Hello! On 5/8/23 10:44 PM, Thomas Gleixner wrote: > From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > For parallel CPU brinugp it's required to read the APIC ID in the low level > startup code. The virtual APIC base address is a constant because its a > fix-mapped address. Exposing that constant which is composed via macros to > assembly code is non-trivial dues to header inclusion hell. s/dues/due/? > Aside of that it's constant only because of the vsyscall ABI > requirement. Once vsyscall is out of the picture the fixmap can be placed > at runtime. > > Avoid header hell, stay flexible and store the address in a variable which > can be exposed to the low level startup code. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Tested-by: Michael Kelley <mikelley@xxxxxxxxxxxxx> [...] MBR, Sergey
