xen: features and fixes for v4.15-rc1
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Merge tag 'for-linus-4.15-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross:
"Xen features and fixes for v4.15-rc1
Apart from several small fixes it contains the following features:
- a series by Joao Martins to add vdso support of the pv clock
interface
- a series by Juergen Gross to add support for Xen pv guests to be
able to run on 5 level paging hosts
- a series by Stefano Stabellini adding the Xen pvcalls frontend
driver using a paravirtualized socket interface"
* tag 'for-linus-4.15-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (34 commits)
xen/pvcalls: fix potential endless loop in pvcalls-front.c
xen/pvcalls: Add MODULE_LICENSE()
MAINTAINERS: xen, kvm: track pvclock-abi.h changes
x86/xen/time: setup vcpu 0 time info page
x86/xen/time: set pvclock flags on xen_time_init()
x86/pvclock: add setter for pvclock_pvti_cpu0_va
ptp_kvm: probe for kvm guest availability
xen/privcmd: remove unused variable pageidx
xen: select grant interface version
xen: update arch/x86/include/asm/xen/cpuid.h
xen: add grant interface version dependent constants to gnttab_ops
xen: limit grant v2 interface to the v1 functionality
xen: re-introduce support for grant v2 interface
xen: support priv-mapping in an HVM tools domain
xen/pvcalls: remove redundant check for irq >= 0
xen/pvcalls: fix unsigned less than zero error check
xen/time: Return -ENODEV from xen_get_wallclock()
xen/pvcalls-front: mark expected switch fall-through
xen: xenbus_probe_frontend: mark expected switch fall-throughs
xen/time: do not decrease steal time after live migration on xen
...
This commit is contained in:
Linus Torvalds
commit
051089a2ee
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@ -7650,6 +7650,7 @@ S: Supported
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F: arch/x86/kvm/
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F: arch/x86/include/uapi/asm/kvm*
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F: arch/x86/include/asm/kvm*
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F: arch/x86/include/asm/pvclock-abi.h
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F: arch/x86/kernel/kvm.c
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F: arch/x86/kernel/kvmclock.c
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@ -14838,6 +14839,7 @@ F: arch/x86/xen/
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F: drivers/*/xen-*front.c
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F: drivers/xen/
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F: arch/x86/include/asm/xen/
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F: arch/x86/include/asm/pvclock-abi.h
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F: include/xen/
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F: include/uapi/xen/
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F: Documentation/ABI/stable/sysfs-hypervisor-xen
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@ -45,7 +45,14 @@ void arch_gnttab_unmap(void *shared, unsigned long nr_gframes)
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return;
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}
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int arch_gnttab_init(unsigned long nr_shared)
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int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
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unsigned long max_nr_gframes,
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grant_status_t **__shared)
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{
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return -ENOSYS;
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}
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int arch_gnttab_init(unsigned long nr_shared, unsigned long nr_status)
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{
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return 0;
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}
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@ -112,7 +112,7 @@ static int vvar_fault(const struct vm_special_mapping *sm,
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__pa_symbol(&__vvar_page) >> PAGE_SHIFT);
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} else if (sym_offset == image->sym_pvclock_page) {
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struct pvclock_vsyscall_time_info *pvti =
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pvclock_pvti_cpu0_va();
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pvclock_get_pvti_cpu0_va();
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if (pvti && vclock_was_used(VCLOCK_PVCLOCK)) {
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ret = vm_insert_pfn_prot(
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vma,
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@ -5,15 +5,6 @@
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#include <linux/clocksource.h>
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#include <asm/pvclock-abi.h>
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#ifdef CONFIG_KVM_GUEST
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extern struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void);
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#else
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static inline struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void)
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{
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return NULL;
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}
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#endif
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/* some helper functions for xen and kvm pv clock sources */
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u64 pvclock_clocksource_read(struct pvclock_vcpu_time_info *src);
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u8 pvclock_read_flags(struct pvclock_vcpu_time_info *src);
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@ -102,4 +93,14 @@ struct pvclock_vsyscall_time_info {
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#define PVTI_SIZE sizeof(struct pvclock_vsyscall_time_info)
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#ifdef CONFIG_PARAVIRT_CLOCK
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void pvclock_set_pvti_cpu0_va(struct pvclock_vsyscall_time_info *pvti);
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struct pvclock_vsyscall_time_info *pvclock_get_pvti_cpu0_va(void);
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#else
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static inline struct pvclock_vsyscall_time_info *pvclock_get_pvti_cpu0_va(void)
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{
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return NULL;
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}
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#endif
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#endif /* _ASM_X86_PVCLOCK_H */
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@ -74,21 +74,43 @@
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#define XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD (1u<<0)
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/*
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* Leaf 5 (0x40000x04)
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* HVM-specific features
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* EAX: Features
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* EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag)
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* Leaf 4 (0x40000x03)
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* Sub-leaf 0: EAX: bit 0: emulated tsc
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* bit 1: host tsc is known to be reliable
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* bit 2: RDTSCP instruction available
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* EBX: tsc_mode: 0=default (emulate if necessary), 1=emulate,
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* 2=no emulation, 3=no emulation + TSC_AUX support
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* ECX: guest tsc frequency in kHz
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* EDX: guest tsc incarnation (migration count)
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* Sub-leaf 1: EAX: tsc offset low part
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* EBX: tsc offset high part
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* ECX: multiplicator for tsc->ns conversion
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* EDX: shift amount for tsc->ns conversion
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* Sub-leaf 2: EAX: host tsc frequency in kHz
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*/
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/* Virtualized APIC registers */
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#define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0)
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/* Virtualized x2APIC accesses */
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#define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1)
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/*
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* Leaf 5 (0x40000x04)
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* HVM-specific features
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* Sub-leaf 0: EAX: Features
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* Sub-leaf 0: EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag)
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*/
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#define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0) /* Virtualized APIC registers */
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#define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1) /* Virtualized x2APIC accesses */
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/* Memory mapped from other domains has valid IOMMU entries */
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#define XEN_HVM_CPUID_IOMMU_MAPPINGS (1u << 2)
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/* vcpu id is present in EBX */
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#define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3)
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#define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3) /* vcpu id is present in EBX */
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#define XEN_CPUID_MAX_NUM_LEAVES 4
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/*
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* Leaf 6 (0x40000x05)
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* PV-specific parameters
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* Sub-leaf 0: EAX: max available sub-leaf
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* Sub-leaf 0: EBX: bits 0-7: max machine address width
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*/
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/* Max. address width in bits taking memory hotplug into account. */
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#define XEN_CPUID_MACHINE_ADDRESS_WIDTH_MASK (0xffu << 0)
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#define XEN_CPUID_MAX_NUM_LEAVES 5
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#endif /* __XEN_PUBLIC_ARCH_X86_CPUID_H__ */
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@ -27,6 +27,15 @@ typedef struct xpaddr {
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phys_addr_t paddr;
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} xpaddr_t;
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#ifdef CONFIG_X86_64
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#define XEN_PHYSICAL_MASK __sme_clr((1UL << 52) - 1)
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#else
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#define XEN_PHYSICAL_MASK __PHYSICAL_MASK
