[PATCH v5 08/13] virt: gunyah: msgq: Add hypercalls to send and receive messages
From: Elliot Berman <hidden>
Date: 2022-10-11 00:09:47
Also in:
linux-arm-msm, linux-devicetree, linux-doc, lkml
Subsystem:
arm64 port (aarch64 architecture), generic include/asm header files, the rest · Maintainers:
Catalin Marinas, Will Deacon, Arnd Bergmann, Linus Torvalds
Add hypercalls to send and receive messages on a Gunyah message queue. Signed-off-by: Elliot Berman <redacted> --- arch/arm64/gunyah/hypercall.c | 33 +++++++++++++++++++++++++++++++++ include/asm-generic/gunyah.h | 5 +++++ 2 files changed, 38 insertions(+)
diff --git a/arch/arm64/gunyah/hypercall.c b/arch/arm64/gunyah/hypercall.c
index 5b08c9d80de0..042cca31879e 100644
--- a/arch/arm64/gunyah/hypercall.c
+++ b/arch/arm64/gunyah/hypercall.c@@ -26,6 +26,8 @@ | ((fn) & GH_CALL_FUNCTION_NUM_MASK)) #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.
@@ -67,5 +69,36 @@ 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/asm-generic/gunyah.h b/include/asm-generic/gunyah.h
index 8f9d4c649ba8..34c41c8393d0 100644
--- a/include/asm-generic/gunyah.h
+++ b/include/asm-generic/gunyah.h@@ -110,4 +110,9 @@ extern struct gh_hypercall_hyp_identify_resp gunyah_api; void gh_hypercall_get_uid(u32 *uid); 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
--
2.25.1
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