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Features: 

- Add necessary infrastructure to make balloon driver work under ARM.
  - Add /dev/xen/privcmd interfaces to work with ARM and PVH.
  - Improve Xen PCIBack wild-card parsing.
  - Add Xen ACPI PAD (Processor Aggregator) support - so can offline/online
    sockets depending on the power consumption.
  - PVHVM + kexec = use an E820_RESV region for the shared region so we don't
    overwrite said region during kexec reboot.
  - Cleanups, compile fixes.
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Merge tag 'stable/for-linus-3.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull Xen updates from Konrad Rzeszutek Wilk:
 - Add necessary infrastructure to make balloon driver work under ARM.
 - Add /dev/xen/privcmd interfaces to work with ARM and PVH.
 - Improve Xen PCIBack wild-card parsing.
 - Add Xen ACPI PAD (Processor Aggregator) support - so can offline/
   online sockets depending on the power consumption.
 - PVHVM + kexec = use an E820_RESV region for the shared region so we
   don't overwrite said region during kexec reboot.
 - Cleanups, compile fixes.

Fix up some trivial conflicts due to the balloon driver now working on
ARM, and there were changes next to the previous work-arounds that are
now gone.

* tag 'stable/for-linus-3.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/PVonHVM: fix compile warning in init_hvm_pv_info
  xen: arm: implement remap interfaces needed for privcmd mappings.
  xen: correctly use xen_pfn_t in remap_domain_mfn_range.
  xen: arm: enable balloon driver
  xen: balloon: allow PVMMU interfaces to be compiled out
  xen: privcmd: support autotranslated physmap guests.
  xen: add pages parameter to xen_remap_domain_mfn_range
  xen/acpi: Move the xen_running_on_version_or_later function.
  xen/xenbus: Remove duplicate inclusion of asm/xen/hypervisor.h
  xen/acpi: Fix compile error by missing decleration for xen_domain.
  xen/acpi: revert pad config check in xen_check_mwait
  xen/acpi: ACPI PAD driver
  xen-pciback: reject out of range inputs
  xen-pciback: simplify and tighten parsing of device IDs
  xen PVonHVM: use E820_Reserved area for shared_info
This commit is contained in:
Linus Torvalds 2012-12-13 14:29:16 -08:00
parent c7708fac5a 6a7ed40511
commit 896ea17d3d
18 changed files with 594 additions and 119 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/include/asm/xen/interface.h
View File

@ -49,6 +49,7 @@ DEFINE_GUEST_HANDLE(void);
DEFINE_GUEST_HANDLE(uint64_t);
DEFINE_GUEST_HANDLE(uint32_t);
DEFINE_GUEST_HANDLE(xen_pfn_t);
DEFINE_GUEST_HANDLE(xen_ulong_t);
/* Maximum number of virtual CPUs in multi-processor guests. */
#define MAX_VIRT_CPUS 1

