diff options
Diffstat (limited to 'arch/powerpc/include/asm/plpar_wrappers.h')
-rw-r--r-- | arch/powerpc/include/asm/plpar_wrappers.h | 334 |
1 files changed, 329 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h index 4497c8afb573..b3ee44a40c2f 100644 --- a/arch/powerpc/include/asm/plpar_wrappers.h +++ b/arch/powerpc/include/asm/plpar_wrappers.h @@ -6,9 +6,11 @@ #include <linux/string.h> #include <linux/irqflags.h> +#include <linux/delay.h> #include <asm/hvcall.h> #include <asm/paca.h> +#include <asm/lppaca.h> #include <asm/page.h> static inline long poll_pending(void) @@ -28,7 +30,11 @@ static inline void set_cede_latency_hint(u8 latency_hint) static inline long cede_processor(void) { - return plpar_hcall_norets(H_CEDE); + /* + * We cannot call tracepoints inside RCU idle regions which + * means we must not trace H_CEDE. + */ + return plpar_hcall_norets_notrace(H_CEDE); } static inline long extended_cede_processor(unsigned long latency_hint) @@ -39,11 +45,10 @@ static inline long extended_cede_processor(unsigned long latency_hint) set_cede_latency_hint(latency_hint); rc = cede_processor(); -#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG + /* Ensure that H_CEDE returns with IRQs on */ - if (WARN_ON(!(mfmsr() & MSR_EE))) + if (WARN_ON(IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) && !(mfmsr() & MSR_EE))) __hard_irq_enable(); -#endif set_cede_latency_hint(old_latency_hint); @@ -312,7 +317,12 @@ static inline long plpar_set_ciabr(unsigned long ciabr) static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0) { - return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0); + return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR0, dawr0, dawrx0); +} + +static inline long plpar_set_watchpoint1(unsigned long dawr1, unsigned long dawrx1) +{ + return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR1, dawr1, dawrx1); } static inline long plpar_signal_sys_reset(long cpu) @@ -334,6 +344,257 @@ static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p) return rc; } +static inline long plpar_guest_create(unsigned long flags, unsigned long *guest_id) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + unsigned long token; + long rc; + + token = -1UL; + do { + rc = plpar_hcall(H_GUEST_CREATE, retbuf, flags, token); + if (rc == H_SUCCESS) + *guest_id = retbuf[0]; + + if (rc == H_BUSY) { + token = retbuf[0]; + cond_resched(); + } + + if (H_IS_LONG_BUSY(rc)) { + token = retbuf[0]; + msleep(get_longbusy_msecs(rc)); + rc = H_BUSY; + } + + } while (rc == H_BUSY); + + return rc; +} + +static inline long plpar_guest_create_vcpu(unsigned long flags, + unsigned long guest_id, + unsigned long vcpu_id) +{ + long rc; + + do { + rc = plpar_hcall_norets(H_GUEST_CREATE_VCPU, 0, guest_id, vcpu_id); + + if (rc == H_BUSY) + cond_resched(); + + if (H_IS_LONG_BUSY(rc)) { + msleep(get_longbusy_msecs(rc)); + rc = H_BUSY; + } + + } while (rc == H_BUSY); + + return rc; +} + +static inline long plpar_guest_set_state(unsigned long flags, + unsigned long guest_id, + unsigned long vcpu_id, + unsigned long data_buffer, + unsigned long data_size, + unsigned long *failed_index) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + while (true) { + rc = plpar_hcall(H_GUEST_SET_STATE, retbuf, flags, guest_id, + vcpu_id, data_buffer, data_size); + + if (rc == H_BUSY) { + cpu_relax(); + continue; + } + + if (H_IS_LONG_BUSY(rc)) { + mdelay(get_longbusy_msecs(rc)); + continue; + } + + if (rc == H_INVALID_ELEMENT_ID) + *failed_index = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_SIZE) + *failed_index = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_VALUE) + *failed_index = retbuf[0]; + + break; + } + + return rc; +} + +static inline long plpar_guest_get_state(unsigned long flags, + unsigned long guest_id, + unsigned long vcpu_id, + unsigned long data_buffer, + unsigned long data_size, + unsigned long *failed_index) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + while (true) { + rc = plpar_hcall(H_GUEST_GET_STATE, retbuf, flags, guest_id, + vcpu_id, data_buffer, data_size); + + if (rc == H_BUSY) { + cpu_relax(); + continue; + } + + if (H_IS_LONG_BUSY(rc)) { + mdelay(get_longbusy_msecs(rc)); + continue; + } + + if (rc == H_INVALID_ELEMENT_ID) + *failed_index = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_SIZE) + *failed_index = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_VALUE) + *failed_index = retbuf[0]; + + break; + } + + return rc; +} + +static inline long