); /* Cap Debug to ARMv8.1 */ tmp = FIELD_GET(NV_FTR(DFR0, DebugVer), val); -- 2.46.0.295.g3b9ea8a38a-goog