123
arch/arm/xen/enlighten.c
View File

@ -8,6 +8,8 @@
#include <xen/features.h>
#include <xen/platform_pci.h>
#include <xen/xenbus.h>
#include <xen/page.h>
#include <xen/xen-ops.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
#include <linux/interrupt.h>
@ -17,6 +19,8 @@
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/mm.h>
struct start_info _xen_start_info;
struct start_info *xen_start_info = &_xen_start_info;
EXPORT_SYMBOL_GPL(xen_start_info);
@ -29,6 +33,10 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info;
DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
/* These are unused until we support booting "pre-ballooned" */
unsigned long xen_released_pages;
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
/* TODO: to be removed */
__read_mostly int xen_have_vector_callback;
EXPORT_SYMBOL_GPL(xen_have_vector_callback);
@ -38,15 +46,106 @@ EXPORT_SYMBOL_GPL(xen_platform_pci_unplug);
static __read_mostly int xen_events_irq = -1;
/* map fgmfn of domid to lpfn in the current domain */
static int map_foreign_page(unsigned long lpfn, unsigned long fgmfn,
unsigned int domid)
{
int rc;
struct xen_add_to_physmap_range xatp = {
.domid = DOMID_SELF,
.foreign_domid = domid,
.size = 1,
.space = XENMAPSPACE_gmfn_foreign,
};
xen_ulong_t idx = fgmfn;
xen_pfn_t gpfn = lpfn;
set_xen_guest_handle(xatp.idxs, &idx);
set_xen_guest_handle(xatp.gpfns, &gpfn);
rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp);
if (rc) {
pr_warn("Failed to map pfn to mfn rc:%d pfn:%lx mfn:%lx\n",
rc, lpfn, fgmfn);
return 1;
}
return 0;
}
struct remap_data {
xen_pfn_t fgmfn; /* foreign domain's gmfn */
pgprot_t prot;
domid_t domid;
struct vm_area_struct *vma;
int index;
struct page **pages;
struct xen_remap_mfn_info *info;
};
static int remap_pte_fn(pte_t *ptep, pgtable_t token, unsigned long addr,
void *data)
{
struct remap_data *info = data;
struct page *page = info->pages[info->index++];
unsigned long pfn = page_to_pfn(page);
pte_t pte = pfn_pte(pfn, info->prot);
if (map_foreign_page(pfn, info->fgmfn, info->domid))
return -EFAULT;
set_pte_at(info->vma->vm_mm, addr, ptep, pte);
return 0;
}
int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
unsigned long addr,
unsigned long mfn, int nr,
pgprot_t prot, unsigned domid)
xen_pfn_t mfn, int nr,
pgprot_t prot, unsigned domid,
struct page **pages)
{
return -ENOSYS;
int err;
struct remap_data data;
/* TBD: Batching, current sole caller only does page at a time */
if (nr > 1)
return -EINVAL;
data.fgmfn = mfn;
data.prot = prot;
data.domid = domid;
data.vma = vma;
data.index = 0;
data.pages = pages;
err = apply_to_page_range(vma->vm_mm, addr, nr << PAGE_SHIFT,
remap_pte_fn, &data);
return err;
}
EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
int nr, struct page **pages)
{
int i;
for (i = 0; i < nr; i++) {
struct xen_remove_from_physmap xrp;
unsigned long rc, pfn;
pfn = page_to_pfn(pages[i]);
xrp.domid = DOMID_SELF;
xrp.gpfn = pfn;
rc = HYPERVISOR_memory_op(XENMEM_remove_from_physmap, &xrp);
if (rc) {
pr_warn("Failed to unmap pfn:%lx rc:%ld\n",
pfn, rc);
return rc;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);
/*
* see Documentation/devicetree/bindings/arm/xen.txt for the
* documentation of the Xen Device Tree format.
@ -149,24 +248,6 @@ static int __init xen_init_events(void)
}
postcore_initcall(xen_init_events);
/* XXX: only until balloon is properly working */
int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)
{
*pages = alloc_pages(highmem ? GFP_HIGHUSER : GFP_KERNEL,
get_order(nr_pages));
if (*pages == NULL)
return -ENOMEM;
return 0;
}
EXPORT_SYMBOL_GPL(alloc_xenballooned_pages);
void free_xenballooned_pages(int nr_pages, struct page **pages)
{
kfree(*pages);
*pages = NULL;
}
EXPORT_SYMBOL_GPL(free_xenballooned_pages);
/* In the hypervisor.S file. */
EXPORT_SYMBOL_GPL(HYPERVISOR_event_channel_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_grant_table_op);

1
arch/x86/include/asm/xen/interface.h
View File

@ -63,6 +63,7 @@ DEFINE_GUEST_HANDLE(void);
DEFINE_GUEST_HANDLE(uint64_t);
DEFINE_GUEST_HANDLE(uint32_t);
DEFINE_GUEST_HANDLE(xen_pfn_t);
DEFINE_GUEST_HANDLE(xen_ulong_t);
#endif
#ifndef HYPERVISOR_VIRT_START

1
arch/x86/xen/Kconfig
View File

@ -6,6 +6,7 @@ config XEN
bool "Xen guest support"
select PARAVIRT
select PARAVIRT_CLOCK
select XEN_HAVE_PVMMU
depends on X86_64 || (X86_32 && X86_PAE && !X86_VISWS)
depends on X86_TSC
help

