On 2/22/24 12:40, Stephen Rothwell wrote:
This fails because https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?id=fdd867fe9b32
added new fields to that register (ID_AA64DFR1_EL1)
and commit b80b701d5a6 ("KVM: arm64: Snapshot all non-zero RES0/RES1 sysreg fields for later checking")
took a snapshot of the fields, so the RES0 (reserved 0) bits don't match anymore.
Not sure how to resolve it in the git branches though.
Thanks. I will apply this patch to the merge of the kvm-arm tree from
tomorrow (and at the end of today's tree).
Marc, Oliver, can you get a topic branch from Catalin and friends for
this sysreg patch, and apply the fixup directly to the kvm-arm branch in
the merge commit?
Not _necessary_, as I can always ask Linus to do the fixup, but
generally he prefers to have this sorted out by the maintainers if it is
detected by linux-next.
Paolo
From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Thu, 22 Feb 2024 22:31:22 +1100
Subject: [PATCH] fix up for "arm64/sysreg: Add register fields for ID_AA64DFR1_EL1"
interacting with "KVM: arm64: Snapshot all non-zero RES0/RES1 sysreg fields for later checking"
Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
arch/arm64/kvm/check-res-bits.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm64/kvm/check-res-bits.h b/arch/arm64/kvm/check-res-bits.h
index 967b5d171d53..39f537875d17 100644
--- a/arch/arm64/kvm/check-res-bits.h
+++ b/arch/arm64/kvm/check-res-bits.h
@@ -55,7 +55,6 @@ static inline void check_res_bits(void)
BUILD_BUG_ON(ID_AA64SMFR0_EL1_RES0 != (GENMASK_ULL(62, 61) | GENMASK_ULL(51, 49) | GENMASK_ULL(31, 31) | GENMASK_ULL(27, 0)));
BUILD_BUG_ON(ID_AA64FPFR0_EL1_RES0 != (GENMASK_ULL(63, 32) | GENMASK_ULL(27, 2)));
BUILD_BUG_ON(ID_AA64DFR0_EL1_RES0 != (GENMASK_ULL(27, 24) | GENMASK_ULL(19, 16)));
- BUILD_BUG_ON(ID_AA64DFR1_EL1_RES0 != (GENMASK_ULL(63, 0)));
BUILD_BUG_ON(ID_AA64AFR0_EL1_RES0 != (GENMASK_ULL(63, 32)));
BUILD_BUG_ON(ID_AA64AFR1_EL1_RES0 != (GENMASK_ULL(63, 0)));
BUILD_BUG_ON(ID_AA64ISAR0_EL1_RES0 != (GENMASK_ULL(3, 0)));
