[PATCH 1/3] x86: Add UV watchlist bios call - Kernel

This is a discussion on [PATCH 1/3] x86: Add UV watchlist bios call - Kernel ; Add UV bios calls to allocate and free watchlists. Signed-off-by: Russ Anderson --- arch/x86/kernel/bios_uv.c | 33 +++++++++++++++++++++++++++++++++ include/asm-x86/uv/bios.h | 17 ++++++++++++++++- 2 files changed, 49 insertions(+), 1 deletion(-) Index: linux/arch/x86/kernel/bios_uv.c ================================================== ================= --- linux.orig/arch/x86/kernel/bios_uv.c 2008-10-21 14:55:17.000000000 -0500 +++ linux/arch/x86/kernel/bios_uv.c 2008-10-21 ...

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Thread: [PATCH 1/3] x86: Add UV watchlist bios call

  1. [PATCH 1/3] x86: Add UV watchlist bios call

    Add UV bios calls to allocate and free watchlists.

    Signed-off-by: Russ Anderson

    ---
    arch/x86/kernel/bios_uv.c | 33 +++++++++++++++++++++++++++++++++
    include/asm-x86/uv/bios.h | 17 ++++++++++++++++-
    2 files changed, 49 insertions(+), 1 deletion(-)

    Index: linux/arch/x86/kernel/bios_uv.c
    ================================================== =================
    --- linux.orig/arch/x86/kernel/bios_uv.c 2008-10-21 14:55:17.000000000 -0500
    +++ linux/arch/x86/kernel/bios_uv.c 2008-10-21 14:55:18.000000000 -0500
    @@ -100,6 +100,39 @@ s64 uv_bios_get_sn_info(int fc, int *uvt
    return ret;
    }

    +int
    +uv_bios_mq_watchlist_alloc(int blade, void *mq, unsigned int mq_size,
    + unsigned long *intr_mmr_offset)
    +{
    + union uv_watchlist_u size_blade;
    + unsigned long addr;
    + u64 watchlist;
    + s64 ret;
    +
    + addr = (unsigned long)mq;
    + size_blade.size = mq_size;
    + size_blade.blade = blade;
    +
    + /*
    + * bios returns watchlist number or negative error number.
    + */
    + ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
    + size_blade.val, (u64)intr_mmr_offset,
    + (u64)&watchlist, 0);
    + if (ret < BIOS_STATUS_SUCCESS)
    + return ret;
    +
    + return watchlist;
    +}
    +EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
    +
    +int
    +uv_bios_mq_watchlist_free(int blade, int watchlist_num)
    +{
    + return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
    + blade, watchlist_num, 0, 0, 0);
    +}
    +EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);

    s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
    {
    Index: linux/include/asm-x86/uv/bios.h
    ================================================== =================
    --- linux.orig/include/asm-x86/uv/bios.h 2008-10-21 14:55:17.000000000 -0500
    +++ linux/include/asm-x86/uv/bios.h 2008-10-21 14:55:18.000000000 -0500
    @@ -32,7 +32,9 @@
    enum uv_bios_cmd {
    UV_BIOS_COMMON,
    UV_BIOS_GET_SN_INFO,
    - UV_BIOS_FREQ_BASE
    + UV_BIOS_FREQ_BASE,
    + UV_BIOS_WATCHLIST_ALLOC,
    + UV_BIOS_WATCHLIST_FREE
    };

    /*
    @@ -71,6 +73,15 @@ union partition_info_u {
    };
    };

    +union uv_watchlist_u {
    + u64 val;
    + struct {
    + u64 blade : 16,
    + size : 32,
    + filler : 16;
    + };
    +};
    +
    /*
    * bios calls have 6 parameters
    */
    @@ -80,9 +91,13 @@ extern s64 uv_bios_call_reentrant(enum u

    extern s64 uv_bios_get_sn_info(int, int *, long *, long *, long *);
    extern s64 uv_bios_freq_base(u64, u64 *);
    +extern int uv_bios_mq_watchlist_alloc(int, void *, unsigned int,
    + unsigned long *);
    +extern int uv_bios_mq_watchlist_free(int, int);

    extern void uv_bios_init(void);

    +extern unsigned long sn_rtc_cycles_per_second;
    extern int uv_type;
    extern long sn_partition_id;
    extern long sn_coherency_id;
    --
    Russ Anderson, OS RAS/Partitioning Project Lead
    SGI - Silicon Graphics Inc rja@sgi.com
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  2. Re: [PATCH 1/3] x86: Add UV watchlist bios call


    * Russ Anderson wrote:

    > Add UV bios calls to allocate and free watchlists.


    hm, what is a watchlist?

    Ingo
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  3. Re: [PATCH 1/3] x86: Add UV watchlist bios call

    On Wed, Oct 22, 2008 at 08:20:43AM +0200, Ingo Molnar wrote:
    >
    > * Russ Anderson wrote:
    >
    > > Add UV bios calls to allocate and free watchlists.

    >
    > hm, what is a watchlist?


    It is a hardware feature in the SGI UV hardware, used as part
    of the GRU message queue support.

    It is used by drivers/misc/sgi-xp/xpc_uv.c. Dean Nelson submitted
    a patch yesterday that uses the watchlist bios call.

    http://marc.info/?l=linux-kernel&m=122462426019304&w=2

    Thanks,
    --
    Russ Anderson, OS RAS/Partitioning Project Lead
    SGI - Silicon Graphics Inc rja@sgi.com
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