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#endif
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#define XEN_PTE_MFN_MASK ((pteval_t)(((signed long)PAGE_MASK) & \
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XEN_PHYSICAL_MASK))
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#define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
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#define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
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@ -278,7 +287,7 @@ static inline unsigned long bfn_to_local_pfn(unsigned long mfn)
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static inline unsigned long pte_mfn(pte_t pte)
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{
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return (pte.pte & PTE_PFN_MASK) >> PAGE_SHIFT;
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return (pte.pte & XEN_PTE_MFN_MASK) >> PAGE_SHIFT;
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}
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static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
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@ -48,12 +48,6 @@ early_param("no-kvmclock", parse_no_kvmclock);
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static struct pvclock_vsyscall_time_info *hv_clock;
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static struct pvclock_wall_clock *wall_clock;
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struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void)
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{
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return hv_clock;
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}
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EXPORT_SYMBOL_GPL(pvclock_pvti_cpu0_va);
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/*
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* The wallclock is the time of day when we booted. Since then, some time may
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* have elapsed since the hypervisor wrote the data. So we try to account for
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@ -377,6 +371,7 @@ int __init kvm_setup_vsyscall_timeinfo(void)
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return 1;
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}
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pvclock_set_pvti_cpu0_va(hv_clock);
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put_cpu();
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kvm_clock.archdata.vclock_mode = VCLOCK_PVCLOCK;
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@ -25,8 +25,10 @@
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#include <asm/fixmap.h>
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#include <asm/pvclock.h>
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#include <asm/vgtod.h>
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static u8 valid_flags __read_mostly = 0;
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static struct pvclock_vsyscall_time_info *pvti_cpu0_va __read_mostly;
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void pvclock_set_flags(u8 flags)
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{
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@ -144,3 +146,15 @@ void pvclock_read_wallclock(struct pvclock_wall_clock *wall_clock,
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set_normalized_timespec(ts, now.tv_sec, now.tv_nsec);
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}
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void pvclock_set_pvti_cpu0_va(struct pvclock_vsyscall_time_info *pvti)
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{
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WARN_ON(vclock_was_used(VCLOCK_PVCLOCK));
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pvti_cpu0_va = pvti;
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}
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struct pvclock_vsyscall_time_info *pvclock_get_pvti_cpu0_va(void)
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{
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return pvti_cpu0_va;
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}
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EXPORT_SYMBOL_GPL(pvclock_get_pvti_cpu0_va);
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@ -49,7 +49,7 @@
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static struct gnttab_vm_area {
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struct vm_struct *area;
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pte_t **ptes;
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} gnttab_shared_vm_area;
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} gnttab_shared_vm_area, gnttab_status_vm_area;
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int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
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unsigned long max_nr_gframes,
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@ -73,16 +73,43 @@ int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
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return 0;
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}
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void arch_gnttab_unmap(void *shared, unsigned long nr_gframes)
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int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
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unsigned long max_nr_gframes,
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grant_status_t **__shared)
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{
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grant_status_t *shared = *__shared;
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unsigned long addr;
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unsigned long i;
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if (shared == NULL)
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*__shared = shared = gnttab_status_vm_area.area->addr;
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addr = (unsigned long)shared;
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for (i = 0; i < nr_gframes; i++) {
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set_pte_at(&init_mm, addr, gnttab_shared_vm_area.ptes[i],
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__pte(0));
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set_pte_at(&init_mm, addr, gnttab_status_vm_area.ptes[i],
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mfn_pte(frames[i], PAGE_KERNEL));
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addr += PAGE_SIZE;
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}
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return 0;
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}
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void arch_gnttab_unmap(void *shared, unsigned long nr_gframes)
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{
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pte_t **ptes;
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unsigned long addr;
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unsigned long i;
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if (shared == gnttab_status_vm_area.area->addr)
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ptes = gnttab_status_vm_area.ptes;
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else
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ptes = gnttab_shared_vm_area.ptes;
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addr = (unsigned long)shared;
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for (i = 0; i < nr_gframes; i++) {
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set_pte_at(&init_mm, addr, ptes[i], __pte(0));
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addr += PAGE_SIZE;
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}
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}
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@ -102,12 +129,35 @@ static int arch_gnttab_valloc(struct gnttab_vm_area *area, unsigned nr_frames)
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return 0;
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}
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int arch_gnttab_init(unsigned long nr_shared)
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static void arch_gnttab_vfree(struct gnttab_vm_area *area)
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{
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free_vm_area(area->area);
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kfree(area->ptes);
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}
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int arch_gnttab_init(unsigned long nr_shared, unsigned long nr_status)
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{
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int ret;
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if (!xen_pv_domain())
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return 0;
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return arch_gnttab_valloc(&gnttab_shared_vm_area, nr_shared);
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ret = arch_gnttab_valloc(&gnttab_shared_vm_area, nr_shared);
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if (ret < 0)
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return ret;
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/*
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* Always allocate the space for the status frames in case
|
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* we're migrated to a host with V2 support.
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*/
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ret = arch_gnttab_valloc(&gnttab_status_vm_area, nr_status);
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if (ret < 0)
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goto err;
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return 0;
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err:
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arch_gnttab_vfree(&gnttab_shared_vm_area);
|
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return -ENOMEM;
|
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}
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#ifdef CONFIG_XEN_PVH
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|
|
|
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@ -172,6 +172,9 @@ int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
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pgprot_t prot, unsigned domid,
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struct page **pages)
|
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{
|
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if (xen_feature(XENFEAT_auto_translated_physmap))
|
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return -EOPNOTSUPP;
|
||||
|
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return do_remap_gfn(vma, addr, &gfn, nr, NULL, prot, domid, pages);
|
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}
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EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_range);
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|
|
@ -182,6 +185,10 @@ int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
|
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int *err_ptr, pgprot_t prot,
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unsigned domid, struct page **pages)
|
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{
|
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if (xen_feature(XENFEAT_auto_translated_physmap))
|
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return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
|
||||
prot, domid, pages);
|
||||
|
||||
/* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
|
||||
* and the consequences later is quite hard to detect what the actual
|
||||
* cause of "wrong memory was mapped in".
|
||||
|
|
@ -193,9 +200,12 @@ EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_array);
|
|||
|
||||
/* Returns: 0 success */
|
||||
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
|
||||
int numpgs, struct page **pages)
|
||||
int nr, struct page **pages)
|
||||
{
|
||||
if (!pages || !xen_feature(XENFEAT_auto_translated_physmap))
|
||||
if (xen_feature(XENFEAT_auto_translated_physmap))
|
||||
return xen_xlate_unmap_gfn_range(vma, nr, pages);
|
||||
|
||||
if (!pages)
|
||||
return 0;
|
||||
|
||||
return -EINVAL;
|
||||
|
|
|
|||
|
|
@ -315,7 +315,7 @@ void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
|
|||
static pteval_t pte_mfn_to_pfn(pteval_t val)
|
||||
{
|
||||
if (val & _PAGE_PRESENT) {
|
||||
unsigned long mfn = (val & PTE_PFN_MASK) >> PAGE_SHIFT;
|
||||
unsigned long mfn = (val & XEN_PTE_MFN_MASK) >> PAGE_SHIFT;
|
||||
unsigned long pfn = mfn_to_pfn(mfn);
|
||||
|
||||
pteval_t flags = val & PTE_FLAGS_MASK;
|
||||
|
|
@ -1721,7 +1721,7 @@ static unsigned long __init m2p(phys_addr_t maddr)
|
|||
{
|
||||
phys_addr_t paddr;
|
||||
|
||||
maddr &= PTE_PFN_MASK;
|
||||
maddr &= XEN_PTE_MFN_MASK;
|
||||
paddr = mfn_to_pfn(maddr >> PAGE_SHIFT) << PAGE_SHIFT;
|
||||
|
||||
return paddr;
|
||||
|
|
|
|||
|
|
@ -17,6 +17,8 @@
|
|||
|
||||
void xen_arch_pre_suspend(void)
|
||||
{
|
||||
xen_save_time_memory_area();
|
||||
|
||||
if (xen_pv_domain())
|
||||
xen_pv_pre_suspend();
|
||||
}
|
||||
|
|
@ -27,6 +29,8 @@ void xen_arch_post_suspend(int cancelled)
|
|||
xen_pv_post_suspend(cancelled);
|
||||
else
|
||||
xen_hvm_post_suspend(cancelled);
|
||||
|
||||
xen_restore_time_memory_area();
|
||||
}
|
||||
|
||||
static void xen_vcpu_notify_restore(void *data)
|
||||
|
|
|
|||
|
|
@ -75,7 +75,7 @@ static void xen_get_wallclock(struct timespec *now)
|
|||
|
||||
static int xen_set_wallclock(const struct timespec *now)
|
||||
{
|
||||
return -1;
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
static int xen_pvclock_gtod_notify(struct notifier_block *nb,
|
||||
|
|
@ -371,8 +371,95 @@ static const struct pv_time_ops xen_time_ops __initconst = {
|
|||
.steal_clock = xen_steal_clock,
|
||||
};
|
||||
|
||||
static struct pvclock_vsyscall_time_info *xen_clock __read_mostly;
|
||||
|
||||
void xen_save_time_memory_area(void)
|
||||
{
|
||||
struct vcpu_register_time_memory_area t;
|
||||
int ret;
|
||||
|
||||
if (!xen_clock)
|
||||
return;
|
||||
|
||||
t.addr.v = NULL;
|
||||
|
||||
ret = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_time_memory_area, 0, &t);
|
||||
if (ret != 0)
|
||||
pr_notice("Cannot save secondary vcpu_time_info (err %d)",
|
||||
ret);
|
||||
else
|
||||
clear_page(xen_clock);
|
||||
}
|
||||
|
||||
void xen_restore_time_memory_area(void)
|
||||
{
|
||||
struct vcpu_register_time_memory_area t;
|
||||
int ret;
|
||||
|
||||
if (!xen_clock)
|
||||
return;
|
||||
|
||||
t.addr.v = &xen_clock->pvti;
|
||||
|
||||
ret = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_time_memory_area, 0, &t);
|
||||
|
||||
/*
|
||||
* We don't disable VCLOCK_PVCLOCK entirely if it fails to register the
|
||||
* secondary time info with Xen or if we migrated to a host without the
|
||||
* necessary flags. On both of these cases what happens is either
|
||||
* process seeing a zeroed out pvti or seeing no PVCLOCK_TSC_STABLE_BIT
|
||||
* bit set. Userspace checks the latter and if 0, it discards the data
|
||||
* in pvti and fallbacks to a system call for a reliable timestamp.
|
||||
*/
|
||||
if (ret != 0)
|
||||
pr_notice("Cannot restore secondary vcpu_time_info (err %d)",
|
||||
ret);
|
||||
}
|
||||
|
||||
static void xen_setup_vsyscall_time_info(void)
|
||||
{
|
||||
struct vcpu_register_time_memory_area t;
|
||||
struct pvclock_vsyscall_time_info *ti;
|
||||
int ret;
|
||||
|
||||
ti = (struct pvclock_vsyscall_time_info *)get_zeroed_page(GFP_KERNEL);
|
||||
if (!ti)
|
||||
return;
|
||||
|
||||
t.addr.v = &ti->pvti;
|
||||
|
||||
ret = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_time_memory_area, 0, &t);
|
||||
if (ret) {
|
||||
pr_notice("xen: VCLOCK_PVCLOCK not supported (err %d)\n", ret);
|
||||
free_page((unsigned long)ti);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* If primary time info had this bit set, secondary should too since
|
||||
* it's the same data on both just different memory regions. But we
|
||||
* still check it in case hypervisor is buggy.
|
||||
*/
|
||||
if (!(ti->pvti.flags & PVCLOCK_TSC_STABLE_BIT)) {
|
||||
t.addr.v = NULL;
|
||||
ret = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_time_memory_area,
|
||||
0, &t);
|
||||
if (!ret)
|
||||
free_page((unsigned long)ti);
|
||||
|
||||
pr_notice("xen: VCLOCK_PVCLOCK not supported (tsc unstable)\n");
|
||||
return;
|
||||
}
|
||||
|
||||
xen_clock = ti;
|
||||
pvclock_set_pvti_cpu0_va(xen_clock);
|
||||
|
||||
xen_clocksource.archdata.vclock_mode = VCLOCK_PVCLOCK;
|
||||
}
|
||||
|
||||
static void __init xen_time_init(void)
|
||||
{
|
||||
struct pvclock_vcpu_time_info *pvti;
|
||||
int cpu = smp_processor_id();
|
||||
struct timespec tp;
|
||||
|
||||
|
|
@ -396,6 +483,16 @@ static void __init xen_time_init(void)
|
|||
|
||||
setup_force_cpu_cap(X86_FEATURE_TSC);
|
||||
|
||||
/*
|
||||
* We check ahead on the primary time info if this
|
||||
* bit is supported hence speeding up Xen clocksource.
