From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5410F33711E for ; Mon, 5 Jan 2026 15:51:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767628278; cv=none; b=CdOFN5ZGSbgtdNgWAUFBoz2NqjodrU2D0MJrZW1Ba6d5nmUz/+Yk6Pfp3O+zEIY9PVSAKHAHmDdXn9hOYgcBERZYnTjRhTZ9qnkoTgJFv1S0/qwUUZYXJhxTO4XTIkBPSYcYUzJIcA3yjNd+aDOjjjkEXxcWeTkpfPLcZFkFytY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767628278; c=relaxed/simple; bh=oae1gOD9h+bRUmiV4brKcILcJgRGoexLydgjOCkXoJo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fdhIV/ZxHHxrGy/aqeqT773XPYgH+X89Mj3lSr/ah8W+44XV8e65Wrer2J/fT65m7lGqrdYBsjMjR/gTAUgPe+I3iTOg9qKpu9ttCcr1VCmtSkMl1VOJOvsAc37mfvtD9ExYuwVpZEZbgYGIl+ei60koEQSl1faSbGnpLKBavs4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AOBfkw8o; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AOBfkw8o" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7C051C116D0; Mon, 5 Jan 2026 15:51:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767628277; bh=oae1gOD9h+bRUmiV4brKcILcJgRGoexLydgjOCkXoJo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AOBfkw8ozR2r3AVQ627mXmaokduhCawUQbH0a+5bfAXrix8zLSjEpoEPE07HoeAFy bNSIzPIQ5w+lcroBUXi5Bvy68OBFSblepuDaSLJbMOsabjM/pywS4shYfpnJ6vQ1de xLPGPDoyIzLApT5gvRLZkhIyVB/QGU8RpZ/rp47rjct1bWRCKNq2MOhNhow0+Lipgi d2UsBQW0fKMsN6/xEFjBwcxWID54GiaJT0VTMaMWfaeJ9IZcP/3nIsOpyc9lYNUg2v ZTlgRhP5tD8Smj7iRTPYcMb6309hD0BSgpvsPDMN+3ambGhOZncTJQB3NcU3UfQCiG cl4I6YbMLO0Bw== From: Will Deacon To: kvmarm@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org, Will Deacon , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Quentin Perret , Fuad Tabba , Vincent Donnefort , Mostafa Saleh Subject: [PATCH 28/30] KVM: arm64: Extend pKVM page ownership selftests to cover guest donation Date: Mon, 5 Jan 2026 15:49:36 +0000 Message-ID: <20260105154939.11041-29-will@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260105154939.11041-1-will@kernel.org> References: <20260105154939.11041-1-will@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Extend the pKVM page ownership selftests to donate and reclaim a page to/from a guest. Signed-off-by: Will Deacon --- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index c1600b88c316..a586ca922258 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -1712,6 +1712,7 @@ 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; @@ -1731,6 +1732,7 @@ 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); @@ -1743,6 +1745,7 @@ 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(); @@ -1762,6 +1765,7 @@ 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; @@ -1778,6 +1782,7 @@ 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; @@ -1791,6 +1796,23 @@ 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); -- 2.52.0.351.gbe84eed79e-goog