| Message ID | 1463906739-934-11-git-send-email-bmeng.cn@gmail.com |
|---|---|
| State | Accepted |
| Commit | 911d6f693292dbf9b54de43f18ac95427e9accd8 |
| Delegated to: | Bin Meng |
| Headers | show |
On 22 May 2016 at 02:45, Bin Meng <bmeng.cn@gmail.com> wrote: > After power-on, both LAPIC and I/O APIC appear with the same APIC ID > zero, which creates an ID conflict. When generating MP table, U-Boot > reports zero as the LAPIC ID in the processor entry, and zero as the > I/O APIC ID in the I/O APIC as well as the I/O interrupt assignment > entries. Such MP table confuses Linux kernel and finally a kernel > panic is seen during boot: > > BUG: unable to handle kernel paging request at ffff9000 > IP: [<c101d462>] native_io_apic_write+0x22/0x30 > *pdpt = 00000000014fb001 *pde = 00000000014ff067 *pte = 0000000000000000 > Oops: 0002 [#1] > Modules linked in: > Pid: 1, comm: swapper Tainted: G W 3.8.7 #3 intel galileo/galileo > EIP: 0060:[<c101d462>] EFLAGS: 00010086 CPU: 0 > EIP is at native_io_apic_write+0x22/0x30 > ... > Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 > > Signed-off-by: Bin Meng <bmeng.cn@gmail.com> > --- > > arch/x86/cpu/quark/quark.c | 4 ++++ > 1 file changed, 4 insertions(+) Reviewed-by: Simon Glass <sjg@chromium.org>
On Mon, May 23, 2016 at 8:19 AM, Simon Glass <sjg@chromium.org> wrote: > On 22 May 2016 at 02:45, Bin Meng <bmeng.cn@gmail.com> wrote: >> After power-on, both LAPIC and I/O APIC appear with the same APIC ID >> zero, which creates an ID conflict. When generating MP table, U-Boot >> reports zero as the LAPIC ID in the processor entry, and zero as the >> I/O APIC ID in the I/O APIC as well as the I/O interrupt assignment >> entries. Such MP table confuses Linux kernel and finally a kernel >> panic is seen during boot: >> >> BUG: unable to handle kernel paging request at ffff9000 >> IP: [<c101d462>] native_io_apic_write+0x22/0x30 >> *pdpt = 00000000014fb001 *pde = 00000000014ff067 *pte = 0000000000000000 >> Oops: 0002 [#1] >> Modules linked in: >> Pid: 1, comm: swapper Tainted: G W 3.8.7 #3 intel galileo/galileo >> EIP: 0060:[<c101d462>] EFLAGS: 00010086 CPU: 0 >> EIP is at native_io_apic_write+0x22/0x30 >> ... >> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 >> >> Signed-off-by: Bin Meng <bmeng.cn@gmail.com> >> --- >> >> arch/x86/cpu/quark/quark.c | 4 ++++ >> 1 file changed, 4 insertions(+) > > Reviewed-by: Simon Glass <sjg@chromium.org> applied to u-boot-x86, thanks!
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c index cf3fe7f..bdd360a 100644 --- a/arch/x86/cpu/quark/quark.c +++ b/arch/x86/cpu/quark/quark.c @@ -7,6 +7,7 @@ #include <common.h> #include <mmc.h> #include <asm/io.h> +#include <asm/ioapic.h> #include <asm/mrccache.h> #include <asm/mtrr.h> #include <asm/pci.h> @@ -338,6 +339,9 @@ int arch_misc_init(void) mrccache_save(); #endif + /* Assign a unique I/O APIC ID */ + io_apic_set_id(1); + return 0; }
After power-on, both LAPIC and I/O APIC appear with the same APIC ID zero, which creates an ID conflict. When generating MP table, U-Boot reports zero as the LAPIC ID in the processor entry, and zero as the I/O APIC ID in the I/O APIC as well as the I/O interrupt assignment entries. Such MP table confuses Linux kernel and finally a kernel panic is seen during boot: BUG: unable to handle kernel paging request at ffff9000 IP: [<c101d462>] native_io_apic_write+0x22/0x30 *pdpt = 00000000014fb001 *pde = 00000000014ff067 *pte = 0000000000000000 Oops: 0002 [#1] Modules linked in: Pid: 1, comm: swapper Tainted: G W 3.8.7 #3 intel galileo/galileo EIP: 0060:[<c101d462>] EFLAGS: 00010086 CPU: 0 EIP is at native_io_apic_write+0x22/0x30 ... Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 Signed-off-by: Bin Meng <bmeng.cn@gmail.com> --- arch/x86/cpu/quark/quark.c | 4 ++++ 1 file changed, 4 insertions(+)