| Message ID | 20230509204801.2824351-5-quic_eberman@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | Drivers for Gunyah hypervisor | expand |
On 5/9/23 3:47 PM, Elliot Berman wrote: > Add hypercalls to send and receive messages on a Gunyah message queue. > > Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> I continue to dislike the long lines, but aside from that this looks fine. Reviewed-by: Alex Elder <elder@linaro.org> > --- > arch/arm64/gunyah/gunyah_hypercall.c | 31 ++++++++++++++++++++++++++++ > include/linux/gunyah.h | 6 ++++++ > 2 files changed, 37 insertions(+) > > diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c > index 2166d5dab869..2b2a63e9b9e5 100644 > --- a/arch/arm64/gunyah/gunyah_hypercall.c > +++ b/arch/arm64/gunyah/gunyah_hypercall.c > @@ -33,6 +33,8 @@ EXPORT_SYMBOL_GPL(arch_is_gh_guest); > fn) > > #define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x8000) > +#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x801B) > +#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x801C) > > /** > * gh_hypercall_hyp_identify() - Returns build information and feature flags > @@ -52,5 +54,34 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi > } > EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); > > +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready) > +{ > + struct arm_smccc_res res; > + > + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_SEND, capid, size, (uintptr_t)buff, tx_flags, 0, &res); > + > + if (res.a0 == GH_ERROR_OK) > + *ready = !!res.a1; > + > + return res.a0; > +} > +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_send); > + > +enum gh_error gh_hypercall_msgq_recv(u64 capid, void *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, (uintptr_t)buff, size, 0, &res); > + > + if (res.a0 == GH_ERROR_OK) { > + *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 6b36cf4787ef..01a6f202d037 100644 > --- a/include/linux/gunyah.h > +++ b/include/linux/gunyah.h > @@ -111,4 +111,10 @@ static inline u16 gh_api_version(const struct gh_hypercall_hyp_identify_resp *gh > > void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); > > +#define GH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) > + > +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready); > +enum gh_error gh_hypercall_msgq_recv(u64 capid, void *buff, size_t size, size_t *recv_size, > + bool *ready); > + > #endif
On 09/05/2023 21:47, Elliot Berman wrote: > Add hypercalls to send and receive messages on a Gunyah message queue. > > Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> > --- Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> --srini > arch/arm64/gunyah/gunyah_hypercall.c | 31 ++++++++++++++++++++++++++++ > include/linux/gunyah.h | 6 ++++++ > 2 files changed, 37 insertions(+) > > diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c > index 2166d5dab869..2b2a63e9b9e5 100644 > --- a/arch/arm64/gunyah/gunyah_hypercall.c > +++ b/arch/arm64/gunyah/gunyah_hypercall.c > @@ -33,6 +33,8 @@ EXPORT_SYMBOL_GPL(arch_is_gh_guest); > fn) > > #define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x8000) > +#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x801B) > +#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x801C) > > /** > * gh_hypercall_hyp_identify() - Returns build information and feature flags > @@ -52,5 +54,34 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi > } > EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); > > +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready) > +{ > + struct arm_smccc_res res; > + > + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_SEND, capid, size, (uintptr_t)buff, tx_flags, 0, &res); > + > + if (res.a0 == GH_ERROR_OK) > + *ready = !!res.a1; > + > + return res.a0; > +} > +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_send); > + > +enum gh_error gh_hypercall_msgq_recv(u64 capid, void *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, (uintptr_t)buff, size, 0, &res); > + > + if (res.a0 == GH_ERROR_OK) { > + *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 6b36cf4787ef..01a6f202d037 100644 > --- a/include/linux/gunyah.h > +++ b/include/linux/gunyah.h > @@ -111,4 +111,10 @@ static inline u16 gh_api_version(const struct gh_hypercall_hyp_identify_resp *gh > > void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); > > +#define GH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) > + > +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready); > +enum gh_error gh_hypercall_msgq_recv(u64 capid, void *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 2166d5dab869..2b2a63e9b9e5 100644 --- a/arch/arm64/gunyah/gunyah_hypercall.c +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -33,6 +33,8 @@ EXPORT_SYMBOL_GPL(arch_is_gh_guest); fn) #define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x8000) +#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x801B) +#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x801C) /** * gh_hypercall_hyp_identify() - Returns build information and feature flags @@ -52,5 +54,34 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi } EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_SEND, capid, size, (uintptr_t)buff, tx_flags, 0, &res); + + if (res.a0 == GH_ERROR_OK) + *ready = !!res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_send); + +enum gh_error gh_hypercall_msgq_recv(u64 capid, void *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, (uintptr_t)buff, size, 0, &res); + + if (res.a0 == GH_ERROR_OK) { + *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 6b36cf4787ef..01a6f202d037 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -111,4 +111,10 @@ static inline u16 gh_api_version(const struct gh_hypercall_hyp_identify_resp *gh void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); +#define GH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) + +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready); +enum gh_error gh_hypercall_msgq_recv(u64 capid, void *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 | 31 ++++++++++++++++++++++++++++ include/linux/gunyah.h | 6 ++++++ 2 files changed, 37 insertions(+)