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| author | Boqun Feng <boqun.feng@gmail.com> | 2020-02-10 06:39:53 +0300 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-03-09 17:51:31 +0300 |
| commit | 1cf106d93245f436c10e73cd3d4b885067d4bbcc (patch) | |
| tree | 3a204c8cf73a66d23bf196b2e1829c061dd13432 /arch/x86/include/asm/mshyperv.h | |
| parent | 61bfd920abbf2c8c9c3b10bb335475e707247573 (diff) | |
| download | linux-1cf106d93245f436c10e73cd3d4b885067d4bbcc.tar.xz | |
PCI: hv: Introduce hv_msi_entry
Add a new structure (hv_msi_entry), which is also defined in the TLFS,
to describe the msi entry for HVCALL_RETARGET_INTERRUPT. The structure
is needed because its layout may be different from architecture to
architecture.
Also add a new generic interface hv_set_msi_entry_from_desc() to allow
different archs to set the msi entry from msi_desc.
No functional change, only preparation for the future support of virtual
PCI on non-x86 architectures.
Signed-off-by: Boqun Feng (Microsoft) <boqun.feng@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Diffstat (limited to 'arch/x86/include/asm/mshyperv.h')
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 6b79515abb82..81fc30240122 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -4,6 +4,7 @@ #include <linux/types.h> #include <linux/nmi.h> +#include <linux/msi.h> #include <asm/io.h> #include <asm/hyperv-tlfs.h> #include <asm/nospec-branch.h> @@ -240,6 +241,13 @@ bool hv_vcpu_is_preempted(int vcpu); static inline void hv_apic_init(void) {} #endif +static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, + struct msi_desc *msi_desc) +{ + msi_entry->address = msi_desc->msg.address_lo; + msi_entry->data = msi_desc->msg.data; +} + #else /* CONFIG_HYPERV */ static inline void hyperv_init(void) {} static inline void hyperv_setup_mmu_ops(void) {} |