108
arch/x86/xen/enlighten.c
View File

@ -223,6 +223,21 @@ static void __init xen_banner(void)
version >> 16, version & 0xffff, extra.extraversion,
xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : "");
}
/* Check if running on Xen version (major, minor) or later */
bool
xen_running_on_version_or_later(unsigned int major, unsigned int minor)
{
unsigned int version;
if (!xen_domain())
return false;
version = HYPERVISOR_xen_version(XENVER_version, NULL);
if ((((version >> 16) == major) && ((version & 0xffff) >= minor)) ||
((version >> 16) > major))
return true;
return false;
}
#define CPUID_THERM_POWER_LEAF 6
#define APERFMPERF_PRESENT 0
@ -287,8 +302,7 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
static bool __init xen_check_mwait(void)
{
#if defined(CONFIG_ACPI) && !defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) && \
!defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
#ifdef CONFIG_ACPI
struct xen_platform_op op = {
.cmd = XENPF_set_processor_pminfo,
.u.set_pminfo.id = -1,
@ -309,6 +323,13 @@ static bool __init xen_check_mwait(void)
if (!xen_initial_domain())
return false;
/*
* When running under platform earlier than Xen4.2, do not expose
* mwait, to avoid the risk of loading native acpi pad driver
*/
if (!xen_running_on_version_or_later(4, 2))
return false;
ax = 1;
cx = 0;
@ -1495,51 +1516,72 @@ asmlinkage void __init xen_start_kernel(void)
#endif
}
void __ref xen_hvm_init_shared_info(void)
{
int cpu;
struct xen_add_to_physmap xatp;
static struct shared_info *shared_info_page = 0;
#ifdef CONFIG_XEN_PVHVM
#define HVM_SHARED_INFO_ADDR 0xFE700000UL
static struct shared_info *xen_hvm_shared_info;
static unsigned long xen_hvm_sip_phys;
static int xen_major, xen_minor;
static void xen_hvm_connect_shared_info(unsigned long pfn)
{
struct xen_add_to_physmap xatp;
if (!shared_info_page)
shared_info_page = (struct shared_info *)
extend_brk(PAGE_SIZE, PAGE_SIZE);
xatp.domid = DOMID_SELF;
xatp.idx = 0;
xatp.space = XENMAPSPACE_shared_info;
xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT;
xatp.gpfn = pfn;
if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
BUG();
HYPERVISOR_shared_info = (struct shared_info *)shared_info_page;
}
static void __init xen_hvm_set_shared_info(struct shared_info *sip)
{
int cpu;
HYPERVISOR_shared_info = sip;
/* xen_vcpu is a pointer to the vcpu_info struct in the shared_info
* page, we use it in the event channel upcall and in some pvclock
* related functions. We don't need the vcpu_info placement
* optimizations because we don't use any pv_mmu or pv_irq op on
* HVM.
* When xen_hvm_init_shared_info is run at boot time only vcpu 0 is
* online but xen_hvm_init_shared_info is run at resume time too and
* in that case multiple vcpus might be online. */
for_each_online_cpu(cpu) {
* HVM. */
for_each_online_cpu(cpu)
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
}
}
#ifdef CONFIG_XEN_PVHVM
/* Reconnect the shared_info pfn to a (new) mfn */
void xen_hvm_resume_shared_info(void)
{
xen_hvm_connect_shared_info(xen_hvm_sip_phys >> PAGE_SHIFT);
}
/* Xen tools prior to Xen 4 do not provide a E820_Reserved area for guest usage.
* On these old tools the shared info page will be placed in E820_Ram.
* Xen 4 provides a E820_Reserved area at 0xFC000000, and this code expects
* that nothing is mapped up to HVM_SHARED_INFO_ADDR.
* Xen 4.3+ provides an explicit 1MB area at HVM_SHARED_INFO_ADDR which is used
* here for the shared info page. */
static void __init xen_hvm_init_shared_info(void)
{
if (xen_major < 4) {
xen_hvm_shared_info = extend_brk(PAGE_SIZE, PAGE_SIZE);
xen_hvm_sip_phys = __pa(xen_hvm_shared_info);
} else {
xen_hvm_sip_phys = HVM_SHARED_INFO_ADDR;
set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_hvm_sip_phys);
xen_hvm_shared_info =
(struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
}
xen_hvm_connect_shared_info(xen_hvm_sip_phys >> PAGE_SHIFT);
xen_hvm_set_shared_info(xen_hvm_shared_info);
}
static void __init init_hvm_pv_info(void)
{
int major, minor;
uint32_t eax, ebx, ecx, edx, pages, msr, base;
uint32_t ecx, edx, pages, msr, base;
u64 pfn;
base = xen_cpuid_base();
cpuid(base + 1, &eax, &ebx, &ecx, &edx);
major = eax >> 16;
minor = eax & 0xffff;
printk(KERN_INFO "Xen version %d.%d.\n", major, minor);
cpuid(base + 2, &pages, &msr, &ecx, &edx);
pfn = __pa(hypercall_page);
@ -1590,12 +1632,22 @@ static void __init xen_hvm_guest_init(void)
static bool __init xen_hvm_platform(void)
{
uint32_t eax, ebx, ecx, edx, base;
if (xen_pv_domain())
return false;
if (!xen_cpuid_base())
base = xen_cpuid_base();
if (!base)
return false;
cpuid(base + 1, &eax, &ebx, &ecx, &edx);
xen_major = eax >> 16;
xen_minor = eax & 0xffff;
printk(KERN_INFO "Xen version %d.%d.\n", xen_major, xen_minor);
return true;
}

17
arch/x86/xen/mmu.c
View File

@ -2497,8 +2497,10 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token,
int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
unsigned long addr,
unsigned long mfn, int nr,
pgprot_t prot, unsigned domid)
xen_pfn_t mfn, int nr,
pgprot_t prot, unsigned domid,
struct page **pages)
{
struct remap_data rmd;
struct mmu_update mmu_update[REMAP_BATCH_SIZE];
@ -2542,3 +2544,14 @@ out:
return err;
}
EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
/* Returns: 0 success */
int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
int numpgs, struct page **pages)
{
if (!pages || !xen_feature(XENFEAT_auto_translated_physmap))
return 0;
return -EINVAL;
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);

2
arch/x86/xen/suspend.c
View File

@ -30,7 +30,7 @@ void xen_arch_hvm_post_suspend(int suspend_cancelled)
{
#ifdef CONFIG_XEN_PVHVM
int cpu;
xen_hvm_init_shared_info();
xen_hvm_resume_shared_info();
xen_callback_vector();
xen_unplug_emulated_devices();
if (xen_feature(XENFEAT_hvm_safe_pvclock)) {

2
arch/x86/xen/xen-ops.h
View File

@ -40,7 +40,7 @@ void xen_enable_syscall(void);
void xen_vcpu_restore(void);
void xen_callback_vector(void);
void xen_hvm_init_shared_info(void);
void xen_hvm_resume_shared_info(void);
void xen_unplug_emulated_devices(void);
void __init xen_build_dynamic_phys_to_machine(void);