plpar_guest_run_vcpu(unsigned long flags, unsigned long guest_id, + unsigned long vcpu_id, int *trap, + unsigned long *failed_index) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + rc = plpar_hcall(H_GUEST_RUN_VCPU, retbuf, flags, guest_id, vcpu_id); + if (rc == H_SUCCESS) + *trap = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_ID) + *failed_index = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_SIZE) + *failed_index = retbuf[0]; + else if (rc == H_INVALID_ELEMENT_VALUE) + *failed_index = retbuf[0]; + + return rc; +} + +static inline long plpar_guest_delete(unsigned long flags, u64 guest_id) +{ + long rc; + + do { + rc = plpar_hcall_norets(H_GUEST_DELETE, flags, guest_id); + if (rc == H_BUSY) + cond_resched(); + + if (H_IS_LONG_BUSY(rc)) { + msleep(get_longbusy_msecs(rc)); + rc = H_BUSY; + } + + } while (rc == H_BUSY); + + return rc; +} + +static inline long plpar_guest_set_capabilities(unsigned long flags, + unsigned long capabilities) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + do { + rc = plpar_hcall(H_GUEST_SET_CAPABILITIES, retbuf, flags, capabilities); + if (rc == H_BUSY) + cond_resched(); + + if (H_IS_LONG_BUSY(rc)) { + msleep(get_longbusy_msecs(rc)); + rc = H_BUSY; + } + } while (rc == H_BUSY); + + return rc; +} + +static inline long plpar_guest_get_capabilities(unsigned long flags, + unsigned long *capabilities) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + do { + rc = plpar_hcall(H_GUEST_GET_CAPABILITIES, retbuf, flags); + if (rc == H_BUSY) + cond_resched(); + + if (H_IS_LONG_BUSY(rc)) { + msleep(get_longbusy_msecs(rc)); + rc = H_BUSY; + } + } while (rc == H_BUSY); + + if (rc == H_SUCCESS) + *capabilities = retbuf[0]; + + return rc; +} + +/* + * Wrapper to H_RPT_INVALIDATE hcall that handles return values appropriately + * + * - Returns H_SUCCESS on success + * - For H_BUSY return value, we retry the hcall. + * - For any other hcall failures, attempt a full flush once before + * resorting to BUG(). + * + * Note: This hcall is expected to fail only very rarely. The correct + * error recovery of killing the process/guest will be eventually + * needed. + */ +static inline long pseries_rpt_invalidate(u64 pid, u64 target, u64 type, + u64 page_sizes, u64 start, u64 end) +{ + long rc; + unsigned long all; + + while (true) { + rc = plpar_hcall_norets(H_RPT_INVALIDATE, pid, target, type, + page_sizes, start, end); + if (rc == H_BUSY) { + cpu_relax(); + continue; + } else if (rc == H_SUCCESS) + return rc; + + /* Flush request failed, try with a full flush once */ + if (type & H_RPTI_TYPE_NESTED) + all = H_RPTI_TYPE_NESTED | H_RPTI_TYPE_NESTED_ALL; + else + all = H_RPTI_TYPE_ALL; +retry: + rc = plpar_hcall_norets(H_RPT_INVALIDATE, pid, target, + all, page_sizes, 0, -1UL); + if (rc == H_BUSY) { + cpu_relax(); + goto retry; + } else if (rc == H_SUCCESS) + return rc; + + BUG(); + } +} + #else /* !CONFIG_PPC_PSERIES */ static inline long plpar_set_ciabr(unsigned long ciabr) @@ -346,6 +607,69 @@ static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex, { return 0; } + +static inline long pseries_rpt_invalidate(u64 pid, u64 target, u64 type, + u64 page_sizes, u64 start, u64 end) +{ + return 0; +} + +static inline long plpar_guest_create_vcpu(unsigned long flags, + unsigned long guest_id, + unsigned long vcpu_id) +{ + return 0; +} + +static inline long plpar_guest_get_state(unsigned long flags, + unsigned long guest_id, + unsigned long vcpu_id, + unsigned long data_buffer, + unsigned long data_size, + unsigned long *failed_index) +{ + return 0; +} + +static inline long plpar_guest_set_state(unsigned long flags, + unsigned long guest_id, + unsigned long vcpu_id, + unsigned long data_buffer, + unsigned long data_size, + unsigned long *failed_index) +{ + return 0; +} + +static inline long plpar_guest_run_vcpu(unsigned long flags, unsigned long guest_id, + unsigned long vcpu_id, int *trap, + unsigned long *failed_index) +{ + return 0; +} + +static inline long plpar_guest_create(unsigned long flags, unsigned long *guest_id) +{ + return 0; +} + +static inline long plpar_guest_delete(unsigned long flags, u64 guest_id) +{ + return 0; +} + +static inline long plpar_guest_get_capabilities(unsigned long flags, + unsigned long *capabilities) +{ + return 0; +} + +static inline long plpar_guest_set_capabilities(unsigned long flags, + unsigned long capabilities) +{ + return 0; +} + #endif /* CONFIG_PPC_PSERIES */ #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */ |