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| author | K. Y. Srinivasan <kys@microsoft.com> | 2017-03-15 02:01:39 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-17 07:10:49 +0100 |
| commit | 6c248aad81c8903981db9f12fd74189fa01b3789 (patch) | |
| tree | be0719944f1822567d507d12f12c76aa4e1e4301 | |
| parent | Drivers: hv: Fix a typo (diff) | |
| download | linux-6c248aad81c8903981db9f12fd74189fa01b3789.tar.xz linux-6c248aad81c8903981db9f12fd74189fa01b3789.zip | |
Drivers: hv: Base autoeoi enablement based on hypervisor hints
Don't enable auto-eoi if the hypervisor recommends otherwise. This will
enable vAPIC functionality if available.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/include/uapi/asm/hyperv.h | 5 | ||||
| -rw-r--r-- | drivers/hv/hv.c | 5 |
2 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h index 32ea7a3ad5b4..432df4b1baec 100644 --- a/arch/x86/include/uapi/asm/hyperv.h +++ b/arch/x86/include/uapi/asm/hyperv.h @@ -148,6 +148,11 @@ #define HV_X64_RELAXED_TIMING_RECOMMENDED (1 << 5) /* + * Virtual APIC support + */ +#define HV_X64_DEPRECATING_AEOI_RECOMMENDED (1 << 9) + +/* * Crash notification flag. */ #define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 665a64f1611e..12e7baecb84e 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -254,7 +254,10 @@ int hv_synic_init(unsigned int cpu) shared_sint.as_uint64 = 0; shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR; shared_sint.masked = false; - shared_sint.auto_eoi = true; + if (ms_hyperv.hints & HV_X64_DEPRECATING_AEOI_RECOMMENDED) + shared_sint.auto_eoi = false; + else + shared_sint.auto_eoi = true; hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |