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author | Sean Christopherson <seanjc@google.com> | 2021-11-04 21:22:39 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-08 11:04:38 +0300 |
commit | cc447c1e14825ccf609494b48022f0e09e94cc46 (patch) | |
tree | 351b2608735fbe9d40ce1b97fb85cbc41bbaf906 /drivers/net/ethernet/aquantia | |
parent | 60af14bf37ecc46e7a88de65e77c5798a2897264 (diff) | |
download | linux-cc447c1e14825ccf609494b48022f0e09e94cc46.tar.xz |
x86/hyperv: Move required MSRs check to initial platform probing
[ Upstream commit f3e613e72f66226b3bea1046c1b864f67a3000a4 ]
Explicitly check for MSR_HYPERCALL and MSR_VP_INDEX support when probing
for running as a Hyper-V guest instead of waiting until hyperv_init() to
detect the bogus configuration. Add messages to give the admin a heads
up that they are likely running on a broken virtual machine setup.
At best, silently disabling Hyper-V is confusing and difficult to debug,
e.g. the kernel _says_ it's using all these fancy Hyper-V features, but
always falls back to the native versions. At worst, the half baked setup
will crash/hang the kernel.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20211104182239.1302956-3-seanjc@google.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/aquantia')
0 files changed, 0 insertions, 0 deletions