This patch enables the x86 architecture support to Hygon Family
18h CPU:
- X86 architecture for AMD
- Add a new hygon_cpu_dev struct in kernel/cpu/amd.c to register
Hygon CPU device, with CPU vendor ID "HygonGenuine".
- Add amd_get_topology() hygon support to make sure LLC is at the
core complex level.
- Add Hygon support in kernel/cpu/intel_cacheinfo.c to get correct
cache topology and size.
- Add Hygon support in smp_quirk_init_udelay() to enable no delay
as Hygon processors are modern processor.
- Add Hygon support in arch_init_ideal_nops(), mwait_play_dead().
- MTRR for X86
- Add MTRR enablement for Hygon processor.
- NMI watchdog for X86
- Add Hygon support in nmi_perfctr_msr_to_bit() and
nmi_evntsel_msr_to_bit().
Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
arch/x86/include/asm/processor.h | 3 ++-
arch/x86/kernel/alternative.c | 4 ++++
arch/x86/kernel/cpu/amd.c | 14 +++++++++++++-
arch/x86/kernel/cpu/intel_cacheinfo.c | 9 ++++++---
arch/x86/kernel/cpu/mtrr/cleanup.c | 3 ++-
arch/x86/kernel/cpu/mtrr/generic.c | 3 ++-
arch/x86/kernel/cpu/mtrr/main.c | 2 +-
arch/x86/kernel/cpu/perfctr-watchdog.c | 2 ++
arch/x86/kernel/smpboot.c | 4 +++-
9 files changed, 35 insertions(+), 9 deletions(-)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 21a1149..f1b659e 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -153,7 +153,8 @@ enum cpuid_regs_idx {
#define X86_VENDOR_CENTAUR 5
#define X86_VENDOR_TRANSMETA 7
#define X86_VENDOR_NSC 8
-#define X86_VENDOR_NUM 9
+#define X86_VENDOR_HYGON 9
+#define X86_VENDOR_NUM 10
#define X86_VENDOR_UNKNOWN 0xff
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index a481763..8f4925b 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -222,6 +222,10 @@ void __init arch_init_ideal_nops(void)
}
break;
+ case X86_VENDOR_HYGON:
+ ideal_nops = p6_nops;
+ return;
+
case X86_VENDOR_AMD:
if (boot_cpu_data.x86 > 0xf) {
ideal_nops = p6_nops;
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 1b18be3..76b1e7d 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -350,7 +350,7 @@ static void amd_get_topology(struct cpuinfo_x86 *c)
* have an L3 cache by looking at the L3 cache CPUID leaf.
*/
if (cpuid_edx(0x80000006)) {
- if (c->x86 == 0x17) {
+ if (c->x86 == 0x17 || c->x86 == 0x18) {
/*
* LLC is at the core complex level.
* Core complex id is ApicId[3].
@@ -988,6 +988,18 @@ static void cpu_detect_tlb_amd(struct cpuinfo_x86 *c)
tlb_lli_4m[ENTRIES] = tlb_lli_2m[ENTRIES] >> 1;
}
+static const struct cpu_dev hygon_cpu_dev = {
+ .c_vendor = "Hygon",
+ .c_ident = { "HygonGenuine" },
+ .c_early_init = early_init_amd,
+ .c_detect_tlb = cpu_detect_tlb_amd,
+ .c_bsp_init = bsp_init_amd,
+ .c_init = init_amd,
+ .c_x86_vendor = X86_VENDOR_HYGON,
+};
+
+cpu_dev_register(hygon_cpu_dev);
+
static const struct cpu_dev amd_cpu_dev = {
.c_vendor = "AMD",
.c_ident = { "AuthenticAMD" },
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 54d04d5..8d5d542 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -593,7 +593,8 @@ cpuid4_cache_lookup_regs(int index, struct _cpuid4_info_regs *this_leaf)
union _cpuid4_leaf_ecx ecx;
unsigned edx;
- 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) {
if (boot_cpu_has(X86_FEATURE_TOPOEXT))
cpuid_count(0x8000001d, index, &eax.full,
&ebx.full, &ecx.full, &edx);
@@ -623,7 +624,8 @@ static int find_num_cache_leaves(struct cpuinfo_x86 *c)
union _cpuid4_leaf_eax cache_eax;
int i = -1;
- if (c->x86_vendor == X86_VENDOR_AMD)
+ if (c->x86_vendor == X86_VENDOR_AMD ||
+ c->x86_vendor == X86_VENDOR_HYGON)
op = 0x8000001d;
else
op = 4;
@@ -871,7 +873,8 @@ static void __cache_cpumap_setup(unsigned int cpu, int index,
int index_msb, i;
struct cpuinfo_x86 *c = &cpu_data(cpu);
- if (c->x86_vendor == X86_VENDOR_AMD) {
+ if (c->x86_vendor == X86_VENDOR_AMD ||
+ c->x86_vendor == X86_VENDOR_HYGON) {
if (__cache_amd_cpumap_setup(cpu, index, base))
return;
}
diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
index 765afd5..3cd91b0 100644
--- a/arch/x86/kernel/cpu/mtrr/cleanup.c
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -831,7 +831,8 @@ 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;
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index e12ee86..71f868f 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -49,7 +49,8 @@ static inline void k8_check_syscfg_dram_mod_en(void)
{
u32 lo, hi;
- 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) &&
(boot_cpu_data.x86 >= 0x0f)))
return;
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 7468de4..d2a87df 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -126,7 +126,7 @@ static void __init set_num_var_ranges(void)
if (use_intel())
rdmsr(MSR_MTRRcap, config, dummy);
- else if (is_cpu(AMD))
+ else if (is_cpu(AMD) || is_cpu(HYGON))
config = 2;
else if (is_cpu(CYRIX) || is_cpu(CENTAUR))
config = 8;
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index d389083..9556930 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -46,6 +46,7 @@ static inline unsigned int nmi_perfctr_msr_to_bit(unsigned int msr)
{
/* returns the bit offset of the performance counter register */
switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_HYGON:
case X86_VENDOR_AMD:
if (msr >= MSR_F15H_PERF_CTR)
return (msr - MSR_F15H_PERF_CTR) >> 1;
@@ -74,6 +75,7 @@ static inline unsigned int nmi_evntsel_msr_to_bit(unsigned int msr)
{
/* returns the bit offset of the event selection register */
switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_HYGON:
case X86_VENDOR_AMD:
if (msr >= MSR_F15H_PERF_CTL)
return (msr - MSR_F15H_PERF_CTL) >> 1;
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 9dd324a..4304510 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -660,6 +660,7 @@ static void __init smp_quirk_init_udelay(void)
/* if modern processor, use no delay */
if (((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 == 6)) ||
+ ((boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) && (boot_cpu_data.x86 >= 0x18)) ||
((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && (boot_cpu_data.x86 >= 0xF))) {
init_udelay = 0;
return;
@@ -1576,7 +1577,8 @@ static inline void mwait_play_dead(void)
void *mwait_ptr;
int i;
- 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;
if (!this_cpu_has(X86_FEATURE_MWAIT))
return;
--
2.7.4
