Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
At 08/02/2018 03:05 PM, Thomas Gleixner wrote: [...] Folks. Can you please both stop this annoying habit of keeping the full context of the mail and then sprinkling a random sentence into the middle? I see. won’t do this stupid thing again. Thanks, dou
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
At 08/02/2018 03:05 PM, Thomas Gleixner wrote: [...] Folks. Can you please both stop this annoying habit of keeping the full context of the mail and then sprinkling a random sentence into the middle? I see. won’t do this stupid thing again. Thanks, dou
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
On Thu, 2 Aug 2018, Chao Fan wrote: > On Thu, Aug 02, 2018 at 11:47:13AM +0800, Dou Liyang wrote: Removed 70 lines of complete useless information > >> + table = (struct acpi_subtable_header *) > >> + ((unsigned long)table_header + sizeof(struct acpi_table_srat)); > >> + > >> + table_size = sizeof(struct acpi_subtable_header); > > > >table_size isn't used, can be remove. > > > > Thank you very much, will update in next version. And yet another 40 lines. > Folks. Can you please both stop this annoying habit of keeping the full context of the mail and then sprinkling a random sentence into the middle? Thanks, tglx
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
On Thu, 2 Aug 2018, Chao Fan wrote: > On Thu, Aug 02, 2018 at 11:47:13AM +0800, Dou Liyang wrote: Removed 70 lines of complete useless information > >> + table = (struct acpi_subtable_header *) > >> + ((unsigned long)table_header + sizeof(struct acpi_table_srat)); > >> + > >> + table_size = sizeof(struct acpi_subtable_header); > > > >table_size isn't used, can be remove. > > > > Thank you very much, will update in next version. And yet another 40 lines. > Folks. Can you please both stop this annoying habit of keeping the full context of the mail and then sprinkling a random sentence into the middle? Thanks, tglx
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
On Thu, Aug 02, 2018 at 11:47:13AM +0800, Dou Liyang wrote:
>Hi Fan,
>
>At 07/23/2018 05:29 PM, Chao Fan wrote:
>> If 'CONFIG_MEMORY_HOTREMOVE' specified, walk the acpi srat memory
>> tables, store the immovable memory regions, so that kaslr can get
>> the information abouth where can be selected or not.
>> If 'CONFIG_MEMORY_HOTREMOVE' not specified, go on the old code.
>>
>> Signed-off-by: Chao Fan
>> ---
>> arch/x86/boot/compressed/kaslr.c | 55
>> 1 file changed, 55 insertions(+)
>>
>> diff --git a/arch/x86/boot/compressed/kaslr.c
>> b/arch/x86/boot/compressed/kaslr.c
>> index 531c9876f573..4705682caf1f 100644
>> --- a/arch/x86/boot/compressed/kaslr.c
>> +++ b/arch/x86/boot/compressed/kaslr.c
>> @@ -31,6 +31,7 @@
>> #include "misc.h"
>> #include "error.h"
>> +#include "acpitb.h"
>> #include "../string.h"
>> #include
>> @@ -104,6 +105,14 @@ static bool memmap_too_large;
>> /* Store memory limit specified by "mem=nn[KMG]" or "memmap=nn[KMG]" */
>> unsigned long long mem_limit = ULLONG_MAX;
>> +#ifdef CONFIG_MEMORY_HOTREMOVE
>> +/* Store the immovable memory regions */
>> +struct mem_vector immovable_mem[];
>> +
>> +/* Store the amount of immovable memory regions */
>> +static int num_immovable_mem;
>> +#endif
>> +
>> enum mem_avoid_index {
>> MEM_AVOID_ZO_RANGE = 0,
>> @@ -298,6 +307,47 @@ static int handle_mem_options(void)
>> return 0;
>> }
>> +#ifdef CONFIG_MEMORY_HOTREMOVE
>> +/*
>> + * According to ACPI table, filter the immvoable memory regions
>> + * and store them in immovable_mem[].
>> + */
>> +static void handle_immovable_mem(void)
>> +{
>> +struct acpi_table_header *table_header;
>> +struct acpi_subtable_header *table;
>> +struct acpi_srat_mem_affinity *ma;
>> +unsigned long table_size;
>> +unsigned long table_end;
>> +int i = 0;
>> +
>> +table_header = get_acpi_srat_table();
>> +
>> +if (!table_header)
>> +return;
>> +
>> +table_end = (unsigned long)table_header + table_header->length;
>> +
>> +table = (struct acpi_subtable_header *)
>> +((unsigned long)table_header + sizeof(struct acpi_table_srat));
>> +
>> +table_size = sizeof(struct acpi_subtable_header);
>
>table_size isn't used, can be remove.
