x86/mce: Add support for physical address valid bit

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Starting with Zen6, AMD's Scalable MCA systems will incorporate two new bits in
MCA_STATUS and MCA_CONFIG MSRs. These bits will indicate if a valid System
Physical Address (SPA) is present in MCA_ADDR.

PhysAddrValidSupported bit (MCA_CONFIG[11]) serves as the architectural
indicator and states if PhysAddrV bit (MCA_STATUS[54]) is Reserved or if it
indicates validity of SPA in MCA_ADDR.

PhysAddrV bit (MCA_STATUS[54]) advertises if MCA_ADDR contains valid SPA or if
it is implementation specific.

Use and prefer MCA_STATUS[PhysAddrV] when checking for a usable address.

Signed-off-by: Avadhut Naik <avadhut.naik@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20251118191731.181269-1-avadhut.naik@amd.com

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Avadhut Naik 2025-11-18 19:15:03 +00:00 • committed by Borislav Petkov (AMD)

parent eeb3f76d73

commit 821f5fe4db

2 changed files with 15 additions and 3 deletions

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2

arch/x86/include/asm/mce.h

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16

arch/x86/kernel/cpu/mce/amd.c

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