From: Tianyu Lan <[email protected]> Sent: Tuesday, May 6, 2025 6:07 AM >
For consistency with other patches, use "x86/hyperv" as the Subject prefix. I'd suggest being slightly more precise and saying "Hyper-V guests" instead of "Hyper-V platform". So, x86/hyperv: Add AMD Secure AVIC support for Hyper-V guests > Secure AVIC is a new hardware feature in the AMD64 > architecture to allow SEV-SNP guests to prevent the > hypervisor from generating unexpected interrupts to > a vCPU or otherwise violate architectural assumptions > around APIC behavior. > > Each vCPU has a guest-allocated APIC backing page of > size 4K, which maintains APIC state for that vCPU. > APIC backing page's ALLOWED_IRR field indicates the s/APIC backing/The APIC backing/ > interrupt vectors which the guest allows the hypervisor > to send. > > This patchset is to enable the feature for Hyper-V > platform. Patch "Expose x2apic_savic_update_vector()" s/platform/guests/ > is to expose new fucntion and device driver and arch "is to expose the new function. Device driver and arch" > code may update AVIC backing page ALLOWED_IRR field to s/update AVIC/update the AVIC/ > allow Hyper-V inject associated vector. s/Hyper-V inject associated/Hyper-V to inject the associated/ > > This patchset is based on the AMD patchset "AMD: Add > Secure AVIC Guest Support" > https://lkml.org/lkml/2025/4/17/585 > > Tianyu Lan (6): > x86/Hyper-V: Not use hv apic driver when Secure AVIC is available > x86/x2apic-savic: Expose x2apic_savic_update_vector() > drivers/hv: Allow vmbus message synic interrupt injected from Hyper-V > x86/Hyper-V: Allow Hyper-V to inject Hyper-V vectors > x86/Hyper-V: Not use auto-eoi when Secure AVIC is available > x86/x2apic-savic: Not set APIC backing page if Secure AVIC is not > enabled. > > arch/x86/hyperv/hv_apic.c | 3 +++ > arch/x86/hyperv/hv_init.c | 12 ++++++++++++ > arch/x86/include/asm/apic.h | 9 +++++++++ > arch/x86/kernel/apic/x2apic_savic.c | 13 ++++++++++++- > arch/x86/kernel/cpu/mshyperv.c | 3 +++ > drivers/hv/hv.c | 2 ++ > 6 files changed, 41 insertions(+), 1 deletion(-) > > -- > 2.25.1 >
