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2020-06-11xen: Move xen_setup_callback_vector() definition to include/xen/hvm.hVitaly Kuznetsov1-0/+2
Kbuild test robot reports the following problem on ARM: for 'xen_setup_callback_vector' [-Wmissing-prototypes] 1664 | void xen_setup_callback_vector(void) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~ The problem is that xen_setup_callback_vector is a x86 only thing, its definition is present in arch/x86/xen/xen-ops.h but not on ARM. In events_base.c there is a stub for !CONFIG_XEN_PVHVM but it is not declared as 'static'. On x86 the situation is hardly better: drivers/xen/events/events_base.c doesn't include 'xen-ops.h' from arch/x86/xen/, it includes its namesake from include/xen/ which also results in a 'no previous prototype' warning. Currently, xen_setup_callback_vector() has two call sites: one in drivers/xen/events_base.c and another in arch/x86/xen/suspend_hvm.c. The former is placed under #ifdef CONFIG_X86 and the later is only compiled in when CONFIG_XEN_PVHVM. Resolve the issue by moving xen_setup_callback_vector() declaration to arch neutral 'include/xen/hvm.h' as the implementation lives in arch neutral drivers/xen/events/events_base.c. Reported-by: kbuild test robot <[email protected]> Signed-off-by: Vitaly Kuznetsov <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Juergen Gross <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2018-12-13xen/pvh: Add memory map pointer to hvm_start_info structMaran Wilson1-1/+62
The start info structure that is defined as part of the x86/HVM direct boot ABI and used for starting Xen PVH guests would be more versatile if it also included a way to pass information about the memory map to the guest. This would allow KVM guests to share the same entry point. Signed-off-by: Maran Wilson <[email protected]> Reviewed-by: Juergen Gross <[email protected]> Signed-off-by: Boris Ostrovsky <[email protected]>
2017-02-14xen/privcmd: Add IOCTL_PRIVCMD_DM_OPPaul Durrant1-0/+32
Recently a new dm_op[1] hypercall was added to Xen to provide a mechanism for restricting device emulators (such as QEMU) to a limited set of hypervisor operations, and being able to audit those operations in the kernel of the domain in which they run. This patch adds IOCTL_PRIVCMD_DM_OP as gateway for __HYPERVISOR_dm_op. NOTE: There is no requirement for user-space code to bounce data through locked memory buffers (as with IOCTL_PRIVCMD_HYPERCALL) since privcmd has enough information to lock the original buffers directly. [1] http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=524a98c2 Signed-off-by: Paul Durrant <[email protected]> Acked-by: Stefano Stabellini <[email protected]> Signed-off-by: Boris Ostrovsky <[email protected]>
2017-02-07xen/pvh: Import PVH-related Xen public interfacesBoris Ostrovsky2-0/+241
Signed-off-by: Boris Ostrovsky <[email protected]> Reviewed-by: Juergen Gross <[email protected]> Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
2016-07-06xen/hvm/params: Add a new delivery type for event-channel in ↵Shannon Zhao1-0/+13
HVM_PARAM_CALLBACK_IRQ This new delivery type which is for ARM shares the same value with HVM_PARAM_CALLBACK_TYPE_VECTOR which is for x86. val[15:8] is flag: val[7:0] is a PPI. To the flag, bit 8 stands the interrupt mode is edge(1) or level(0) and bit 9 stands the interrupt polarity is active low(1) or high(0). Signed-off-by: Shannon Zhao <[email protected]> Acked-by: Stefano Stabellini <[email protected]> Reviewed-by: Julien Grall <[email protected]> Tested-by: Julien Grall <[email protected]>
2016-07-06Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA ABI from XenShannon Zhao1-6/+21
Sync the changes of HVM_PARAM_CALLBACK_VIA ABI introduced by Xen commit <ca5c54b6ff05> (public/hvm: export the HVM_PARAM_CALLBACK_VIA ABI in the API). Signed-off-by: Shannon Zhao <[email protected]> Acked-by: Stefano Stabellini <[email protected]> Tested-by: Julien Grall <[email protected]>
2012-10-12Merge tag 'stable/for-linus-3.7-rc0-tag' of ↵Linus Torvalds1-0/+19
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen fixes from Konrad Rzeszutek Wilk: "This has four bug-fixes and one tiny feature that I forgot to put initially in my tree due to oversight. The feature is for kdump kernels to speed up the /proc/vmcore reading. There is a ram_is_pfn helper function that the different platforms can register for. We are now doing that. The bug-fixes cover some embarrassing struct pv_cpu_ops variables being set to NULL on Xen (but not baremetal). We had a similar issue in the past with {write|read}_msr_safe and this fills the three missing ones. The other bug-fix is to make the console output (hvc) be capable of dealing with misbehaving backends and not fall flat on its face. Lastly, a quirk for older XenBus implementations that came with an ancient v3.4 hypervisor (so RHEL5 based) - reading of certain non-existent attributes just hangs the guest during bootup - so we take precaution of not doing that on such older installations. Feature: - Register a pfn_is_ram helper to speed up reading of /proc/vmcore. Bug-fixes: - Three pvops call for Xen were undefined causing BUG_ONs. - Add a quirk so that the shutdown watches (used by kdump) are not used with older Xen (3.4). - Fix ungraceful state transition for the HVC console." * tag 'stable/for-linus-3.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/pv-on-hvm kexec: add quirk for Xen 3.4 and shutdown watches. xen/bootup: allow {read|write}_cr8 pvops call. xen/bootup: allow read_tscp call for Xen PV guests. xen pv-on-hvm: add pfn_is_ram helper for kdump xen/hvc: handle backend CLOSED without CLOSING
2012-10-04xen pv-on-hvm: add pfn_is_ram helper for kdumpOlaf Hering1-0/+19
Register pfn_is_ram helper speed up reading /proc/vmcore in the kdump kernel. See commit message of 997c136f518c ("fs/proc/vmcore.c: add hook to read_from_oldmem() to check for non-ram pages") for details. It makes use of a new hvmop HVMOP_get_mem_type which was introduced in xen 4.2 (23298:26413986e6e0) and backported to 4.1.1. The new function is currently only enabled for reading /proc/vmcore. Later it will be used also for the kexec kernel. Since that requires more changes in the generic kernel make it static for the time being. Signed-off-by: Olaf Hering <[email protected]> Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
2012-10-02UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel ↵David Howells1-1/+1
system headers Convert #include "..." to #include <path/...> in kernel system headers. Signed-off-by: David Howells <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Acked-by: Dave Jones <[email protected]>
2012-03-13hvc_xen: support PV on HVM consolesStefano Stabellini1-1/+5
Signed-off-by: Stefano Stabellini <[email protected]> Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
2010-07-26x86: Call HVMOP_pagetable_dying on exit_mmap.Stefano Stabellini1-0/+11
When a pagetable is about to be destroyed, we notify Xen so that the hypervisor can clear the related shadow pagetable. Signed-off-by: Stefano Stabellini <[email protected]> Signed-off-by: Jeremy Fitzhardinge <[email protected]>
2010-07-22xen: Add support for HVM hypercalls.Jeremy Fitzhardinge2-0/+130
Signed-off-by: Jeremy Fitzhardinge <[email protected]> Signed-off-by: Sheng Yang <[email protected]> Signed-off-by: Stefano Stabellini <[email protected]>