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hyperv-fixes for 5.10-rc3

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

Pull hyperv fixes from Wei Liu:

 - clarify a comment (Michael Kelley)

 - change a pr_warn() to pr_info() (Olaf Hering)

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/hyperv: Clarify comment on x2apic mode
  hv_balloon: disable warning when floor reached
This commit is contained in:
Linus Torvalds 2020-11-05 11:32:03 -08:00
commit 6732b35485
2 changed files with 10 additions and 6 deletions
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14
arch/x86/hyperv/hv_apic.c
View File

@ -273,11 +273,15 @@ void __init hv_apic_init(void)
pr_info("Hyper-V: Using enlightened APIC (%s mode)",
x2apic_enabled() ? "x2apic" : "xapic");
/*
* With x2apic, architectural x2apic MSRs are equivalent to the
* respective synthetic MSRs, so there's no need to override
* the apic accessors. The only exception is
* hv_apic_eoi_write, because it benefits from lazy EOI when
* available, but it works for both xapic and x2apic modes.
* When in x2apic mode, don't use the Hyper-V specific APIC
* accessors since the field layout in the ICR register is
* different in x2apic mode. Furthermore, the architectural
* x2apic MSRs function just as well as the Hyper-V
* synthetic APIC MSRs, so there's no benefit in having
* separate Hyper-V accessors for x2apic mode. The only
* exception is hv_apic_eoi_write, because it benefits from
* lazy EOI when available, but the same accessor works for
* both xapic and x2apic because the field layout is the same.
*/
apic_set_eoi_write(hv_apic_eoi_write);
if (!x2apic_enabled()) {

2
drivers/hv/hv_balloon.c
View File

@ -1275,7 +1275,7 @@ static void balloon_up(struct work_struct *dummy)
/* Refuse to balloon below the floor. */
if (avail_pages < num_pages || avail_pages - num_pages < floor) {
pr_warn("Balloon request will be partially fulfilled. %s\n",
pr_info("Balloon request will be partially fulfilled. %s\n",
avail_pages < num_pages ? "Not enough memory." :
"Balloon floor reached.");