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powerpc/xics: Reset the CPPR if H_EOI fails

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I have an intermittent kdump fail where the hypervisor fails an H_EOI.
As a result our CPPR is never reset to 0xff and we no longer accept
interrupts.

This patch calls icp_hv_set_cppr to reset the CPPR if H_EOI fails,
fixing the kdump fail.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2011-11-30 00:23:15 +00:00 • committed by Benjamin Herrenschmidt
parent a934904d8a
commit 90e8f57cf8
1 changed files with 11 additions and 10 deletions
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21
arch/powerpc/sysdev/xics/icp-hv.c
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@ -41,16 +41,6 @@ static inline unsigned int icp_hv_get_xirr(unsigned char cppr)
return ret; return ret;
} }
static inline void icp_hv_set_xirr(unsigned int value)
{
long rc = plpar_hcall_norets(H_EOI, value);
if (rc != H_SUCCESS) {
pr_err("%s: bad return code eoi xirr=0x%x returned %ld\n",
__func__, value, rc);
WARN_ON_ONCE(1);
}
}
static inline void icp_hv_set_cppr(u8 value) static inline void icp_hv_set_cppr(u8 value)
{ {
long rc = plpar_hcall_norets(H_CPPR, value); long rc = plpar_hcall_norets(H_CPPR, value);
@ -61,6 +51,17 @@ static inline void icp_hv_set_cppr(u8 value)
} }
} }
static inline void icp_hv_set_xirr(unsigned int value)
{
long rc = plpar_hcall_norets(H_EOI, value);
if (rc != H_SUCCESS) {
pr_err("%s: bad return code eoi xirr=0x%x returned %ld\n",
__func__, value, rc);
WARN_ON_ONCE(1);
icp_hv_set_cppr(value >> 24);
}
}
static inline void icp_hv_set_qirr(int n_cpu , u8 value) static inline void icp_hv_set_qirr(int n_cpu , u8 value)
{ {
int hw_cpu = get_hard_smp_processor_id(n_cpu); int hw_cpu = get_hard_smp_processor_id(n_cpu);