[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen stable-4.3] x86/tboot: invalidate FIX_TBOOT_MAP_ADDRESS mapping after use
commit 00eba3b0bc5db6933e1c920c6e51028315d559c9 Author: Jan Beulich <jbeulich@xxxxxxxx> AuthorDate: Thu Mar 12 14:22:10 2015 +0100 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Thu Mar 12 14:22:10 2015 +0100 x86/tboot: invalidate FIX_TBOOT_MAP_ADDRESS mapping after use In order for commit cbeeaa7d ("x86/nmi: fix shootdown of pcpus running in VMX non-root mode")'s re-use of that fixmap entry to not cause undesirable (in crash context) cross-CPU TLB flushes, invalidate the fixmap entry right after use. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> master commit: 375a09cffacff820e025c65d0cdfbd403ecb30cc master date: 2015-03-04 09:59:47 +0100 --- xen/arch/x86/tboot.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/xen/arch/x86/tboot.c b/xen/arch/x86/tboot.c index 1eed2e3..245d22c 100644 --- a/xen/arch/x86/tboot.c +++ b/xen/arch/x86/tboot.c @@ -140,6 +140,7 @@ void __init tboot_probe(void) TXT_PUB_CONFIG_REGS_BASE + TXTCR_SINIT_BASE); tboot_copy_memory((unsigned char *)&sinit_size, sizeof(sinit_size), TXT_PUB_CONFIG_REGS_BASE + TXTCR_SINIT_SIZE); + __set_fixmap(FIX_TBOOT_MAP_ADDRESS, 0, 0); } /* definitions from xen/drivers/passthrough/vtd/iommu.h @@ -477,6 +478,8 @@ int __init tboot_parse_dmar_table(acpi_table_handler dmar_handler) dmar_table_raw = xmalloc_array(unsigned char, dmar_table_length); tboot_copy_memory(dmar_table_raw, dmar_table_length, pa); dmar_table = (struct acpi_table_header *)dmar_table_raw; + __set_fixmap(FIX_TBOOT_MAP_ADDRESS, 0, 0); + rc = dmar_handler(dmar_table); xfree(dmar_table_raw); -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.3 _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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