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authorDavid Vrabel <david.vrabel@citrix.com>2014-06-02 18:58:01 +0200
committerDavid Vrabel <david.vrabel@citrix.com>2014-06-05 15:22:27 +0200
commitabacaadc4144a8849782cc0917a624a7114ffbb1 (patch)
treef9c47de717c40deb7b3ef1793b57b7e61ff5204b /arch
parentx86/xen: map foreign pfns for autotranslated guests (diff)
downloadlinux-abacaadc4144a8849782cc0917a624a7114ffbb1.tar.xz
linux-abacaadc4144a8849782cc0917a624a7114ffbb1.zip
x86/xen: fix memory setup for PVH dom0
Since af06d66ee32b (x86: fix setup of PVH Dom0 memory map) in Xen, PVH dom0 need only use the memory memory provided by Xen which has already setup all the correct holes. xen_memory_setup() then ends up being trivial for a PVH guest so introduce a new function (xen_auto_xlated_memory_setup()). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com> Tested-by: Roger Pau Monné <roger.pau@citrix.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/enlighten.c5
-rw-r--r--arch/x86/xen/setup.c29
-rw-r--r--arch/x86/xen/xen-ops.h1
3 files changed, 34 insertions, 1 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 662bdcbbbd18..3123d1f74415 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1537,7 +1537,10 @@ asmlinkage void __init xen_start_kernel(void)
if (!xen_pvh_domain())
pv_cpu_ops = xen_cpu_ops;
- x86_init.resources.memory_setup = xen_memory_setup;
+ if (xen_feature(XENFEAT_auto_translated_physmap))
+ x86_init.resources.memory_setup = xen_auto_xlated_memory_setup;
+ else
+ x86_init.resources.memory_setup = xen_memory_setup;
x86_init.oem.arch_setup = xen_arch_setup;
x86_init.oem.banner = xen_banner;
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 210426a26cc0..37cfbfacd59a 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -518,6 +518,35 @@ char * __init xen_memory_setup(void)
}
/*
+ * Machine specific memory setup for auto-translated guests.
+ */
+char * __init xen_auto_xlated_memory_setup(void)
+{
+ static struct e820entry map[E820MAX] __initdata;
+
+ struct xen_memory_map memmap;
+ int i;
+ int rc;
+
+ memmap.nr_entries = E820MAX;
+ set_xen_guest_handle(memmap.buffer, map);
+
+ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+ if (rc < 0)
+ panic("No memory map (%d)\n", rc);
+
+ sanitize_e820_map(map, ARRAY_SIZE(map), &memmap.nr_entries);
+
+ for (i = 0; i < memmap.nr_entries; i++)
+ e820_add_region(map[i].addr, map[i].size, map[i].type);
+
+ memblock_reserve(__pa(xen_start_info->mfn_list),
+ xen_start_info->pt_base - xen_start_info->mfn_list);
+
+ return "Xen";
+}
+
+/*
* Set the bit indicating "nosegneg" library variants should be used.
* We only need to bother in pure 32-bit mode; compat 32-bit processes
* can have un-truncated segments, so wrapping around is allowed.
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index c834d4b231f0..97d87659f779 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -36,6 +36,7 @@ void xen_mm_unpin_all(void);
void xen_set_pat(u64);
char * __init xen_memory_setup(void);
+char * xen_auto_xlated_memory_setup(void);
void __init xen_arch_setup(void);
void xen_enable_sysenter(void);
void xen_enable_syscall(void);