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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Gunyah doorbells allow two virtual machines to signal each other using interrupts. Add the hypercalls needed to assert the interrupt. Signed-off-by: Elliot Berman --- arch/arm64/gunyah/gunyah_hypercall.c | 39 ++++++++++++++++++---------- include/linux/gunyah.h | 3 +++ 2 files changed, 29 insertions(+), 13 deletions(-) diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c index 17d87a130a3e..057e127f2b4d 100644 --- a/arch/arm64/gunyah/gunyah_hypercall.c +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -12,19 +12,7 @@ static const uint32_t gunyah_known_uuids[][4] = { {0x673d5f14, 0x9265ce36, 0xa4535fdb, 0xc1d58fcd}, /* GUNYAH (open source build) */ }; -#define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x0000) -#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x001B) -#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x001C) -#define GH_HYPERCALL_VCPU_RUN GH_HYPERCALL(0x0065) - -/** - * gh_hypercall_get_uid() - Returns a UID when running under a Gunyah hypervisor - * @uid: An array of 4 u32's (u32 uid[4];) - * - * Caller should compare the resulting UID to a list of known Gunyah UIDs to - * confirm that Linux is running as a guest of Gunyah. - */ -void gh_hypercall_get_uid(u32 uid[4]) +bool arch_is_gunyah_guest(void) { struct arm_smccc_res res; u32 uid[4]; @@ -74,6 +62,31 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi } EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); +int gh_hypercall_dbl_send(u64 capid, u64 new_flags, u64 *old_flags) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_DBL_SEND, capid, new_flags, 0, &res); + + if (res.a0) + return res.a0; + + *old_flags = res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_dbl_send); + +int gh_hypercall_dbl_set_mask(u64 capid, u64 enable_mask, u64 ack_mask) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_DBL_SET_MASK, capid, enable_mask, ack_mask, 0, &res); + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_dbl_set_mask); + int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready) { struct arm_smccc_res res; diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index feeab01bff30..ac4879940c10 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -164,6 +164,9 @@ struct gh_hypercall_hyp_identify_resp { void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); +int gh_hypercall_dbl_send(u64 capid, u64 new_flags, u64 *old_flags); +int gh_hypercall_dbl_set_mask(u64 capid, u64 enable_mask, u64 ack_mask); + #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); -- 2.39.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel