linux-kernel - Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY

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Message-ID: <69ae0694-8ca3-402c-b864-99b500b24f5d@moroto.mountain>
Date: Thu, 25 Apr 2024 17:12:31 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Sean Christopherson <seanjc@...gle.com>, Shuah Khan <shuah@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Huacai Chen <chenhuacai@...nel.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Anup Patel <anup@...infault.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>, kvm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
	linux-mips@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>,
	Xu Yilun <yilun.xu@...el.com>,
	Chao Peng <chao.p.peng@...ux.intel.com>,
	Fuad Tabba <tabba@...gle.com>, Jarkko Sakkinen <jarkko@...nel.org>,
	Anish Moorthy <amoorthy@...gle.com>,
	David Matlack <dmatlack@...gle.com>,
	Yu Zhang <yu.c.zhang@...ux.intel.com>,
	Isaku Yamahata <isaku.yamahata@...el.com>,
	Mickaël Salaün <mic@...ikod.net>,
	Vlastimil Babka <vbabka@...e.cz>,
	Vishal Annapurve <vannapurve@...gle.com>,
	Ackerley Tng <ackerleytng@...gle.com>,
	Maciej Szmigiero <mail@...iej.szmigiero.name>,
	David Hildenbrand <david@...hat.com>,
	Quentin Perret <qperret@...gle.com>,
	Michael Roth <michael.roth@....com>, Wang <wei.w.wang@...el.com>,
	Liam Merwick <liam.merwick@...cle.com>,
	Isaku Yamahata <isaku.yamahata@...il.com>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
	Naresh Kamboju <naresh.kamboju@...aro.org>,
	Anders Roxell <anders.roxell@...aro.org>,
	Benjamin Copeland <ben.copeland@...aro.org>
Subject: Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to
 KVM_SET_USER_MEMORY_REGION2

On Fri, Oct 27, 2023 at 11:22:07AM -0700, Sean Christopherson wrote:
> Use KVM_SET_USER_MEMORY_REGION2 throughout KVM's selftests library so that
> support for guest private memory can be added without needing an entirely
> separate set of helpers.
> 
> Note, this obviously makes selftests backwards-incompatible with older KVM
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> versions from this point forward.
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Is there a way we could disable the tests on older kernels instead of
making them fail?  Check uname or something?  There is probably a
standard way to do this...  It's these tests which fail.

 kvm_aarch32_id_regs
 kvm_access_tracking_perf_test
 kvm_arch_timer
 kvm_debug-exceptions
 kvm_demand_paging_test
 kvm_dirty_log_perf_test
 kvm_dirty_log_test
 kvm_guest_print_test
 kvm_hypercalls
 kvm_kvm_page_table_test
 kvm_memslot_modification_stress_test
 kvm_memslot_perf_test
 kvm_page_fault_test
 kvm_psci_test
 kvm_rseq_test
 kvm_smccc_filter
 kvm_steal_time
 kvm_vgic_init
 kvm_vgic_irq
 kvm_vpmu_counter_access

regards,
dan carpenter