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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Embedded-pv-devel] [PATCH RFC 16/18] xen: Add dom0_mem_high option & over 4GB memory allocation for Dom0
From: Iurii Mykhalskyi <iurii.mykhalskyi@xxxxxxxxxxxxxxx>
Add support of custom allocation of over 4GB memory for Dom0. Requested
memory size might be specified by passing dom0_mem_high option in Xen
cmdline
Signed-off-by: Iurii Mykhalskyi <iurii.mykhalskyi@xxxxxxxxxxxxxxx>
---
xen/Rules.mk | 1 +
xen/arch/arm/domain_build.c | 189 +++++++++++++++++++++++++++++++++++++++++++-
xen/arch/arm/kernel.h | 9 +++
3 files changed, 198 insertions(+), 1 deletion(-)
diff --git a/xen/Rules.mk b/xen/Rules.mk
index fbd34a5..51f7124 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -65,6 +65,7 @@ CFLAGS-$(HAS_IOPORTS) += -DHAS_IOPORTS
CFLAGS-$(HAS_PDX) += -DHAS_PDX
CFLAGS-$(frame_pointer) += -fno-omit-frame-pointer -DCONFIG_FRAME_POINTER
CFLAGS-$(ARM32_RELOCATE_OVER_4GB) += -DARM32_RELOCATE_OVER_4GB
+CFLAGS-$(ARM32_SEPAR_MEM_SPLIT) += -DARM32_SEPAR_MEM_SPLIT
ifneq ($(max_phys_cpus),)
CFLAGS-y += -DMAX_PHYS_CPUS=$(max_phys_cpus)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index f06792e..a63958b 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -35,6 +35,11 @@ int dom0_11_mapping = 1;
#define DOM0_MEM_DEFAULT 0x8000000 /* 128 MiB */
static u64 __initdata dom0_mem = DOM0_MEM_DEFAULT;
+#ifdef ARM32_SEPAR_MEM_SPLIT
+#define DOM0_MEM_HIGH_DEFAULT 0x0 /* 0 MiB */
+static u64 __initdata dom0_mem_high = DOM0_MEM_HIGH_DEFAULT;
+#endif
+
static void __init parse_dom0_mem(const char *s)
{
dom0_mem = parse_size_and_unit(s, &s);
@@ -43,6 +48,14 @@ static void __init parse_dom0_mem(const char *s)
}
custom_param("dom0_mem", parse_dom0_mem);
+#ifdef ARM32_SEPAR_MEM_SPLIT
+static void __init parse_dom0_mem_high(const char *s)
+{
+ dom0_mem_high = parse_size_and_unit(s, &s);
+}
+custom_param("dom0_mem_high", parse_dom0_mem_high);
+#endif
+
//#define DEBUG_DT
#ifdef DEBUG_DT
@@ -130,7 +143,11 @@ static bool_t insert_11_bank(struct domain *d,
if ( res )
panic("Failed map pages to DOM0: %d", res);
+#ifndef ARM32_SEPAR_MEM_SPLIT
kinfo->unassigned_mem -= size;
+#else
+ kinfo->unassigned_mem.low -= size;
+#endif
if ( kinfo->mem.nr_banks == 0 )
{
@@ -192,6 +209,82 @@ fail:
return false;
}
+#ifdef ARM32_SEPAR_MEM_SPLIT
+static void allocate_dom0_high_memory(struct domain *d, struct kernel_info
*kinfo)
+{
+ int i, res, st_banks = kinfo->mem.nr_banks;
+ struct page_info *pg = NULL;
+ int bits;
+ unsigned int order = get_11_allocation_size(dom0_mem_high);
+ const unsigned int min_order = get_order_from_bytes(MB(4));
+ paddr_t spfn;
+ paddr_t start, size;
+ struct membank *bank = NULL;
+
+ if (dom0_mem_high == 0)
+ return;
+
+ printk("Allocating %ldMB of high memory region for dom0\n",
+ (unsigned long)(dom0_mem_high >> 20));
+
+ while ( kinfo->unassigned_mem.high && kinfo->mem.nr_banks < NR_MEM_BANKS )
+ {
+ for (bits = PADDR_BITS ; bits >= min_order; bits-- )
+ {
+ pg = alloc_domheap_pages(d, order, MEMF_bits(bits));
+ if ( pg != NULL )
+ break;
+ }
+
+ if ( !pg )
+ {
+ order --;
+ if ( order >= min_order )
+ continue;
+
+ /* No more we can do */
+ break;
+ }
+
+ spfn = page_to_mfn(pg);
+ start = pfn_to_paddr(spfn);
+ size = pfn_to_paddr((1 << order));
+
+ res = guest_physmap_add_page(d, spfn, spfn, order);
+ if ( res )
+ panic("Failed map pages to DOM0: %d", res);
+
+ kinfo->unassigned_mem.high -= size;
+
+ bank = &kinfo->mem.bank[kinfo->mem.nr_banks];
+
+ bank->start = start;
+ bank->size = size;
+ kinfo->mem.nr_banks++;
+
+ /*
+ * Success, next time around try again to get the largest order
+ * allocation possible.
+ */
+
+ order = get_11_allocation_size(kinfo->unassigned_mem.high);
+ }
+
+ if(kinfo->unassigned_mem.high)
+ panic("Unable to allocate high memory bank");
+
+ for( i = st_banks; i < kinfo->mem.nr_banks; i++ )
+ {
+ printk("BANK[%d] %#"PRIpaddr"-%#"PRIpaddr" (%ldMB)\n",
+ i,
+ kinfo->mem.bank[i].start,
+ kinfo->mem.bank[i].start + kinfo->mem.bank[i].size,
+ /* Don't want format this as PRIpaddr (16 digit hex) */
+ (unsigned long)(kinfo->mem.bank[i].size >> 20));
+ }
+}
+#endif
+
/*
* This is all pretty horrible.
*
@@ -250,9 +343,13 @@ static void allocate_memory_11(struct domain *d, struct
kernel_info *kinfo)
get_11_allocation_size(min_t(paddr_t, dom0_mem, MB(128)));
const unsigned int min_order = get_order_from_bytes(MB(4));
struct page_info *pg;
- unsigned int order = get_11_allocation_size(kinfo->unassigned_mem);
u64 rambase_pfn = opt_dom0_rambase_pfn;
+#ifndef ARM32_SEPAR_MEM_SPLIT
+ unsigned int order = get_11_allocation_size(kinfo->unassigned_mem);
paddr_t mem_size = kinfo->unassigned_mem;
+#else
+ unsigned int order = get_11_allocation_size(kinfo->unassigned_mem.low);
+#endif
int i;
bool_t lowmem = is_32bit_domain(d);
@@ -260,7 +357,11 @@ static void allocate_memory_11(struct domain *d, struct
kernel_info *kinfo)
printk("Allocating 1:1 mappings totalling %ldMB for dom0:\n",
/* Don't want format this as PRIpaddr (16 digit hex) */
+#ifndef ARM32_SEPAR_MEM_SPLIT
(unsigned long)(kinfo->unassigned_mem >> 20));
+#else
+ (unsigned long)(kinfo->unassigned_mem.low >> 20));
+#endif
kinfo->mem.nr_banks = 0;
@@ -288,6 +389,7 @@ static void allocate_memory_11(struct domain *d, struct
kernel_info *kinfo)
/* Now allocate more memory and fill in additional banks */
+#ifndef ARM32_SEPAR_MEM_SPLIT
order = get_11_allocation_size(kinfo->unassigned_mem);
if ( opt_dom0_rambase_pfn )
rambase_pfn += (mem_size - kinfo->unassigned_mem) >> PAGE_SHIFT;
@@ -353,7 +455,62 @@ static void allocate_memory_11(struct domain *d, struct
kernel_info *kinfo)
/* Don't want format this as PRIpaddr (16 digit hex) */
" %ldMB unallocated\n",
(unsigned long)kinfo->unassigned_mem >> 20);
+#else
+ order = get_11_allocation_size(kinfo->unassigned_mem.low);
+ while ( kinfo->unassigned_mem.low && kinfo->mem.nr_banks < NR_MEM_BANKS )
+ {
+ pg = alloc_domheap_pages(d, order, lowmem ? MEMF_bits(32) : 0);
+ if ( !pg )
+ {
+ order --;
+
+ if ( lowmem && order < min_low_order)
+ {
+ D11PRINT("Failed at min_low_order, allow high allocations\n");
+ order = get_11_allocation_size(kinfo->unassigned_mem.low);
+ lowmem = false;
+ continue;
+ }
+ if ( order >= min_order )
+ continue;
+
+ /* No more we can do */
+ break;
+ }
+
+ if ( !insert_11_bank(d, kinfo, pg, order) )
+ {
+ if ( kinfo->mem.nr_banks == NR_MEM_BANKS )
+ /* Nothing more we can do. */
+ break;
+
+ if ( lowmem )
+ {
+ D11PRINT("Allocation below bank 0, allow high allocations\n");
+ order = get_11_allocation_size(kinfo->unassigned_mem.low);
+ lowmem = false;
+ continue;
+ }
+ else
+ {
+ D11PRINT("Allocation below bank 0\n");
+ break;
+ }
+ }
+
+ /*
+ * Success, next time around try again to get the largest order
+ * allocation possible.
