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Date: Fri, 9 Oct 2020 11:46:11 +0100
From: David Woodhouse <dwmw2@...radead.org>
To: x86@...nel.org
Cc: kvm <kvm@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>,
Paolo Bonzini <pbonzini@...hat.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-hyperv@...r.kernel.org
Subject: [PATCH v2 3/8] x86/apic: Always provide irq_compose_msi_msg() method for vector domain
From: David Woodhouse <dwmw@...zon.co.uk>
This shouldn't be dependent on PCI_MSI. HPET and I/OAPIC can deliver
interrupts through MSI without having any PCI in the system at all.
Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
---
arch/x86/include/asm/apic.h | 8 +++-----
arch/x86/kernel/apic/apic.c | 32 +++++++++++++++++++++++++++++++
arch/x86/kernel/apic/msi.c | 36 -----------------------------------
arch/x86/kernel/apic/vector.c | 6 ++++++
4 files changed, 41 insertions(+), 41 deletions(-)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index b0fd204e0023..f5b88fb723bf 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -521,12 +521,10 @@ static inline void apic_smt_update(void) { }
#endif
struct msi_msg;
+struct irq_cfg;
-#ifdef CONFIG_PCI_MSI
-void x86_vector_msi_compose_msg(struct irq_data *data, struct msi_msg *msg);
-#else
-# define x86_vector_msi_compose_msg NULL
-#endif
+extern void __irq_msi_compose_msg(struct irq_cfg *cfg, struct msi_msg *msg,
+ bool dmar);
extern void ioapic_zap_locks(void);
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 113f6ca7b828..fba3ba383ad2 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -50,6 +50,7 @@
#include <asm/io_apic.h>
#include <asm/desc.h>
#include <asm/hpet.h>
+#include <asm/msidef.h>
#include <asm/mtrr.h>
#include <asm/time.h>
#include <asm/smp.h>
@@ -2480,6 +2481,37 @@ int hard_smp_processor_id(void)
return read_apic_id();
}
+void __irq_msi_compose_msg(struct irq_cfg *cfg, struct msi_msg *msg,
+ bool dmar)
+{
+ msg->address_hi = MSI_ADDR_BASE_HI;
+
+ msg->address_lo =
+ MSI_ADDR_BASE_LO |
+ ((apic->irq_dest_mode == 0) ?
+ MSI_ADDR_DEST_MODE_PHYSICAL :
+ MSI_ADDR_DEST_MODE_LOGICAL) |
+ MSI_ADDR_REDIRECTION_CPU |
+ MSI_ADDR_DEST_ID(cfg->dest_apicid);
+
+ msg->data =
+ MSI_DATA_TRIGGER_EDGE |
+ MSI_DATA_LEVEL_ASSERT |
+ MSI_DATA_DELIVERY_FIXED |
+ MSI_DATA_VECTOR(cfg->vector);
+
+ /*
+ * Only the IOMMU itself can use the trick of putting destination
+ * APIC ID into the high bits of the address. Anything else would
+ * just be writing to memory if it tried that, and needs IR to
+ * address higher APIC IDs.
+ */
+ if (dmar)
+ msg->address_hi |= MSI_ADDR_EXT_DEST_ID(cfg->dest_apicid);
+ else
+ WARN_ON_ONCE(MSI_ADDR_EXT_DEST_ID(cfg->dest_apicid));
+}
+
/*
* Override the generic EOI implementation with an optimized version.
* Only called during early boot when only one CPU is active and with
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 516df47bde73..de585cfa4d6c 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -23,42 +23,6 @@
struct irq_domain *x86_pci_msi_default_domain __ro_after_init;
-static void __irq_msi_compose_msg(struct irq_cfg *cfg, struct msi_msg *msg,
- bool dmar)
-{
- msg->address_hi = MSI_ADDR_BASE_HI;
-
- msg->address_lo =
- MSI_ADDR_BASE_LO |
- ((apic->irq_dest_mode == 0) ?
- MSI_ADDR_DEST_MODE_PHYSICAL :
- MSI_ADDR_DEST_MODE_LOGICAL) |
- MSI_ADDR_REDIRECTION_CPU |
- MSI_ADDR_DEST_ID(cfg->dest_apicid);
-
- msg->data =
- MSI_DATA_TRIGGER_EDGE |
- MSI_DATA_LEVEL_ASSERT |
- MSI_DATA_DELIVERY_FIXED |
- MSI_DATA_VECTOR(cfg->vector);
-
- /*
- * Only the IOMMU itself can use the trick of putting destination
- * APIC ID into the high bits of the address. Anything else would
- * just be writing to memory if it tried that, and needs IR to
- * address higher APIC IDs.
- */
- if (dmar)
- msg->address_hi |= MSI_ADDR_EXT_DEST_ID(cfg->dest_apicid);
- else
- WARN_ON_ONCE(MSI_ADDR_EXT_DEST_ID(cfg->dest_apicid));
-}
-
-void x86_vector_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
-{
- __irq_msi_compose_msg(irqd_cfg(data), msg, false);
-}
-
static void irq_msi_update_msg(struct irq_data *irqd, struct irq_cfg *cfg)
{
struct msi_msg msg[2] = { [1] = { }, };
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 1eac53632786..bb2e2a2488a5 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -818,6 +818,12 @@ void apic_ack_edge(struct irq_data *irqd)
apic_ack_irq(irqd);
}
+static void x86_vector_msi_compose_msg(struct irq_data *data,
+ struct msi_msg *msg)
+{
+ __irq_msi_compose_msg(irqd_cfg(data), msg, false);
+}
+
static struct irq_chip lapic_controller = {
.name = "APIC",
.irq_ack = apic_ack_edge,
--
2.26.2
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