git: c5a8a124c3 - main - relnotes/13.0: further powerpc* changes

[Piotr Kubaj]

The branch main has been updated by pkubaj (ports committer):

URL: https://cgit.FreeBSD.org/doc/commit/?id=c5a8a124c35c182d95a046f0b3b795ffdbb785af

commit c5a8a124c35c182d95a046f0b3b795ffdbb785af
Author:     Piotr Kubaj <pkubaj at FreeBSD.org>
AuthorDate: 2021-03-28 23:12:29 +0000
Commit:     Piotr Kubaj <pkubaj at FreeBSD.org>
CommitDate: 2021-03-28 23:12:29 +0000

    relnotes/13.0: further powerpc* changes
    
    Reported by: adalava
---
 website/content/en/releases/13.0R/relnotes.adoc | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/website/content/en/releases/13.0R/relnotes.adoc b/website/content/en/releases/13.0R/relnotes.adoc
index e34f74484e..aebce15393 100644
--- a/website/content/en/releases/13.0R/relnotes.adoc
+++ b/website/content/en/releases/13.0R/relnotes.adoc
@@ -45,6 +45,8 @@ Binary upgrades between RELEASE versions (and snapshots of the various security
 
 Source-based upgrades (those based on recompiling the FreeBSD base system from source code) from previous versions are supported, according to the instructions in [.filename]#/usr/src/UPDATING#.
 
+Upgrading powerpc64 systems from earlier FreeBSD Releases is NOT supported. Users need to reinstall, due to using new ABI.
+
 [IMPORTANT]
 ====
 Upgrading FreeBSD should only be attempted after backing up _all_ data and configuration files.
@@ -210,6 +212,8 @@ gitref:adeebf4cd47c[repository=src]
 New man:aio_readv[2] and man:aio_writev[2] system calls provide vectored
 analogues of man:aio_read[2] and man:aio_write[2]. gitref:022ca2fc7fe0
 
+powerpc64 switched to ELFv2 ABI at the same time it switched to LLVM. This brings us to a parity with modern Linux distributions. This also makes the binaries from previous FreeBSD versions incompatible with 13.0-RELEASE. Kernel still supports ELFv1, so jails and chroots using older FreeBSD versions are still compatible. gitref:e4399d169acc[repository=src]
+
 [[kernel]]
 == Kernel
 
@@ -499,8 +503,6 @@ if_dwc now supports checksum offloading. gitref:98ea5a7b9a1[repository=src]
 
 All powerpc architectures switched to LLVM and are currently mostly similar to amd64 toolchain-wise. gitref:678da4a27447[repository=src]
 
-Because lld doesn't support ELFv1 ABI, powerpc64 also switched to ELFv2 at the same time it switched to LLVM. This brings us to a parity with modern Linux distributions. gitref:e4399d169acc[repository=src]
-
 powerpc (32-bit) switched to Secure-PLT. gitref:e861dab45186[repository=src]
 
 powerpc64le (64-bit little endian port) was introduced, targeting POWER8 and newer processors. gitref:b75abea4d087[repository=src]
@@ -509,7 +511,9 @@ Radix MMU support for powerpc64 and powerpc64le (experimental, disabled by defau
 
 Superpages support for powerpc64 and powerpc64le (experimental, disabled by default). gitref:e2d6c417e303[repository=src]
 
-drm-kmod support (not base related, but involved fixing linuxkpi). gitref:937a05[repository=src]
+drm-kmod support (not base related, but involved fixing linuxkpi). gitref:937a05ba81c3[repository=src]
+
+Support QEMU/KVM pseries without hugepages. gitref:b934fc74683b[repository=src]
 
 Plenty of stability fixes, which fix many kernel panics.