|
||||
*/
|
||||
pvti = &__this_cpu_read(xen_vcpu)->time;
|
||||
if (pvti->flags & PVCLOCK_TSC_STABLE_BIT) {
|
||||
pvclock_set_flags(PVCLOCK_TSC_STABLE_BIT);
|
||||
xen_setup_vsyscall_time_info();
|
||||
}
|
||||
|
||||
xen_setup_runstate_info(cpu);
|
||||
xen_setup_timer(cpu);
|
||||
xen_setup_cpu_clockevents();
|
||||
|
|
|
|||
|
|
@ -70,6 +70,8 @@ void xen_setup_runstate_info(int cpu);
|
|||
void xen_teardown_timer(int cpu);
|
||||
u64 xen_clocksource_read(void);
|
||||
void xen_setup_cpu_clockevents(void);
|
||||
void xen_save_time_memory_area(void);
|
||||
void xen_restore_time_memory_area(void);
|
||||
void __init xen_init_time_ops(void);
|
||||
void __init xen_hvm_init_time_ops(void);
|
||||
|
||||
|
|
|
|||
|
|
@ -178,8 +178,11 @@ static int __init ptp_kvm_init(void)
|
|||
{
|
||||
long ret;
|
||||
|
||||
if (!kvm_para_available())
|
||||
return -ENODEV;
|
||||
|
||||
clock_pair_gpa = slow_virt_to_phys(&clock_pair);
|
||||
hv_clock = pvclock_pvti_cpu0_va();
|
||||
hv_clock = pvclock_get_pvti_cpu0_va();
|
||||
|
||||
if (!hv_clock)
|
||||
return -ENODEV;
|
||||
|
|
|
|||
|
|
@ -196,6 +196,17 @@ config XEN_PCIDEV_BACKEND
|
|||
|
||||
If in doubt, say m.
|
||||
|
||||
config XEN_PVCALLS_FRONTEND
|
||||
tristate "XEN PV Calls frontend driver"
|
||||
depends on INET && XEN
|
||||
default n
|
||||
select XEN_XENBUS_FRONTEND
|
||||
help
|
||||
Experimental frontend for the Xen PV Calls protocol
|
||||
(https://xenbits.xen.org/docs/unstable/misc/pvcalls.html). It
|
||||
sends a small set of POSIX calls to the backend, which
|
||||
implements them.
|
||||
|
||||
config XEN_PVCALLS_BACKEND
|
||||
bool "XEN PV Calls backend driver"
|
||||
depends on INET && XEN && XEN_BACKEND
|
||||
|
|
|
|||
|
|
@ -37,6 +37,7 @@ obj-$(CONFIG_XEN_EFI) += efi.o
|
|||
obj-$(CONFIG_XEN_SCSI_BACKEND) += xen-scsiback.o
|
||||
obj-$(CONFIG_XEN_AUTO_XLATE) += xlate_mmu.o
|
||||
obj-$(CONFIG_XEN_PVCALLS_BACKEND) += pvcalls-back.o
|
||||
obj-$(CONFIG_XEN_PVCALLS_FRONTEND) += pvcalls-front.o
|
||||
xen-evtchn-y := evtchn.o
|
||||
xen-gntdev-y := gntdev.o
|
||||
xen-gntalloc-y := gntalloc.o
|
||||
|
|
|
|||
|
|
@ -33,6 +33,7 @@
|
|||
|
||||
#define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/bootmem.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/slab.h>
|
||||
|
|
@ -43,6 +44,7 @@
|
|||
#include <linux/hardirq.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/ratelimit.h>
|
||||
#include <linux/moduleparam.h>
|
||||
|
||||
#include <xen/xen.h>
|
||||
#include <xen/interface/xen.h>
|
||||
|
|
@ -52,6 +54,9 @@
|
|||
#include <xen/hvc-console.h>
|
||||
#include <xen/swiotlb-xen.h>
|
||||
#include <xen/balloon.h>
|
||||
#ifdef CONFIG_X86
|
||||
#include <asm/xen/cpuid.h>
|
||||
#endif
|
||||
#include <asm/xen/hypercall.h>
|
||||
#include <asm/xen/interface.h>
|
||||
|
||||
|
|
@ -68,14 +73,25 @@ static int gnttab_free_count;
|
|||
static grant_ref_t gnttab_free_head;
|
||||
static DEFINE_SPINLOCK(gnttab_list_lock);
|
||||
struct grant_frames xen_auto_xlat_grant_frames;
|
||||
static unsigned int xen_gnttab_version;
|
||||
module_param_named(version, xen_gnttab_version, uint, 0);
|
||||
|
||||
static union {
|
||||
struct grant_entry_v1 *v1;
|
||||
union grant_entry_v2 *v2;
|
||||
void *addr;
|
||||
} gnttab_shared;
|
||||
|
||||
/*This is a structure of function pointers for grant table*/
|
||||
struct gnttab_ops {
|
||||
/*
|
||||
* Version of the grant interface.
|
||||
*/
|
||||
unsigned int version;
|
||||
/*
|
||||
* Grant refs per grant frame.
|
||||
*/
|
||||
unsigned int grefs_per_grant_frame;
|
||||
/*
|
||||
* Mapping a list of frames for storing grant entries. Frames parameter
|
||||
* is used to store grant table address when grant table being setup,
|
||||
|
|
@ -130,14 +146,15 @@ struct unmap_refs_callback_data {
|
|||
|
||||
static const struct gnttab_ops *gnttab_interface;
|
||||
|
||||
static int grant_table_version;
|
||||
static int grefs_per_grant_frame;
|
||||
/* This reflects status of grant entries, so act as a global value. */
|
||||
static grant_status_t *grstatus;
|
||||
|
||||
static struct gnttab_free_callback *gnttab_free_callback_list;
|
||||
|
||||
static int gnttab_expand(unsigned int req_entries);
|
||||
|
||||
#define RPP (PAGE_SIZE / sizeof(grant_ref_t))
|
||||
#define SPP (PAGE_SIZE / sizeof(grant_status_t))
|
||||
|
||||
static inline grant_ref_t *__gnttab_entry(grant_ref_t entry)
|
||||
{
|
||||
|
|
@ -210,7 +227,7 @@ static void put_free_entry(grant_ref_t ref)
|
|||
}
|
||||
|
||||
/*
|
||||
* Following applies to gnttab_update_entry_v1.
|
||||
* Following applies to gnttab_update_entry_v1 and gnttab_update_entry_v2.
|
||||
* Introducing a valid entry into the grant table:
|
||||
* 1. Write ent->domid.
|
||||
* 2. Write ent->frame:
|
||||
|
|
@ -229,6 +246,15 @@ static void gnttab_update_entry_v1(grant_ref_t ref, domid_t domid,
|
|||
gnttab_shared.v1[ref].flags = flags;
|
||||
}
|
||||
|
||||
static void gnttab_update_entry_v2(grant_ref_t ref, domid_t domid,
|
||||
unsigned long frame, unsigned int flags)
|
||||
{
|
||||
gnttab_shared.v2[ref].hdr.domid = domid;
|
||||
gnttab_shared.v2[ref].full_page.frame = frame;
|
||||
wmb(); /* Hypervisor concurrent accesses. */
|
||||
gnttab_shared.v2[ref].hdr.flags = GTF_permit_access | flags;
|
||||
}
|
||||
|
||||
/*
|
||||
* Public grant-issuing interface functions
|
||||
*/
|
||||
|
|
@ -260,6 +286,11 @@ static int gnttab_query_foreign_access_v1(grant_ref_t ref)
|
|||
return gnttab_shared.v1[ref].flags & (GTF_reading|GTF_writing);
|
||||
}
|
||||
|
||||
static int gnttab_query_foreign_access_v2(grant_ref_t ref)
|
||||
{
|
||||
return grstatus[ref] & (GTF_reading|GTF_writing);
|
||||
}
|
||||
|
||||
int gnttab_query_foreign_access(grant_ref_t ref)
|
||||
{
|
||||
return gnttab_interface->query_foreign_access(ref);
|
||||
|
|
@ -282,6 +313,29 @@ static int gnttab_end_foreign_access_ref_v1(grant_ref_t ref, int readonly)
|
|||
return 1;
|
||||
}
|
||||
|
||||
static int gnttab_end_foreign_access_ref_v2(grant_ref_t ref, int readonly)
|
||||
{
|
||||
gnttab_shared.v2[ref].hdr.flags = 0;
|
||||
mb(); /* Concurrent access by hypervisor. */
|
||||
if (grstatus[ref] & (GTF_reading|GTF_writing)) {
|
||||
return 0;
|
||||
} else {
|
||||
/*
|
||||
* The read of grstatus needs to have acquire semantics.
