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Wed, 02 Jul 2025 18:17:36 +0100 Date: Wed, 02 Jul 2025 18:17:34 +0100 Message-ID: <86cyaibjgx.wl-maz@kernel.org> From: Marc Zyngier To: Yeoreum Yun Cc: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, oliver.upton@linux.dev, ardb@kernel.org, frederic@kernel.org, james.morse@arm.com, joey.gouly@arm.com, scott@os.amperecomputing.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 2/7] arm64/kvm: expose FEAT_LSUI to guest In-Reply-To: <20250617183635.1266015-3-yeoreum.yun@arm.com> References: <20250617183635.1266015-1-yeoreum.yun@arm.com> <20250617183635.1266015-3-yeoreum.yun@arm.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: yeoreum.yun@arm.com, catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, oliver.upton@linux.dev, ardb@kernel.org, frederic@kernel.org, james.morse@arm.com, joey.gouly@arm.com, scott@os.amperecomputing.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Tue, 17 Jun 2025 19:36:30 +0100, Yeoreum Yun wrote: > > expose FEAT_LSUI to guest. > > Signed-off-by: Yeoreum Yun > --- > arch/arm64/kvm/sys_regs.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c > index 76c2f0da821f..5c5a9c3ace2f 100644 > --- a/arch/arm64/kvm/sys_regs.c > +++ b/arch/arm64/kvm/sys_regs.c > @@ -1636,7 +1636,8 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu, > val &= ~ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_WFxT); > break; > case SYS_ID_AA64ISAR3_EL1: > - val &= ID_AA64ISAR3_EL1_FPRCVT | ID_AA64ISAR3_EL1_FAMINMAX; > + val &= ID_AA64ISAR3_EL1_FPRCVT | ID_AA64ISAR3_EL1_FAMINMAX | > + ID_AA64ISAR3_EL1_LSUI; > break; > case SYS_ID_AA64MMFR2_EL1: > val &= ~ID_AA64MMFR2_EL1_CCIDX_MASK; > @@ -2921,7 +2922,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { > ID_AA64ISAR2_EL1_APA3 | > ID_AA64ISAR2_EL1_GPA3)), > ID_WRITABLE(ID_AA64ISAR3_EL1, (ID_AA64ISAR3_EL1_FPRCVT | > - ID_AA64ISAR3_EL1_FAMINMAX)), > + ID_AA64ISAR3_EL1_FAMINMAX | ID_AA64ISAR3_EL1_LSUI)), > ID_UNALLOCATED(6,4), > ID_UNALLOCATED(6,5), > ID_UNALLOCATED(6,6), In the future, please Cc the relevant people and mailing lists. With $SUBJECT fixed to match the KVM/arm64 log, Acked-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.