Joao Martins 79033bebf6 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>
2021-02-04 14:19:24 +00:00
..
2020-08-22 10:53:12 +01:00
2020-12-22 14:02:39 -08:00
2020-08-19 14:11:44 +02:00
2020-09-04 12:46:06 +01:00