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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: [Xen-changelog] [xen-3.4-testing] x86: Generalise BUGFRAME_dump mechanism to allow polled UART irq to
Builds for me! :-)
K.
On 24/02/2010 13:25, "Mark Johnson" <johnson.nh@xxxxxxxxx> wrote:
> FYI, I see the following build error with this patch...
>
> MRJ
>
>
> ---- new warnings/errors for xen ----
> keyhandler.c: In function `__dump_execstate':
> keyhandler.c:96: warning: asm operand 1 probably doesn't match constraints
> gmake[5]: *** [keyhandler.o] Error 1
> gmake[4]: *** [/tank/ws/xvm-3.4.3/xen.hg/xen/common/built_in.o] Error 2
> gmake[3]: *** [/tank/ws/xvm-3.4.3/xen.hg/xen/xen] Error 2
>
>
> static void __dump_execstate(void *unused)
> {
> dump_execution_state(); <==== keyhandler.c:96
>
>
>> +#define dump_execution_state()
>> run_in_exception_handler(show_execution_state)
>
>> +#define run_in_exception_handler(fn) \
>> asm volatile ( \
>> - "ud2 ; ret $0" \
>> - : : "i" (BUGFRAME_dump) )
>> + "ud2 ; ret %0" BUG_STR(1) \
>> + : : "i" (BUGFRAME_run_fn), \
>> + "i" (fn) )
>>
>
>
>
>
> On Wed, Feb 24, 2010 at 6:20 AM, Xen patchbot-3.4-testing
> <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx> wrote:
>> # HG changeset patch
>> # User Keir Fraser <keir.fraser@xxxxxxxxxx>
>> # Date 1267009865 0
>> # Node ID 3ccf3e993d5ddc4e5dff15e464dc63d5485e984c
>> # Parent cddd503fb25401fdaabe1344fdf5e060ca158e7a
>> x86: Generalise BUGFRAME_dump mechanism to allow polled UART irq to
>> get proper regs argument.
>>
>> Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
>> xen-unstable changeset: 20969:8cb6e7eff2ba
>> xen-unstable date: Wed Feb 24 10:44:30 2010 +0000
>> ---
>> xen/arch/x86/traps.c | 32
>> ++++++++++++++++++--------------
>> xen/drivers/acpi/utilities/utglobal.c | 1 +
>> xen/drivers/char/ns16550.c | 22 +++++++++++++++++-----
>> xen/include/asm-x86/bug.h | 9 +++++----
>> xen/include/asm-x86/processor.h | 1 +
>> 5 files changed, 42 insertions(+), 23 deletions(-)
>>
>> diff -r cddd503fb254 -r 3ccf3e993d5d xen/arch/x86/traps.c
>> --- a/xen/arch/x86/traps.c Wed Feb 24 11:10:09 2010 +0000
>> +++ b/xen/arch/x86/traps.c Wed Feb 24 11:11:05 2010 +0000
>> @@ -840,6 +840,7 @@ asmlinkage void do_invalid_op(struct cpu
>> {
>> struct bug_frame bug;
>> struct bug_frame_str bug_str;
>> + const void *p;
>> const char *filename, *predicate, *eip = (char *)regs->eip;
>> unsigned long fixup;
>> int id, lineno;
>> @@ -860,26 +861,29 @@ asmlinkage void do_invalid_op(struct cpu
>> goto die;
>> eip += sizeof(bug);
>>
>> - id = bug.id & 3;
>> -
>> - if ( id == BUGFRAME_dump )
>> - {
>> - show_execution_state(regs);
>> - regs->eip = (unsigned long)eip;
>> - return;
>> - }
>> -
>> - /* WARN, BUG or ASSERT: decode the filename pointer and line number. */
>> + /* Decode first pointer argument. */
>> if ( !is_kernel(eip) ||
>> __copy_from_user(&bug_str, eip, sizeof(bug_str)) ||
>> (bug_str.mov != 0xbc) )
>> goto die;
>> - filename = bug_str(bug_str, eip);
>> + p = bug_str(bug_str, eip);
>> + if ( !is_kernel(p) )
>> + goto die;
>> eip += sizeof(bug_str);
>>
>> - if ( !is_kernel(filename) )
>> - filename = "<unknown>";
>> - lineno = bug.id >> 2;
>> + id = bug.id & 3;
>> +
>> + if ( id == BUGFRAME_run_fn )
>> + {
>> + const void (*fn)(struct cpu_user_regs *) = p;
>> + (*fn)(regs);
>> + regs->eip = (unsigned long)eip;
>> + return;
>> + }
>> +
>> + /* WARN, BUG or ASSERT: decode the filename pointer and line number. */
