Messages in this thread | | | From | Vitaly Kuznetsov <> | Subject | Re: [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V | Date | Wed, 12 Jun 2019 12:36:47 +0200 |
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Maya Nakamura <m.maya.nakamura@gmail.com> writes:
> Introduce two new functions, hv_alloc_hyperv_page() and > hv_free_hyperv_page(), to allocate/deallocate memory with the size and > alignment that Hyper-V expects as a page. Although currently they are > not used, they are ready to be used to allocate/deallocate memory on x86 > when their ARM64 counterparts are implemented, keeping symmetry between > architectures with potentially different guest page sizes. > > Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com> > --- > arch/x86/hyperv/hv_init.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c > index e4ba467a9fc6..84baf0e9a2d4 100644 > --- a/arch/x86/hyperv/hv_init.c > +++ b/arch/x86/hyperv/hv_init.c > @@ -98,6 +98,20 @@ EXPORT_SYMBOL_GPL(hyperv_pcpu_input_arg); > u32 hv_max_vp_index; > EXPORT_SYMBOL_GPL(hv_max_vp_index); > > +void *hv_alloc_hyperv_page(void) > +{ > + BUILD_BUG_ON(!(PAGE_SIZE == HV_HYP_PAGE_SIZE));
(nit)
PAGE_SIZE != HV_HYP_PAGE_SIZE ?
> + > + return (void *)__get_free_page(GFP_KERNEL); > +} > +EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page); > + > +void hv_free_hyperv_page(unsigned long addr) > +{ > + free_page(addr); > +} > +EXPORT_SYMBOL_GPL(hv_free_hyperv_page); > + > static int hv_cpu_init(unsigned int cpu) > { > u64 msr_vp_index;
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
-- Vitaly
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