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hyperv-fixes for 5.9-rc

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Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyper-v fixes from Wei Liu:

 - fix oops reporting on Hyper-V

 - make objtool happy

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/hyperv: Make hv_setup_sched_clock inline
  Drivers: hv: vmbus: Only notify Hyper-V for die events that are oops
This commit is contained in:
Linus Torvalds 2020-08-14 13:31:25 -07:00
commit cd94257d7a
4 changed files with 16 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,

4
drivers/hv/vmbus_drv.c
View File

@ -86,6 +86,10 @@ static int hyperv_die_event(struct notifier_block *nb, unsigned long val,
struct die_args *die = (struct die_args *)args;
struct pt_regs *regs = die->regs;
/* Don't notify Hyper-V if the die event is other than oops */
if (val != DIE_OOPS)
return NOTIFY_DONE;
/*
* Hyper-V should be notified only once about a panic. If we will be
* doing hyperv_report_panic_msg() later with kmsg data, don't do

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; }