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Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implement the required support by adding hvclock_page VVAR. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20170303132142.25595-4-vkuznets@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
49 lines
1 KiB
C
49 lines
1 KiB
C
#ifndef _ASM_X86_VDSO_H
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#define _ASM_X86_VDSO_H
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#include <asm/page_types.h>
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#include <linux/linkage.h>
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#include <linux/init.h>
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#ifndef __ASSEMBLER__
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#include <linux/mm_types.h>
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struct vdso_image {
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void *data;
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unsigned long size; /* Always a multiple of PAGE_SIZE */
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unsigned long alt, alt_len;
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long sym_vvar_start; /* Negative offset to the vvar area */
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long sym_vvar_page;
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long sym_hpet_page;
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long sym_pvclock_page;
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long sym_hvclock_page;
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long sym_VDSO32_NOTE_MASK;
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long sym___kernel_sigreturn;
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long sym___kernel_rt_sigreturn;
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long sym___kernel_vsyscall;
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long sym_int80_landing_pad;
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};
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#ifdef CONFIG_X86_64
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extern const struct vdso_image vdso_image_64;
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#endif
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#ifdef CONFIG_X86_X32
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extern const struct vdso_image vdso_image_x32;
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#endif
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#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
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extern const struct vdso_image vdso_image_32;
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#endif
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extern void __init init_vdso_image(const struct vdso_image *image);
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extern int map_vdso_once(const struct vdso_image *image, unsigned long addr);
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#endif /* __ASSEMBLER__ */
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#endif /* _ASM_X86_VDSO_H */
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