[PATCH 0/2] ARM64: Fixes for FEAT_E2H0 handling

From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	kvm@vger.kernel.org
Cc: James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oliver.upton@linux.dev>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Marek Szyprowski <m.szyprowski@samsung.com>
Subject: [PATCH 0/2] ARM64: Fixes for FEAT_E2H0 handling
Date: Mon, 12 Feb 2024 14:47:34 +0000	[thread overview]
Message-ID: <20240212144736.1933112-1-maz@kernel.org> (raw)

As the FEAT_E2H0 handling series has made it to -next, some of its
shortcomings are becoming apparent:

- A missing ID register in __read_sysreg_by_encoding() is causing CPU
  hotplug to explode (reported by Marek)

- NV1 is getting advertised on HW that doesn't have FEAT_NV, which is
  fairly harmless, but still annoying

These fixes should directly apply on the feat_e2h0 branch that Oliver
has pushed to kvmarm/next.

Marc Zyngier (2):
  arm64: cpufeatures: Add missing ID_AA64MMFR4_EL1 to
    __read_sysreg_by_encoding()
  arm64: cpufeatures: Only check for NV1 if NV is present

 arch/arm64/kernel/cpufeature.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

-- 
2.39.2