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x86/msi: Fix msi message data shadow struct

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commit 59b18a1e65 upstream.

The x86 MSI message data is 32 bits in total and is either in
compatibility or remappable format, see Intel Virtualization Technology
for Directed I/O, section 5.1.2.

Fixes: 6285aa5073 ("x86/msi: Provide msi message shadow structs")
Co-developed-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Reto Buerki <reet@codelabs.ch>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220407110647.67372-1-reet@codelabs.ch
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Reto Buerki 2022-04-07 13:06:47 +02:00 • committed by Justin Hammond
parent 56ddb38de9
commit f2d27fdca5
1 changed files with 11 additions and 8 deletions
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19
arch/x86/include/asm/msi.h
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@ -12,14 +12,17 @@ int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
/* Structs and defines for the X86 specific MSI message format */
typedef struct x86_msi_data {
u32 vector : 8,
delivery_mode : 3,
dest_mode_logical : 1,
reserved : 2,
active_low : 1,
is_level : 1;
u32 dmar_subhandle;
union {
struct {
u32 vector : 8,
delivery_mode : 3,
dest_mode_logical : 1,
reserved : 2,
active_low : 1,
is_level : 1;
};
u32 dmar_subhandle;
};
} __attribute__ ((packed)) arch_msi_msg_data_t;
#define arch_msi_msg_data x86_msi_data