[PATCH RFC v15 27/30] virt: gunyah: Add hypercalls for sending doorbell
From: Elliot Berman <hidden>
Date: 2023-12-16 00:21:32
Also in:
linux-arm-msm, linux-devicetree, linux-doc, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Gunyah doorbells allow a virtual machine to signal another using interrupts. Add the hypercalls needed to assert the interrupt. Reviewed-by: Alex Elder <redacted> Signed-off-by: Elliot Berman <redacted> --- arch/arm64/gunyah/gunyah_hypercall.c | 26 ++++++++++++++++++++++++++ include/linux/gunyah.h | 5 +++++ 2 files changed, 31 insertions(+)
diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c
index 47926df33876..ec3c92025b0b 100644
--- a/arch/arm64/gunyah/gunyah_hypercall.c
+++ b/arch/arm64/gunyah/gunyah_hypercall.c@@ -37,6 +37,8 @@ EXPORT_SYMBOL_GPL(arch_is_gunyah_guest); /* clang-format off */ #define GUNYAH_HYPERCALL_HYP_IDENTIFY GUNYAH_HYPERCALL(0x8000) +#define GUNYAH_HYPERCALL_BELL_SEND GUNYAH_HYPERCALL(0x8012) +#define GUNYAH_HYPERCALL_BELL_SET_MASK GUNYAH_HYPERCALL(0x8015) #define GUNYAH_HYPERCALL_MSGQ_SEND GUNYAH_HYPERCALL(0x801B) #define GUNYAH_HYPERCALL_MSGQ_RECV GUNYAH_HYPERCALL(0x801C) #define GUNYAH_HYPERCALL_ADDRSPACE_MAP GUNYAH_HYPERCALL(0x802B)
@@ -64,6 +66,30 @@ void gunyah_hypercall_hyp_identify( } EXPORT_SYMBOL_GPL(gunyah_hypercall_hyp_identify); +enum gunyah_error gunyah_hypercall_bell_send(u64 capid, u64 new_flags, u64 *old_flags) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_BELL_SEND, capid, new_flags, 0, &res); + + if (res.a0 == GUNYAH_ERROR_OK && old_flags) + *old_flags = res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gunyah_hypercall_bell_send); + +enum gunyah_error gunyah_hypercall_bell_set_mask(u64 capid, u64 enable_mask, u64 ack_mask) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_BELL_SET_MASK, capid, enable_mask, ack_mask, 0, &res); + + return res.a0; +} +EXPORT_SYMBOL_GPL(gunyah_hypercall_bell_set_mask); + + enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready) {
diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
index ed461acb9e1b..dc37c270290b 100644
--- a/include/linux/gunyah.h
+++ b/include/linux/gunyah.h@@ -144,6 +144,11 @@ gunyah_api_version(const struct gunyah_hypercall_hyp_identify_resp *gunyah_api) void gunyah_hypercall_hyp_identify( struct gunyah_hypercall_hyp_identify_resp *hyp_identity); +enum gunyah_error gunyah_hypercall_bell_send(u64 capid, u64 new_flags, + u64 *old_flags); +enum gunyah_error gunyah_hypercall_bell_set_mask(u64 capid, u64 enable_mask, + u64 ack_mask); + #define GUNYAH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff,
--
2.43.0
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