From: Jan Beulich <jbeulich@suse.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "George Dunlap" <George.Dunlap@eu.citrix.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH v2 1/9] x86: adjust cr3_pcid() return type
Date: Tue, 17 Sep 2019 08:13:00 +0200 [thread overview]
Message-ID: <be39b9f6-7404-8c05-26e3-4416533ed9a0@suse.com> (raw)
In-Reply-To: <625c29ba-cfb8-88ee-eb15-5f2019198865@suse.com>
There's no need for it to be 64 bits wide - only the low twelve bits
of CR3 hold the PCID.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
--- a/xen/arch/x86/flushtlb.c
+++ b/xen/arch/x86/flushtlb.c
@@ -103,7 +103,8 @@ static void do_tlb_flush(void)
void switch_cr3_cr4(unsigned long cr3, unsigned long cr4)
{
- unsigned long flags, old_cr4, old_pcid;
+ unsigned long flags, old_cr4;
+ unsigned int old_pcid;
u32 t;
/* This non-reentrant function is sometimes called in interrupt context. */
--- a/xen/include/asm-x86/processor.h
+++ b/xen/include/asm-x86/processor.h
@@ -287,7 +287,7 @@ static inline unsigned long cr3_pa(unsig
return cr3 & X86_CR3_ADDR_MASK;
}
-static inline unsigned long cr3_pcid(unsigned long cr3)
+static inline unsigned int cr3_pcid(unsigned long cr3)
{
return cr3 & X86_CR3_PCID_MASK;
}
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next prev parent reply other threads:[~2019-09-17 6:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 5:58 [Xen-devel] [PATCH v2 0/9] XSA-292 follow-up Jan Beulich
2019-09-17 6:13 ` Jan Beulich [this message]
2019-09-17 18:12 ` [Xen-devel] [PATCH v2 1/9] x86: adjust cr3_pcid() return type Andrew Cooper
2019-09-17 6:13 ` [Xen-devel] [PATCH v2 2/9] x86: limit the amount of TLB flushing in switch_cr3_cr4() Jan Beulich
2019-09-17 18:51 ` Andrew Cooper
2019-09-17 6:14 ` [Xen-devel] [PATCH v2 3/9] x86/mm: honor opt_pcid also for 32-bit PV domains Jan Beulich
2019-09-17 19:00 ` Andrew Cooper
2019-09-18 9:22 ` Jan Beulich
2019-09-18 11:55 ` Andrew Cooper
2019-09-18 12:04 ` Jan Beulich
2019-09-17 6:15 ` [Xen-devel] [PATCH v2 4/9] x86/HVM: move NOFLUSH handling out of hvm_set_cr3() Jan Beulich
2019-09-17 12:45 ` Paul Durrant
2019-09-17 13:03 ` Jan Beulich
2019-09-17 13:38 ` Paul Durrant
2019-09-17 19:31 ` Andrew Cooper
2019-09-18 9:29 ` Jan Beulich
2019-09-18 15:43 ` Tamas K Lengyel
2019-09-17 6:15 ` [Xen-devel] [PATCH v2 5/9] x86/HVM: refuse CR3 loads with reserved (upper) bits set Jan Beulich
2019-09-17 19:35 ` Andrew Cooper
2019-09-18 9:05 ` Jan Beulich
2019-09-17 6:16 ` [Xen-devel] [PATCH v2 6/9] x86/HVM: relax shadow mode check in hvm_set_cr3() Jan Beulich
2019-09-17 19:37 ` Andrew Cooper
2019-09-17 6:16 ` [Xen-devel] [PATCH v2 7/9] x86/HVM: cosmetics to hvm_set_cr3() Jan Beulich
2019-09-17 19:39 ` Andrew Cooper
2019-09-17 6:17 ` [Xen-devel] [PATCH v2 8/9] x86/CPUID: drop INVPCID dependency on PCID Jan Beulich
2019-09-17 19:59 ` Andrew Cooper
2019-09-18 9:10 ` Jan Beulich
2019-09-18 11:59 ` Andrew Cooper
2019-09-17 6:17 ` [Xen-devel] [PATCH v2 9/9] x86: PCID is unused when !PV Jan Beulich
2019-09-17 20:00 ` Andrew Cooper
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