| Message ID | 20230120224627.4053418-8-quic_eberman@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Drivers for gunyah hypervisor | expand |
On 20/01/2023 22:46, Elliot Berman wrote: > Add hypercalls to send and receive messages on a Gunyah message queue. > > Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> > --- > arch/arm64/gunyah/gunyah_hypercall.c | 33 ++++++++++++++++++++++++++++ > include/linux/gunyah.h | 5 +++++ > 2 files changed, 38 insertions(+) > > diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c > index ffed4b71641f..d93ad2c08479 100644 > --- a/arch/arm64/gunyah/gunyah_hypercall.c > +++ b/arch/arm64/gunyah/gunyah_hypercall.c > @@ -13,6 +13,8 @@ static const uint32_t gunyah_known_uuids[][4] = { > }; > > #define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x0000) > +#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x001B) > +#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x001C) > > /** > * gh_hypercall_get_uid() - Returns a UID when running under a Gunyah hypervisor > @@ -71,5 +73,36 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi > } > EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); > > +int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready) > +{ > + struct arm_smccc_res res; > + > + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_SEND, capid, size, buff, tx_flags, 0, &res); > + <-- > + if (res.a0) > + return res.a0; > + > + *ready = res.a1; > + > + return res.a0; --> this can be made more readable with code something like: if (res.a0 == SMCCC_RET_SUCCESS) *ready = res.a1; return res.a0; > +} > +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_send); > + > +int gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, bool *ready) > +{ > + struct arm_smccc_res res; > + > + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_RECV, capid, buff, size, 0, &res); > + > + if (res.a0) > + return res.a0; > + > + *recv_size = res.a1; > + *ready = res.a2; > + same comment. > + return res.a0; > +} > +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_recv); > + > MODULE_LICENSE("GPL"); > MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls"); > diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h > index 6724d1264d58..b5f61c14ec1e 100644 > --- a/include/linux/gunyah.h > +++ b/include/linux/gunyah.h > @@ -104,4 +104,9 @@ struct gh_hypercall_hyp_identify_resp { > > void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); > > +#define GH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) Please move unrelated changes from this patch to the patch that actually uses these. > + > +int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready); > +int gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, bool *ready); > + > #endif
diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c index ffed4b71641f..d93ad2c08479 100644 --- a/arch/arm64/gunyah/gunyah_hypercall.c +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -13,6 +13,8 @@ static const uint32_t gunyah_known_uuids[][4] = { }; #define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x0000) +#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x001B) +#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x001C) /** * gh_hypercall_get_uid() - Returns a UID when running under a Gunyah hypervisor @@ -71,5 +73,36 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi } EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); +int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_SEND, capid, size, buff, tx_flags, 0, &res); + + if (res.a0) + return res.a0; + + *ready = res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_send); + +int gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_RECV, capid, buff, size, 0, &res); + + if (res.a0) + return res.a0; + + *recv_size = res.a1; + *ready = res.a2; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_recv); + MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls"); diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index 6724d1264d58..b5f61c14ec1e 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -104,4 +104,9 @@ struct gh_hypercall_hyp_identify_resp { void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); +#define GH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) + +int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready); +int gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, bool *ready); + #endif
Add hypercalls to send and receive messages on a Gunyah message queue. Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> --- arch/arm64/gunyah/gunyah_hypercall.c | 33 ++++++++++++++++++++++++++++ include/linux/gunyah.h | 5 +++++ 2 files changed, 38 insertions(+)