Hi Robert, On Thu, 4 Apr 2024 21:38:34 +0800, Robert Hoo <robert.hoo.linux@xxxxxxxxx> wrote: > On 1/27/2024 7:42 AM, Jacob Pan wrote: > > When posted MSI is enabled, all device MSIs are multiplexed into a > > single notification vector. MSI handlers will be de-multiplexed at > > run-time by system software without IDT delivery. > > > > Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> > > --- > > arch/x86/include/asm/irq_vectors.h | 9 ++++++++- > > 1 file changed, 8 insertions(+), 1 deletion(-) > > > > diff --git a/arch/x86/include/asm/irq_vectors.h > > b/arch/x86/include/asm/irq_vectors.h index 3a19904c2db6..08329bef5b1d > > 100644 --- a/arch/x86/include/asm/irq_vectors.h > > +++ b/arch/x86/include/asm/irq_vectors.h > > @@ -99,9 +99,16 @@ > > > > #define LOCAL_TIMER_VECTOR 0xec > > > > +/* > > + * Posted interrupt notification vector for all device MSIs delivered > > to > > + * the host kernel. > > + */ > > +#define POSTED_MSI_NOTIFICATION_VECTOR 0xeb > > #define NR_VECTORS 256 > > > > -#ifdef CONFIG_X86_LOCAL_APIC > > +#ifdef X86_POSTED_MSI > > X86_POSTED_MSI --> CONFIG_X86_POSTED_MSI? Indeed, thanks for catching that! > > +#define FIRST_SYSTEM_VECTOR > > POSTED_MSI_NOTIFICATION_VECTOR +#elif defined(CONFIG_X86_LOCAL_APIC) > > #define FIRST_SYSTEM_VECTOR LOCAL_TIMER_VECTOR > > #else > > #define FIRST_SYSTEM_VECTOR NR_VECTORS > Thanks, Jacob
