The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=97993d1ebf592ac6689a498d5d0d2afb46758680
commit 97993d1ebf592ac6689a498d5d0d2afb46758680 Author: Mark Johnston <[email protected]> AuthorDate: 2021-06-08 13:40:30 +0000 Commit: Mark Johnston <[email protected]> CommitDate: 2021-06-08 13:40:30 +0000 hyperv: Fix vmbus after the i386 4/4 split The vmbus ISR needs to live in a trampoline. Dynamically allocating a trampoline at driver initialization time poses some difficulties due to the fact that the KENTER macro assumes that the offset relative to tramp_idleptd is fixed at static link time. Another problem is that native_lapic_ipi_alloc() uses setidt(), which assumes a fixed trampoline offset. Rather than fight this, move the Hyper-V ISR to i386/exception.s. Add a new HYPERV kernel option to make this optional, and configure it by default on i386. This is sufficient to make use of vmbus(4) after the 4/4 split. Note that vmbus cannot be loaded dynamically and both the HYPERV option and device must be configured together. I think this is not too onerous a requirement, since vmbus(4) was previously non-functional. Reported by: Harry Schmalzbauer <[email protected]> Tested by: Harry Schmalzbauer <[email protected]> Reviewed by: whu, kib MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D30577 --- sys/conf/files.i386 | 1 - sys/conf/options.i386 | 3 +++ sys/dev/hyperv/vmbus/i386/vmbus_vector.S | 6 +++++- sys/i386/conf/GENERIC | 4 +++- sys/i386/i386/exception.s | 9 +++++++++ sys/modules/hyperv/vmbus/Makefile | 5 ++++- 6 files changed, 24 insertions(+), 4 deletions(-) diff --git a/sys/conf/files.i386 b/sys/conf/files.i386 index 331ad5fec79a..10e286dae271 100644 --- a/sys/conf/files.i386 +++ b/sys/conf/files.i386 @@ -102,7 +102,6 @@ dev/glxiic/glxiic.c optional glxiic dev/glxsb/glxsb.c optional glxsb dev/glxsb/glxsb_hash.c optional glxsb dev/hyperv/vmbus/i386/hyperv_machdep.c optional hyperv -dev/hyperv/vmbus/i386/vmbus_vector.S optional hyperv dev/le/if_le_isa.c optional le isa dev/nctgpio/nctgpio.c optional nctgpio dev/nfe/if_nfe.c optional nfe pci diff --git a/sys/conf/options.i386 b/sys/conf/options.i386 index 4249fa1dfd0a..5e7ea446089b 100644 --- a/sys/conf/options.i386 +++ b/sys/conf/options.i386 @@ -101,6 +101,9 @@ NPX_DEBUG opt_npx.h # BPF just-in-time compiler BPF_JITTER opt_bpf.h +# Hyper-V support +HYPERV opt_hyperv.h + XENHVM opt_global.h # options for the Intel C600 SAS driver (isci) diff --git a/sys/dev/hyperv/vmbus/i386/vmbus_vector.S b/sys/dev/hyperv/vmbus/i386/vmbus_vector.S index 0570c6b49e1c..d119cfdc5b12 100644 --- a/sys/dev/hyperv/vmbus/i386/vmbus_vector.S +++ b/sys/dev/hyperv/vmbus/i386/vmbus_vector.S @@ -35,6 +35,9 @@ /* * This is the Hyper-V vmbus channel direct callback interrupt. * Only used when it is running on Hyper-V. + * + * Note that this file is not compiled directly, it is included into + * i386/exception.s. */ .text SUPERALIGN_TEXT @@ -45,6 +48,7 @@ IDTVEC(vmbus_isr) cld KENTER pushl %esp - call vmbus_handle_intr + mov $vmbus_handle_intr, %eax + call *%eax add $4, %esp jmp doreti diff --git a/sys/i386/conf/GENERIC b/sys/i386/conf/GENERIC index 1b4d853fe1d4..288968d84af1 100644 --- a/sys/i386/conf/GENERIC +++ b/sys/i386/conf/GENERIC @@ -339,7 +339,9 @@ device virtio_scsi # VirtIO SCSI device device virtio_balloon # VirtIO Memory Balloon device # HyperV drivers and enhancement support -device hyperv # HyperV drivers +# NOTE: HYPERV depends on hyperv. They must be added or removed together. +options HYPERV # Kernel support for HyperV drivers +device hyperv # HyperV drivers # Xen HVM Guest Optimizations # NOTE: XENHVM depends on xenpci. They must be added or removed together. diff --git a/sys/i386/i386/exception.s b/sys/i386/i386/exception.s index 6989d3e2828a..f47ab92f1987 100644 --- a/sys/i386/i386/exception.s +++ b/sys/i386/i386/exception.s @@ -39,6 +39,7 @@ #include "opt_apic.h" #include "opt_atpic.h" #include "opt_hwpmc_hooks.h" +#include "opt_hyperv.h" #include "assym.inc" @@ -404,6 +405,14 @@ ENTRY(fork_trampoline) #ifdef DEV_APIC #include <i386/i386/apic_vector.s> +#endif + +#ifdef HYPERV + .data + .p2align 4 + .text + SUPERALIGN_TEXT +#include <dev/hyperv/vmbus/i386/vmbus_vector.S> #endif .data diff --git a/sys/modules/hyperv/vmbus/Makefile b/sys/modules/hyperv/vmbus/Makefile index 435106c7e9bd..47a83e76204a 100644 --- a/sys/modules/hyperv/vmbus/Makefile +++ b/sys/modules/hyperv/vmbus/Makefile @@ -13,8 +13,11 @@ SRCS= hyperv.c \ vmbus_et.c \ vmbus_if.c \ vmbus_res.c \ - vmbus_vector.S \ vmbus_xact.c + +.if ${MACHINE_CPUARCH} != "i386" +SRCS+= vmbus_vector.S +.endif SRCS+= acpi_if.h bus_if.h device_if.h opt_acpi.h pci_if.h pcib_if.h vmbus_if.h # XXX: for assym.inc _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
