Commit c290df52 authored by Will Deacon's avatar Will Deacon Committed by Marc Zyngier
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KVM: arm64: Extend pKVM page ownership selftests to cover guest donation 



Extend the pKVM page ownership selftests to donate and reclaim a page
to/from a guest.

Tested-by: default avatarFuad Tabba <tabba@google.com>
Tested-by: default avatarMostafa Saleh <smostafa@google.com>
Signed-off-by: default avatarWill Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260330144841.26181-34-will@kernel.org


Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 287c6981

arch/arm64/kvm/hyp/nvhe/mem_protect.c

+22 −0
Original line number Diff line number Diff line
@@ -1751,6 +1751,7 @@ void pkvm_ownership_selftest(void *base) 
	assert_transition_res(-EPERM,	hyp_pin_shared_mem, virt, virt + size);

	assert_transition_res(-EPERM,	__pkvm_host_share_guest, pfn, gfn, 1, vcpu, prot);

	assert_transition_res(-ENOENT,	__pkvm_host_unshare_guest, gfn, 1, vm);

	assert_transition_res(-EPERM,   __pkvm_host_donate_guest, pfn, gfn, vcpu);



	selftest_state.host = PKVM_PAGE_OWNED;

	selftest_state.hyp = PKVM_NOPAGE;
@@ -1770,6 +1771,7 @@ void pkvm_ownership_selftest(void *base) 
	assert_transition_res(-EPERM,	__pkvm_hyp_donate_host, pfn, 1);

	assert_transition_res(-EPERM,	__pkvm_host_share_guest, pfn, gfn, 1, vcpu, prot);

	assert_transition_res(-ENOENT,	__pkvm_host_unshare_guest, gfn, 1, vm);

	assert_transition_res(-EPERM,   __pkvm_host_donate_guest, pfn, gfn, vcpu);



	assert_transition_res(0,	hyp_pin_shared_mem, virt, virt + size);

	assert_transition_res(0,	hyp_pin_shared_mem, virt, virt + size);
@@ -1782,6 +1784,7 @@ void pkvm_ownership_selftest(void *base) 
	assert_transition_res(-EPERM,	__pkvm_hyp_donate_host, pfn, 1);

	assert_transition_res(-EPERM,	__pkvm_host_share_guest, pfn, gfn, 1, vcpu, prot);

	assert_transition_res(-ENOENT,	__pkvm_host_unshare_guest, gfn, 1, vm);

	assert_transition_res(-EPERM,   __pkvm_host_donate_guest, pfn, gfn, vcpu);



	hyp_unpin_shared_mem(virt, virt + size);

	assert_page_state();
@@ -1801,6 +1804,7 @@ void pkvm_ownership_selftest(void *base) 
	assert_transition_res(-EPERM,	__pkvm_hyp_donate_host, pfn, 1);

	assert_transition_res(-EPERM,	__pkvm_host_share_guest, pfn, gfn, 1, vcpu, prot);

	assert_transition_res(-ENOENT,	__pkvm_host_unshare_guest, gfn, 1, vm);

	assert_transition_res(-EPERM,   __pkvm_host_donate_guest, pfn, gfn, vcpu);

	assert_transition_res(-EPERM,	hyp_pin_shared_mem, virt, virt + size);



	selftest_state.host = PKVM_PAGE_OWNED;
@@ -1817,6 +1821,7 @@ void pkvm_ownership_selftest(void *base) 
	assert_transition_res(-EPERM,	__pkvm_host_share_hyp, pfn);

	assert_transition_res(-EPERM,	__pkvm_host_unshare_hyp, pfn);

	assert_transition_res(-EPERM,	__pkvm_hyp_donate_host, pfn, 1);

	assert_transition_res(-EPERM,   __pkvm_host_donate_guest, pfn, gfn, vcpu);

	assert_transition_res(-EPERM,	hyp_pin_shared_mem, virt, virt + size);



	selftest_state.guest[1] = PKVM_PAGE_SHARED_BORROWED;
@@ -1830,6 +1835,23 @@ void pkvm_ownership_selftest(void *base) 
	selftest_state.host = PKVM_PAGE_OWNED;

	assert_transition_res(0,	__pkvm_host_unshare_guest, gfn + 1, 1, vm);



	selftest_state.host = PKVM_NOPAGE;

	selftest_state.guest[0] = PKVM_PAGE_OWNED;

	assert_transition_res(0,	__pkvm_host_donate_guest, pfn, gfn, vcpu);

	assert_transition_res(-EPERM,	__pkvm_host_donate_guest, pfn, gfn, vcpu);

	assert_transition_res(-EPERM,	__pkvm_host_donate_guest, pfn, gfn + 1, vcpu);

	assert_transition_res(-EPERM,	__pkvm_host_share_guest, pfn, gfn, 1, vcpu, prot);

	assert_transition_res(-EPERM,	__pkvm_host_share_guest, pfn, gfn + 1, 1, vcpu, prot);

	assert_transition_res(-EPERM,	__pkvm_host_share_ffa, pfn, 1);

	assert_transition_res(-EPERM,	__pkvm_host_donate_hyp, pfn, 1);

	assert_transition_res(-EPERM,	__pkvm_host_share_hyp, pfn);

	assert_transition_res(-EPERM,	__pkvm_host_unshare_hyp, pfn);

	assert_transition_res(-EPERM,	__pkvm_hyp_donate_host, pfn, 1);



	selftest_state.host = PKVM_PAGE_OWNED;

	selftest_state.guest[0] = PKVM_NOPAGE;

	assert_transition_res(0,	__pkvm_host_reclaim_page_guest, gfn, vm);



	selftest_state.host = PKVM_NOPAGE;

	selftest_state.hyp = PKVM_PAGE_OWNED;

	assert_transition_res(0,	__pkvm_host_donate_hyp, pfn, 1);