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FROMLIST: virt: gunyah: msgq: Add hypercalls to send and receive messages

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Add hypercalls to send and receive messages on a Gunyah message queue.

Change-Id: I4ee7893c4ce76ea273fa4db7c43c345905f87ed0
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
Bug: 268234781
Link: https://lore.kernel.org/all/20230304010632.2127470-7-quic_eberman@quicinc.com/
This commit is contained in:
Elliot Berman
2022-08-26 12:10:59 -07:00
committed by Aleksei Vetrov
parent cc7db24050
commit 5943689fc3
2 changed files with 37 additions and 0 deletions
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31
arch/arm64/gunyah/gunyah_hypercall.c
View File

@@ -41,6 +41,8 @@ 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
@@ -60,5 +62,34 @@ 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, int 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");

6
include/linux/gunyah.h
View File

@@ -108,4 +108,10 @@ 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, void *buff, int 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