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author | Jan Beulich <jbeulich@suse.com> | 2013-03-07 18:01:13 +0100 |
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committer | Jan Beulich <jbeulich@suse.com> | 2013-03-07 18:01:13 +0100 |
commit | 22c2216d90d830893ed22598483142c5d0307691 (patch) | |
tree | 39fa7b787ade47c17d9a2eb08991aa6b5f05bd29 | |
parent | b01bf1a548b00cb64a9012648ceca017b740c941 (diff) | |
download | xen-22c2216d90d830893ed22598483142c5d0307691.tar.gz xen-22c2216d90d830893ed22598483142c5d0307691.tar.bz2 xen-22c2216d90d830893ed22598483142c5d0307691.zip |
x86: fix CMCI injection
This fixes the wrong use of literal vector 0xF7 with an "int"
instruction (invalidated by 25113:14609be41f36) and the fact that doing
the injection via a software interrupt was never valid anyway (because
cmci_interrupt() acks the LAPIC, which does the wrong thing if the
interrupt didn't get delivered though it).
In order to do latter, the patch introduces send_IPI_self(), at once
removing two opend coded uses of "genapic" in the IRQ handling code.
Reported-by: Yongjie Ren <yongjie.ren@intel.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Tested-by: Yongjie Ren <yongjie.ren@intel.com>
Acked-by: Keir Fraser <keir@xen.org>
master changeset: 2f8c55ccefe49bb526df0eaf5fa9b7b788422208
master date: 2013-02-26 10:15:56 +0100
-rw-r--r-- | xen/arch/x86/cpu/mcheck/mce.c | 15 | ||||
-rw-r--r-- | xen/arch/x86/cpu/mcheck/mce.h | 2 | ||||
-rw-r--r-- | xen/arch/x86/cpu/mcheck/mce_intel.c | 1 | ||||
-rw-r--r-- | xen/arch/x86/irq.c | 4 | ||||
-rw-r--r-- | xen/arch/x86/smp.c | 5 | ||||
-rw-r--r-- | xen/include/asm-x86/smp.h | 3 |
6 files changed, 18 insertions, 12 deletions
diff --git a/xen/arch/x86/cpu/mcheck/mce.c b/xen/arch/x86/cpu/mcheck/mce.c index a89df6d157..c8363203f2 100644 --- a/xen/arch/x86/cpu/mcheck/mce.c +++ b/xen/arch/x86/cpu/mcheck/mce.c @@ -30,6 +30,7 @@ bool_t __read_mostly mce_broadcast = 0; bool_t is_mc_panic; unsigned int __read_mostly nr_mce_banks; unsigned int __read_mostly firstbank; +uint8_t __read_mostly cmci_apic_vector; static void intpose_init(void); static void mcinfo_clear(struct mc_info *); @@ -1277,12 +1278,6 @@ static void x86_mc_mceinject(void *data) __asm__ __volatile__("int $0x12"); } -static void x86_cmci_inject(void *data) -{ - printk("Simulating CMCI on cpu %d\n", smp_processor_id()); - __asm__ __volatile__("int $0xf7"); -} - #if BITS_PER_LONG == 64 #define ID2COOKIE(id) ((mctelem_cookie_t)(id)) @@ -1568,11 +1563,15 @@ long do_mca(XEN_GUEST_HANDLE(xen_mc_t) u_xen_mc) on_selected_cpus(cpumap, x86_mc_mceinject, NULL, 1); break; case XEN_MC_INJECT_TYPE_CMCI: - if ( !cmci_support ) + if ( !cmci_apic_vector ) ret = x86_mcerr( "No CMCI supported in platform\n", -EINVAL); else - on_selected_cpus(cpumap, x86_cmci_inject, NULL, 1); + { + if ( cpumask_test_cpu(smp_processor_id(), cpumap) ) + send_IPI_self(cmci_apic_vector); + send_IPI_mask(cpumap, cmci_apic_vector); + } break; default: ret = x86_mcerr("Wrong mca type\n", -EINVAL); diff --git a/xen/arch/x86/cpu/mcheck/mce.h b/xen/arch/x86/cpu/mcheck/mce.h index 61fa7ee04a..3c773c7450 100644 --- a/xen/arch/x86/cpu/mcheck/mce.h +++ b/xen/arch/x86/cpu/mcheck/mce.h @@ -38,6 +38,8 @@ enum mcheck_type { mcheck_intel }; +extern uint8_t cmci_apic_vector; + /* Init functions */ enum mcheck_type amd_k7_mcheck_init(struct cpuinfo_x86 *c); enum mcheck_type amd_k8_mcheck_init(struct cpuinfo_x86 *c); diff --git a/xen/arch/x86/cpu/mcheck/mce_intel.c b/xen/arch/x86/cpu/mcheck/mce_intel.c index a5f0130be7..02e2db57d4 100644 --- a/xen/arch/x86/cpu/mcheck/mce_intel.c +++ b/xen/arch/x86/cpu/mcheck/mce_intel.c @@ -1164,7 +1164,6 @@ static void intel_init_cmci(struct cpuinfo_x86 *c) { u32 l, apic; int cpu = smp_processor_id(); - static uint8_t cmci_apic_vector; if (!mce_available(c) || !cmci_support) { if (opt_cpu_info) diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c index affa9422ff..0964c762fd 100644 --- a/xen/arch/x86/irq.c +++ b/xen/arch/x86/irq.c @@ -646,7 +646,7 @@ void irq_move_cleanup_interrupt(struct cpu_user_regs *regs) * to myself. */ if (irr & (1 << (vector % 32))) { - genapic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR); + send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR); TRACE_3D(TRC_HW_IRQ_MOVE_CLEANUP_DELAY, irq, vector, smp_processor_id()); goto unlock; @@ -692,7 +692,7 @@ static void send_cleanup_vector(struct irq_desc *desc) cpumask_and(&cleanup_mask, desc->arch.old_cpu_mask, &cpu_online_map); desc->arch.move_cleanup_count = cpumask_weight(&cleanup_mask); - genapic->send_IPI_mask(&cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); + send_IPI_mask(&cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); desc->arch.move_in_progress = 0; } diff --git a/xen/arch/x86/smp.c b/xen/arch/x86/smp.c index 814547bb6a..5ca0330a4e 100644 --- a/xen/arch/x86/smp.c +++ b/xen/arch/x86/smp.c @@ -43,6 +43,11 @@ void send_IPI_mask(const cpumask_t *mask, int vector) genapic->send_IPI_mask(mask, vector); } +void send_IPI_self(int vector) +{ + genapic->send_IPI_self(vector); +} + /* * Some notes on x86 processor bugs affecting SMP operation: * diff --git a/xen/include/asm-x86/smp.h b/xen/include/asm-x86/smp.h index 8d5e7147b8..3aa31d3362 100644 --- a/xen/include/asm-x86/smp.h +++ b/xen/include/asm-x86/smp.h @@ -29,7 +29,8 @@ DECLARE_PER_CPU(cpumask_var_t, cpu_core_mask); void smp_send_nmi_allbutself(void); -void send_IPI_mask(const cpumask_t *mask, int vector); +void send_IPI_mask(const cpumask_t *, int vector); +void send_IPI_self(int vector); extern void (*mtrr_hook) (void); |