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KVM: arm64: Extend pKVM page ownership selftests to cover guest donation

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

Tested-by: Fuad Tabba <tabba@google.com>
Tested-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260330144841.26181-34-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Will Deacon 2026-03-30 15:48:34 +01:00 committed by Marc Zyngier
parent 287c6981f1
commit c290df5278
1 changed files with 22 additions and 0 deletions
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22
arch/arm64/kvm/hyp/nvhe/mem_protect.c
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@ -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);