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Groups > linux.kernel > #1600976
| From | kys@exchange.microsoft.com |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/2] Drivers: hv: Base autoeoi enablement based on hypervisor hints |
| Date | 2017-03-15 02:10 +0100 |
| Message-ID | <tl5BU-6B-13@gated-at.bofh.it> (permalink) |
| References | <tl5BT-6B-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: K. Y. Srinivasan <kys@microsoft.com> 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> --- arch/x86/include/uapi/asm/hyperv.h | 5 +++++ 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 32ea7a3..432df4b 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 665a64f..12e7bae 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); -- 1.7.1
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[PATCH 0/2] Drivers: hv: Support vAPIC kys@exchange.microsoft.com - 2017-03-15 02:10 +0100 [PATCH 2/2] Drivers: hv: Base autoeoi enablement based on hypervisor hints kys@exchange.microsoft.com - 2017-03-15 02:10 +0100 [PATCH 1/2] Drivers: hv: Fix a typo kys@exchange.microsoft.com - 2017-03-15 02:10 +0100
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