kernel/arch/x86/include/asm/acrn.h, branch linux-5.14.y

x86/acrn: Introduce hypercall interfaces

2021-02-09T09:58:18Z

The Service VM communicates with the hypervisor via conventional hypercalls. VMCALL instruction is used to make the hypercalls. ACRN hypercall ABI: * Hypercall number is in R8 register. * Up to 2 parameters are in RDI and RSI registers. * Return value is in RAX register. Introduce the ACRN hypercall interfaces. Because GCC doesn't support R8 register as direct register constraints, use supported constraint as input with a explicit MOV to R8 in beginning of asm. Cc: Dave Hansen Cc: Sean Christopherson Cc: Dan Williams Cc: Fengwei Yin Cc: Zhi Wang Cc: Zhenyu Wang Cc: Yu Wang Cc: Reinette Chatre Cc: Greg Kroah-Hartman Cc: Borislav Petkov Cc: Arvind Sankar Cc: Peter Zijlstra Cc: Nick Desaulniers Cc: Segher Boessenkool Originally-by: Yakui Zhao Reviewed-by: Reinette Chatre Reviewed-by: Nick Desaulniers Acked-by: Borislav Petkov Signed-off-by: Shuo Liu Link: https://lore.kernel.org/r/20210207031040.49576-5-shuo.a.liu@intel.com Signed-off-by: Greg Kroah-Hartman

x86/acrn: Introduce acrn_cpuid_base() and hypervisor feature bits

2021-02-09T09:58:18Z

ACRN Hypervisor reports hypervisor features via CPUID leaf 0x40000001 which is similar to KVM. A VM can check if it's the privileged VM using the feature bits. The Service VM is the only privileged VM by design. Cc: Dave Hansen Cc: Sean Christopherson Cc: Dan Williams Cc: Fengwei Yin Cc: Zhi Wang Cc: Zhenyu Wang Cc: Yu Wang Cc: Reinette Chatre Cc: Greg Kroah-Hartman Reviewed-by: Reinette Chatre Acked-by: Borislav Petkov Signed-off-by: Yin Fengwei Signed-off-by: Shuo Liu Link: https://lore.kernel.org/r/20210207031040.49576-4-shuo.a.liu@intel.com Signed-off-by: Greg Kroah-Hartman

x86/acrn: Introduce acrn_{setup, remove}_intr_handler()

2021-02-09T09:58:18Z

The ACRN Hypervisor builds an I/O request when a trapped I/O access happens in User VM. Then, ACRN Hypervisor issues an upcall by sending a notification interrupt to the Service VM. HSM in the Service VM needs to hook the notification interrupt to handle I/O requests. Notification interrupts from ACRN Hypervisor are already supported and a, currently uninitialized, callback called. Export two APIs for HSM to setup/remove its callback. Cc: Dave Hansen Cc: Sean Christopherson Cc: Dan Williams Cc: Fengwei Yin Cc: Zhi Wang Cc: Zhenyu Wang Cc: Yu Wang Cc: Reinette Chatre Cc: Greg Kroah-Hartman Originally-by: Yakui Zhao Reviewed-by: Zhi Wang Reviewed-by: Reinette Chatre Acked-by: Borislav Petkov Signed-off-by: Shuo Liu Link: https://lore.kernel.org/r/20210207031040.49576-3-shuo.a.liu@intel.com Signed-off-by: Greg Kroah-Hartman

x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC

2020-06-11T13:15:15Z

Convert various hypervisor vectors to IDTENTRY_SYSVEC: - Implement the C entry point with DEFINE_IDTENTRY_SYSVEC - Emit the ASM stub with DECLARE_IDTENTRY_SYSVEC - Remove the ASM idtentries in 64-bit - Remove the BUILD_INTERRUPT entries in 32-bit - Remove the old prototypes No functional change. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Acked-by: Andy Lutomirski Reviewed-by: Wei Liu Link: https://lore.kernel.org/r/20200521202119.647997594@linutronix.de

x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector

2019-06-11T19:31:31Z

Use the HYPERVISOR_CALLBACK_VECTOR to notify an ACRN guest. Co-developed-by: Jason Chen CJ Signed-off-by: Jason Chen CJ Signed-off-by: Zhao Yakui Signed-off-by: Borislav Petkov Reviewed-by: Thomas Gleixner Cc: Andy Lutomirski Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Thomas Gleixner Cc: x86-ml Link: https://lkml.kernel.org/r/1559108037-18813-4-git-send-email-yakui.zhao@intel.com