aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-12 00:08:14 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-12 00:08:14 (GMT)
commitd14d7f14f177834788a276fc7b1317b539cedca2 (patch)
treef646397d522ae94ff1457d3d1bde6ea834afe8d5 /arch
parent6cdfa54cd22984ae785b0d496b53405d6da9ad1d (diff)
parent01bd2ac2f55a1916d81dace12fa8d7ae1c79b5ea (diff)
Merge tag 'for-linus-5.1a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross: "xen fixes and features: - remove fallback code for very old Xen hypervisors - three patches for fixing Xen dom0 boot regressions - an old patch for Xen PCI passthrough which was never applied for unknown reasons - some more minor fixes and cleanup patches" * tag 'for-linus-5.1a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: fix dom0 boot on huge systems xen, cpu_hotplug: Prevent an out of bounds access xen: remove pre-xen3 fallback handlers xen/ACPI: Switch to bitmap_zalloc() x86/xen: dont add memory above max allowed allocation x86: respect memory size limiting via mem= parameter xen/gntdev: Check and release imported dma-bufs on close xen/gntdev: Do not destroy context while dma-bufs are in use xen/pciback: Don't disable PCI_COMMAND on PCI device reset. xen-scsiback: mark expected switch fall-through xen: mark expected switch fall-through
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/xen/hypercall.h13
-rw-r--r--arch/x86/kernel/e820.c5
-rw-r--r--arch/x86/xen/mmu_pv.c13
-rw-r--r--arch/x86/xen/setup.c13
4 files changed, 26 insertions, 18 deletions
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index ef05bea..de6f0d5 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -332,15 +332,11 @@ HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
return _hypercall4(int, update_va_mapping, va,
new_val.pte, new_val.pte >> 32, flags);
}
-extern int __must_check xen_event_channel_op_compat(int, void *);
static inline int
HYPERVISOR_event_channel_op(int cmd, void *arg)
{
- int rc = _hypercall2(int, event_channel_op, cmd, arg);
- if (unlikely(rc == -ENOSYS))
- rc = xen_event_channel_op_compat(cmd, arg);
- return rc;
+ return _hypercall2(int, event_channel_op, cmd, arg);
}
static inline int
@@ -355,15 +351,10 @@ HYPERVISOR_console_io(int cmd, int count, char *str)
return _hypercall3(int, console_io, cmd, count, str);
}
-extern int __must_check xen_physdev_op_compat(int, void *);
-
static inline int
HYPERVISOR_physdev_op(int cmd, void *arg)
{
- int rc = _hypercall2(int, physdev_op, cmd, arg);
- if (unlikely(rc == -ENOSYS))
- rc = xen_physdev_op_compat(cmd, arg);
- return rc;
+ return _hypercall2(int, physdev_op, cmd, arg);
}
static inline int
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index a687d10..666e4af 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -14,6 +14,7 @@
#include <linux/acpi.h>
#include <linux/firmware-map.h>
#include <linux/sort.h>
+#include <linux/memory_hotplug.h>
#include <asm/e820/api.h>
#include <asm/setup.h>
@@ -878,6 +879,10 @@ static int __init parse_memopt(char *p)
e820__range_remove(mem_size, ULLONG_MAX - mem_size, E820_TYPE_RAM, 1);
+#ifdef CONFIG_MEMORY_HOTPLUG
+ max_mem_size = mem_size;
+#endif
+
return 0;
}
early_param("mem", parse_memopt);
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 856a858..a21e173 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -2114,10 +2114,10 @@ void __init xen_relocate_p2m(void)
pt = early_memremap(pt_phys, PAGE_SIZE);
clear_page(pt);
for (idx_pte = 0;
- idx_pte < min(n_pte, PTRS_PER_PTE);
- idx_pte++) {
- set_pte(pt + idx_pte,
- pfn_pte(p2m_pfn, PAGE_KERNEL));
+ idx_pte < min(n_pte, PTRS_PER_PTE);
+ idx_pte++) {
+ pt[idx_pte] = pfn_pte(p2m_pfn,
+ PAGE_KERNEL);
p2m_pfn++;
}
n_pte -= PTRS_PER_PTE;
@@ -2125,8 +2125,7 @@ void __init xen_relocate_p2m(void)
make_lowmem_page_readonly(__va(pt_phys));
pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE,
PFN_DOWN(pt_phys));
- set_pmd(pmd + idx_pt,
- __pmd(_PAGE_TABLE | pt_phys));
+ pmd[idx_pt] = __pmd(_PAGE_TABLE | pt_phys);
pt_phys += PAGE_SIZE;
}
n_pt -= PTRS_PER_PMD;
@@ -2134,7 +2133,7 @@ void __init xen_relocate_p2m(void)
make_lowmem_page_readonly(__va(pmd_phys));
pin_pagetable_pfn(MMUEXT_PIN_L2_TABLE,
PFN_DOWN(pmd_phys));
- set_pud(pud + idx_pmd, __pud(_PAGE_TABLE | pmd_phys));
+ pud[idx_pmd] = __pud(_PAGE_TABLE | pmd_phys);
pmd_phys += PAGE_SIZE;
}
n_pmd -= PTRS_PER_PUD;
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index d5f303c..548d1e0 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -12,6 +12,7 @@
#include <linux/memblock.h>
#include <linux/cpuidle.h>
#include <linux/cpufreq.h>
+#include <linux/memory_hotplug.h>
#include <asm/elf.h>
#include <asm/vdso.h>
@@ -589,6 +590,14 @@ static void __init xen_align_and_add_e820_region(phys_addr_t start,
if (type == E820_TYPE_RAM) {
start = PAGE_ALIGN(start);
end &= ~((phys_addr_t)PAGE_SIZE - 1);
+#ifdef CONFIG_MEMORY_HOTPLUG
+ /*
+ * Don't allow adding memory not in E820 map while booting the
+ * system. Once the balloon driver is up it will remove that
+ * restriction again.
+ */
+ max_mem_size = end;
+#endif
}
e820__range_add(start, end - start, type);
@@ -748,6 +757,10 @@ char * __init xen_memory_setup(void)
memmap.nr_entries = ARRAY_SIZE(xen_e820_table.entries);
set_xen_guest_handle(memmap.buffer, xen_e820_table.entries);
+#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
+ xen_saved_max_mem_size = max_mem_size;
+#endif
+
op = xen_initial_domain() ?
XENMEM_machine_memory_map :
XENMEM_memory_map;

Privacy Policy