Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH v3 4/7] x86/sev-es: Run #VC handler in plain IRQ state | Date | Tue, 8 Jun 2021 11:54:36 +0200 |
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From: Joerg Roedel <jroedel@suse.de>
Use irqentry_enter() and irqentry_exit() to track the runtime state of the #VC handler. The reason it ran in NMI mode was solely to make sure nothing interrupts the handler while the GHCB is in use.
This is handled now in sev_es_get/put_ghcb() directly, so there is no reason the #VC handler can not run in normal IRQ mode and enjoy the benefits like being able to send signals.
Fixes: 62441a1fb532 ("x86/sev-es: Correctly track IRQ states in runtime #VC handler") Signed-off-by: Joerg Roedel <jroedel@suse.de> --- arch/x86/kernel/sev.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c index 2a922d1b03c8..b563fb747aed 100644 --- a/arch/x86/kernel/sev.c +++ b/arch/x86/kernel/sev.c @@ -1354,8 +1354,7 @@ DEFINE_IDTENTRY_VC_SAFE_STACK(exc_vmm_communication) return; } - irq_state = irqentry_nmi_enter(regs); - lockdep_assert_irqs_disabled(); + irq_state = irqentry_enter(regs); instrumentation_begin(); /* @@ -1408,7 +1407,7 @@ DEFINE_IDTENTRY_VC_SAFE_STACK(exc_vmm_communication) out: instrumentation_end(); - irqentry_nmi_exit(regs, irq_state); + irqentry_exit(regs, irq_state); return; -- 2.31.1
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