3
drivers/xen/Kconfig
View File

@ -206,4 +206,7 @@ config XEN_MCE_LOG
Allow kernel fetching MCE error from Xen platform and
converting it into Linux mcelog format for mcelog tools
config XEN_HAVE_PVMMU
bool
endmenu

7
drivers/xen/Makefile
View File

@ -1,9 +1,9 @@
ifneq ($(CONFIG_ARM),y)
obj-y += manage.o balloon.o
obj-y += manage.o
obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
endif
obj-$(CONFIG_X86) += fallback.o
obj-y += grant-table.o features.o events.o
obj-y += grant-table.o features.o events.o balloon.o
obj-y += xenbus/
nostackp := $(call cc-option, -fno-stack-protector)
@ -11,7 +11,8 @@ CFLAGS_features.o := $(nostackp)
dom0-$(CONFIG_PCI) += pci.o
dom0-$(CONFIG_USB_SUPPORT) += dbgp.o
dom0-$(CONFIG_ACPI) += acpi.o
dom0-$(CONFIG_ACPI) += acpi.o $(xen-pad-y)
xen-pad-$(CONFIG_X86) += xen-acpi-pad.o
dom0-$(CONFIG_X86) += pcpu.o
obj-$(CONFIG_XEN_DOM0) += $(dom0-y)
obj-$(CONFIG_BLOCK) += biomerge.o

5
drivers/xen/balloon.c
View File

@ -359,6 +359,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages)
set_phys_to_machine(pfn, frame_list[i]);
#ifdef CONFIG_XEN_HAVE_PVMMU
/* Link back into the page tables if not highmem. */
if (xen_pv_domain() && !PageHighMem(page)) {
int ret;
@ -368,6 +369,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages)
0);
BUG_ON(ret);
}
#endif
/* Relinquish the page back to the allocator. */
ClearPageReserved(page);
@ -416,13 +418,14 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp)
scrub_page(page);
#ifdef CONFIG_XEN_HAVE_PVMMU
if (xen_pv_domain() && !PageHighMem(page)) {
ret = HYPERVISOR_update_va_mapping(
(unsigned long)__va(pfn << PAGE_SHIFT),
__pte_ma(0), 0);
BUG_ON(ret);
}
#endif
}
/* Ensure that ballooned highmem pages don't have kmaps. */

72
drivers/xen/privcmd.c
View File

@ -33,11 +33,14 @@
#include <xen/features.h>
#include <xen/page.h>
#include <xen/xen-ops.h>
#include <xen/balloon.h>
#include "privcmd.h"
MODULE_LICENSE("GPL");
#define PRIV_VMA_LOCKED ((void *)1)
#ifndef HAVE_ARCH_PRIVCMD_MMAP
static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma);
#endif
@ -178,7 +181,7 @@ static int mmap_mfn_range(void *data, void *state)
msg->va & PAGE_MASK,
msg->mfn, msg->npages,
vma->vm_page_prot,
st->domain);
st->domain, NULL);
if (rc < 0)
return rc;
@ -199,6 +202,10 @@ static long privcmd_ioctl_mmap(void __user *udata)
if (!xen_initial_domain())
return -EPERM;
/* We only support privcmd_ioctl_mmap_batch for auto translated. */
if (xen_feature(XENFEAT_auto_translated_physmap))
return -ENOSYS;
if (copy_from_user(&mmapcmd, udata, sizeof(mmapcmd)))
return -EFAULT;
@ -246,6 +253,7 @@ struct mmap_batch_state {
domid_t domain;
unsigned long va;
struct vm_area_struct *vma;
int index;
/* A tristate:
* 0 for no errors
* 1 if at least one error has happened (and no
@ -260,14 +268,24 @@ struct mmap_batch_state {
xen_pfn_t __user *user_mfn;
};
/* auto translated dom0 note: if domU being created is PV, then mfn is
* mfn(addr on bus). If it's auto xlated, then mfn is pfn (input to HAP).
*/
static int mmap_batch_fn(void *data, void *state)
{
xen_pfn_t *mfnp = data;
struct mmap_batch_state *st = state;
struct vm_area_struct *vma = st->vma;
struct page **pages = vma->vm_private_data;
struct page *cur_page = NULL;
int ret;
if (xen_feature(XENFEAT_auto_translated_physmap))
cur_page = pages[st->index++];
ret = xen_remap_domain_mfn_range(st->vma, st->va & PAGE_MASK, *mfnp, 1,
st->vma->vm_page_prot, st->domain);
st->vma->vm_page_prot, st->domain,
&cur_page);
/* Store error code for second pass. */
*(st->err++) = ret;
@ -303,6 +321,32 @@ static int mmap_return_errors_v1(void *data, void *state)
return __put_user(*mfnp, st->user_mfn++);
}
/* Allocate pfns that are then mapped with gmfns from foreign domid. Update
* the vma with the page info to use later.
* Returns: 0 if success, otherwise -errno
*/
static int alloc_empty_pages(struct vm_area_struct *vma, int numpgs)
{
int rc;
struct page **pages;
pages = kcalloc(numpgs, sizeof(pages[0]), GFP_KERNEL);
if (pages == NULL)
return -ENOMEM;
rc = alloc_xenballooned_pages(numpgs, pages, 0);
if (rc != 0) {
pr_warn("%s Could not alloc %d pfns rc:%d\n", __func__,
numpgs, rc);
kfree(pages);
return -ENOMEM;
}
BUG_ON(vma->vm_private_data != PRIV_VMA_LOCKED);
vma->vm_private_data = pages;
return 0;
}
static struct vm_operations_struct privcmd_vm_ops;
static long privcmd_ioctl_mmap_batch(void __user *udata, int version)
@ -370,10 +414,18 @@ static long privcmd_ioctl_mmap_batch(void __user *udata, int version)
ret = -EINVAL;
goto out;
}
if (xen_feature(XENFEAT_auto_translated_physmap)) {
ret = alloc_empty_pages(vma, m.num);
if (ret < 0) {
up_write(&mm->mmap_sem);
goto out;
}
}
state.domain = m.dom;
state.vma = vma;
state.va = m.addr;
state.index = 0;
state.global_error = 0;
state.err = err_array;
@ -442,6 +494,19 @@ static long privcmd_ioctl(struct file *file,
return ret;
}
static void privcmd_close(struct vm_area_struct *vma)
{
struct page **pages = vma->vm_private_data;
int numpgs = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
if (!xen_feature(XENFEAT_auto_translated_physmap || !numpgs || !pages))
return;
xen_unmap_domain_mfn_range(vma, numpgs, pages);
free_xenballooned_pages(numpgs, pages);
kfree(pages);
}
static int privcmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
printk(KERN_DEBUG "privcmd_fault: vma=%p %lx-%lx, pgoff=%lx, uv=%p\n",
@ -452,6 +517,7 @@ static int privcmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}
static struct vm_operations_struct privcmd_vm_ops = {
.close = privcmd_close,
.fault = privcmd_fault
};
@ -469,7 +535,7 @@ static int privcmd_mmap(struct file *file, struct vm_area_struct *vma)
static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma)
{
return (xchg(&vma->vm_private_data, (void *)1) == NULL);
return !cmpxchg(&vma->vm_private_data, NULL, PRIV_VMA_LOCKED);
}
const struct file_operations xen_privcmd_fops = {

