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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 14:29:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 14:29:16 -0800
commit896ea17d3da5f44b2625c9cda9874d7dfe447393 (patch)
tree089f00dd300a49c81f042e9b52ef32cd1333bdbc /arch
parentc7708fac5a878d6e0f2de0aa19f9749cff4f707f (diff)
parent6a7ed405114b2a53ccd99631b0636aaeabf71b3e (diff)
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
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/xen/interface.h1
-rw-r--r--arch/arm/xen/enlighten.c123
-rw-r--r--arch/x86/include/asm/xen/interface.h1
-rw-r--r--arch/x86/xen/Kconfig1
-rw-r--r--arch/x86/xen/enlighten.c102
-rw-r--r--arch/x86/xen/mmu.c17
-rw-r--r--arch/x86/xen/suspend.c2
-rw-r--r--arch/x86/xen/xen-ops.h2
8 files changed, 199 insertions, 50 deletions
diff --git a/arch/arm/include/asm/xen/interface.h b/arch/arm/include/asm/xen/interface.h
index 5000397134b4..1151188bcd83 100644
--- a/arch/arm/include/asm/xen/interface.h
+++ b/arch/arm/include/asm/xen/interface.h
@@ -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
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index f57609275449..7a32976fa2a3 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -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);
diff --git a/arch/x86/include/asm/xen/interface.h b/arch/x86/include/asm/xen/interface.h
index 54d52ff1304a..fd9cb7695b5f 100644
--- a/arch/x86/include/asm/xen/interface.h
+++ b/arch/x86/include/asm/xen/interface.h
@@ -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
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 9a6775c9ddca..131dacd2748a 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -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
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 586d83812b67..3aeaa933b527 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -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)
+#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)
{
- int cpu;
struct xen_add_to_physmap xatp;
- static struct shared_info *shared_info_page = 0;
- 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];
+}
+
+/* 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);
}
-#ifdef CONFIG_XEN_PVHVM
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;
}
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index dcf5f2dd91ec..01de35c77221 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -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);
diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c
index 45329c8c226e..ae8a00c39de4 100644
--- a/arch/x86/xen/suspend.c
+++ b/arch/x86/xen/suspend.c
@@ -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)) {
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index a95b41744ad0..d2e73d19d366 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -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);