diff options
Diffstat (limited to 'arch/powerpc/sysdev/xive/spapr.c')
| -rw-r--r-- | arch/powerpc/sysdev/xive/spapr.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index 0fcae7504353..43e9eeb0d39f 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -224,7 +224,46 @@ static long plpar_int_sync(unsigned long flags, unsigned long lisn) return 0; } -#define XIVE_SRC_H_INT_ESB (1ull << (63 - 60)) /* TODO */ +#define XIVE_ESB_FLAG_STORE (1ull << (63 - 63)) + +static long plpar_int_esb(unsigned long flags, + unsigned long lisn, + unsigned long offset, + unsigned long in_data, + unsigned long *out_data) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + pr_devel("H_INT_ESB flags=%lx lisn=%lx offset=%lx in=%lx\n", + flags, lisn, offset, in_data); + + rc = plpar_hcall(H_INT_ESB, retbuf, flags, lisn, offset, in_data); + if (rc) { + pr_err("H_INT_ESB lisn=%ld offset=%ld returned %ld\n", + lisn, offset, rc); + return rc; + } + + *out_data = retbuf[0]; + + return 0; +} + +static u64 xive_spapr_esb_rw(u32 lisn, u32 offset, u64 data, bool write) +{ + unsigned long read_data; + long rc; + + rc = plpar_int_esb(write ? XIVE_ESB_FLAG_STORE : 0, + lisn, offset, data, &read_data); + if (rc) + return -1; + + return write ? 0 : read_data; +} + +#define XIVE_SRC_H_INT_ESB (1ull << (63 - 60)) #define XIVE_SRC_LSI (1ull << (63 - 61)) #define XIVE_SRC_TRIGGER (1ull << (63 - 62)) #define XIVE_SRC_STORE_EOI (1ull << (63 - 63)) @@ -244,6 +283,8 @@ static int xive_spapr_populate_irq_data(u32 hw_irq, struct xive_irq_data *data) if (rc) return -EINVAL; + if (flags & XIVE_SRC_H_INT_ESB) + data->flags |= XIVE_IRQ_FLAG_H_INT_ESB; if (flags & XIVE_SRC_STORE_EOI) data->flags |= XIVE_IRQ_FLAG_STORE_EOI; if (flags & XIVE_SRC_LSI) @@ -487,6 +528,7 @@ static const struct xive_ops xive_spapr_ops = { .setup_cpu = xive_spapr_setup_cpu, .teardown_cpu = xive_spapr_teardown_cpu, .sync_source = xive_spapr_sync_source, + .esb_rw = xive_spapr_esb_rw, #ifdef CONFIG_SMP .get_ipi = xive_spapr_get_ipi, .put_ipi = xive_spapr_put_ipi, |