>
Thank you very much, will update in next version.
Thanks,
Chao Fan
>> +while (((unsigned long)table) + table->length < table_end) {
>> +if (table->type == 1) {
>> +ma = (struct acpi_srat_mem_affinity *)table;
>> +if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
>> +immovable_mem[i].start = ma->base_address;
>> +immovable_mem[i].size = ma->length;
>> +i++;
>
>need a check(i < MAX_NUMNODES*2) before doing that in case of
>__IndexOutOfBoundsException__ even if it may be impossible in ACPI.
>
>Thanks,
> dou
>> +}
>> +}
>> +table = (struct acpi_subtable_header *)
>> +((unsigned long)table + table->length);
>> +}
>> +num_immovable_mem = i;
>> +}
>> +#endif
>> +
>> /*
>>* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
>>* The mem_avoid array is used to store the ranges that need to be avoided
>> @@ -421,6 +471,11 @@ static void mem_avoid_init(unsigned long input,
>> unsigned long input_size,
>> /* Mark the memmap regions we need to avoid */
>> handle_mem_options();
>> +#ifdef CONFIG_MEMORY_HOTREMOVE
>> +/* Mark the immovable regions we need to choose */
>> +handle_immovable_mem();
>> +#endif
>> +
>> #ifdef CONFIG_X86_VERBOSE_BOOTUP
>> /* Make sure video RAM can be used. */
>> add_identity_map(0, PMD_SIZE);
>>
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
On Thu, Aug 02, 2018 at 11:47:13AM +0800, Dou Liyang wrote:
>Hi Fan,
>
>At 07/23/2018 05:29 PM, Chao Fan wrote:
>> If 'CONFIG_MEMORY_HOTREMOVE' specified, walk the acpi srat memory
>> tables, store the immovable memory regions, so that kaslr can get
>> the information abouth where can be selected or not.
>> If 'CONFIG_MEMORY_HOTREMOVE' not specified, go on the old code.
>>
>> Signed-off-by: Chao Fan
>> ---
>> arch/x86/boot/compressed/kaslr.c | 55
>> 1 file changed, 55 insertions(+)
>>
>> diff --git a/arch/x86/boot/compressed/kaslr.c
>> b/arch/x86/boot/compressed/kaslr.c
>> index 531c9876f573..4705682caf1f 100644
>> --- a/arch/x86/boot/compressed/kaslr.c
>> +++ b/arch/x86/boot/compressed/kaslr.c
>> @@ -31,6 +31,7 @@
>> #include "misc.h"
>> #include "error.h"
>> +#include "acpitb.h"
>> #include "../string.h"
>> #include
>> @@ -104,6 +105,14 @@ static bool memmap_too_large;
>> /* Store memory limit specified by "mem=nn[KMG]" or "memmap=nn[KMG]" */
>> unsigned long long mem_limit = ULLONG_MAX;
>> +#ifdef CONFIG_MEMORY_HOTREMOVE
>> +/* Store the immovable memory regions */
>> +struct mem_vector immovable_mem[];
>> +
>> +/* Store the amount of immovable memory regions */
>> +static int num_immovable_mem;
>> +#endif
>> +
>> enum mem_avoid_index {
>> MEM_AVOID_ZO_RANGE = 0,
>> @@ -298,6 +307,47 @@ static int handle_mem_options(void)
>> return 0;
>> }
>> +#ifdef CONFIG_MEMORY_HOTREMOVE
>> +/*
>> + * According to ACPI table, filter the immvoable memory regions
>> + * and store them in immovable_mem[].
>> + */
>> +static void handle_immovable_mem(void)
>> +{
>> +struct acpi_table_header *table_header;
>> +struct acpi_subtable_header *table;
>> +struct acpi_srat_mem_affinity *ma;
>> +unsigned long table_size;
>> +unsigned long table_end;
>> +int i = 0;
>> +
>> +table_header = get_acpi_srat_table();
>> +
>> +if (!table_header)
>> +return;
>> +
>> +table_end = (unsigned long)table_header + table_header->length;
>> +
>> +table = (struct acpi_subtable_header *)
>> +((unsigned long)table_header + sizeof(struct acpi_table_srat));
>> +
>> +table_size = sizeof(struct acpi_subtable_header);
>
>table_size isn't used, can be remove.
>
Thank you very much, will update in next version.
Thanks,
Chao Fan
>> +while (((unsigned long)table) + table->length < table_end) {
>> +if (table->type == 1) {
>> +ma = (struct acpi_srat_mem_affinity *)table;
>> +if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
>> +immovable_mem[i].start = ma->base_address;
>> +immovable_mem[i].size = ma->length;
>> +i++;
>
>need a check(i < MAX_NUMNODES*2) before doing that in case of
>__IndexOutOfBoundsException__ even if it may be impossible in ACPI.
>
>Thanks,
> dou
>> +}
>> +}
>> +table = (struct acpi_subtable_header *)
>> +((unsigned long)table + table->length);
>> +}
>> +num_immovable_mem = i;
>> +}
>> +#endif
>> +
>> /*
>>* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
>>* The mem_avoid array is used to store the ranges that need to be avoided
>> @@ -421,6 +471,11 @@ static void mem_avoid_init(unsigned long input,
>> unsigned long input_size,
>> /* Mark the memmap regions we need to avoid */
>> handle_mem_options();
>> +#ifdef CONFIG_MEMORY_HOTREMOVE
>> +/* Mark the immovable regions we need to choose */
>> +handle_immovable_mem();
>> +#endif
>> +
>> #ifdef CONFIG_X86_VERBOSE_BOOTUP
>> /* Make sure video RAM can be used. */
>> add_identity_map(0, PMD_SIZE);
>>
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
Hi Fan,
At 07/23/2018 05:29 PM, Chao Fan wrote:
If 'CONFIG_MEMORY_HOTREMOVE' specified, walk the acpi srat memory
tables, store the immovable memory regions, so that kaslr can get
the information abouth where can be selected or not.
If 'CONFIG_MEMORY_HOTREMOVE' not specified, go on the old code.
Signed-off-by: Chao Fan
---
arch/x86/boot/compressed/kaslr.c | 55
1 file changed, 55 insertions(+)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 531c9876f573..4705682caf1f 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -31,6 +31,7 @@
#include "misc.h"
#include "error.h"
+#include "acpitb.h"
#include "../string.h"
#include
@@ -104,6 +105,14 @@ static bool memmap_too_large;
/* Store memory limit specified by "mem=nn[KMG]" or "memmap=nn[KMG]" */
unsigned long long mem_limit = ULLONG_MAX;
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/* Store the immovable memory regions */
+struct mem_vector immovable_mem[];
+
+/* Store the amount of immovable memory regions */
+static int num_immovable_mem;
+#endif
+
enum mem_avoid_index {
MEM_AVOID_ZO_RANGE = 0,
@@ -298,6 +307,47 @@ static int handle_mem_options(void)
return 0;
}
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/*
+ * According to ACPI table, filter the immvoable memory regions
+ * and store them in immovable_mem[].
+ */
+static void handle_immovable_mem(void)
+{
+ struct acpi_table_header *table_header;
+ struct acpi_subtable_header *table;
+ struct acpi_srat_mem_affinity *ma;
+ unsigned long table_size;
+ unsigned long table_end;
+ int i = 0;
+
+ table_header = get_acpi_srat_table();
+
+ if (!table_header)
+ return;
+
+ table_end = (unsigned long)table_header + table_header->length;
+
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table_header + sizeof(struct acpi_table_srat));
+
+ table_size = sizeof(struct acpi_subtable_header);
table_size isn't used, can be remove.
+ while (((unsigned long)table) + table->length < table_end) {
+ if (table->type == 1) {
+ ma = (struct acpi_srat_mem_affinity *)table;
+ if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
+ immovable_mem[i].start = ma->base_address;
+ immovable_mem[i].size = ma->length;
+ i++;
need a check(i < MAX_NUMNODES*2) before doing that in case of
__IndexOutOfBoundsException__ even if it may be impossible in ACPI.
Thanks,
dou
+ }
+ }
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table + table->length);
+ }
+ num_immovable_mem = i;
+}
+#endif
+
/*
* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
* The mem_avoid array is used to store the ranges that need to be avoided
@@ -421,6 +471,11 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
/* Mark the memmap regions we need to avoid */
handle_mem_options();
+#ifdef CONFIG_MEMORY_HOTREMOVE
+ /* Mark the immovable regions we need to choose */
+ handle_immovable_mem();
+#endif
+
#ifdef CONFIG_X86_VERBOSE_BOOTUP
/* Make sure video RAM can be used. */
add_identity_map(0, PMD_SIZE);
Re: [PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
Hi Fan,
At 07/23/2018 05:29 PM, Chao Fan wrote:
If 'CONFIG_MEMORY_HOTREMOVE' specified, walk the acpi srat memory
tables, store the immovable memory regions, so that kaslr can get
the information abouth where can be selected or not.
If 'CONFIG_MEMORY_HOTREMOVE' not specified, go on the old code.
Signed-off-by: Chao Fan
---
arch/x86/boot/compressed/kaslr.c | 55
1 file changed, 55 insertions(+)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 531c9876f573..4705682caf1f 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -31,6 +31,7 @@
#include "misc.h"
#include "error.h"
+#include "acpitb.h"
#include "../string.h"
#include
@@ -104,6 +105,14 @@ static bool memmap_too_large;
/* Store memory limit specified by "mem=nn[KMG]" or "memmap=nn[KMG]" */
unsigned long long mem_limit = ULLONG_MAX;
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/* Store the immovable memory regions */
+struct mem_vector immovable_mem[];
+
+/* Store the amount of immovable memory regions */
+static int num_immovable_mem;
+#endif
+
enum mem_avoid_index {
MEM_AVOID_ZO_RANGE = 0,
@@ -298,6 +307,47 @@ static int handle_mem_options(void)
return 0;
}
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/*
+ * According to ACPI table, filter the immvoable memory regions
+ * and store them in immovable_mem[].
+ */
+static void handle_immovable_mem(void)
+{
+ struct acpi_table_header *table_header;
+ struct acpi_subtable_header *table;
+ struct acpi_srat_mem_affinity *ma;
+ unsigned long table_size;
+ unsigned long table_end;
+ int i = 0;
+
+ table_header = get_acpi_srat_table();
+
+ if (!table_header)
+ return;
+
+ table_end = (unsigned long)table_header + table_header->length;
+
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table_header + sizeof(struct acpi_table_srat));
+
+ table_size = sizeof(struct acpi_subtable_header);
table_size isn't used, can be remove.
+ while (((unsigned long)table) + table->length < table_end) {
+ if (table->type == 1) {
+ ma = (struct acpi_srat_mem_affinity *)table;
+ if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
+ immovable_mem[i].start = ma->base_address;
+ immovable_mem[i].size = ma->length;
+ i++;
need a check(i < MAX_NUMNODES*2) before doing that in case of
__IndexOutOfBoundsException__ even if it may be impossible in ACPI.
Thanks,
dou
+ }
+ }
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table + table->length);
+ }
+ num_immovable_mem = i;
+}
+#endif
+
/*
* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
* The mem_avoid array is used to store the ranges that need to be avoided
@@ -421,6 +471,11 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
/* Mark the memmap regions we need to avoid */
handle_mem_options();
+#ifdef CONFIG_MEMORY_HOTREMOVE
+ /* Mark the immovable regions we need to choose */
+ handle_immovable_mem();
+#endif
+
#ifdef CONFIG_X86_VERBOSE_BOOTUP
/* Make sure video RAM can be used. */
add_identity_map(0, PMD_SIZE);
[PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
If 'CONFIG_MEMORY_HOTREMOVE' specified, walk the acpi srat memory
tables, store the immovable memory regions, so that kaslr can get
the information abouth where can be selected or not.
If 'CONFIG_MEMORY_HOTREMOVE' not specified, go on the old code.
Signed-off-by: Chao Fan
---
arch/x86/boot/compressed/kaslr.c | 55
1 file changed, 55 insertions(+)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 531c9876f573..4705682caf1f 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -31,6 +31,7 @@
#include "misc.h"
#include "error.h"
+#include "acpitb.h"
#include "../string.h"
#include
@@ -104,6 +105,14 @@ static bool memmap_too_large;
/* Store memory limit specified by "mem=nn[KMG]" or "memmap=nn[KMG]" */
unsigned long long mem_limit = ULLONG_MAX;
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/* Store the immovable memory regions */
+struct mem_vector immovable_mem[MAX_NUMNODES*2];
+
+/* Store the amount of immovable memory regions */
+static int num_immovable_mem;
+#endif
+
enum mem_avoid_index {
MEM_AVOID_ZO_RANGE = 0,
@@ -298,6 +307,47 @@ static int handle_mem_options(void)
return 0;
}
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/*
+ * According to ACPI table, filter the immvoable memory regions
+ * and store them in immovable_mem[].
+ */
+static void handle_immovable_mem(void)
+{
+ struct acpi_table_header *table_header;
+ struct acpi_subtable_header *table;
+ struct acpi_srat_mem_affinity *ma;
+ unsigned long table_size;
+ unsigned long table_end;
+ int i = 0;
+
+ table_header = get_acpi_srat_table();
+
+ if (!table_header)
+ return;
+
+ table_end = (unsigned long)table_header + table_header->length;
+
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table_header + sizeof(struct acpi_table_srat));
+
+ table_size = sizeof(struct acpi_subtable_header);
+ while (((unsigned long)table) + table->length < table_end) {
+ if (table->type == 1) {
+ ma = (struct acpi_srat_mem_affinity *)table;
+ if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
+ immovable_mem[i].start = ma->base_address;
+ immovable_mem[i].size = ma->length;
+ i++;
+ }
+ }
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table + table->length);
+ }
+ num_immovable_mem = i;
+}
+#endif
+
/*
* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
* The mem_avoid array is used to store the ranges that need to be avoided
@@ -421,6 +471,11 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
/* Mark the memmap regions we need to avoid */
handle_mem_options();
+#ifdef CONFIG_MEMORY_HOTREMOVE
+ /* Mark the immovable regions we need to choose */
+ handle_immovable_mem();
+#endif
+
#ifdef CONFIG_X86_VERBOSE_BOOTUP
/* Make sure video RAM can be used. */
add_identity_map(0, PMD_SIZE);
--
2.17.1
[PATCH v4 3/4] x86/boot/KASLR: Walk srat tables to filter immovable memory
If 'CONFIG_MEMORY_HOTREMOVE' specified, walk the acpi srat memory
tables, store the immovable memory regions, so that kaslr can get
the information abouth where can be selected or not.
If 'CONFIG_MEMORY_HOTREMOVE' not specified, go on the old code.
Signed-off-by: Chao Fan
---
arch/x86/boot/compressed/kaslr.c | 55
1 file changed, 55 insertions(+)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 531c9876f573..4705682caf1f 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -31,6 +31,7 @@
#include "misc.h"
#include "error.h"
+#include "acpitb.h"
#include "../string.h"
#include
@@ -104,6 +105,14 @@ static bool memmap_too_large;
/* Store memory limit specified by "mem=nn[KMG]" or "memmap=nn[KMG]" */
unsigned long long mem_limit = ULLONG_MAX;
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/* Store the immovable memory regions */
+struct mem_vector immovable_mem[MAX_NUMNODES*2];
+
+/* Store the amount of immovable memory regions */
+static int num_immovable_mem;
+#endif
+
enum mem_avoid_index {
MEM_AVOID_ZO_RANGE = 0,
@@ -298,6 +307,47 @@ static int handle_mem_options(void)
return 0;
}
+#ifdef CONFIG_MEMORY_HOTREMOVE
+/*
+ * According to ACPI table, filter the immvoable memory regions
+ * and store them in immovable_mem[].
+ */
+static void handle_immovable_mem(void)
+{
+ struct acpi_table_header *table_header;
+ struct acpi_subtable_header *table;
+ struct acpi_srat_mem_affinity *ma;
+ unsigned long table_size;
+ unsigned long table_end;
+ int i = 0;
+
+ table_header = get_acpi_srat_table();
+
+ if (!table_header)
+ return;
+
+ table_end = (unsigned long)table_header + table_header->length;
+
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table_header + sizeof(struct acpi_table_srat));
+
+ table_size = sizeof(struct acpi_subtable_header);
+ while (((unsigned long)table) + table->length < table_end) {
+ if (table->type == 1) {
+ ma = (struct acpi_srat_mem_affinity *)table;
+ if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
+ immovable_mem[i].start = ma->base_address;
+ immovable_mem[i].size = ma->length;
+ i++;
+ }
+ }
+ table = (struct acpi_subtable_header *)
+ ((unsigned long)table + table->length);
+ }
+ num_immovable_mem = i;
+}
+#endif
+
/*
* In theory, KASLR can put the kernel anywhere in the range of [16M, 64T).
* The mem_avoid array is used to store the ranges that need to be avoided
@@ -421,6 +471,11 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
/* Mark the memmap regions we need to avoid */
handle_mem_options();
+#ifdef CONFIG_MEMORY_HOTREMOVE
+ /* Mark the immovable regions we need to choose */
+ handle_immovable_mem();
+#endif
+
#ifdef CONFIG_X86_VERBOSE_BOOTUP
/* Make sure video RAM can be used. */
add_identity_map(0, PMD_SIZE);
--
2.17.1
