diff options
| author | Wei Liu <wei.liu@kernel.org> | 2021-02-03 16:04:24 +0100 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-02-11 09:47:06 +0100 |
| commit | 5d0f077e0f413b7eca827b16ea8bfc4569e3946c (patch) | |
| tree | d232e1a9f50e9a855250d21abe54514c98011f22 /arch/x86/include/asm/mshyperv.h | |
| parent | clocksource/hyperv: use MSR-based access if running as root (diff) | |
| download | linux-5d0f077e0f413b7eca827b16ea8bfc4569e3946c.tar.xz linux-5d0f077e0f413b7eca827b16ea8bfc4569e3946c.zip | |
x86/hyperv: allocate output arg pages if required
When Linux runs as the root partition, it will need to make hypercalls
which return data from the hypervisor.
Allocate pages for storing results when Linux runs as the root
partition.
Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Co-Developed-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-6-wei.liu@kernel.org
Diffstat (limited to 'arch/x86/include/asm/mshyperv.h')
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 4014a1ca2fae..ef06cdac8444 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -78,6 +78,7 @@ extern int hyperv_init_cpuhp; extern void *hv_hypercall_pg; extern void __percpu **hyperv_pcpu_input_arg; +extern void __percpu **hyperv_pcpu_output_arg; static inline u64 hv_do_hypercall(u64 control, void *input, void *output) { |