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x86/hyperv: Make hv_setup_sched_clock inline 

Make hv_setup_sched_clock inline so the reference to pv_ops works
correctly with objtool updates to detect noinstr violations.
See https://lore.kernel.org/patchwork/patch/1283635/

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/1597022991-24088-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Michael Kelley 2020-08-09 18:29:51 -07:00 committed by Wei Liu
parent 608a973bd5
commit b9d8cf2eb3
3 changed files with 12 additions and 8 deletions
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12
arch/x86/include/asm/mshyperv.h
View File

@ -8,6 +8,7 @@
#include <asm/io.h>
#include <asm/hyperv-tlfs.h>
#include <asm/nospec-branch.h>
#include <asm/paravirt.h>
typedef int (*hyperv_fill_flush_list_func)(
struct hv_guest_mapping_flush_list *flush,
@ -54,6 +55,17 @@ typedef int (*hyperv_fill_flush_list_func)(
vclocks_set_used(VDSO_CLOCKMODE_HVCLOCK);
#define hv_get_raw_timer() rdtsc_ordered()
/*
* Reference to pv_ops must be inline so objtool
* detection of noinstr violations can work correctly.
*/
static __always_inline void hv_setup_sched_clock(void *sched_clock)
{
#ifdef CONFIG_PARAVIRT
pv_ops.time.sched_clock = sched_clock;
#endif
}
void hyperv_vector_handler(struct pt_regs *regs);
static inline void hv_enable_stimer0_percpu_irq(int irq) {}

7
arch/x86/kernel/cpu/mshyperv.c
View File

@ -361,13 +361,6 @@ static void __init ms_hyperv_init_platform(void)
#endif
}
void hv_setup_sched_clock(void *sched_clock)
{
#ifdef CONFIG_PARAVIRT
pv_ops.time.sched_clock = sched_clock;
#endif
}
const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
.name = "Microsoft Hyper-V",
.detect = ms_hyperv_platform,

1
include/asm-generic/mshyperv.h
View File

@ -168,7 +168,6 @@ void hyperv_report_panic_msg(phys_addr_t pa, size_t size);
bool hv_is_hyperv_initialized(void);
bool hv_is_hibernation_supported(void);
void hyperv_cleanup(void);
void hv_setup_sched_clock(void *sched_clock);
#else /* CONFIG_HYPERV */
static inline bool hv_is_hyperv_initialized(void) { return false; }
static inline bool hv_is_hibernation_supported(void) { return false; }