From nobody Thu Oct 9 13:23:08 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DF8802874E0 for ; Wed, 18 Jun 2025 09:30:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750239022; cv=none; b=r1cTsCL9NFymrkldNDpVXREDUFgVITdsEbA6x6JZ4BLbBXpPEYFy3AjUd+IWNZwy+DWMBEOhjfK005jnFXW+p/Irc6Y9o2qDUA4zdYnEqqveDFhKk3AJmtIP6ZOphjErR4sF9xYKvbUe5kJ6FEwoXP2yPUSu/+m/eOiz66yRD9g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750239022; c=relaxed/simple; bh=4k2LEfIzPWBG4ppJbbhrLU0DESX0vB4ItYaBtVsmIQQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AcqxbqKbUVkTA/HI7DlDliyh//EMnvpDVuKu2dlCW21LX5sPIPGzqjkGrsnKqb07Uv+U1cWHhgaVYssKQSWiGTacvY3d/Az8a7URNsPELXUzDt/oC00a+qX1nQSJwP2k5ZyHvGIcTCkv32/3Pe5cOc06Bcp/iTdLiBzPAbePH0Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A01151D34; Wed, 18 Jun 2025 02:29:59 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EA2303F58B; Wed, 18 Jun 2025 02:30:16 -0700 (PDT) From: Yeoreum Yun To: catalin.marinas@arm.com, pcc@google.com, will@kernel.org, broonie@kernel.org, anshuman.khandual@arm.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, frederic@kernel.org, hardevsinh.palaniya@siliconsignals.io, samuel.holland@sifive.com, palmer@rivosinc.com, charlie@rivosinc.com, thiago.bauermann@linaro.org, bgray@linux.ibm.com, tglx@linutronix.de, puranjay@kernel.org, david@redhat.com, yang@os.amperecomputing.com, mbenes@suse.cz, joel.granados@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Yeoreum Yun Subject: [PATCH v7 5/8] arm64/kvm: expose MTE_STORE_ONLY feature to guest Date: Wed, 18 Jun 2025 10:29:54 +0100 Message-Id: <20250618092957.2069907-6-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250618092957.2069907-1-yeoreum.yun@arm.com> References: <20250618092957.2069907-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" expose MTE_STORE_ONLY feature to guest. Signed-off-by: Yeoreum Yun --- arch/arm64/kvm/sys_regs.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index c8c92cb9da01..7bc99ed201eb 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1620,7 +1620,8 @@ static u64 __kvm_read_sanitised_id_reg(const struct k= vm_vcpu *vcpu, mask =3D ID_AA64PFR2_EL1_FPMR; =20 if (kvm_has_mte(vcpu->kvm)) - mask |=3D ID_AA64PFR2_EL1_MTEFAR; + mask |=3D ID_AA64PFR2_EL1_MTEFAR | + ID_AA64PFR2_EL1_MTESTOREONLY; =20 val &=3D mask; break; @@ -2884,7 +2885,8 @@ static const struct sys_reg_desc sys_reg_descs[] =3D { ID_AA64PFR1_EL1_MTE)), ID_WRITABLE(ID_AA64PFR2_EL1, ID_AA64PFR2_EL1_FPMR | - ID_AA64PFR2_EL1_MTEFAR), + ID_AA64PFR2_EL1_MTEFAR | + ID_AA64PFR2_EL1_MTESTOREONLY), ID_UNALLOCATED(4,3), ID_WRITABLE(ID_AA64ZFR0_EL1, ~ID_AA64ZFR0_EL1_RES0), ID_HIDDEN(ID_AA64SMFR0_EL1), --=20 LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}