linux-kernel - [PATCH v2 06/13] KVM: selftests: ensure ucall_shared

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Date:   Thu, 16 Dec 2021 11:13:51 -0600
From:   Michael Roth <michael.roth@....com>
To:     <linux-kselftest@...r.kernel.org>
CC:     <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <x86@...nel.org>, Nathan Tempelman <natet@...gle.com>,
        Marc Orr <marcorr@...gle.com>,
        "Steve Rutherford" <srutherford@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Mingwei Zhang <mizhang@...gle.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Varad Gautam <varad.gautam@...e.com>,
        Shuah Khan <shuah@...nel.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        "David Woodhouse" <dwmw@...zon.co.uk>,
        Ricardo Koller <ricarkol@...gle.com>,
        "Jim Mattson" <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "Borislav Petkov" <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Krish Sadhukhan <krish.sadhukhan@...cle.com>,
        Peter Gonda <pgonda@...gle.com>
Subject: [PATCH v2 06/13] KVM: selftests: ensure ucall_shared_alloc() allocates shared memory

Now that vm_vaddr_alloc() allocates encrypted/private guest memory by
default for confidential guests, ucall_shared_alloc() needs to be
switched over to using the new vm_vaddr_alloc_shared() function to
ensure that shared memory is used for the allocation.

Signed-off-by: Michael Roth <michael.roth@....com>
---
 tools/testing/selftests/kvm/lib/ucall_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c
index 8e5738241a7c..54c6c159dcd5 100644
--- a/tools/testing/selftests/kvm/lib/ucall_common.c
+++ b/tools/testing/selftests/kvm/lib/ucall_common.c
@@ -97,8 +97,8 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)
 /* Allocate shared memory within a guest to for a shared ucall buffer. */
 vm_vaddr_t ucall_shared_alloc(struct kvm_vm *vm, int count)
 {
-	return vm_vaddr_alloc(vm, count * sizeof(struct ucall),
-			      vm_get_page_size(vm));
+	return vm_vaddr_alloc_shared(vm, count * sizeof(struct ucall),
+				     vm_get_page_size(vm));
 }
 
 /*
-- 
2.25.1