|
||||
* On x86, reads already have that, and we just need to
|
||||
* protect against compiler reorderings.
|
||||
* On other architectures we may need a full barrier.
|
||||
*/
|
||||
#ifdef CONFIG_X86
|
||||
barrier();
|
||||
#else
|
||||
mb();
|
||||
#endif
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static inline int _gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)
|
||||
{
|
||||
return gnttab_interface->end_foreign_access_ref(ref, readonly);
|
||||
|
|
@ -442,6 +496,37 @@ static unsigned long gnttab_end_foreign_transfer_ref_v1(grant_ref_t ref)
|
|||
return frame;
|
||||
}
|
||||
|
||||
static unsigned long gnttab_end_foreign_transfer_ref_v2(grant_ref_t ref)
|
||||
{
|
||||
unsigned long frame;
|
||||
u16 flags;
|
||||
u16 *pflags;
|
||||
|
||||
pflags = &gnttab_shared.v2[ref].hdr.flags;
|
||||
|
||||
/*
|
||||
* If a transfer is not even yet started, try to reclaim the grant
|
||||
* reference and return failure (== 0).
|
||||
*/
|
||||
while (!((flags = *pflags) & GTF_transfer_committed)) {
|
||||
if (sync_cmpxchg(pflags, flags, 0) == flags)
|
||||
return 0;
|
||||
cpu_relax();
|
||||
}
|
||||
|
||||
/* If a transfer is in progress then wait until it is completed. */
|
||||
while (!(flags & GTF_transfer_completed)) {
|
||||
flags = *pflags;
|
||||
cpu_relax();
|
||||
}
|
||||
|
||||
rmb(); /* Read the frame number /after/ reading completion status. */
|
||||
frame = gnttab_shared.v2[ref].full_page.frame;
|
||||
BUG_ON(frame == 0);
|
||||
|
||||
return frame;
|
||||
}
|
||||
|
||||
unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref)
|
||||
{
|
||||
return gnttab_interface->end_foreign_transfer_ref(ref);
|
||||
|
|
@ -563,19 +648,26 @@ void gnttab_cancel_free_callback(struct gnttab_free_callback *callback)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(gnttab_cancel_free_callback);
|
||||
|
||||
static unsigned int gnttab_frames(unsigned int frames, unsigned int align)
|
||||
{
|
||||
return (frames * gnttab_interface->grefs_per_grant_frame + align - 1) /
|
||||
align;
|
||||
}
|
||||
|
||||
static int grow_gnttab_list(unsigned int more_frames)
|
||||
{
|
||||
unsigned int new_nr_grant_frames, extra_entries, i;
|
||||
unsigned int nr_glist_frames, new_nr_glist_frames;
|
||||
unsigned int grefs_per_frame;
|
||||
|
||||
BUG_ON(grefs_per_grant_frame == 0);
|
||||
BUG_ON(gnttab_interface == NULL);
|
||||
grefs_per_frame = gnttab_interface->grefs_per_grant_frame;
|
||||
|
||||
new_nr_grant_frames = nr_grant_frames + more_frames;
|
||||
extra_entries = more_frames * grefs_per_grant_frame;
|
||||
extra_entries = more_frames * grefs_per_frame;
|
||||
|
||||
nr_glist_frames = (nr_grant_frames * grefs_per_grant_frame + RPP - 1) / RPP;
|
||||
new_nr_glist_frames =
|
||||
(new_nr_grant_frames * grefs_per_grant_frame + RPP - 1) / RPP;
|
||||
nr_glist_frames = gnttab_frames(nr_grant_frames, RPP);
|
||||
new_nr_glist_frames = gnttab_frames(new_nr_grant_frames, RPP);
|
||||
for (i = nr_glist_frames; i < new_nr_glist_frames; i++) {
|
||||
gnttab_list[i] = (grant_ref_t *)__get_free_page(GFP_ATOMIC);
|
||||
if (!gnttab_list[i])
|
||||
|
|
@ -583,12 +675,12 @@ static int grow_gnttab_list(unsigned int more_frames)
|
|||
}
|
||||
|
||||
|
||||
for (i = grefs_per_grant_frame * nr_grant_frames;
|
||||
i < grefs_per_grant_frame * new_nr_grant_frames - 1; i++)
|
||||
for (i = grefs_per_frame * nr_grant_frames;
|
||||
i < grefs_per_frame * new_nr_grant_frames - 1; i++)
|
||||
gnttab_entry(i) = i + 1;
|
||||
|
||||
gnttab_entry(i) = gnttab_free_head;
|
||||
gnttab_free_head = grefs_per_grant_frame * nr_grant_frames;
|
||||
gnttab_free_head = grefs_per_frame * nr_grant_frames;
|
||||
gnttab_free_count += extra_entries;
|
||||
|
||||
nr_grant_frames = new_nr_grant_frames;
|
||||
|
|
@ -938,6 +1030,12 @@ int gnttab_unmap_refs_sync(struct gntab_unmap_queue_data *item)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(gnttab_unmap_refs_sync);
|
||||
|
||||
static unsigned int nr_status_frames(unsigned int nr_grant_frames)
|
||||
{
|
||||
BUG_ON(gnttab_interface == NULL);
|
||||
return gnttab_frames(nr_grant_frames, SPP);
|
||||
}
|
||||
|
||||
static int gnttab_map_frames_v1(xen_pfn_t *frames, unsigned int nr_gframes)
|
||||
{
|
||||
int rc;
|
||||
|
|
@ -955,6 +1053,55 @@ static void gnttab_unmap_frames_v1(void)
|
|||
arch_gnttab_unmap(gnttab_shared.addr, nr_grant_frames);
|
||||
}
|
||||
|
||||
static int gnttab_map_frames_v2(xen_pfn_t *frames, unsigned int nr_gframes)
|
||||
{
|
||||
uint64_t *sframes;
|
||||
unsigned int nr_sframes;
|
||||
struct gnttab_get_status_frames getframes;
|
||||
int rc;
|
||||
|
||||
nr_sframes = nr_status_frames(nr_gframes);
|
||||
|
||||
/* No need for kzalloc as it is initialized in following hypercall
|
||||
* GNTTABOP_get_status_frames.
