[PATCH v10 06/26] virt: gunyah: msgq: Add hypercalls to send and receive messages
From: Elliot Berman <hidden>
Date: 2023-02-14 21:23:35
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 | 32 ++++++++++++++++++++++++++++ include/linux/gunyah.h | 7 ++++++ 2 files changed, 39 insertions(+)
diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c
index f30d06ee80cf..2ca9ab098ff6 100644
--- a/arch/arm64/gunyah/gunyah_hypercall.c
+++ b/arch/arm64/gunyah/gunyah_hypercall.c@@ -38,6 +38,8 @@ EXPORT_SYMBOL_GPL(arch_is_gunyah_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
@@ -57,5 +59,35 @@ 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, 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 == 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, 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 == 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 3fef2854c5e1..cb6df4eec5c2 100644
--- a/include/linux/gunyah.h
+++ b/include/linux/gunyah.h@@ -112,4 +112,11 @@ 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) + +enum gh_error gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, + bool *ready); +enum gh_error gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, + bool *ready); + #endif
--
2.39.1
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