From: Vishal Annapurve <vannapurve@google.com>
To: x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: pbonzini@redhat.com, vkuznets@redhat.com, wanpengli@tencent.com,
jmattson@google.com, joro@8bytes.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
hpa@zytor.com, shauh@kernel.org, yang.zhong@intel.com,
drjones@redhat.com, ricarkol@google.com, aaronlewis@google.com,
wei.w.wang@intel.com, kirill.shutemov@linux.intel.com,
corbet@lwn.net, hughd@google.com, jlayton@kernel.org,
bfields@fieldses.org, akpm@linux-foundation.org,
chao.p.peng@linux.intel.com, yu.c.zhang@linux.intel.com,
jun.nakajima@intel.com, dave.hansen@intel.com,
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ak@linux.intel.com, david@redhat.com, luto@kernel.org,
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pgonda@google.com, seanjc@google.com, diviness@google.com,
Vishal Annapurve <vannapurve@google.com>
Subject: [RFC V1 PATCH 2/5] selftests: kvm: Fix inline assembly for hypercall
Date: Fri, 8 Apr 2022 21:05:42 +0000 [thread overview]
Message-ID: <20220408210545.3915712-3-vannapurve@google.com> (raw)
In-Reply-To: <20220408210545.3915712-1-vannapurve@google.com>
Fix inline assembly for hypercall to explicitly set
eax with hypercall number to allow the implementation
to work even in cases where compiler would inline the
function.
Signed-off-by: Vishal Annapurve <vannapurve@google.com>
---
tools/testing/selftests/kvm/lib/x86_64/processor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 9f000dfb5594..4d88e1a553bf 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1461,7 +1461,7 @@ uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2,
asm volatile("vmcall"
: "=a"(r)
- : "b"(a0), "c"(a1), "d"(a2), "S"(a3));
+ : "a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3));
return r;
}
--
2.35.1.1178.g4f1659d476-goog
next prev parent reply other threads:[~2022-04-08 21:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-08 21:05 [RFC V1 PATCH 0/5] selftests: KVM: selftests for fd-based approach of supporting private memory Vishal Annapurve
2022-04-08 21:05 ` [RFC V1 PATCH 1/5] x86: kvm: HACK: Allow testing of priv memfd approach Vishal Annapurve
2022-04-08 21:05 ` Vishal Annapurve [this message]
2022-04-08 21:05 ` [RFC V1 PATCH 3/5] selftests: kvm: Add a basic selftest to test private memory Vishal Annapurve
2022-04-08 21:05 ` [RFC V1 PATCH 4/5] selftests: kvm: priv_memfd_test: Add support for memory conversion Vishal Annapurve
2022-04-08 21:05 ` [RFC V1 PATCH 5/5] selftests: kvm: priv_memfd_test: Add shared access test Vishal Annapurve
2022-04-11 12:01 ` [RFC V1 PATCH 0/5] selftests: KVM: selftests for fd-based approach of supporting private memory Nikunj A. Dadhania
2022-04-12 8:25 ` Chao Peng
2022-04-13 0:16 ` Andy Lutomirski
2022-04-13 13:42 ` Michael Roth
2022-04-14 10:07 ` Chao Peng
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