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SubjectRe: [PATCH] x86: let 32bit use apic_ops too - fix
On Tue, Jul 15, 2008 at 10:33 AM, Suresh Siddha
<suresh.b.siddha@intel.com> wrote:
> On Sun, Jul 13, 2008 at 10:19:35PM -0700, Yinghai Lu wrote:
>>
>> fix for pv.
>>
>> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
>>
>> ---
>> arch/x86/kernel/paravirt.c | 5 ----
>> arch/x86/kernel/vmi_32.c | 51 ++++++++++++++++++++++++++++++++++++++++++---
>> arch/x86/xen/enlighten.c | 19 +++++++---------
>> include/asm-x86/paravirt.h | 29 -------------------------
>> 4 files changed, 57 insertions(+), 47 deletions(-)
>>
>> Index: linux-2.6/arch/x86/kernel/paravirt.c
>> ===================================================================
>> --- linux-2.6.orig/arch/x86/kernel/paravirt.c
>> +++ linux-2.6/arch/x86/kernel/paravirt.c
>> @@ -373,11 +373,6 @@ struct pv_cpu_ops pv_cpu_ops = {
>>
>> struct pv_apic_ops pv_apic_ops = {
>> #ifdef CONFIG_X86_LOCAL_APIC
>> -#ifndef CONFIG_X86_64
>> - .apic_write = native_apic_mem_write,
>> - .apic_write_atomic = native_apic_mem_write_atomic,
>> - .apic_read = native_apic_mem_read,
>> -#endif
>> .setup_boot_clock = setup_boot_APIC_clock,
>> .setup_secondary_clock = setup_secondary_APIC_clock,
>> .startup_ipi_hook = paravirt_nop,
>> Index: linux-2.6/arch/x86/kernel/vmi_32.c
>> ===================================================================
>> --- linux-2.6.orig/arch/x86/kernel/vmi_32.c
>> +++ linux-2.6/arch/x86/kernel/vmi_32.c
>> @@ -676,6 +676,50 @@ static inline int __init probe_vmi_rom(v
>> return 0;
>> }
>>
>> +#ifdef CONFIG_X86_LOCAL_APIC
>> +static u32 vmi_apic_read(u32 reg)
>> +{
>> + return 0;
>> +}
>> +
>> +static void vmi_apic_write(u32 reg, u32 val)
>> +{
>> + /* Warn to see if there's any stray references */
>> + WARN_ON(1);
>> +}
>> +
>> +static u64 vmi_apic_icr_read(void)
>> +{
>> + return 0;
>> +}
>> +
>> +static void vmi_apic_icr_write(u32 low, u32 id)
>> +{
>> + /* Warn to see if there's any stray references */
>> + WARN_ON(1);
>> +}
>> +
>> +static void vmi_apic_wait_icr_idle(void)
>> +{
>> + return;
>> +}
>> +
>> +static u32 vmi_safe_apic_wait_icr_idle(void)
>> +{
>> + return 0;
>> +}
>> +
>> +static struct apic_ops vmi_basic_apic_ops = {
>> + .read = vmi_apic_read,
>> + .write = vmi_apic_write,
>> + .write_atomic = vmi_apic_write,
>> + .icr_read = vmi_apic_icr_read,
>> + .icr_write = vmi_apic_icr_write,
>> + .wait_icr_idle = vmi_apic_wait_icr_idle,
>> + .safe_wait_icr_idle = vmi_safe_apic_wait_icr_idle,
>> +};
>> +#endif
>> +
>> /*
>> * VMI setup common to all processors
>> */
>> @@ -904,9 +948,10 @@ static inline int __init activate_vmi(vo
>> #endif
>>
>> #ifdef CONFIG_X86_LOCAL_APIC
>> - para_fill(pv_apic_ops.apic_read, APICRead);
>> - para_fill(pv_apic_ops.apic_write, APICWrite);
>> - para_fill(pv_apic_ops.apic_write_atomic, APICWrite);
>> + para_fill(vmi_basic_apic_ops.read, APICRead);
>> + para_fill(vmi_basic_apic_ops.write, APICWrite);
>> + para_fill(vmi_basic_apic_ops.write_atomic, APICWrite);
>> + apic_ops = &vmi_basic_apic_ops;
>
> Yinghai, Looking more closely at this, based on my understanding this might be
> wrong for VMI. Correct patch should be as follows. Any comments?

so you mean icr related will still use default native member?

YH


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