linux-kernel - [PATCH v1 09/13] KVM: selftests: Add va_start/end into uffd

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Message-ID: <20241204191349.1730936-10-jthoughton@google.com>
Date: Wed,  4 Dec 2024 19:13:44 +0000
From: James Houghton <jthoughton@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <seanjc@...gle.com>
Cc: Jonathan Corbet <corbet@....net>, Marc Zyngier <maz@...nel.org>, 
	Oliver Upton <oliver.upton@...ux.dev>, Yan Zhao <yan.y.zhao@...el.com>, 
	James Houghton <jthoughton@...gle.com>, Nikita Kalyazin <kalyazin@...zon.com>, 
	Anish Moorthy <amoorthy@...gle.com>, Peter Gonda <pgonda@...gle.com>, Peter Xu <peterx@...hat.com>, 
	David Matlack <dmatlack@...gle.com>, Wang@...gle.com, Wei W <wei.w.wang@...el.com>, 
	kvm@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev
Subject: [PATCH v1 09/13] KVM: selftests: Add va_start/end into uffd_desc

This will be used for the self-test to look up which userfaultfd we
should be using when handling a KVM Userfault (in the event KVM
Userfault and userfaultfd are being used together).

Signed-off-by: James Houghton <jthoughton@...gle.com>
---
 tools/testing/selftests/kvm/include/userfaultfd_util.h | 2 ++
 tools/testing/selftests/kvm/lib/userfaultfd_util.c     | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
index 60f7f9d435dc..b62fecdfe745 100644
--- a/tools/testing/selftests/kvm/include/userfaultfd_util.h
+++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
@@ -30,6 +30,8 @@ struct uffd_desc {
 	int *pipefds;
 	pthread_t *readers;
 	struct uffd_reader_args *reader_args;
+	void *va_start;
+	void *va_end;
 };
 
 struct uffd_desc *uffd_setup_demand_paging(int uffd_mode, useconds_t delay,
diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
index 7c9de8414462..93004c85bcdc 100644
--- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
+++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
@@ -152,6 +152,8 @@ struct uffd_desc *uffd_setup_demand_paging(int uffd_mode, useconds_t delay,
 		    expected_ioctls, "missing userfaultfd ioctls");
 
 	uffd_desc->uffd = uffd;
+	uffd_desc->va_start = hva;
+	uffd_desc->va_end = (char *)hva + len;
 	for (i = 0; i < uffd_desc->num_readers; ++i) {
 		int pipes[2];
 
-- 
2.47.0.338.g60cca15819-goog