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clocksource/drivers/hyper-v: Include asm/hyperv-tlfs.h not asm/mshyperv.h

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clocksource/hyperv_timer.h is included into the VDSO build. It includes
asm/mshyperv.h which in turn includes the world and some more. This worked
so far by chance, but any subtle change in the include chain results in a
build breakage because VDSO builds are building user space libraries.

Include asm/hyperv-tlfs.h instead which contains everything what the VDSO
build needs except the hv_get_raw_timer() define. Move this define into a
separate header file, which contains the prerequisites (msr.h) and is
included by clocksource/hyperv_timer.h.

Fixup drivers/hv/vmbus_drv.c which relies on the indirect include of
asm/mshyperv.h.

With that the VDSO build only pulls in the minimum requirements.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/87fsemtut0.ffs@tglx
This commit is contained in:
Thomas Gleixner 2022-11-13 22:21:15 +01:00
parent 094226ad94
commit e5dfd093ec
4 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/x86/include/asm/hyperv_timer.h Normal file
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@ -0,0 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_HYPERV_TIMER_H
#define _ASM_X86_HYPERV_TIMER_H
#include <asm/msr.h>
#define hv_get_raw_timer() rdtsc_ordered()
#endif

2
arch/x86/include/asm/mshyperv.h
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@ -19,8 +19,6 @@ typedef int (*hyperv_fill_flush_list_func)(
struct hv_guest_mapping_flush_list *flush,
void *data);
#define hv_get_raw_timer() rdtsc_ordered()
void hyperv_vector_handler(struct pt_regs *regs);
#if IS_ENABLED(CONFIG_HYPERV)

1
drivers/hv/vmbus_drv.c
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@ -37,6 +37,7 @@
#include <linux/dma-map-ops.h>
#include <linux/pci.h>
#include <clocksource/hyperv_timer.h>
#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
struct vmbus_dynid {

4
include/clocksource/hyperv_timer.h
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@ -15,13 +15,15 @@
#include <linux/clocksource.h>
#include <linux/math64.h>
#include <asm/mshyperv.h>
#include <asm/hyperv-tlfs.h>
#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
#define HV_MIN_DELTA_TICKS 1
#ifdef CONFIG_HYPERV_TIMER
#include <asm/hyperv_timer.h>
/* Routines called by the VMbus driver */
extern int hv_stimer_alloc(bool have_percpu_irqs);
extern int hv_stimer_cleanup(unsigned int cpu);