Messages in this thread Patch in this message | | | From | Borislav Petkov <> | Subject | [PATCH -v2 5/6] x86, RAS: Add attributes needed for HW injection | Date | Tue, 16 Oct 2012 16:52:54 +0200 |
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From: Borislav Petkov <borislav.petkov@amd.com>
hw_inject denotes whether we want to do a hardware or a software injection and, in the case of hardware injection, we want to do that on a particular cpu, thus the 'cpu' attribute.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> --- arch/x86/ras/amd/mce-inject.c | 55 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+)
diff --git a/arch/x86/ras/amd/mce-inject.c b/arch/x86/ras/amd/mce-inject.c index c0c811579ce9..b55d69fbd6e3 100644 --- a/arch/x86/ras/amd/mce-inject.c +++ b/arch/x86/ras/amd/mce-inject.c @@ -79,6 +79,59 @@ static int toggle_hw_mce_inject(unsigned int cpu, bool enable) } /* + * HW or SW injection + */ +static int hw_inj_get(void *data, u64 *val) +{ + struct mce *m = (struct mce *)data; + + *val = !!(m->inject_flags & MCJ_EXCEPTION); + + return 0; +} + +static int hw_inj_set(void *data, u64 val) +{ + struct mce *m = (struct mce *)data; + + switch (val) { + case 0: + m->inject_flags &= (u8)~MCJ_EXCEPTION; + break; + + case 1: + m->inject_flags |= MCJ_EXCEPTION; + break; + + default: + pr_err("%s: Only 0 or 1 allowed!\n", __func__); + return -EINVAL; + } + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(hw_inj_fops, hw_inj_get, hw_inj_set, "%llu\n"); + +/* + * On which CPU to inject? + */ +MCE_INJECT_GET(extcpu); + +static int inj_extcpu_set(void *data, u64 val) +{ + struct mce *m = (struct mce *)data; + + if (val >= nr_cpu_ids || !cpu_online(val)) { + pr_err("%s: Invalid CPU: %llu\n", __func__, val); + return -EINVAL; + } + m->extcpu = val; + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(extcpu_fops, inj_extcpu_get, inj_extcpu_set, "%llu\n"); + +/* * This denotes into which bank we're injecting and triggers * the injection, at the same time. */ @@ -119,6 +172,8 @@ struct dfs_node { { .name = "misc", .fops = &misc_fops }, { .name = "addr", .fops = &addr_fops }, { .name = "bank", .fops = &bank_fops }, + { .name = "hw_inject", .fops = &hw_inj_fops }, + { .name = "cpu", .fops = &extcpu_fops }, }; static int __init init_mce_inject(void) -- 1.8.0.rc2.4.g42e55a5
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