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Diffstat (limited to 'arch/x86/kernel/cpu/mtrr/cleanup.c')
-rw-r--r--arch/x86/kernel/cpu/mtrr/cleanup.c159
1 files changed, 73 insertions, 86 deletions
diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
index 5f90b85ff22e..763534d77f59 100644
--- a/arch/x86/kernel/cpu/mtrr/cleanup.c
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: LGPL-2.0+
/*
* MTRR (Memory Type Range Register) cleanup
*
* Copyright (C) 2009 Yinghai Lu
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/smp.h>
@@ -28,7 +14,7 @@
#include <linux/range.h>
#include <asm/processor.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
@@ -56,10 +42,7 @@ static int __initdata nr_range;
static struct var_mtrr_range_state __initdata range_state[RANGE_NUM];
-static int __initdata debug_print;
-#define Dprintk(x...) do { if (debug_print) printk(KERN_DEBUG x); } while (0)
-
-#define BIOS_BUG_MSG KERN_WARNING \
+#define BIOS_BUG_MSG \
"WARNING: BIOS bug: VAR MTRR %d contains strange UC entry under 1M, check with your system vendor!\n"
static int __init
@@ -80,12 +63,11 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
nr_range = add_range_with_merge(range, RANGE_NUM, nr_range,
base, base + size);
}
- if (debug_print) {
- printk(KERN_DEBUG "After WB checking\n");
- for (i = 0; i < nr_range; i++)
- printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- range[i].start, range[i].end);
- }
+
+ Dprintk("After WB checking\n");
+ for (i = 0; i < nr_range; i++)
+ Dprintk("MTRR MAP PFN: %016llx - %016llx\n",
+ range[i].start, range[i].end);
/* Take out UC ranges: */
for (i = 0; i < num_var_ranges; i++) {
@@ -98,9 +80,10 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
continue;
base = range_state[i].base_pfn;
if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed &&
- (mtrr_state.enabled & 1)) {
+ (mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED) &&
+ (mtrr_state.enabled & MTRR_STATE_MTRR_FIXED_ENABLED)) {
/* Var MTRR contains UC entry below 1M? Skip it: */
- printk(BIOS_BUG_MSG, i);
+ pr_warn(BIOS_BUG_MSG, i);
if (base + size <= (1<<(20-PAGE_SHIFT)))
continue;
size -= (1<<(20-PAGE_SHIFT)) - base;
@@ -112,24 +95,22 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
subtract_range(range, RANGE_NUM, extra_remove_base,
extra_remove_base + extra_remove_size);
- if (debug_print) {
- printk(KERN_DEBUG "After UC checking\n");
- for (i = 0; i < RANGE_NUM; i++) {
- if (!range[i].end)
- continue;
- printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- range[i].start, range[i].end);
- }
+ Dprintk("After UC checking\n");
+ for (i = 0; i < RANGE_NUM; i++) {
+ if (!range[i].end)
+ continue;
+
+ Dprintk("MTRR MAP PFN: %016llx - %016llx\n",
+ range[i].start, range[i].end);
}
/* sort the ranges */
nr_range = clean_sort_range(range, RANGE_NUM);
- if (debug_print) {
- printk(KERN_DEBUG "After sorting\n");
- for (i = 0; i < nr_range; i++)
- printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- range[i].start, range[i].end);
- }
+
+ Dprintk("After sorting\n");
+ for (i = 0; i < nr_range; i++)
+ Dprintk("MTRR MAP PFN: %016llx - %016llx\n",
+ range[i].start, range[i].end);
return nr_range;
}
@@ -164,16 +145,9 @@ static int __init enable_mtrr_cleanup_setup(char *str)
}
early_param("enable_mtrr_cleanup", enable_mtrr_cleanup_setup);
-static int __init mtrr_cleanup_debug_setup(char *str)
-{
- debug_print = 1;
- return 0;
-}
-early_param("mtrr_cleanup_debug", mtrr_cleanup_debug_setup);
-
static void __init
set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
- unsigned char type, unsigned int address_bits)
+ unsigned char type)
{
u32 base_lo, base_hi, mask_lo, mask_hi;
u64 base, mask;
@@ -183,7 +157,7 @@ set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
return;
}
- mask = (1ULL << address_bits) - 1;
+ mask = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
mask &= ~((((u64)sizek) << 10) - 1);
base = ((u64)basek) << 10;
@@ -209,7 +183,7 @@ save_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
