From 650927ef8ab1e9b05b77a3f32ca7adcedaae9306 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sat, 25 Jun 2005 14:57:44 -0700 Subject: [PATCH] kexec: x86: resture apic virtual wire mode on shutdown When coming out of apic mode attempt to set the appropriate apic back into virtual wire mode. This improves on previous versions of this patch by by never setting bot the local apic and the ioapic into veritual wire mode. This code looks at data from the mptable to see if an ioapic has an ExtInt input to make this decision. A future improvement is to figure out which apic or ioapic was in virtual wire mode at boot time and to remember it. That is potentially a more accurate method, of selecting which apic to place in virutal wire mode. Signed-off-by: Eric Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/apic.h | 2 +- include/asm-i386/apicdef.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) (limited to 'include/asm-i386') diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h index 53268cd9306e..6a1b1882285c 100644 --- a/include/asm-i386/apic.h +++ b/include/asm-i386/apic.h @@ -100,7 +100,7 @@ extern void (*wait_timer_tick)(void); extern int get_maxlvt(void); extern void clear_local_APIC(void); extern void connect_bsp_APIC (void); -extern void disconnect_bsp_APIC (void); +extern void disconnect_bsp_APIC (int virt_wire_setup); extern void disable_local_APIC (void); extern void lapic_shutdown (void); extern int verify_local_APIC (void); diff --git a/include/asm-i386/apicdef.h b/include/asm-i386/apicdef.h index 41e8d2d918e0..0fed5e3c699c 100644 --- a/include/asm-i386/apicdef.h +++ b/include/asm-i386/apicdef.h @@ -86,6 +86,7 @@ #define APIC_LVT_REMOTE_IRR (1<<14) #define APIC_INPUT_POLARITY (1<<13) #define APIC_SEND_PENDING (1<<12) +#define APIC_MODE_MASK 0x700 #define GET_APIC_DELIVERY_MODE(x) (((x)>>8)&0x7) #define SET_APIC_DELIVERY_MODE(x,y) (((x)&~0x700)|((y)<<8)) #define APIC_MODE_FIXED 0x0 -- cgit v1.2.3