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| author | Joao Martins <joao.m.martins@oracle.com> | 2018-06-13 09:55:44 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw@amazon.co.uk> | 2021-02-04 14:19:24 +0000 |
| commit | 79033bebf6fa3045bfa9bbe543c0eb7b43a0f4a3 (patch) | |
| tree | 7b1eebd8240021a79f43d43161f69667a1a72863 /arch/x86/kvm/x86.c | |
| parent | 23200b7a30de315d0e9a40663c905869d29d833c (diff) | |
| download | linux-79033bebf6fa3045bfa9bbe543c0eb7b43a0f4a3.tar.bz2 | |
KVM: x86/xen: Fix coexistence of Xen and Hyper-V hypercalls
Disambiguate Xen vs. Hyper-V calls by adding 'orl $0x80000000, %eax'
at the start of the Hyper-V hypercall page when Xen hypercalls are
also enabled.
That bit is reserved in the Hyper-V ABI, and those hypercall numbers
will never be used by Xen (because it does precisely the same trick).
Switch to using kvm_vcpu_write_guest() while we're at it, instead of
open-coding it.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Diffstat (limited to 'arch/x86/kvm/x86.c')
0 files changed, 0 insertions, 0 deletions