linux-kernel - [PATCH v4 0/3] arm64/kvm: Fine grain _EL2 system registers list that affect nested virtualization

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Date:   Mon, 16 Oct 2023 11:17:39 +0000
From:   Miguel Luis <miguel.luis@...cle.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Eric Auger <eric.auger@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvmarm@...ts.linux.dev
Cc:     miguel.luis@...cle.com
Subject: [PATCH v4 0/3] arm64/kvm: Fine grain _EL2 system registers list that affect nested virtualization

The current HCR_EL2 description defines ranges of system register encodings in
which accesses should trap for NV. These ranges include encodings which aren't
defined in the reference manual. In order avoid this, let's rather implement a
more fine grained approach excluding those undefined.

v3 -> v4
 patch 2:
	Add BRBCR_EL2.
 patch 3:
	Handle BRBCR_EL2.
	Add Eric's R-b. Thanks!

v3: https://lore.kernel.org/kvmarm/20231011180103.91774-1-miguel.luis@oracle.com/
v2: https://lore.kernel.org/kvmarm/20230925162057.27548-1-miguel.luis@oracle.com/
v1: https://lore.kernel.org/kvmarm/20230913185209.32282-1-miguel.luis@oracle.com/

Miguel Luis (3):
  arm64: Add missing _EL12 encodings
  arm64: Add missing _EL2 encodings
  arm64/kvm: Fine grain _EL2 system registers list that affect nested
    virtualization

 arch/arm64/include/asm/sysreg.h | 50 ++++++++++++++++++
 arch/arm64/kvm/emulate-nested.c | 89 ++++++++++++++++++++++++++++++---
 2 files changed, 133 insertions(+), 6 deletions(-)

--
2.39.2