linux-kernel - [RFC PATCH v2 0/9] KVM: Enable Nested Virt selftests

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Message-ID: <20250512105251.577874-1-gankulkarni@os.amperecomputing.com>
Date: Mon, 12 May 2025 03:52:42 -0700
From: Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>
To: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: maz@...nel.org,
	oliver.upton@...ux.dev,
	joey.gouly@....com,
	suzuki.poulose@....com,
	yuzenghui@...wei.com,
	seanjc@...gle.com,
	darren@...amperecomputing.com,
	gankulkarni@...amperecomputing.com
Subject: [RFC PATCH v2 0/9] KVM: Enable Nested Virt selftests

This patch series makes the selftest work with NV enabled. The guest code
is run in vEL2 instead of EL1. We add a command line option to enable
testing of NV. The NV tests are disabled by default.

Modified around 12 selftests in this series.

Changes since v1:
	- Updated NV helper functions as per comments [1].
	- Modified existing testscases to run guest code in vEL2.

[1] https://lkml.iu.edu/hypermail/linux/kernel/2502.0/07001.html 

Ganapatrao Kulkarni (9):
  KVM: arm64: nv: selftests: Add support to run guest code in vEL2.
  KVM: arm64: nv: selftests: Add simple test to run guest code in vEL2
  KVM: arm64: nv: selftests: Enable hypervisor timer tests to run in
    vEL2
  KVM: arm64: nv: selftests: enable aarch32_id_regs test to run in vEL2
  KVM: arm64: nv: selftests: Enable vgic tests to run in vEL2
  KVM: arm64: nv: selftests: Enable set_id_regs test to run in vEL2
  KVM: arm64: nv: selftests: Enable test to run in vEL2
  KVM: selftests: arm64: Extend kvm_page_table_test to run guest code in
    vEL2
  KVM: arm64: nv: selftests: Enable page_fault_test test to run in vEL2

 tools/testing/selftests/kvm/Makefile.kvm      |   2 +
 tools/testing/selftests/kvm/arch_timer.c      |   8 +-
 .../selftests/kvm/arm64/aarch32_id_regs.c     |  34 ++++-
 .../testing/selftests/kvm/arm64/arch_timer.c  | 118 +++++++++++++++---
 .../selftests/kvm/arm64/nv_guest_hypervisor.c |  68 ++++++++++
 .../selftests/kvm/arm64/page_fault_test.c     |  35 +++++-
 .../testing/selftests/kvm/arm64/set_id_regs.c |  57 ++++++++-
 tools/testing/selftests/kvm/arm64/vgic_init.c |  54 +++++++-
 tools/testing/selftests/kvm/arm64/vgic_irq.c  |  27 ++--
 .../selftests/kvm/arm64/vgic_lpi_stress.c     |  19 ++-
 .../testing/selftests/kvm/guest_print_test.c  |  32 +++++
 .../selftests/kvm/include/arm64/arch_timer.h  |  16 +++
 .../kvm/include/arm64/kvm_util_arch.h         |   3 +
 .../selftests/kvm/include/arm64/nv_util.h     |  45 +++++++
 .../selftests/kvm/include/arm64/vgic.h        |   1 +
 .../testing/selftests/kvm/include/kvm_util.h  |   3 +
 .../selftests/kvm/include/timer_test.h        |   1 +
 .../selftests/kvm/kvm_page_table_test.c       |  30 ++++-
 tools/testing/selftests/kvm/lib/arm64/nv.c    |  46 +++++++
 .../selftests/kvm/lib/arm64/processor.c       |  61 ++++++---
 tools/testing/selftests/kvm/lib/arm64/vgic.c  |   8 ++
 21 files changed, 604 insertions(+), 64 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/arm64/nv_guest_hypervisor.c
 create mode 100644 tools/testing/selftests/kvm/include/arm64/nv_util.h
 create mode 100644 tools/testing/selftests/kvm/lib/arm64/nv.c

-- 
2.48.1