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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605017594; bh=JIJiOB88U7qGpDmmoxCMenpTc0s/h87h3MJM7Q4ZwqA=; h=From:To:Cc:Subject:Date:From; b=eevBjJdxE5ATVifFoMcdFwRvrDrdPcf5A4Uq/2knK9AMjrV+rWkfyxDhEH01yIWef 3klarVSpE4HXbH9ai0o4gTWeHp9jseRMkfwBjO6DSQaRxmLxSG8piSTXfX81nNjkn0 bj3yquDDsN6Py/6sLS8LytdTTa4yjRyN7GGPZc8U= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1kcUOW-009T8Q-Da; Tue, 10 Nov 2020 14:13:12 +0000 From: Marc Zyngier To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 0/3] KVM: arm64: Another set of CSV2-related fixes Date: Tue, 10 Nov 2020 14:13:05 +0000 Message-Id: <20201110141308.451654-1-maz@kernel.org> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, liangpeng10@huawei.com, will@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201110_091316_213107_961CEA3A X-CRM114-Status: GOOD ( 12.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Suzuki K Poulose , Will Deacon , Peng Liang , James Morse , kernel-team@android.com, Julien Thierry Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This small series addresses a couple of Spectre-v2 related issues: - Fix a live migration regression introduced with the setting of CSV2 on systems that are not affected by Spectre-v2, but that don't directly expose it in ID_AA64PFR0_EL1 - Inject an UNDEF exception if the guest tries to access any of SCXTNUM_ELx, as we don't advertise it to guests. Patches on top of 5.10-rc2. * From v1: - Only register a new value for CSV2 on a valid write to ID_AA64PFR0_EL1 - Delete even more code in patch #2 Marc Zyngier (3): KVM: arm64: Allow setting of ID_AA64PFR0_EL1.CSV2 from userspace KVM: arm64: Unify trap handlers injecting an UNDEF KVM: arm64: Handle SCXTNUM_ELx traps arch/arm64/include/asm/kvm_host.h | 2 + arch/arm64/include/asm/sysreg.h | 4 ++ arch/arm64/kvm/arm.c | 16 +++++ arch/arm64/kvm/sys_regs.c | 111 ++++++++++++++++++------------ 4 files changed, 89 insertions(+), 44 deletions(-)