linux-kernel - [PATCH v2 0/2] Fine grain sysregs allowed to trap for nested virtualization

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Message-Id: <20230925162057.27548-1-miguel.luis@oracle.com>
Date:   Mon, 25 Sep 2023 16:20:55 +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>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvmarm@...ts.linux.dev
Cc:     miguel.luis@...cle.com
Subject: [PATCH v2 0/2] Fine grain sysregs allowed to trap for nested virtualization

The current HCR_EL2 description includes _EL1 registers that are not affected
by NV. Let's exclude them from those ranges to implement a more fine grained
approach.

Changes v1 -> v2
 patch 1:
	fix indentation
 patch 2:
	improve commit message (Marc)
	fix indentation (Marc)
	follow kernel comment format (Marc)
	describe LRs in ranges (Marc)
	include AMEVCNTVOFF0<n>_EL2 and AMEVCNTVOFF1<n>_EL2
 patch 3:
	drop. Excluded IMPDEF range is trapped by HCR_EL2.TIDCP

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

Miguel Luis (2):
  arm64: Add missing _EL12 encodings
  arm64/kvm: Fine grain _EL2 system registers list that affect nested
    virtualization

 arch/arm64/include/asm/sysreg.h | 11 +++++++++
 arch/arm64/kvm/emulate-nested.c | 44 ++++++++++++++++++++++++++++-----
 2 files changed, 49 insertions(+), 6 deletions(-)

--
2.39.2