182
drivers/xen/xen-acpi-pad.c Normal file
View File

@ -0,0 +1,182 @@
/*
* xen-acpi-pad.c - Xen pad interface
*
* Copyright (c) 2012, Intel Corporation.
* Author: Liu, Jinsong <jinsong.liu@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <asm/xen/hypercall.h>
#include <xen/interface/version.h>
#include <xen/xen-ops.h>
#define ACPI_PROCESSOR_AGGREGATOR_CLASS "acpi_pad"
#define ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME "Processor Aggregator"
#define ACPI_PROCESSOR_AGGREGATOR_NOTIFY 0x80
static DEFINE_MUTEX(xen_cpu_lock);
static int xen_acpi_pad_idle_cpus(unsigned int idle_nums)
{
struct xen_platform_op op;
op.cmd = XENPF_core_parking;
op.u.core_parking.type = XEN_CORE_PARKING_SET;
op.u.core_parking.idle_nums = idle_nums;
return HYPERVISOR_dom0_op(&op);
}
static int xen_acpi_pad_idle_cpus_num(void)
{
struct xen_platform_op op;
op.cmd = XENPF_core_parking;
op.u.core_parking.type = XEN_CORE_PARKING_GET;
return HYPERVISOR_dom0_op(&op)
?: op.u.core_parking.idle_nums;
}
/*
* Query firmware how many CPUs should be idle
* return -1 on failure
*/
static int acpi_pad_pur(acpi_handle handle)
{
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *package;
int num = -1;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_PUR", NULL, &buffer)))
return num;
if (!buffer.length || !buffer.pointer)
return num;
package = buffer.pointer;
if (package->type == ACPI_TYPE_PACKAGE &&
package->package.count == 2 &&
package->package.elements[0].integer.value == 1) /* rev 1 */
num = package->package.elements[1].integer.value;
kfree(buffer.pointer);
return num;
}
/* Notify firmware how many CPUs are idle */
static void acpi_pad_ost(acpi_handle handle, int stat,
uint32_t idle_nums)
{
union acpi_object params[3] = {
{.type = ACPI_TYPE_INTEGER,},
{.type = ACPI_TYPE_INTEGER,},
{.type = ACPI_TYPE_BUFFER,},
};
struct acpi_object_list arg_list = {3, params};
params[0].integer.value = ACPI_PROCESSOR_AGGREGATOR_NOTIFY;
params[1].integer.value = stat;
params[2].buffer.length = 4;
params[2].buffer.pointer = (void *)&idle_nums;
acpi_evaluate_object(handle, "_OST", &arg_list, NULL);
}
static void acpi_pad_handle_notify(acpi_handle handle)
{
int idle_nums;
mutex_lock(&xen_cpu_lock);
idle_nums = acpi_pad_pur(handle);
if (idle_nums < 0) {
mutex_unlock(&xen_cpu_lock);
return;
}
idle_nums = xen_acpi_pad_idle_cpus(idle_nums)
?: xen_acpi_pad_idle_cpus_num();
if (idle_nums >= 0)
acpi_pad_ost(handle, 0, idle_nums);
mutex_unlock(&xen_cpu_lock);
}
static void acpi_pad_notify(acpi_handle handle, u32 event,
void *data)
{
switch (event) {
case ACPI_PROCESSOR_AGGREGATOR_NOTIFY:
acpi_pad_handle_notify(handle);
break;
default:
pr_warn("Unsupported event [0x%x]\n", event);
break;
}
}
static int acpi_pad_add(struct acpi_device *device)
{
acpi_status status;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_AGGREGATOR_CLASS);
status = acpi_install_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY, acpi_pad_notify, device);
if (ACPI_FAILURE(status))
return -ENODEV;
return 0;
}
static int acpi_pad_remove(struct acpi_device *device,
int type)
{
mutex_lock(&xen_cpu_lock);
xen_acpi_pad_idle_cpus(0);
mutex_unlock(&xen_cpu_lock);
acpi_remove_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY, acpi_pad_notify);
return 0;
}
static const struct acpi_device_id pad_device_ids[] = {
{"ACPI000C", 0},
{"", 0},
};
static struct acpi_driver acpi_pad_driver = {
.name = "processor_aggregator",
.class = ACPI_PROCESSOR_AGGREGATOR_CLASS,
.ids = pad_device_ids,
.ops = {
.add = acpi_pad_add,
.remove = acpi_pad_remove,
},
};
static int __init xen_acpi_pad_init(void)
{
/* Only DOM0 is responsible for Xen acpi pad */
if (!xen_initial_domain())
return -ENODEV;
/* Only Xen4.2 or later support Xen acpi pad */
if (!xen_running_on_version_or_later(4, 2))
return -ENODEV;
return acpi_bus_register_driver(&acpi_pad_driver);
}
subsys_initcall(xen_acpi_pad_init);