|
||||
*/
|
||||
sframes = kmalloc_array(nr_sframes, sizeof(uint64_t), GFP_ATOMIC);
|
||||
if (!sframes)
|
||||
return -ENOMEM;
|
||||
|
||||
getframes.dom = DOMID_SELF;
|
||||
getframes.nr_frames = nr_sframes;
|
||||
set_xen_guest_handle(getframes.frame_list, sframes);
|
||||
|
||||
rc = HYPERVISOR_grant_table_op(GNTTABOP_get_status_frames,
|
||||
&getframes, 1);
|
||||
if (rc == -ENOSYS) {
|
||||
kfree(sframes);
|
||||
return -ENOSYS;
|
||||
}
|
||||
|
||||
BUG_ON(rc || getframes.status);
|
||||
|
||||
rc = arch_gnttab_map_status(sframes, nr_sframes,
|
||||
nr_status_frames(gnttab_max_grant_frames()),
|
||||
&grstatus);
|
||||
BUG_ON(rc);
|
||||
kfree(sframes);
|
||||
|
||||
rc = arch_gnttab_map_shared(frames, nr_gframes,
|
||||
gnttab_max_grant_frames(),
|
||||
&gnttab_shared.addr);
|
||||
BUG_ON(rc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void gnttab_unmap_frames_v2(void)
|
||||
{
|
||||
arch_gnttab_unmap(gnttab_shared.addr, nr_grant_frames);
|
||||
arch_gnttab_unmap(grstatus, nr_status_frames(nr_grant_frames));
|
||||
}
|
||||
|
||||
static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
|
||||
{
|
||||
struct gnttab_setup_table setup;
|
||||
|
|
@ -1014,6 +1161,9 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
|
|||
}
|
||||
|
||||
static const struct gnttab_ops gnttab_v1_ops = {
|
||||
.version = 1,
|
||||
.grefs_per_grant_frame = XEN_PAGE_SIZE /
|
||||
sizeof(struct grant_entry_v1),
|
||||
.map_frames = gnttab_map_frames_v1,
|
||||
.unmap_frames = gnttab_unmap_frames_v1,
|
||||
.update_entry = gnttab_update_entry_v1,
|
||||
|
|
@ -1022,14 +1172,56 @@ static const struct gnttab_ops gnttab_v1_ops = {
|
|||
.query_foreign_access = gnttab_query_foreign_access_v1,
|
||||
};
|
||||
|
||||
static const struct gnttab_ops gnttab_v2_ops = {
|
||||
.version = 2,
|
||||
.grefs_per_grant_frame = XEN_PAGE_SIZE /
|
||||
sizeof(union grant_entry_v2),
|
||||
.map_frames = gnttab_map_frames_v2,
|
||||
.unmap_frames = gnttab_unmap_frames_v2,
|
||||
.update_entry = gnttab_update_entry_v2,
|
||||
.end_foreign_access_ref = gnttab_end_foreign_access_ref_v2,
|
||||
.end_foreign_transfer_ref = gnttab_end_foreign_transfer_ref_v2,
|
||||
.query_foreign_access = gnttab_query_foreign_access_v2,
|
||||
};
|
||||
|
||||
static bool gnttab_need_v2(void)
|
||||
{
|
||||
#ifdef CONFIG_X86
|
||||
uint32_t base, width;
|
||||
|
||||
if (xen_pv_domain()) {
|
||||
base = xen_cpuid_base();
|
||||
if (cpuid_eax(base) < 5)
|
||||
return false; /* Information not available, use V1. */
|
||||
width = cpuid_ebx(base + 5) &
|
||||
XEN_CPUID_MACHINE_ADDRESS_WIDTH_MASK;
|
||||
return width > 32 + PAGE_SHIFT;
|
||||
}
|
||||
#endif
|
||||
return !!(max_possible_pfn >> 32);
|
||||
}
|
||||
|
||||
static void gnttab_request_version(void)
|
||||
{
|
||||
/* Only version 1 is used, which will always be available. */
|
||||
grant_table_version = 1;
|
||||
grefs_per_grant_frame = XEN_PAGE_SIZE / sizeof(struct grant_entry_v1);
|
||||
gnttab_interface = &gnttab_v1_ops;
|
||||
long rc;
|
||||
struct gnttab_set_version gsv;
|
||||
|
||||
pr_info("Grant tables using version %d layout\n", grant_table_version);
|
||||
if (gnttab_need_v2())
|
||||
gsv.version = 2;
|
||||
else
|
||||
gsv.version = 1;
|
||||
|
||||
/* Boot parameter overrides automatic selection. */
|
||||
if (xen_gnttab_version >= 1 && xen_gnttab_version <= 2)
|
||||
gsv.version = xen_gnttab_version;
|
||||
|
||||
rc = HYPERVISOR_grant_table_op(GNTTABOP_set_version, &gsv, 1);
|
||||
if (rc == 0 && gsv.version == 2)
|
||||
gnttab_interface = &gnttab_v2_ops;
|
||||
else
|
||||
gnttab_interface = &gnttab_v1_ops;
|
||||
pr_info("Grant tables using version %d layout\n",
|
||||
gnttab_interface->version);
|
||||
}
|
||||
|
||||
static int gnttab_setup(void)
|
||||
|
|
@ -1069,10 +1261,10 @@ static int gnttab_expand(unsigned int req_entries)
|
|||
int rc;
|
||||
unsigned int cur, extra;
|
||||
|
||||
BUG_ON(grefs_per_grant_frame == 0);
|
||||
BUG_ON(gnttab_interface == NULL);
|
||||
cur = nr_grant_frames;
|
||||
extra = ((req_entries + (grefs_per_grant_frame-1)) /
|
||||
grefs_per_grant_frame);
|
||||
extra = ((req_entries + gnttab_interface->grefs_per_grant_frame - 1) /
|
||||
gnttab_interface->grefs_per_grant_frame);
|
||||
if (cur + extra > gnttab_max_grant_frames()) {
|
||||
pr_warn_ratelimited("xen/grant-table: max_grant_frames reached"
|
||||
" cur=%u extra=%u limit=%u"
|
||||
|
|
@ -1104,16 +1296,16 @@ int gnttab_init(void)
|
|||
/* Determine the maximum number of frames required for the
|
||||
* grant reference free list on the current hypervisor.
