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util/pgtblgen: Fix qemu on KVM 

Running the x86_64 qemu mainboard target with '-accel kvm' results in hang,
as the 'D' and 'A' bits needs to be set in read only page tables.

Tested on QEMU Q35: Boots into payload with '-accel kvm'.

Change-Id: I4beae8deec6bf34f9762e7b54c5da4e5b63f6d24
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36778
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patrick Rudolph 2019-11-12 16:56:43 +01:00 committed by Patrick Georgi
parent b73111cfa7
commit e69798b5ae
1 changed files with 8 additions and 6 deletions
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14
util/pgtblgen/pgtblgen.c
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@ -38,12 +38,14 @@ static void usage(char *argv[])
*
* Page table attributes: WB, User+Supervisor, Present, Writeable
*/
#define PRES (1ULL << 0)
#define RW (1ULL << 1)
#define US (1ULL << 2)
#define PS (1ULL << 7)
#define _GEN_DIR(a) (PRES | RW | US | (a))
#define _GEN_PAGE(a) (PRES | RW | US | PS | (a))
#define _PRES (1ULL << 0)
#define _RW (1ULL << 1)
#define _US (1ULL << 2)
#define _A (1ULL << 5)
#define _D (1ULL << 6)
#define _PS (1ULL << 7)
#define _GEN_DIR(a) (_PRES | _RW | _US | _A | (a))
#define _GEN_PAGE(a) (_PRES | _RW | _US | _PS | _A | _D | (a))
/*
* Generate x86_64 page tables.