118
drivers/xen/xen-pciback/pci_stub.c
View File

@ -142,7 +142,8 @@ static struct pcistub_device *pcistub_device_find(int domain, int bus,
if (psdev->dev != NULL
&& domain == pci_domain_nr(psdev->dev->bus)
&& bus == psdev->dev->bus->number
&& PCI_DEVFN(slot, func) == psdev->dev->devfn) {
&& slot == PCI_SLOT(psdev->dev->devfn)
&& func == PCI_FUNC(psdev->dev->devfn)) {
pcistub_device_get(psdev);
goto out;
}
@ -191,7 +192,8 @@ struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev,
if (psdev->dev != NULL
&& domain == pci_domain_nr(psdev->dev->bus)
&& bus == psdev->dev->bus->number
&& PCI_DEVFN(slot, func) == psdev->dev->devfn) {
&& slot == PCI_SLOT(psdev->dev->devfn)
&& func == PCI_FUNC(psdev->dev->devfn)) {
found_dev = pcistub_device_get_pci_dev(pdev, psdev);
break;
}
@ -897,42 +899,35 @@ static struct pci_driver xen_pcibk_pci_driver = {
static inline int str_to_slot(const char *buf, int *domain, int *bus,
int *slot, int *func)
{
int err;
char wc = '*';
int parsed = 0;
err = sscanf(buf, " %x:%x:%x.%x", domain, bus, slot, func);
switch (err) {
switch (sscanf(buf, " %x:%x:%x.%x %n", domain, bus, slot, func,
&parsed)) {
case 3:
*func = -1;
err = sscanf(buf, " %x:%x:%x.%c", domain, bus, slot, &wc);
sscanf(buf, " %x:%x:%x.* %n", domain, bus, slot, &parsed);
break;
case 2:
*slot = *func = -1;
err = sscanf(buf, " %x:%x:*.%c", domain, bus, &wc);
if (err >= 2)
++err;
sscanf(buf, " %x:%x:*.* %n", domain, bus, &parsed);
break;
}
if (err == 4 && wc == '*')
if (parsed && !buf[parsed])
return 0;
else if (err < 0)
return -EINVAL;
/* try again without domain */
*domain = 0;
wc = '*';
err = sscanf(buf, " %x:%x.%x", bus, slot, func);
switch (err) {
switch (sscanf(buf, " %x:%x.%x %n", bus, slot, func, &parsed)) {
case 2:
*func = -1;
err = sscanf(buf, " %x:%x.%c", bus, slot, &wc);
sscanf(buf, " %x:%x.* %n", bus, slot, &parsed);
break;
case 1:
*slot = *func = -1;
err = sscanf(buf, " %x:*.%c", bus, &wc) + 1;
sscanf(buf, " %x:*.* %n", bus, &parsed);
break;
}
if (err == 3 && wc == '*')
if (parsed && !buf[parsed])
return 0;
return -EINVAL;
@ -941,13 +936,20 @@ static inline int str_to_slot(const char *buf, int *domain, int *bus,
static inline int str_to_quirk(const char *buf, int *domain, int *bus, int
*slot, int *func, int *reg, int *size, int *mask)
{
int err;
int parsed = 0;
err =
sscanf(buf, " %04x:%02x:%02x.%d-%08x:%1x:%08x", domain, bus, slot,
func, reg, size, mask);
if (err == 7)
sscanf(buf, " %x:%x:%x.%x-%x:%x:%x %n", domain, bus, slot, func,
reg, size, mask, &parsed);
if (parsed && !buf[parsed])
return 0;
/* try again without domain */
*domain = 0;
sscanf(buf, " %x:%x.%x-%x:%x:%x %n", bus, slot, func, reg, size,
mask, &parsed);
if (parsed && !buf[parsed])
return 0;
return -EINVAL;
}
@ -955,7 +957,7 @@ static int pcistub_device_id_add(int domain, int bus, int slot, int func)
{
struct pcistub_device_id *pci_dev_id;
unsigned long flags;
int rc = 0;
int rc = 0, devfn = PCI_DEVFN(slot, func);
if (slot < 0) {
for (slot = 0; !rc && slot < 32; ++slot)
@ -969,13 +971,24 @@ static int pcistub_device_id_add(int domain, int bus, int slot, int func)
return rc;
}
if ((
#if !defined(MODULE) /* pci_domains_supported is not being exported */ \
|| !defined(CONFIG_PCI_DOMAINS)
!pci_domains_supported ? domain :
#endif
domain < 0 || domain > 0xffff)
|| bus < 0 || bus > 0xff
|| PCI_SLOT(devfn) != slot
|| PCI_FUNC(devfn) != func)
return -EINVAL;
pci_dev_id = kmalloc(sizeof(*pci_dev_id), GFP_KERNEL);
if (!pci_dev_id)
return -ENOMEM;
pci_dev_id->domain = domain;
pci_dev_id->bus = bus;
pci_dev_id->devfn = PCI_DEVFN(slot, func);
pci_dev_id->devfn = devfn;
pr_debug(DRV_NAME ": wants to seize %04x:%02x:%02x.%d\n",
domain, bus, slot, func);
@ -1016,14 +1029,18 @@ static int pcistub_device_id_remove(int domain, int bus, int slot, int func)
return err;
}
static int pcistub_reg_add(int domain, int bus, int slot, int func, int reg,
int size, int mask)
static int pcistub_reg_add(int domain, int bus, int slot, int func,
unsigned int reg, unsigned int size,
unsigned int mask)
{
int err = 0;
struct pcistub_device *psdev;
struct pci_dev *dev;
struct config_field *field;
if (reg > 0xfff || (size < 4 && (mask >> (size * 8))))
return -EINVAL;
psdev = pcistub_device_find(domain, bus, slot, func);
if (!psdev) {
err = -ENODEV;
@ -1254,13 +1271,11 @@ static ssize_t permissive_add(struct device_driver *drv, const char *buf,
int err;
struct pcistub_device *psdev;
struct xen_pcibk_dev_data *dev_data;
err = str_to_slot(buf, &domain, &bus, &slot, &func);
if (err)
goto out;
if (slot < 0 || func < 0) {
err = -EINVAL;
goto out;
}
psdev = pcistub_device_find(domain, bus, slot, func);
if (!psdev) {
err = -ENODEV;
@ -1339,8 +1354,6 @@ static int __init pcistub_init(void)
if (pci_devs_to_hide && *pci_devs_to_hide) {
do {
char wc = '*';
parsed = 0;
err = sscanf(pci_devs_to_hide + pos,
@ -1349,51 +1362,48 @@ static int __init pcistub_init(void)
switch (err) {
case 3:
func = -1;
err = sscanf(pci_devs_to_hide + pos,
" (%x:%x:%x.%c) %n",
&domain, &bus, &slot, &wc,
&parsed);
sscanf(pci_devs_to_hide + pos,
" (%x:%x:%x.*) %n",
&domain, &bus, &slot, &parsed);
break;
case 2:
slot = func = -1;
err = sscanf(pci_devs_to_hide + pos,
" (%x:%x:*.%c) %n",
&domain, &bus, &wc, &parsed) + 1;
sscanf(pci_devs_to_hide + pos,
" (%x:%x:*.*) %n",
&domain, &bus, &parsed);
break;
}
if (err != 4 || wc != '*') {
if (!parsed) {
domain = 0;
wc = '*';
err = sscanf(pci_devs_to_hide + pos,
" (%x:%x.%x) %n",
&bus, &slot, &func, &parsed);
switch (err) {
case 2:
func = -1;
err = sscanf(pci_devs_to_hide + pos,
" (%x:%x.%c) %n",
&bus, &slot, &wc,
&parsed);
sscanf(pci_devs_to_hide + pos,
" (%x:%x.*) %n",
&bus, &slot, &parsed);
break;
case 1:
slot = func = -1;
err = sscanf(pci_devs_to_hide + pos,
" (%x:*.%c) %n",
&bus, &wc, &parsed) + 1;
sscanf(pci_devs_to_hide + pos,
" (%x:*.*) %n",
&bus, &parsed);
break;
}
if (err != 3 || wc != '*')
goto parse_error;
}
if (parsed <= 0)
goto parse_error;
err = pcistub_device_id_add(domain, bus, slot, func);
if (err)
goto out;
/* if parsed<=0, we've reached the end of the string */
pos += parsed;
} while (parsed > 0 && pci_devs_to_hide[pos]);
} while (pci_devs_to_hide[pos]);
}
/* If we're the first PCI Device Driver to register, we're the

1
drivers/xen/xenbus/xenbus_xs.c
View File

@ -48,7 +48,6 @@
#include <xen/xenbus.h>
#include <xen/xen.h>
#include "xenbus_comms.h"
#include <asm/xen/hypervisor.h>
struct xs_stored_msg {
struct list_head list;

44
include/xen/interface/memory.h
View File

@ -153,6 +153,14 @@ struct xen_machphys_mapping {
};
DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t);
#define XENMAPSPACE_shared_info 0 /* shared info page */
#define XENMAPSPACE_grant_table 1 /* grant table page */
#define XENMAPSPACE_gmfn 2 /* GMFN */
#define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */
#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
* XENMEM_add_to_physmap_range only.
*/
/*
* Sets the GPFN at which a particular page appears in the specified guest's
* pseudophysical address space.
@ -167,8 +175,6 @@ struct xen_add_to_physmap {
uint16_t size;
/* Source mapping space. */
#define XENMAPSPACE_shared_info 0 /* shared info page */
#define XENMAPSPACE_grant_table 1 /* grant table page */
unsigned int space;
/* Index into source mapping space. */
@ -182,6 +188,24 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
/*** REMOVED ***/
/*#define XENMEM_translate_gpfn_list 8*/
#define XENMEM_add_to_physmap_range 23
struct xen_add_to_physmap_range {
/* Which domain to change the mapping for. */
domid_t domid;
uint16_t space; /* => enum phys_map_space */
/* Number of pages to go through */
uint16_t size;
domid_t foreign_domid; /* IFF gmfn_foreign */
/* Indexes into space being mapped. */
GUEST_HANDLE(xen_ulong_t) idxs;
/* GPFN in domid where the source mapping page should appear. */
GUEST_HANDLE(xen_pfn_t) gpfns;
};
DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap_range);
/*
* Returns the pseudo-physical memory map as it was when the domain
* was started (specified by XENMEM_set_memory_map).
@ -217,4 +241,20 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map);
* during a driver critical region.
*/
extern spinlock_t xen_reservation_lock;
/*
* Unmaps the page appearing at a particular GPFN from the specified guest's
* pseudophysical address space.
* arg == addr of xen_remove_from_physmap_t.
*/
#define XENMEM_remove_from_physmap 15
struct xen_remove_from_physmap {
/* Which domain to change the mapping for. */
domid_t domid;
/* GPFN of the current mapping of the page. */
xen_pfn_t gpfn;
};
DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap);
#endif /* __XEN_PUBLIC_MEMORY_H__ */

17
include/xen/interface/platform.h
View File

@ -324,6 +324,22 @@ struct xenpf_cpu_ol {
};
DEFINE_GUEST_HANDLE_STRUCT(xenpf_cpu_ol);
/*
* CMD 58 and 59 are reserved for cpu hotadd and memory hotadd,
* which are already occupied at Xen hypervisor side.
*/
#define XENPF_core_parking 60
struct xenpf_core_parking {
/* IN variables */
#define XEN_CORE_PARKING_SET 1
#define XEN_CORE_PARKING_GET 2
uint32_t type;
/* IN variables: set cpu nums expected to be idled */
/* OUT variables: get cpu nums actually be idled */
uint32_t idle_nums;
};
DEFINE_GUEST_HANDLE_STRUCT(xenpf_core_parking);
struct xen_platform_op {
uint32_t cmd;
uint32_t interface_version; /* XENPF_INTERFACE_VERSION */
@ -341,6 +357,7 @@ struct xen_platform_op {
struct xenpf_set_processor_pminfo set_pminfo;
struct xenpf_pcpuinfo pcpu_info;
struct xenpf_cpu_ol cpu_ol;
struct xenpf_core_parking core_parking;
uint8_t pad[128];
} u;
};

9
include/xen/xen-ops.h
View File

@ -2,6 +2,7 @@
#define INCLUDE_XEN_OPS_H
#include <linux/percpu.h>
#include <asm/xen/interface.h>
DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
@ -26,7 +27,11 @@ void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
struct vm_area_struct;
int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
unsigned long addr,
unsigned long mfn, int nr,
pgprot_t prot, unsigned domid);
xen_pfn_t mfn, int nr,
pgprot_t prot, unsigned domid,
struct page **pages);
int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
int numpgs, struct page **pages);
bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
#endif /* INCLUDE_XEN_OPS_H */