+ */
+ order = get_11_allocation_size(kinfo->unassigned_mem.low);
+ }
+ if ( kinfo->unassigned_mem.low )
+ printk("WARNING: Failed to allocate requested dom0 memory."
+ /* Don't want format this as PRIpaddr (16 digit hex) */
+ " %ldMB unallocated\n",
+ (unsigned long)kinfo->unassigned_mem.low >> 20);
+#endif
for( i = 0; i < kinfo->mem.nr_banks; i++ )
{
printk("BANK[%d] %#"PRIpaddr"-%#"PRIpaddr" (%ldMB)\n",
@@ -374,7 +531,19 @@ static void allocate_memory(struct domain *d, struct
kernel_info *kinfo)
unsigned int bank = 0;
if ( dom0_11_mapping )
+#ifndef ARM32_SEPAR_MEM_SPLIT
return allocate_memory_11(d, kinfo);
+#else
+ {
+ allocate_memory_11(d, kinfo);
+ return allocate_dom0_high_memory(d, kinfo);
+ }
+#endif
+
+#ifdef ARM32_SEPAR_MEM_SPLIT
+ if (dom0_mem_high != 0)
+ printk("***WARNING*** We don't implement dom0_mem_high option for non
1:1 mapped domains!\n");
+#endif
while ( (memory = dt_find_node_by_type(memory, "memory")) )
{
@@ -389,7 +558,11 @@ static void allocate_memory(struct domain *d, struct
kernel_info *kinfo)
panic("Memory node has no reg property");
for ( l = 0;
+#ifndef ARM32_SEPAR_MEM_SPLIT
kinfo->unassigned_mem > 0 && l + reg_size <= reg_len
+#else
+ kinfo->unassigned_mem.low > 0 && l + reg_size <= reg_len
+#endif
&& kinfo->mem.nr_banks < NR_MEM_BANKS;
l += reg_size )
{
@@ -399,8 +572,13 @@ static void allocate_memory(struct domain *d, struct
kernel_info *kinfo)
panic("Unable to retrieve the bank %u for %s",
bank, dt_node_full_name(memory));
+#ifndef ARM32_SEPAR_MEM_SPLIT
if ( size > kinfo->unassigned_mem )
size = kinfo->unassigned_mem;
+#else
+ if ( size > kinfo->unassigned_mem.low )
+ size = kinfo->unassigned_mem.low;
+#endif
printk("Populate P2M %#"PRIx64"->%#"PRIx64"\n",
start, start + size);
@@ -410,7 +588,11 @@ static void allocate_memory(struct domain *d, struct
kernel_info *kinfo)
kinfo->mem.bank[kinfo->mem.nr_banks].size = size;
kinfo->mem.nr_banks++;
+#ifndef ARM32_SEPAR_MEM_SPLIT
kinfo->unassigned_mem -= size;
+#else
+ kinfo->unassigned_mem.low -= size;
+#endif
}
}
}
@@ -1521,7 +1703,12 @@ int construct_dom0(struct domain *d)
d->max_pages = ~0U;
+#ifndef ARM32_SEPAR_MEM_SPLIT
kinfo.unassigned_mem = dom0_mem;
+#else
+ kinfo.unassigned_mem.low = dom0_mem;
+ kinfo.unassigned_mem.high = dom0_mem_high;
+#endif
rc = kernel_probe(&kinfo);
if ( rc < 0 )
diff --git a/xen/arch/arm/kernel.h b/xen/arch/arm/kernel.h
index c1b07d4..83fa0ed 100644
--- a/xen/arch/arm/kernel.h
+++ b/xen/arch/arm/kernel.h
@@ -16,7 +16,16 @@ struct kernel_info {
#endif
void *fdt; /* flat device tree */
+
+#ifndef ARM32_SEPAR_MEM_SPLIT
paddr_t unassigned_mem; /* RAM not (yet) assigned to a bank */
+#else
+ struct {
+ paddr_t low; /* Low RAM not (yet) assigned to a bank */
+ paddr_t high; /* High RAM not (yet) assigned to a bank */
+ } unassigned_mem;
+#endif
+
struct meminfo mem;
/* kernel entry point */
--
2.8.2
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