John Baldwin 2c352feb3b Fix missed posted interrupts in VT-x in bhyve. ... When a vCPU is HLTed, interrupts with a priority below the processor priority (PPR) should not resume the vCPU while interrupts at or above the PPR should. With posted interrupts, bhyve maintains a bitmap of pending interrupts in PIR descriptor along with a single 'pending' bit. This bit is checked by a CPU running in guest mode at various places to determine if it should be checked. In addition, another CPU can force a CPU in guest mode to check for pending interrupts by sending an IPI to a special IDT vector reserved for this purpose. bhyve had a bug in that it would only notify a guest vCPU of an interrupt (e.g. by sending the special IPI or by resuming it if it was idle due to HLT) if an interrupt arrived that was higher priority than PPR and no interrupts were currently pending. This assumed that if the 'pending' bit was set, any needed notification was already in progress. However, if the first interrupt sent to a HLTed vCPU was lower priority than PPR and the second was higher than PPR, the first interrupt would set 'pending' but not notify the vCPU, and the second interrupt would not notify the vCPU because 'pending' was already set. To fix this, track the priority of pending interrupts in a separate per-vCPU bitmask and notify a vCPU anytime an interrupt arrives that is above PPR and higher than any previously-received interrupt. This was found and debugged in the bhyve port to SmartOS maintained by Joyent. Relevant SmartOS bugs with more background: https://smartos.org/bugview/OS-6829 https://smartos.org/bugview/OS-6930 https://smartos.org/bugview/OS-7354 Submitted by: Patrick Mooney <pmooney@pfmooney.com> Reviewed by: tychon, rgrimes Obtained from: SmartOS / Joyent MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D19299		2019-03-01 20:43:48 +00:00
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amd64	Fix missed posted interrupts in VT-x in bhyve.	2019-03-01 20:43:48 +00:00
arm	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
arm64	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
bsm	Create new EINTEGRITY error with message "Integrity check failed".	2019-01-17 06:35:45 +00:00
cam	Refactor command ordering/blocking mechanism in CTL.	2019-02-27 21:29:21 +00:00
cddl	Improve readability of the code by making it explicit where the 'c' variable	2019-03-01 05:54:13 +00:00
compat	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
conf	There is no device atacard but there is device atapccard.	2019-03-01 15:00:13 +00:00
contrib	Modularize xz.	2019-02-26 19:55:03 +00:00
crypto	Regularize the Netflix copyright	2019-02-04 21:28:25 +00:00
ddb	ddb: Print the thread's pcb in 'show thread'	2019-02-09 21:08:19 +00:00
dev	Fortuna: push CTR-mode loop down into randomdev hash.h interface	2019-03-01 19:21:45 +00:00
dts	Adapt FreeBSD specific DT stub for Jetson TK1 board to be consistent with	2019-02-06 06:03:44 +00:00
fs	fuse: Fix a regression introduced in r337165	2019-02-21 02:41:57 +00:00
gdb
geom	Modularize xz.	2019-02-26 19:55:03 +00:00
gnu	gcov support	2019-02-23 21:14:00 +00:00
i386	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
isa
kern	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
kgssapi	* Handle SIGPIPE in gssd	2019-02-21 01:30:37 +00:00
libkern	Add non-sleepable strdup variant strdup_flags	2019-02-20 20:48:10 +00:00
mips	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
modules	Add another required header file.	2019-03-01 04:17:43 +00:00
net	iflib: Improve return values of interrupt handlers.	2019-02-15 18:51:43 +00:00
net80211	net80211(4): hide casts for 'i_seq' field offset calculation inside	2019-02-10 23:58:56 +00:00
netgraph	Remove remnants of byte order manipulation, back when FreeBSD stack	2019-02-09 03:00:00 +00:00
netinet	Honor the memory limits provided when processing the IPPROTO_SCTP	2019-03-01 18:47:41 +00:00
netinet6	When dropping a fragment queue count the number of fragments in the queue	2019-02-19 19:57:55 +00:00
netipsec	Remove unused argument to priv_check_cred.	2018-12-11 19:32:16 +00:00
netpfil	pf: IPv6 fragments with malformed extension headers could be erroneously passed by pf or cause a panic	2019-03-01 07:37:45 +00:00
netsmb	Remove unused argument to priv_check_cred.	2018-12-11 19:32:16 +00:00
nfs
nfsclient
nfsserver
nlm
ofed	Mechanical cleanup of epoch(9) usage in network stack.	2019-01-09 01:11:19 +00:00
opencrypto	Fix another bug introduced during the review process of r344140:	2019-02-25 19:14:16 +00:00
powerpc	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
riscv	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
rpc	Bump the default kern.rpc.gss.client_max from 128 to 1024.	2019-02-19 11:07:02 +00:00
security	Create new EINTEGRITY error with message "Integrity check failed".	2019-01-17 06:35:45 +00:00
sparc64	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
sys	Remove sv_pagesize, originally introduced with r100384.	2019-03-01 16:16:38 +00:00
teken	Attempt to complete fixing programmable function keys for syscons.	2019-02-20 02:14:41 +00:00
tests	Regularize the Netflix copyright	2019-02-04 21:28:25 +00:00
tools	make_dtb.sh: Use $CPP instead of assuming that cpp is in $PATH	2018-12-14 23:53:28 +00:00
ufs	FFS: allow sendfile(2) to work with block sizes greater than the page size	2019-02-26 04:56:10 +00:00
vm	vm: remove seq.h inclusion made obsolete by NUMA rewrite	2019-02-27 22:42:29 +00:00
x86	Add usermode helpers for for Intel userspace protection keys feature.	2019-02-20 09:56:23 +00:00
xdr
xen	xen: introduce a new way to setup event channel upcall	2019-01-30 11:34:52 +00:00
Makefile