range_state[reg].type = type;
}
-static void __init set_var_mtrr_all(unsigned int address_bits)
+static void __init set_var_mtrr_all(void)
{
unsigned long basek, sizek;
unsigned char type;
@@ -220,7 +194,7 @@ static void __init set_var_mtrr_all(unsigned int address_bits)
sizek = range_state[reg].size_pfn << (PAGE_SHIFT - 10);
type = range_state[reg].type;
- set_var_mtrr(reg, basek, sizek, type, address_bits);
+ set_var_mtrr(reg, basek, sizek, type);
}
}
@@ -267,7 +241,7 @@ range_to_mtrr(unsigned int reg, unsigned long range_startk,
align = max_align;
sizek = 1UL << align;
- if (debug_print) {
+ if (mtrr_debug) {
char start_factor = 'K', size_factor = 'K';
unsigned long start_base, size_base;
@@ -296,7 +270,7 @@ range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek,
unsigned long sizek)
{
unsigned long hole_basek, hole_sizek;
- unsigned long second_basek, second_sizek;
+ unsigned long second_sizek;
unsigned long range0_basek, range0_sizek;
unsigned long range_basek, range_sizek;
unsigned long chunk_sizek;
@@ -304,7 +278,6 @@ range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek,
hole_basek = 0;
hole_sizek = 0;
- second_basek = 0;
second_sizek = 0;
chunk_sizek = state->chunk_sizek;
gran_sizek = state->gran_sizek;
@@ -435,7 +408,7 @@ set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn,
state->range_sizek = sizek - second_sizek;
}
-/* Mininum size of mtrr block that can take hole: */
+/* Minimum size of mtrr block that can take hole: */
static u64 mtrr_chunk_size __initdata = (256ULL<<20);
static int __init parse_mtrr_chunk_size_opt(char *p)
@@ -538,12 +511,12 @@ static void __init print_out_mtrr_range_state(void)
if (!size_base)
continue;
- size_base = to_size_factor(size_base, &size_factor),
+ size_base = to_size_factor(size_base, &size_factor);
start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
- start_base = to_size_factor(start_base, &start_factor),
+ start_base = to_size_factor(start_base, &start_factor);
type = range_state[i].type;
- printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
+ Dprintk("reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
i, start_base, start_factor,
size_base, size_factor,
(type == MTRR_TYPE_UNCACHABLE) ? "UC" :
@@ -592,9 +565,16 @@ mtrr_calc_range_state(u64 chunk_size, u64 gran_size,
unsigned long x_remove_base,
unsigned long x_remove_size, int i)
{
- static struct range range_new[RANGE_NUM];
+ /*
+ * range_new should really be an automatic variable, but
+ * putting 4096 bytes on the stack is frowned upon, to put it
+ * mildly. It is safe to make it a static __initdata variable,
+ * since mtrr_calc_range_state is only called during init and
+ * there's no way it will call itself recursively.
+ */
+ static struct range range_new[RANGE_NUM] __initdata;
unsigned long range_sums_new;
- static int nr_range_new;
+ int nr_range_new;
int num_reg;
/* Convert ranges to var ranges state: */
@@ -674,7 +654,7 @@ static int __init mtrr_search_optimal_index(void)
return index_good;
}
-int __init mtrr_cleanup(unsigned address_bits)
+int __init mtrr_cleanup(void)
{
unsigned long x_remove_base, x_remove_size;
unsigned long base, size, def, dummy;
@@ -683,7 +663,10 @@ int __init mtrr_cleanup(unsigned address_bits)
int index_good;
int i;
- if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
+ if (!mtrr_enabled())
+ return 0;
+
+ if (!cpu_feature_enabled(X86_FEATURE_MTRR) || enable_mtrr_cleanup < 1)
return 0;
rdmsr(MSR_MTRRdefType, def, dummy);
@@ -705,7 +688,7 @@ int __init mtrr_cleanup(unsigned address_bits)
return 0;
/* Print original var MTRRs at first, for debugging: */
- printk(KERN_DEBUG "original variable MTRRs\n");
+ Dprintk("original variable MTRRs\n");
print_out_mtrr_range_state();
memset(range, 0, sizeof(range));
@@ -725,7 +708,7 @@ int __init mtrr_cleanup(unsigned address_bits)
x_remove_base, x_remove_size);
range_sums = sum_ranges(range, nr_range);
- printk(KERN_INFO "total RAM covered: %ldM\n",
+ pr_info("total RAM covered: %ldM\n",
range_sums >> (20 - PAGE_SHIFT));
