From 4c071ee5268f7234c3d084b6093bebccc28cdcba Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 14 Sep 2012 13:53:39 +0000 Subject: arm: initial Xen support - Basic hypervisor.h and interface.h definitions. - Skeleton enlighten.c, set xen_start_info to an empty struct. - Make xen_initial_domain dependent on the SIF_PRIVILIGED_BIT. The new code only compiles when CONFIG_XEN is set, that is going to be added to arch/arm/Kconfig in patch #11 "xen/arm: introduce CONFIG_XEN on ARM". Changes in v3: - improve comments. Signed-off-by: Stefano Stabellini Acked-by: Konrad Rzeszutek Wilk --- include/xen/xen.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/xen') diff --git a/include/xen/xen.h b/include/xen/xen.h index a16402418d31..2c0d3a56c749 100644 --- a/include/xen/xen.h +++ b/include/xen/xen.h @@ -23,7 +23,7 @@ extern enum xen_domain_type xen_domain_type; #include #include -#define xen_initial_domain() (xen_pv_domain() && \ +#define xen_initial_domain() (xen_domain() && \ xen_start_info->flags & SIF_INITDOMAIN) #else /* !CONFIG_XEN_DOM0 */ #define xen_initial_domain() (0) -- cgit v1.2.3 From 256f631f1f7e7bedc882510679ad4473a2274708 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 14 Sep 2012 13:34:43 +0000 Subject: xen/arm: Introduce xen_ulong_t for unsigned long All the original Xen headers have xen_ulong_t as unsigned long type, however when they have been imported in Linux, xen_ulong_t has been replaced with unsigned long. That might work for x86 and ia64 but it does not for arm. Bring back xen_ulong_t and let each architecture define xen_ulong_t as they see fit. Also explicitly size pointers (__DEFINE_GUEST_HANDLE) to 64 bit. Changes in v3: - remove the incorrect changes to multicall_entry; - remove the change to apic_physbase. Signed-off-by: Stefano Stabellini Acked-by: Konrad Rzeszutek Wilk --- arch/arm/include/asm/xen/interface.h | 8 ++++++-- arch/ia64/include/asm/xen/interface.h | 1 + arch/x86/include/asm/xen/interface.h | 1 + include/xen/interface/memory.h | 12 ++++++------ include/xen/interface/physdev.h | 2 +- include/xen/interface/version.h | 2 +- 6 files changed, 16 insertions(+), 10 deletions(-) (limited to 'include/xen') diff --git a/arch/arm/include/asm/xen/interface.h b/arch/arm/include/asm/xen/interface.h index 74c72b5083a6..ae05e56dd17d 100644 --- a/arch/arm/include/asm/xen/interface.h +++ b/arch/arm/include/asm/xen/interface.h @@ -9,8 +9,11 @@ #include +#define uint64_aligned_t uint64_t __attribute__((aligned(8))) + #define __DEFINE_GUEST_HANDLE(name, type) \ - typedef type * __guest_handle_ ## name + typedef struct { union { type *p; uint64_aligned_t q; }; } \ + __guest_handle_ ## name #define DEFINE_GUEST_HANDLE_STRUCT(name) \ __DEFINE_GUEST_HANDLE(name, struct name) @@ -21,13 +24,14 @@ do { \ if (sizeof(hnd) == 8) \ *(uint64_t *)&(hnd) = 0; \ - (hnd) = val; \ + (hnd).p = val; \ } while (0) #ifndef __ASSEMBLY__ /* Explicitly size integers that represent pfns in the interface with * Xen so that we can have one ABI that works for 32 and 64 bit guests. */ typedef uint64_t xen_pfn_t; +typedef uint64_t xen_ulong_t; /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); diff --git a/arch/ia64/include/asm/xen/interface.h b/arch/ia64/include/asm/xen/interface.h index 3d52a5bbd857..e88c5de27410 100644 --- a/arch/ia64/include/asm/xen/interface.h +++ b/arch/ia64/include/asm/xen/interface.h @@ -71,6 +71,7 @@ * with Xen so that we could have one ABI that works for 32 and 64 bit * guests. */ typedef unsigned long xen_pfn_t; +typedef unsigned long xen_ulong_t; /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); diff --git a/arch/x86/include/asm/xen/interface.h b/arch/x86/include/asm/xen/interface.h index 555f94d3637b..28fc6211a79a 100644 --- a/arch/x86/include/asm/xen/interface.h +++ b/arch/x86/include/asm/xen/interface.h @@ -51,6 +51,7 @@ * with Xen so that on ARM we can have one ABI that works for 32 and 64 * bit guests. */ typedef unsigned long xen_pfn_t; +typedef unsigned long xen_ulong_t; /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index d8e33a93ea4d..b66d04ce6957 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -34,7 +34,7 @@ struct xen_memory_reservation { GUEST_HANDLE(xen_pfn_t) extent_start; /* Number of extents, and size/alignment of each (2^extent_order pages). */ - unsigned long nr_extents; + xen_ulong_t nr_extents; unsigned int extent_order; /* @@ -92,7 +92,7 @@ struct xen_memory_exchange { * command will be non-zero. * 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER! */ - unsigned long nr_exchanged; + xen_ulong_t nr_exchanged; }; DEFINE_GUEST_HANDLE_STRUCT(xen_memory_exchange); @@ -148,8 +148,8 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list); */ #define XENMEM_machphys_mapping 12 struct xen_machphys_mapping { - unsigned long v_start, v_end; /* Start and end virtual addresses. */ - unsigned long max_mfn; /* Maximum MFN that can be looked up. */ + xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */ + xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */ }; DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t); @@ -172,7 +172,7 @@ struct xen_add_to_physmap { unsigned int space; /* Index into source mapping space. */ - unsigned long idx; + xen_ulong_t idx; /* GPFN where the source mapping page should appear. */ xen_pfn_t gpfn; @@ -189,7 +189,7 @@ struct xen_translate_gpfn_list { domid_t domid; /* Length of list. */ - unsigned long nr_gpfns; + xen_ulong_t nr_gpfns; /* List of GPFNs to translate. */ GUEST_HANDLE(ulong) gpfn_list; diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index 9ce788d8cf49..f616514f781b 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -56,7 +56,7 @@ struct physdev_eoi { #define PHYSDEVOP_pirq_eoi_gmfn_v2 28 struct physdev_pirq_eoi_gmfn { /* IN */ - unsigned long gmfn; + xen_ulong_t gmfn; }; /* diff --git a/include/xen/interface/version.h b/include/xen/interface/version.h index dd58cf5ea3e4..3030c81c09ce 100644 --- a/include/xen/interface/version.h +++ b/include/xen/interface/version.h @@ -45,7 +45,7 @@ struct xen_changeset_info { #define XENVER_platform_parameters 5 struct xen_platform_parameters { - unsigned long virt_start; + xen_ulong_t virt_start; }; #define XENVER_get_features 6 -- cgit v1.2.3 From ef61ee0dc7ba0409dc0e8122de90d4e48d4c8669 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Wed, 8 Aug 2012 17:20:18 +0000 Subject: xen/arm: get privilege status Use Xen features to figure out if we are privileged. XENFEAT_dom0 was introduced by 23735 in xen-unstable.hg. Signed-off-by: Stefano Stabellini Acked-by: Konrad Rzeszutek Wilk --- arch/arm/xen/enlighten.c | 7 +++++++ include/xen/interface/features.h | 3 +++ 2 files changed, 10 insertions(+) (limited to 'include/xen') diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 6a0217d4e662..c2a47a724870 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -1,6 +1,7 @@ #include #include #include +#include #include #include #include @@ -66,6 +67,12 @@ static int __init xen_guest_init(void) } xen_domain_type = XEN_HVM_DOMAIN; + xen_setup_features(); + if (xen_feature(XENFEAT_dom0)) + xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED; + else + xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED); + if (!shared_info_page) shared_info_page = (struct shared_info *) get_zeroed_page(GFP_KERNEL); diff --git a/include/xen/interface/features.h