|
||||
*/
|
||||
BUG_ON(grefs_per_grant_frame == 0);
|
||||
BUG_ON(gnttab_interface == NULL);
|
||||
max_nr_glist_frames = (max_nr_grant_frames *
|
||||
grefs_per_grant_frame / RPP);
|
||||
gnttab_interface->grefs_per_grant_frame / RPP);
|
||||
|
||||
gnttab_list = kmalloc(max_nr_glist_frames * sizeof(grant_ref_t *),
|
||||
GFP_KERNEL);
|
||||
if (gnttab_list == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
nr_glist_frames = (nr_grant_frames * grefs_per_grant_frame + RPP - 1) / RPP;
|
||||
nr_glist_frames = gnttab_frames(nr_grant_frames, RPP);
|
||||
for (i = 0; i < nr_glist_frames; i++) {
|
||||
gnttab_list[i] = (grant_ref_t *)__get_free_page(GFP_KERNEL);
|
||||
if (gnttab_list[i] == NULL) {
|
||||
|
|
@ -1122,7 +1314,8 @@ int gnttab_init(void)
|
|||
}
|
||||
}
|
||||
|
||||
ret = arch_gnttab_init(max_nr_grant_frames);
|
||||
ret = arch_gnttab_init(max_nr_grant_frames,
|
||||
nr_status_frames(max_nr_grant_frames));
|
||||
if (ret < 0)
|
||||
goto ini_nomem;
|
||||
|
||||
|
|
@ -1131,7 +1324,8 @@ int gnttab_init(void)
|
|||
goto ini_nomem;
|
||||
}
|
||||
|
||||
nr_init_grefs = nr_grant_frames * grefs_per_grant_frame;
|
||||
nr_init_grefs = nr_grant_frames *
|
||||
gnttab_interface->grefs_per_grant_frame;
|
||||
|
||||
for (i = NR_RESERVED_ENTRIES; i < nr_init_grefs - 1; i++)
|
||||
gnttab_entry(i) = i + 1;
|
||||
|
|
|
|||
|
|
@ -72,18 +72,15 @@ static int xen_suspend(void *data)
|
|||
}
|
||||
|
||||
gnttab_suspend();
|
||||
xen_manage_runstate_time(-1);
|
||||
xen_arch_pre_suspend();
|
||||
|
||||
/*
|
||||
* This hypercall returns 1 if suspend was cancelled
|
||||
* or the domain was merely checkpointed, and 0 if it
|
||||
* is resuming in a new domain.
|
||||
*/
|
||||
si->cancelled = HYPERVISOR_suspend(xen_pv_domain()
|
||||
? virt_to_gfn(xen_start_info)
|
||||
: 0);
|
||||
|
||||
xen_arch_post_suspend(si->cancelled);
|
||||
xen_manage_runstate_time(si->cancelled ? 1 : 0);
|
||||
gnttab_resume();
|
||||
|
||||
if (!si->cancelled) {
|
||||
|
|
|
|||
|
|
@ -191,13 +191,10 @@ static int traverse_pages_block(unsigned nelem, size_t size,
|
|||
void *state)
|
||||
{
|
||||
void *pagedata;
|
||||
unsigned pageidx;
|
||||
int ret = 0;
|
||||
|
||||
BUG_ON(size > PAGE_SIZE);
|
||||
|
||||
pageidx = PAGE_SIZE;
|
||||
|
||||
while (nelem) {
|
||||
int nr = (PAGE_SIZE/size);
|
||||
struct page *page;
|
||||
|
|
|
|||
|
|
@ -1238,3 +1238,7 @@ static void __exit pvcalls_back_fin(void)
|
|||
}
|
||||
|
||||
module_exit(pvcalls_back_fin);
|
||||
|
||||
MODULE_DESCRIPTION("Xen PV Calls backend driver");
|
||||
MODULE_AUTHOR("Stefano Stabellini <sstabellini@kernel.org>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,28 @@
|
|||
#ifndef __PVCALLS_FRONT_H__
|
||||
#define __PVCALLS_FRONT_H__
|
||||
|
||||
#include <linux/net.h>
|
||||
|
||||
int pvcalls_front_socket(struct socket *sock);
|
||||
int pvcalls_front_connect(struct socket *sock, struct sockaddr *addr,
|
||||
int addr_len, int flags);
|
||||
int pvcalls_front_bind(struct socket *sock,
|
||||
struct sockaddr *addr,
|
||||
int addr_len);
|
||||
int pvcalls_front_listen(struct socket *sock, int backlog);
|
||||
int pvcalls_front_accept(struct socket *sock,
|
||||
struct socket *newsock,
|
||||
int flags);
|
||||
int pvcalls_front_sendmsg(struct socket *sock,
|
||||
struct msghdr *msg,
|
||||
size_t len);
|
||||
int pvcalls_front_recvmsg(struct socket *sock,
|
||||
struct msghdr *msg,
|
||||
size_t len,
|
||||
int flags);
|
||||
unsigned int pvcalls_front_poll(struct file *file,
|
||||
struct socket *sock,
|
||||
poll_table *wait);
|
||||
int pvcalls_front_release(struct socket *sock);
|
||||
|
||||
#endif
|
||||
|
|
@ -6,6 +6,7 @@
|
|||
#include <linux/kernel_stat.h>
|
||||
#include <linux/math64.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include <asm/paravirt.h>
|
||||
#include <asm/xen/hypervisor.h>
|
||||
|
|
@ -20,6 +21,8 @@
|
|||
/* runstate info updated by Xen */
|
||||
static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate);
|
||||
|
||||
static DEFINE_PER_CPU(u64[4], old_runstate_time);
|
||||
|
||||
/* return an consistent snapshot of 64-bit time/counter value */
|
||||
static u64 get64(const u64 *p)
|
||||
{
|
||||
|
|
@ -48,8 +51,8 @@ static u64 get64(const u64 *p)
|
|||
return ret;
|
||||
}
|
||||
|
||||
static void xen_get_runstate_snapshot_cpu(struct vcpu_runstate_info *res,
|
||||
unsigned int cpu)
|
||||
static void xen_get_runstate_snapshot_cpu_delta(
|
||||
struct vcpu_runstate_info *res, unsigned int cpu)
|
||||
{
|
||||
u64 state_time;
|
||||
struct vcpu_runstate_info *state;
|
||||
|
|
@ -67,6 +70,71 @@ static void xen_get_runstate_snapshot_cpu(struct vcpu_runstate_info *res,
|
|||
(state_time & XEN_RUNSTATE_UPDATE));
|
||||
}
|
||||
|
||||
static void xen_get_runstate_snapshot_cpu(struct vcpu_runstate_info *res,
|
||||
unsigned int cpu)
|
||||
{
|
||||
int i;
|
||||
|
||||
xen_get_runstate_snapshot_cpu_delta(res, cpu);
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
res->time[i] += per_cpu(old_runstate_time, cpu)[i];
|
||||
}
|
||||
|
||||
void xen_manage_runstate_time(int action)
|
||||
{
|
||||
static struct vcpu_runstate_info *runstate_delta;
|
||||
struct vcpu_runstate_info state;
|
||||
int cpu, i;
|
||||
|
||||
switch (action) {
|
||||
case -1: /* backup runstate time before suspend */
|
||||
if (unlikely(runstate_delta))
|
||||
pr_warn_once("%s: memory leak as runstate_delta is not NULL\n",
|
||||
__func__);
|
||||
|
||||
runstate_delta = kmalloc_array(num_possible_cpus(),
|
||||
sizeof(*runstate_delta),
|
||||
GFP_ATOMIC);
|
||||
if (unlikely(!runstate_delta)) {
|
||||
pr_warn("%s: failed to allocate runstate_delta\n",
|
||||
__func__);
|
||||
return;
|
||||
}
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
xen_get_runstate_snapshot_cpu_delta(&state, cpu);
|
||||
memcpy(runstate_delta[cpu].time, state.time,
|
||||
sizeof(runstate_delta[cpu].time));