if (mtrr_chunk_size && mtrr_gran_size) {
@@ -736,13 +719,12 @@ int __init mtrr_cleanup(unsigned address_bits)
mtrr_print_out_one_result(i);
if (!result[i].bad) {
- set_var_mtrr_all(address_bits);
- printk(KERN_DEBUG "New variable MTRRs\n");
+ set_var_mtrr_all();
+ Dprintk("New variable MTRRs\n");
print_out_mtrr_range_state();
return 1;
}
- printk(KERN_INFO "invalid mtrr_gran_size or mtrr_chunk_size, "
- "will find optimal one\n");
+ pr_info("invalid mtrr_gran_size or mtrr_chunk_size, will find optimal one\n");
}
i = 0;
@@ -758,9 +740,9 @@ int __init mtrr_cleanup(unsigned address_bits)
mtrr_calc_range_state(chunk_size, gran_size,
x_remove_base, x_remove_size, i);
- if (debug_print) {
+ if (mtrr_debug) {
mtrr_print_out_one_result(i);
- printk(KERN_INFO "\n");
+ pr_info("\n");
}
i++;
@@ -771,7 +753,7 @@ int __init mtrr_cleanup(unsigned address_bits)
index_good = mtrr_search_optimal_index();
if (index_good != -1) {
- printk(KERN_INFO "Found optimal setting for mtrr clean up\n");
+ pr_info("Found optimal setting for mtrr clean up\n");
i = index_good;
mtrr_print_out_one_result(i);
@@ -781,8 +763,8 @@ int __init mtrr_cleanup(unsigned address_bits)
gran_size = result[i].gran_sizek;
gran_size <<= 10;
x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
- set_var_mtrr_all(address_bits);
- printk(KERN_DEBUG "New variable MTRRs\n");
+ set_var_mtrr_all();
+ Dprintk("New variable MTRRs\n");
print_out_mtrr_range_state();
return 1;
} else {
@@ -791,13 +773,13 @@ int __init mtrr_cleanup(unsigned address_bits)
mtrr_print_out_one_result(i);
}
- printk(KERN_INFO "mtrr_cleanup: can not find optimal value\n");
- printk(KERN_INFO "please specify mtrr_gran_size/mtrr_chunk_size\n");
+ pr_info("mtrr_cleanup: can not find optimal value\n");
+ pr_info("please specify mtrr_gran_size/mtrr_chunk_size\n");
return 0;
}
#else
-int __init mtrr_cleanup(unsigned address_bits)
+int __init mtrr_cleanup(void)
{
return 0;
}
@@ -825,12 +807,13 @@ int __init amd_special_default_mtrr(void)
{
u32 l, h;
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+ boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
return 0;
if (boot_cpu_data.x86 < 0xf)
return 0;
/* In case some hypervisor doesn't pass SYSCFG through: */
- if (rdmsr_safe(MSR_K8_SYSCFG, &l, &h) < 0)
+ if (rdmsr_safe(MSR_AMD64_SYSCFG, &l, &h) < 0)
return 0;
/*
* Memory between 4GB and top of mem is forced WB by this magic bit.
@@ -854,7 +837,7 @@ real_trim_memory(unsigned long start_pfn, unsigned long limit_pfn)
trim_size <<= PAGE_SHIFT;
trim_size -= trim_start;
- return e820_update_range(trim_start, trim_size, E820_RAM, E820_RESERVED);
+ return e820__range_update(trim_start, trim_size, E820_TYPE_RAM, E820_TYPE_RESERVED);
}
/**
@@ -876,15 +859,18 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
/* extra one for all 0 */
int num[MTRR_NUM_TYPES + 1];
+ if (!mtrr_enabled())
+ return 0;
+
/*
* Make sure we only trim uncachable memory on machines that
* support the Intel MTRR architecture:
*/
- if (!is_cpu(INTEL) || disable_mtrr_trim)
+ if (!cpu_feature_enabled(X86_FEATURE_MTRR) || disable_mtrr_trim)
return 0;
rdmsr(MSR_MTRRdefType, def, dummy);
- def &= 0xff;
+ def &= MTRR_DEF_TYPE_TYPE;
if (def != MTRR_TYPE_UNCACHABLE)
return 0;
@@ -910,7 +896,7 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
/* kvm/qemu doesn't have mtrr set right, don't trim them all: */
if (!highest_pfn) {
- printk(KERN_INFO "CPU MTRRs all blank - virtualized system.\n");
+ pr_info("CPU MTRRs all blank - virtualized system.\n");
return 0;
}
@@ -965,13 +951,14 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
end_pfn);
if (total_trim_size) {
- pr_warning("WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing %lluMB of RAM.\n", total_trim_size >> 20);
+ pr_warn("WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing %lluMB of RAM.\n",
+ total_trim_size >> 20);
if (!changed_by_mtrr_cleanup)
WARN_ON(1);
pr_info("update e820 for mtrr\n");
- update_e820();
+ e820__update_table_print();
return 1;
}
generated by cgit (git 2.34.1) at 2025-12-25 09:48:54 +0000