From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794063082; b=K6VwBX1ErxieSTtkkoRo7LO9vjSNJ6l4LQFabRBynVhelzChmslc2Z9QRl6Fbi80250Z Woo7Q+KmiyBgUCDN9JQuaPJ7+95QUtJ9riizfFoXbK7R8i74EOGlaopmLeqXfEGEvJPyo +fKGc7Q5YrgsMm5w2m2injlqJnatUrzSEN7Fs3yNvya2KngxH9Nfv1CAIdLumCPyz78ys bRP9JtKfPlOkJOhz1nMOYUvWnGnGnO4Yukq4Dikdn/+Cx799/6fGG4i6CNvvlFmBgnnJm 9O9TiD1dCiygSUI5ehNGzKc+jXd85otfDxLC9Zgn4QXp/Nwn7QEmO0DLVkClKS8dj3g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794063082; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=MHPlEtxEAyS7vmvIDuFxVfip0hbluHjvJKkRD8qxmu8=; b=N9wSPKDUlKDq6HVtPT3lkVN/auXnE32BsUyt8xi6a5BK1aNNOMNlaMndIvW4A8DYPwg2 u5lHjikPDMmWuFDzZoEf4vCHsZ/vCHGb7xJ6dhhNyakUdOmN6JYmPrMGzAKyUo/Qd4UnZ 0uHYX/XBqoMPym+qguxa/ngQppHQAahaQEGe94SE1roVXE/afTCVl8CCuIQ+apXcuQI5s MgoPA7+rWu70LItadpSt9EoQXtwDRFLlpyS6a+J7lBUlbHIQRTuhASYIFiP8MgupWkT/b jAM8Di5fgaCFkwGGr42ptpU1fHHevG68KWCgLRvl9d3jKKF8m/7CfbeIjBeZiRZhtJg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=kPl9gM2T; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D7296606D802; Sat, 7 Nov 2026 14:51:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=kPl9gM2T Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83CA71F0089F; Sat, 7 Nov 2026 14:51:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794063081; bh=MHPlEtxEAyS7vmvIDuFxVfip0hbluHjvJKkRD8qxmu8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kPl9gM2TtsU/c2FsPPoTOntMbShsVqM+BjfVC1LwlicUifCtERirDZ2nZsWx5vomE /P902aNydmJriGXJTBC4OWkYt0V0ORNTNRKGP6fooybzLCvcfl77+UF4AnX3O7woBG aVH5Zd+PZ//rzy4SJt2JOSMbqNtkXiegEYtzR2qg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vincent Donnefort , Fuad Tabba , Fuad Tabba , Marc Zyngier , Sasha Levin Subject: [PATCH 6.18 321/869] KVM: arm64: Fix MMFR0 TGRAN advertisement for pVMs Date: Sat, 7 Nov 2026 08:50:03 -0500 Message-ID: <20261107134903.359343755@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134852.069646174@linuxfoundation.org> References: <20261107134852.069646174@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vincent Donnefort [ Upstream commit 6c29285e78b5e4811145ebda382ac0ba732ce56a ] Protected VM ID register emulation leaves unlisted fields at 0. This creates two issues for TGRAN: * TGRAN16: 0 means non-implemented. It prevents 16KB protected VMs from booting even when the hardware supports it. * TGRAN4|TGRAN64: 0 means implemented. This may falsely advertise the feature even when the hardware does not support it. Advertise all the TGRAN fields in pvmid_aa64mmfr0 so that the hardware support is properly propagated. Cc: stable@vger.kernel.org Fixes: 6c30bfb18d0b ("KVM: arm64: Add handlers for protected VM System Registers") Signed-off-by: Vincent Donnefort Tested-by: Fuad Tabba Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Reviewed-by: Fuad Tabba Link: https://patch.msgid.link/20260928095454.3255918-2-vdonnefort@google.com Signed-off-by: Marc Zyngier Signed-off-by: Sasha Levin --- arch/arm64/kvm/hyp/nvhe/sys_regs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c index 3108b5185c204..168d473e084b4 100644 --- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c +++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c @@ -115,6 +115,9 @@ static const struct pvm_ftr_bits pvmid_aa64mmfr0[] = { MAX_FEAT(ID_AA64MMFR0_EL1, SNSMEM, IMP), MAX_FEAT(ID_AA64MMFR0_EL1, BIGENDEL0, IMP), MAX_FEAT(ID_AA64MMFR0_EL1, EXS, IMP), + MAX_FEAT(ID_AA64MMFR0_EL1, TGRAN4, IMP), + MAX_FEAT(ID_AA64MMFR0_EL1, TGRAN16, IMP), + MAX_FEAT(ID_AA64MMFR0_EL1, TGRAN64, IMP), FEAT_END }; -- 2.53.0