>> + filename = p;
>> + lineno = bug.id >> 2;
>>
>> if ( id == BUGFRAME_warn )
>> {
>> diff -r cddd503fb254 -r 3ccf3e993d5d xen/drivers/acpi/utilities/utglobal.c
>> --- a/xen/drivers/acpi/utilities/utglobal.c Wed Feb 24 11:10:09 2010
>> +0000
>> +++ b/xen/drivers/acpi/utilities/utglobal.c Wed Feb 24 11:11:05 2010
>> +0000
>> @@ -45,6 +45,7 @@
>>
>> #include <xen/config.h>
>> #include <xen/lib.h>
>> +#include <asm/processor.h>
>> #include <acpi/acpi.h>
>> #include <acpi/acnamesp.h>
>>
>> diff -r cddd503fb254 -r 3ccf3e993d5d xen/drivers/char/ns16550.c
>> --- a/xen/drivers/char/ns16550.c Wed Feb 24 11:10:09 2010 +0000
>> +++ b/xen/drivers/char/ns16550.c Wed Feb 24 11:11:05 2010 +0000
>> @@ -144,11 +144,13 @@ static void ns16550_interrupt(
>> }
>> }
>>
>> -static void ns16550_poll(void *data)
>> -{
>> - struct serial_port *port = data;
>> - struct ns16550 *uart = port->uart;
>> - struct cpu_user_regs *regs = guest_cpu_user_regs();
>> +/* Safe: ns16550_poll() runs in softirq context so not reentrant on a given
>> CPU. */
>> +static DEFINE_PER_CPU(struct serial_port *, poll_port);
>> +
>> +static void __ns16550_poll(struct cpu_user_regs *regs)
>> +{
>> + struct serial_port *port = this_cpu(poll_port);
>> + struct ns16550 *uart = port->uart;
>>
>> if ( uart->intr_works )
>> return; /* Interrupts work - no more polling */
>> @@ -166,6 +168,16 @@ static void ns16550_poll(void *data)
>> serial_tx_interrupt(port, regs);
>>
>> set_timer(&uart->timer, NOW() + MILLISECS(uart->timeout_ms));
>> +}
>> +
>> +static void ns16550_poll(void *data)
>> +{
>> + this_cpu(poll_port) = data;
>> +#ifdef run_in_exception_handler
>> + run_in_exception_handler(__ns16550_poll);
>> +#else
>> + __ns16550_poll(guest_cpu_user_regs());
>> +#endif
>> }
>>
>> static int ns16550_tx_empty(struct serial_port *port)
>> diff -r cddd503fb254 -r 3ccf3e993d5d xen/include/asm-x86/bug.h
>> --- a/xen/include/asm-x86/bug.h Wed Feb 24 11:10:09 2010 +0000
>> +++ b/xen/include/asm-x86/bug.h Wed Feb 24 11:11:05 2010 +0000
>> @@ -13,15 +13,16 @@ struct bug_frame {
>> unsigned short id; /* BUGFRAME_??? */
>> } __attribute__((packed));
>>
>> -#define BUGFRAME_dump 0
>> +#define BUGFRAME_run_fn 0
>> #define BUGFRAME_warn 1
>> #define BUGFRAME_bug 2
>> #define BUGFRAME_assert 3
>>
>> -#define dump_execution_state() \
>> +#define run_in_exception_handler(fn) \
>> asm volatile ( \
>> - "ud2 ; ret $0" \
>> - : : "i" (BUGFRAME_dump) )
>> + "ud2 ; ret %0" BUG_STR(1) \
>> + : : "i" (BUGFRAME_run_fn), \
>> + "i" (fn) )
>>
>> #define WARN() \
>> asm volatile ( \
>> diff -r cddd503fb254 -r 3ccf3e993d5d xen/include/asm-x86/processor.h
>> --- a/xen/include/asm-x86/processor.h Wed Feb 24 11:10:09 2010 +0000
>> +++ b/xen/include/asm-x86/processor.h Wed Feb 24 11:11:05 2010 +0000
>> @@ -532,6 +532,7 @@ void show_stack_overflow(unsigned int cp
>> void show_stack_overflow(unsigned int cpu, unsigned long esp);
>> void show_registers(struct cpu_user_regs *regs);
>> void show_execution_state(struct cpu_user_regs *regs);
>> +#define dump_execution_state()
>> run_in_exception_handler(show_execution_state)
>> void show_page_walk(unsigned long addr);
>> asmlinkage void fatal_trap(int trapnr, struct cpu_user_regs *regs);
>>
>>
>> _______________________________________________
>> Xen-changelog mailing list
>> Xen-changelog@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-changelog
>>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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