b/include/xen/interface/features.h index b6ca39a069d8..131a6ccdba25 100644 --- a/include/xen/interface/features.h +++ b/include/xen/interface/features.h @@ -50,6 +50,9 @@ /* x86: pirq can be used by HVM guests */ #define XENFEAT_hvm_pirqs 10 +/* operation as Dom0 is supported */ +#define XENFEAT_dom0 11 + #define XENFEAT_NR_SUBMAPS 1 #endif /* __XEN_PUBLIC_FEATURES_H__ */ -- cgit v1.2.3 From 0ec53ecf38bcbf95b4b057328a8fbba4d22ef28b Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 14 Sep 2012 13:37:32 +0000 Subject: xen/arm: receive Xen events on ARM Compile events.c on ARM. Parse, map and enable the IRQ to get event notifications from the device tree (node "/xen"). Signed-off-by: Stefano Stabellini Acked-by: Konrad Rzeszutek Wilk --- arch/arm/include/asm/xen/events.h | 18 ++++++++++++++++++ arch/arm/xen/enlighten.c | 33 +++++++++++++++++++++++++++++++++ arch/x86/xen/enlighten.c | 1 + arch/x86/xen/irq.c | 1 + arch/x86/xen/xen-ops.h | 1 - drivers/xen/events.c | 17 ++++++++++++++--- include/xen/events.h | 2 ++ 7 files changed, 69 insertions(+), 4 deletions(-) create mode 100644 arch/arm/include/asm/xen/events.h (limited to 'include/xen') diff --git a/arch/arm/include/asm/xen/events.h b/arch/arm/include/asm/xen/events.h new file mode 100644 index 000000000000..94b4e9020b02 --- /dev/null +++ b/arch/arm/include/asm/xen/events.h @@ -0,0 +1,18 @@ +#ifndef _ASM_ARM_XEN_EVENTS_H +#define _ASM_ARM_XEN_EVENTS_H + +#include + +enum ipi_vector { + XEN_PLACEHOLDER_VECTOR, + + /* Xen IPIs go here */ + XEN_NR_IPIS, +}; + +static inline int xen_irqs_disabled(struct pt_regs *regs) +{ + return raw_irqs_disabled_flags(regs->ARM_cpsr); +} + +#endif /* _ASM_ARM_XEN_EVENTS_H */ diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 036a4d84e861..bad67ad43c2d 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -1,4 +1,5 @@ #include +#include #include #include #include @@ -9,6 +10,8 @@ #include #include #include +#include +#include #include #include #include @@ -33,6 +36,8 @@ EXPORT_SYMBOL_GPL(xen_have_vector_callback); int xen_platform_pci_unplug = XEN_UNPLUG_ALL; EXPORT_SYMBOL_GPL(xen_platform_pci_unplug); +static __read_mostly int xen_events_irq = -1; + int xen_remap_domain_mfn_range(struct vm_area_struct *vma, unsigned long addr, unsigned long mfn, int nr, @@ -74,6 +79,9 @@ static int __init xen_guest_init(void) if (of_address_to_resource(node, GRANT_TABLE_PHYSADDR, &res)) return 0; xen_hvm_resume_frames = res.start >> PAGE_SHIFT; + xen_events_irq = irq_of_parse_and_map(node, 0); + pr_info("Xen %s support found, events_irq=%d gnttab_frame_pfn=%lx\n", + version, xen_events_irq, xen_hvm_resume_frames); xen_domain_type = XEN_HVM_DOMAIN; xen_setup_features(); @@ -115,3 +123,28 @@ static int __init xen_guest_init(void) return 0; } core_initcall(xen_guest_init); + +static irqreturn_t xen_arm_callback(int irq, void *arg) +{ + xen_hvm_evtchn_do_upcall(); + return IRQ_HANDLED; +} + +static int __init xen_init_events(void) +{ + if (!xen_domain() || xen_events_irq < 0) + return -ENODEV; + + xen_init_IRQ(); + + if (request_percpu_irq(xen_events_irq, xen_arm_callback, + "events", xen_vcpu)) { + pr_err("Error requesting IRQ %d\n", xen_events_irq); + return -EINVAL; + } + + enable_percpu_irq(xen_events_irq, 0); + + return 0; +} +postcore_initcall(xen_init_events); diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 47b3acdc2ac5..689a4c9da866 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -33,6 +33,7 @@ #include #include +#include #include #include #include diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c index 157337657971..01a4dc015ae1 100644 --- a/arch/x86/xen/irq.c +++ b/arch/x86/xen/irq.c @@ -5,6 +5,7 @@ #include #include #include +#include #include #include diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index bb5a8105ea86..a95b41744ad0 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -35,7 +35,6 @@ void xen_set_pat(u64); char * __init xen_memory_setup(void); void __init xen_arch_setup(void); -void __init xen_init_IRQ(void); void xen_enable_sysenter(void); void xen_enable_syscall(void); void xen_vcpu_restore(void); diff --git a/drivers/xen/events.c b/drivers/xen/events.c index c60d1629c916..8672211555bb 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -31,14 +31,16 @@ #include #include +#ifdef CONFIG_X86 #include #include #include #include #include -#include #include #include +#endif +#include #include #include @@ -50,6 +52,9 @@ #include #include #include +#include +#include +#include /* * This lock protects updates to the following mapping and reference-count @@ -1386,7 +1391,9 @@ void xen_evtchn_do_upcall(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); +#ifdef CONFIG_X86 exit_idle(); +#endif irq_enter(); __xen_evtchn_do_upcall(); @@ -1795,9 +1802,9 @@ void xen_callback_vector(void) void xen_callback_vector(void) {} #endif -void __init xen_init_IRQ(void) +void xen_init_IRQ(void) { - int i, rc; + int i; evtchn_to_irq = kcalloc(NR_EVENT_CHANNELS, sizeof(*evtchn_to_irq), GFP_KERNEL); @@ -1813,6 +1820,7 @@ void __init xen_init_IRQ(void) pirq_needs_eoi = pirq_needs_eoi_flag; +#ifdef CONFIG_X86 if (xen_hvm_domain()) { xen_callback_vector(); native_init_IRQ(); @@ -1820,6 +1828,7 @@ void __init xen_init_IRQ(void) * __acpi_register_gsi can point at the right function */ pci_xen_hvm_init(); } else { + int rc; struct physdev_pirq_eoi_gmfn eoi_gmfn; irq_ctx_init(smp_processor_id()); @@ -1835,4 +1844,6 @@ void __init xen_init_IRQ(void) } else pirq_needs_eoi = pirq_check_eoi_map; } +#endif } +EXPORT_SYMBOL_GPL(xen_init_IRQ); diff --git a/include/xen/events.h b/include/xen/events.h index 04399b28e821..c6bfe01acf6b 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -109,4 +109,6 @@ int xen_irq_from_gsi(unsigned gsi); /* Determine whether to ignore this IRQ if it is passed to a guest. */ int xen_test_irq_shared(int irq); +/* initialize Xen IRQ subsystem */ +void xen_init_IRQ(void); #endif /* _XEN_EVENTS_H */ -- cgit v1.2.3 From e79affc3f2461fc927ed5d09adfb6348b258e88b Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Wed, 8 Aug 2012 17:21:14 +0000 Subject: xen/arm: compile blkfront and blkback Signed-off-by: Stefano Stabellini Acked-by: Konrad Rzeszutek Wilk --- drivers/block/xen-blkback/blkback.c | 1 + include/xen/interface/io/protocols.h | 3 +++ 2 files changed, 4 insertions(+) (limited to 'include/xen') diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 73f196ca713f..63dd5b96b65a 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -42,6 +42,7 @@ #include #include +#include #include #include #include "common.h" diff --git a/include/xen/interface/io/protocols.h b/include/xen/interface/io/protocols.h index 01fc8ae5f0b0..0eafaf254fff 100644 --- a/include/xen/interface/io/protocols.h +++ b/include/xen/interface/io/protocols.h @@ -5,6 +5,7 @@ #define XEN_IO_PROTO_ABI_X86_64 "x86_64-abi" #define XEN_IO_PROTO_ABI_IA64 "ia64-abi" #define XEN_IO_PROTO_ABI_POWERPC64 "powerpc64-abi" +#define XEN_IO_PROTO_ABI_ARM "arm-abi" #if defined(__i386__) # define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_32 @@ -14,6 +15,8 @@ # define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_IA64 #elif defined(__powerpc64__) # define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_POWERPC64 +#elif defined(__arm__) +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_ARM #else # error arch fixup needed here #endif -- cgit v1.2.3