linux-kernel - [PATCH 03/18] hyperv-tlfs: Update struct hv_send_ipi{

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Message-ID: <20240609154945.55332-4-nsaenz@amazon.com>
Date: Sun, 9 Jun 2024 15:49:31 +0000
From: Nicolas Saenz Julienne <nsaenz@...zon.com>
To: <linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>
CC: <pbonzini@...hat.com>, <seanjc@...gle.com>, <vkuznets@...hat.com>,
	<linux-doc@...r.kernel.org>, <linux-hyperv@...r.kernel.org>,
	<linux-arch@...r.kernel.org>, <linux-trace-kernel@...r.kernel.org>,
	<graf@...zon.de>, <dwmw2@...radead.org>, <paul@...zon.com>,
	<nsaenz@...zon.com>, <mlevitsk@...hat.com>, <jgowans@...zon.com>,
	<corbet@....net>, <decui@...rosoft.com>, <tglx@...utronix.de>,
	<mingo@...hat.com>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>,
	<x86@...nel.org>, <amoorthy@...gle.com>
Subject: [PATCH 03/18] hyperv-tlfs: Update struct hv_send_ipi{_ex}'s declarations

Both 'struct hv_send_ipi' and 'struct hv_send_ipi_ex' have an 'union
hv_input_vtl' parameter which has been ignored until now. Expose it, as
KVM will soon provide a way of dealing with VTL-aware IPIs. While doing
Also fixup __send_ipi_mask_ex().

Signed-off-by: Nicolas Saenz Julienne <nsaenz@...zon.com>
---
 arch/x86/hyperv/hv_apic.c         | 3 +--
 include/asm-generic/hyperv-tlfs.h | 6 ++++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c
index 0569f579338b5..97907371d51ef 100644
--- a/arch/x86/hyperv/hv_apic.c
+++ b/arch/x86/hyperv/hv_apic.c
@@ -121,9 +121,8 @@ static bool __send_ipi_mask_ex(const struct cpumask *mask, int vector,
 	if (unlikely(!ipi_arg))
 		goto ipi_mask_ex_done;
 
+	memset(ipi_arg, 0, sizeof(*ipi_arg));
 	ipi_arg->vector = vector;
-	ipi_arg->reserved = 0;
-	ipi_arg->vp_set.valid_bank_mask = 0;
 
 	/*
 	 * Use HV_GENERIC_SET_ALL and avoid converting cpumask to VP_SET
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index ffac04bbd0c19..28cde641b5474 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -425,14 +425,16 @@ struct hv_vpset {
 /* HvCallSendSyntheticClusterIpi hypercall */
 struct hv_send_ipi {
 	u32 vector;
-	u32 reserved;
+	union hv_input_vtl in_vtl;
+	u8 reserved[3];
 	u64 cpu_mask;
 } __packed;
 
 /* HvCallSendSyntheticClusterIpiEx hypercall */
 struct hv_send_ipi_ex {
 	u32 vector;
-	u32 reserved;
+	union hv_input_vtl in_vtl;
+	u8 reserved[3];
 	struct hv_vpset vp_set;
 } __packed;
 
-- 
2.40.1