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-rw-r--r--arch/arm/kernel/setup.c2
-rw-r--r--arch/arm64/mm/init.c2
-rw-r--r--arch/loongarch/kernel/setup.c2
-rw-r--r--arch/mips/kernel/setup.c2
-rw-r--r--arch/powerpc/kernel/fadump.c2
-rw-r--r--arch/powerpc/kexec/core.c2
-rw-r--r--arch/powerpc/mm/nohash/kaslr_booke.c2
-rw-r--r--arch/riscv/mm/init.c2
-rw-r--r--arch/s390/kernel/setup.c2
-rw-r--r--arch/sh/kernel/machine_kexec.c2
-rw-r--r--arch/x86/kernel/setup.c2
-rw-r--r--include/linux/crash_reserve.h3
-rw-r--r--kernel/crash_reserve.c16
13 files changed, 27 insertions, 14 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index a41c93988d2c..0bfd66c7ada0 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1004,7 +1004,7 @@ static void __init reserve_crashkernel(void)
total_mem = get_total_mem();
ret = parse_crashkernel(boot_command_line, total_mem,
&crash_size, &crash_base,
- NULL, NULL);
+ NULL, NULL, NULL);
/* invalid value specified or crashkernel=0 */
if (ret || !crash_size)
return;
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 0c8c35dd645e..ea84a61ed508 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -106,7 +106,7 @@ static void __init arch_reserve_crashkernel(void)
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base,
- &low_size, &high);
+ &low_size, NULL, &high);
if (ret)
return;
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
index b99fbb388fe0..22b27cd447a1 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -265,7 +265,7 @@ static void __init arch_reserve_crashkernel(void)
return;
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
- &crash_size, &crash_base, &low_size, &high);
+ &crash_size, &crash_base, &low_size, NULL, &high);
if (ret)
return;
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index fbfe0771317e..11b9b6b63e19 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -458,7 +458,7 @@ static void __init mips_parse_crashkernel(void)
total_mem = memblock_phys_mem_size();
ret = parse_crashkernel(boot_command_line, total_mem,
&crash_size, &crash_base,
- NULL, NULL);
+ NULL, NULL, NULL);
if (ret != 0 || crash_size <= 0)
return;
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 8ca49e40c473..28cab25d5b33 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -333,7 +333,7 @@ static __init u64 fadump_calculate_reserve_size(void)
* memory at a predefined offset.
*/
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
- &size, &base, NULL, NULL);
+ &size, &base, NULL, NULL, NULL);
if (ret == 0 && size > 0) {
unsigned long max_size;
diff --git a/arch/powerpc/kexec/core.c b/arch/powerpc/kexec/core.c
index 00e9c267b912..d1a2d755381c 100644
--- a/arch/powerpc/kexec/core.c
+++ b/arch/powerpc/kexec/core.c
@@ -110,7 +110,7 @@ void __init arch_reserve_crashkernel(void)
/* use common parsing */
ret = parse_crashkernel(boot_command_line, total_mem_sz, &crash_size,
- &crash_base, NULL, NULL);
+ &crash_base, NULL, NULL, NULL);
if (ret)
return;
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
index 5c8d1bb98b3e..5e4897daaaea 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -178,7 +178,7 @@ static void __init get_crash_kernel(void *fdt, unsigned long size)
int ret;
ret = parse_crashkernel(boot_command_line, size, &crash_size,
- &crash_base, NULL, NULL);
+ &crash_base, NULL, NULL, NULL);
if (ret != 0 || crash_size == 0)
return;
if (crash_base == 0)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 8d0374d7ce8e..15683ae13fa5 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1408,7 +1408,7 @@ static void __init arch_reserve_crashkernel(void)
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base,
- &low_size, &high);
+ &low_size, NULL, &high);
if (ret)
return;
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index f244c5560e7f..b99aeb0db2ee 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -605,7 +605,7 @@ static void __init reserve_crashkernel(void)
int rc;
rc = parse_crashkernel(boot_command_line, ident_map_size,
- &crash_size, &crash_base, NULL, NULL);
+ &crash_size, &crash_base, NULL, NULL, NULL);
crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN);
crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN);
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index 8321b31d2e19..37073ca1e0ad 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -146,7 +146,7 @@ void __init reserve_crashkernel(void)
return;
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
- &crash_size, &crash_base, NULL, NULL);
+ &crash_size, &crash_base, NULL, NULL, NULL);
if (ret == 0 && crash_size > 0) {
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index fb27be697128..c22dc630c297 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -608,7 +608,7 @@ static void __init arch_reserve_crashkernel(void)
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base,
- &low_size, &high);
+ &low_size, NULL, &high);
if (ret)
return;
diff --git a/include/linux/crash_reserve.h b/include/linux/crash_reserve.h
index 1fe7e7d1b214..e784aaff2f5a 100644
--- a/include/linux/crash_reserve.h
+++ b/include/linux/crash_reserve.h
@@ -16,7 +16,8 @@ extern struct resource crashk_low_res;
int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
unsigned long long *crash_size, unsigned long long *crash_base,
- unsigned long long *low_size, bool *high);
+ unsigned long long *low_size, unsigned long long *cma_size,
+ bool *high);
#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
diff --git a/kernel/crash_reserve.c b/kernel/crash_reserve.c
index acb6bf42e30d..86ae1365d04e 100644
--- a/kernel/crash_reserve.c
+++ b/kernel/crash_reserve.c
@@ -172,17 +172,19 @@ static int __init parse_crashkernel_simple(char *cmdline,
#define SUFFIX_HIGH 0
#define SUFFIX_LOW 1
-#define SUFFIX_NULL 2
+#define SUFFIX_CMA 2
+#define SUFFIX_NULL 3
static __initdata char *suffix_tbl[] = {
[SUFFIX_HIGH] = ",high",
[SUFFIX_LOW] = ",low",
+ [SUFFIX_CMA] = ",cma",
[SUFFIX_NULL] = NULL,
};
/*
* That function parses "suffix" crashkernel command lines like
*
- * crashkernel=size,[high|low]
+ * crashkernel=size,[high|low|cma]
*
* It returns 0 on success and -EINVAL on failure.
*/
@@ -298,9 +300,11 @@ int __init parse_crashkernel(char *cmdline,
unsigned long long *crash_size,
unsigned long long *crash_base,
unsigned long long *low_size,
+ unsigned long long *cma_size,
bool *high)
{
int ret;
+ unsigned long long __always_unused cma_base;
/* crashkernel=X[@offset] */
ret = __parse_crashkernel(cmdline, system_ram, crash_size,
@@ -331,6 +335,14 @@ int __init parse_crashkernel(char *cmdline,
*high = true;
}
+
+ /*
+ * optional CMA reservation
+ * cma_base is ignored
+ */
+ if (cma_size)
+ __parse_crashkernel(cmdline, 0, cma_size,
+ &cma_base, suffix_tbl[SUFFIX_CMA]);
#endif
if (!*crash_size)
ret = -EINVAL;
generated by cgit (git 2.34.1) at 2025-08-06 21:13:23 +0000