| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1392786649-5516-1-git-send-email-hanjun.guo@linaro.org>
Date: Wed, 19 Feb 2014 13:10:49 +0800
From: Hanjun Guo <hanjun.guo@...aro.org>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Lan Tianyu <tianyu.lan@...el.com>, Joe Perches <joe@...ches.com>,
linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
Hanjun Guo <hanjun.guo@...aro.org>,
Tony Luck <tony.luck@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
linux-ia64@...r.kernel.org,
Graeme Gregory <graeme.gregory@...aro.org>
Subject: [RESEND][PATCH v5 2/5] ACPI / processor_core: Rework _PDC related stuff to make it more arch-independent
_PDC related stuff in processor_core.c is little bit X86/IA64
dependent, macros of ACPI_PDC_* are _PDC bit definitions for
Intel processors, if we use these macros in processor_core.c,
we can not compile it when ACPI is enabled on ARM/ARM64.
This patch reworks the code to make it more arch-independent,
moving Intel related _PDC bits into architecture directory,
no functional change.
Cc: Tony Luck <tony.luck@...el.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
Cc: linux-ia64@...r.kernel.org
Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@...aro.org>
---
Hi Tony, Fenghua, Thomas, Peter, this patch was reviewed
in ACPI mailling list, and updated for serveral versions,
Rafael needs your opinion on this patch, could you please
review and ack it?
Thanks
Hanjun
---
arch/ia64/include/asm/acpi.h | 5 +----
arch/ia64/kernel/acpi.c | 14 ++++++++++++++
arch/x86/include/asm/acpi.h | 19 +------------------
arch/x86/kernel/acpi/cstate.c | 29 +++++++++++++++++++++++++++++
drivers/acpi/processor_core.c | 19 +------------------
5 files changed, 46 insertions(+), 40 deletions(-)
diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h
index d651102..d2b8b9d 100644
--- a/arch/ia64/include/asm/acpi.h
+++ b/arch/ia64/include/asm/acpi.h
@@ -152,10 +152,7 @@ extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
#endif
static inline bool arch_has_acpi_pdc(void) { return true; }
-static inline void arch_acpi_set_pdc_bits(u32 *buf)
-{
- buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
-}
+extern void arch_acpi_set_pdc_bits(u32 *buf);
#define acpi_unlazy_tlb(x)
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 07d209c..af9d9e4 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -1014,3 +1014,17 @@ EXPORT_SYMBOL(acpi_unregister_ioapic);
* TBD when when IA64 starts to support suspend...
*/
int acpi_suspend_lowlevel(void) { return 0; }
+
+void arch_acpi_set_pdc_bits(u32 *buf)
+{
+ /* Enable coordination with firmware's _TSD info */
+ buf[2] |= ACPI_PDC_SMP_T_SWCOORD | ACPI_PDC_EST_CAPABILITY_SMP;
+ if (boot_option_idle_override == IDLE_NOMWAIT) {
+ /*
+ * If mwait is disabled for CPU C-states, the C2C3_FFH access
+ * mode will be disabled in the parameter of _PDC object.
+ * Of course C1_FFH access mode will also be disabled.
+ */
+ buf[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
+ }
+}
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index c8c1e70..e9f71bc 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -147,24 +147,7 @@ static inline bool arch_has_acpi_pdc(void)
c->x86_vendor == X86_VENDOR_CENTAUR);
}
-static inline void arch_acpi_set_pdc_bits(u32 *buf)
-{
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
-
- if (cpu_has(c, X86_FEATURE_EST))
- buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
-
- if (cpu_has(c, X86_FEATURE_ACPI))
- buf[2] |= ACPI_PDC_T_FFH;
-
- /*
- * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
- */
- if (!cpu_has(c, X86_FEATURE_MWAIT))
- buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
-}
+extern void arch_acpi_set_pdc_bits(u32 *buf);
#else /* !CONFIG_ACPI */
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index e69182f..a36638f 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -16,6 +16,35 @@
#include <asm/mwait.h>
#include <asm/special_insns.h>
+void arch_acpi_set_pdc_bits(u32 *buf)
+{
+ struct cpuinfo_x86 *c = &cpu_data(0);
+
+ /* Enable coordination with firmware's _TSD info */
+ buf[2] |= ACPI_PDC_SMP_T_SWCOORD | ACPI_PDC_C_CAPABILITY_SMP;
+
+ if (cpu_has(c, X86_FEATURE_EST))
+ buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
+
+ if (cpu_has(c, X86_FEATURE_ACPI))
+ buf[2] |= ACPI_PDC_T_FFH;
+
+ /*
+ * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
+ */
+ if (!cpu_has(c, X86_FEATURE_MWAIT))
+ buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
+
+ if (boot_option_idle_override == IDLE_NOMWAIT) {
+ /*
+ * If mwait is disabled for CPU C-states, the C2C3_FFH access
+ * mode will be disabled in the parameter of _PDC object.
+ * Of course C1_FFH access mode will also be disabled.
+ */
+ buf[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
+ }
+}
+
/*
* Initialize bm_flags based on the CPU cache properties
* On SMP it depends on cache configuration
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 4d91b32..4dcf776 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -255,9 +255,6 @@ static void acpi_set_pdc_bits(u32 *buf)
buf[0] = ACPI_PDC_REVISION_ID;
buf[1] = 1;
- /* Enable coordination with firmware's _TSD info */
- buf[2] = ACPI_PDC_SMP_T_SWCOORD;
-
/* Twiddle arch-specific bits needed for _PDC */
arch_acpi_set_pdc_bits(buf);
}
@@ -282,7 +279,7 @@ static struct acpi_object_list *acpi_processor_alloc_pdc(void)
return NULL;
}
- buf = kmalloc(12, GFP_KERNEL);
+ buf = kzalloc(12, GFP_KERNEL);
if (!buf) {
printk(KERN_ERR "Memory allocation error\n");
kfree(obj);
@@ -310,20 +307,6 @@ acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
{
acpi_status status = AE_OK;
- if (boot_option_idle_override == IDLE_NOMWAIT) {
- /*
- * If mwait is disabled for CPU C-states, the C2C3_FFH access
- * mode will be disabled in the parameter of _PDC object.
- * Of course C1_FFH access mode will also be disabled.
- */
- union acpi_object *obj;
- u32 *buffer = NULL;
-
- obj = pdc_in->pointer;
- buffer = (u32 *)(obj->buffer.pointer);
- buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
-
- }
status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
if (ACPI_FAILURE(status))
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists