[PATCH v9 07/27] virt: gunyah: msgq: Add hypercalls to send and receive messages
From: Elliot Berman <hidden>
Date: 2023-01-20 22:48:17
Also in:
linux-arm-msm, linux-devicetree, linux-doc, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Add hypercalls to send and receive messages on a Gunyah message queue. Signed-off-by: Elliot Berman <redacted> --- 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; +} +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
--
2.39.0
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