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-rw-r--r--arch/x86/xen/Kconfig3
-rw-r--r--arch/x86/xen/enlighten.c109
-rw-r--r--arch/x86/xen/mmu.c38
-rw-r--r--arch/x86/xen/smp.c2
-rw-r--r--arch/x86/xen/suspend.c2
-rw-r--r--arch/x86/xen/xen-ops.h2
6 files changed, 121 insertions, 35 deletions
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index fdce49c7aff6..131dacd2748a 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -6,8 +6,9 @@ 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_CMPXCHG && X86_TSC
+ depends on X86_TSC
help
This is the Linux Xen port. Enabling this will allow the
kernel to boot in a paravirtualized environment under the
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 586d83812b67..138e5667409a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -193,10 +193,11 @@ void xen_vcpu_restore(void)
{
int cpu;
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
bool other_cpu = (cpu != smp_processor_id());
+ bool is_up = HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL);
- if (other_cpu &&
+ if (other_cpu && is_up &&
HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL))
BUG();
@@ -205,7 +206,7 @@ void xen_vcpu_restore(void)
if (have_vcpu_info_placement)
xen_vcpu_setup(cpu);
- if (other_cpu &&
+ if (other_cpu && is_up &&
HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL))
BUG();
}
@@ -223,6 +224,21 @@ 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 +303,7 @@ 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 +324,13 @@ 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 +1517,72 @@ 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 +1633,22 @@ 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 6226c99729b9..01de35c77221 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1288,6 +1288,25 @@ unsigned long xen_read_cr2_direct(void)
return this_cpu_read(xen_vcpu_info.arch.cr2);
}
+void xen_flush_tlb_all(void)
+{
+ struct mmuext_op *op;
+ struct multicall_space mcs;
+
+ trace_xen_mmu_flush_tlb_all(0);
+
+ preempt_disable();
+
+ mcs = xen_mc_entry(sizeof(*op));
+
+ op = mcs.args;
+ op->cmd = MMUEXT_TLB_FLUSH_ALL;
+ MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
+
+ xen_mc_issue(PARAVIRT_LAZY_MMU);
+
+ preempt_enable();
+}
static void xen_flush_tlb(void)
{
struct mmuext_op *op;
@@ -2478,8 +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];
@@ -2518,8 +2539,19 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
err = 0;
out:
- flush_tlb_all();
+ xen_flush_tlb_all();
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/smp.c b/arch/x86/xen/smp.c
index 353c50f18702..4f7d2599b484 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -254,7 +254,7 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
}
xen_init_lock_cpu(0);
- smp_store_cpu_info(0);
+ smp_store_boot_cpu_info();
cpu_data(0).x86_max_cores = 1;
for_each_possible_cpu(i) {
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 04:16:30 +0300