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From 7ff2ecfcd684bcf4865ceac786f1c6809d84d0aa Mon Sep 17 00:00:00 2001
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Message-Id: <7ff2ecfcd684bcf4865ceac786f1c6809d84d0aa@dist-git>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Fri, 21 Jun 2019 09:25:44 +0200
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Subject: [PATCH] virhostcpu: Make virHostCPUGetMSR() work only on x86
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Model specific registers are a thing only on x86. Also, the
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/dev/cpu/0/msr path exists only on Linux and the fallback
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mechanism (asking KVM) exists on Linux and FreeBSD only.
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Therefore, move the function within #ifdef that checks all
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aforementioned constraints and provide a dummy stub for all
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other cases.
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This fixes the build on my arm box, mingw-* builds, etc.
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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(cherry picked from commit ae3d812b006b84c6d06605868d19554ea0156392)
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https://bugzilla.redhat.com/show_bug.cgi?id=1697627
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Message-Id: <0f234c69059ad57462bb71d42983cdaedea26e78.1561068591.git.jdenemar@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/util/virhostcpu.c | 32 ++++++++++++++++++--------------
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1 file changed, 18 insertions(+), 14 deletions(-)
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diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c
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index d0c47faa18..aafa84c8e5 100644
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--- a/src/util/virhostcpu.c
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+++ b/src/util/virhostcpu.c
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@@ -1269,7 +1269,9 @@ virHostCPUGetMicrocodeVersion(void)
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#endif /* __linux__ */
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-#if HAVE_LINUX_KVM_H && defined(KVM_GET_MSRS)
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+#if HAVE_LINUX_KVM_H && defined(KVM_GET_MSRS) && \
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+ (defined(__i386__) || defined(__x86_64__)) && \
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+ (defined(__linux__) || defined(__FreeBSD__))
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static int
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virHostCPUGetMSRFromKVM(unsigned long index,
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uint64_t *result)
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@@ -1297,19 +1299,6 @@ virHostCPUGetMSRFromKVM(unsigned long index,
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return 0;
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}
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-#else
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-
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-static int
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-virHostCPUGetMSRFromKVM(unsigned long index ATTRIBUTE_UNUSED,
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- uint64_t *result ATTRIBUTE_UNUSED)
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-{
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- virReportSystemError(ENOSYS, "%s",
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- _("Reading MSRs via KVM is not supported on this platform"));
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- return -1;
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-}
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-#endif /* HAVE_LINUX_KVM_H && defined(KVM_GET_MSRS) */
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-
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-
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/*
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* Returns 0 on success,
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* 1 when the MSR is not supported by the host CPU,
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@@ -1346,3 +1335,18 @@ virHostCPUGetMSR(unsigned long index,
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return virHostCPUGetMSRFromKVM(index, msr);
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}
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+
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+#else
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+
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+int
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+virHostCPUGetMSR(unsigned long index ATTRIBUTE_UNUSED,
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+ uint64_t *msr ATTRIBUTE_UNUSED)
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+{
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+ virReportSystemError(ENOSYS, "%s",
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+ _("Reading MSRs is not supported on this platform"));
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+ return -1;
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+}
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+
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+#endif /* HAVE_LINUX_KVM_H && defined(KVM_GET_MSRS) && \
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+ (defined(__i386__) || defined(__x86_64__)) && \
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+ (defined(__linux__) || defined(__FreeBSD__)) */
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--
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2.22.0
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