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case 0: /* backup runstate time after resume */
|
||||
if (unlikely(!runstate_delta)) {
|
||||
pr_warn("%s: cannot accumulate runstate time as runstate_delta is NULL\n",
|
||||
__func__);
|
||||
return;
|
||||
}
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
for (i = 0; i < 4; i++)
|
||||
per_cpu(old_runstate_time, cpu)[i] +=
|
||||
runstate_delta[cpu].time[i];
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
default: /* do not accumulate runstate time for checkpointing */
|
||||
break;
|
||||
}
|
||||
|
||||
if (action != -1 && runstate_delta) {
|
||||
kfree(runstate_delta);
|
||||
runstate_delta = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Runstate accounting
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -379,10 +379,12 @@ static void xenbus_reset_frontend(char *fe, char *be, int be_state)
|
|||
case XenbusStateConnected:
|
||||
xenbus_printf(XBT_NIL, fe, "state", "%d", XenbusStateClosing);
|
||||
xenbus_reset_wait_for_backend(be, XenbusStateClosing);
|
||||
/* fall through */
|
||||
|
||||
case XenbusStateClosing:
|
||||
xenbus_printf(XBT_NIL, fe, "state", "%d", XenbusStateClosed);
|
||||
xenbus_reset_wait_for_backend(be, XenbusStateClosed);
|
||||
/* fall through */
|
||||
|
||||
case XenbusStateClosed:
|
||||
xenbus_printf(XBT_NIL, fe, "state", "%d", XenbusStateInitialising);
|
||||
|
|
|
|||
|
|
@ -174,10 +174,13 @@ gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, phys_addr_t addr,
|
|||
unmap->dev_bus_addr = 0;
|
||||
}
|
||||
|
||||
int arch_gnttab_init(unsigned long nr_shared);
|
||||
int arch_gnttab_init(unsigned long nr_shared, unsigned long nr_status);
|
||||
int arch_gnttab_map_shared(xen_pfn_t *frames, unsigned long nr_gframes,
|
||||
unsigned long max_nr_gframes,
|
||||
void **__shared);
|
||||
int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
|
||||
unsigned long max_nr_gframes,
|
||||
grant_status_t **__shared);
|
||||
void arch_gnttab_unmap(void *shared, unsigned long nr_gframes);
|
||||
|
||||
struct grant_frames {
|
||||
|
|
|
|||
|
|
@ -178,4 +178,46 @@ DEFINE_GUEST_HANDLE_STRUCT(vcpu_register_vcpu_info);
|
|||
|
||||
/* Send an NMI to the specified VCPU. @extra_arg == NULL. */
|
||||
#define VCPUOP_send_nmi 11
|
||||
|
||||
/*
|
||||
* Get the physical ID information for a pinned vcpu's underlying physical
|
||||
* processor. The physical ID informmation is architecture-specific.
|
||||
* On x86: id[31:0]=apic_id, id[63:32]=acpi_id.
|
||||
* This command returns -EINVAL if it is not a valid operation for this VCPU.
|
||||
*/
|
||||
#define VCPUOP_get_physid 12 /* arg == vcpu_get_physid_t */
|
||||
struct vcpu_get_physid {
|
||||
uint64_t phys_id;
|
||||
};
|
||||
DEFINE_GUEST_HANDLE_STRUCT(vcpu_get_physid);
|
||||
#define xen_vcpu_physid_to_x86_apicid(physid) ((uint32_t)(physid))
|
||||
#define xen_vcpu_physid_to_x86_acpiid(physid) ((uint32_t)((physid) >> 32))
|
||||
|
||||
/*
|
||||
* Register a memory location to get a secondary copy of the vcpu time
|
||||
* parameters. The master copy still exists as part of the vcpu shared
|
||||
* memory area, and this secondary copy is updated whenever the master copy
|
||||
* is updated (and using the same versioning scheme for synchronisation).
|
||||
*
|
||||
* The intent is that this copy may be mapped (RO) into userspace so
|
||||
* that usermode can compute system time using the time info and the
|
||||
* tsc. Usermode will see an array of vcpu_time_info structures, one
|
||||
* for each vcpu, and choose the right one by an existing mechanism
|
||||
* which allows it to get the current vcpu number (such as via a
|
||||
* segment limit). It can then apply the normal algorithm to compute
|
||||
* system time from the tsc.
|
||||
*
|
||||
* @extra_arg == pointer to vcpu_register_time_info_memory_area structure.
|
||||
*/
|
||||
#define VCPUOP_register_vcpu_time_memory_area 13
|
||||
DEFINE_GUEST_HANDLE_STRUCT(vcpu_time_info);
|
||||
struct vcpu_register_time_memory_area {
|
||||
union {
|
||||
GUEST_HANDLE(vcpu_time_info) h;
|
||||
struct pvclock_vcpu_time_info *v;
|
||||
uint64_t p;
|
||||
} addr;
|
||||
};
|
||||
DEFINE_GUEST_HANDLE_STRUCT(vcpu_register_time_memory_area);
|
||||
|
||||
#endif /* __XEN_PUBLIC_VCPU_H__ */
|
||||
|
|
|
|||
|
|
@ -33,6 +33,7 @@ void xen_resume_notifier_unregister(struct notifier_block *nb);
|
|||
bool xen_vcpu_stolen(int vcpu);
|
||||
void xen_setup_runstate_info(int cpu);
|
||||
void xen_time_setup_guest(void);
|
||||
void xen_manage_runstate_time(int action);
|
||||
void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
|
||||
u64 xen_steal_clock(int cpu);
|
||||
|
||||
|
|
@ -104,6 +105,8 @@ int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
|
|||
struct page **pages);
|
||||
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
|
||||
int numpgs, struct page **pages);
|
||||
|
||||
#ifdef CONFIG_XEN_AUTO_XLATE
|
||||
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
|
||||
unsigned long addr,
|
||||
xen_pfn_t *gfn, int nr,
|
||||
|
|
@ -112,6 +115,28 @@ int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
|
|||
struct page **pages);
|
||||
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
|
||||
int nr, struct page **pages);
|
||||
#else
|
||||
/*
|
||||
* These two functions are called from arch/x86/xen/mmu.c and so stubs
|
||||
* are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
|
||||
*/
|
||||
static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
|
||||
unsigned long addr,
|
||||
xen_pfn_t *gfn, int nr,
|
||||
int *err_ptr, pgprot_t prot,
|
||||
unsigned int domid,
|
||||
struct page **pages)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
|
||||
int nr, struct page **pages)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
#endif
|
||||
|
||||
int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
|
||||
unsigned long nr_grant_frames);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue